JP7741697B2 - Foundation cover installation structure and removal method - Google Patents

Description

This invention relates to a foundation cover installation structure and removal method.

Buildings such as houses are constructed on foundations that are poured into the site in advance.

Since it takes a certain amount of time from pouring the foundation until the building is constructed, it is necessary to protect (or waterproof) the foundation to prevent rainwater from getting inside during that period.

The typical foundation waterproofing method involves placing a foundation cover directly on top of the foundation, simply covering the entire foundation from above. The foundation cover is secured to the ground at its periphery with pegs.

There are also large-scale systems that involve erecting support pillars inside the foundation and using the pillars to stretch the foundation cover in a dome shape, thereby housing the foundation inside the dome-shaped foundation cover (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 11-311028

When the edges of the foundation cover were secured to the ground with pegs, the pegs alone were not strong enough to hold the cover in place, so there was a risk that the pegs would come loose and the foundation cover would be blown away by the wind.

Furthermore, even if the foundation is housed inside a dome-shaped foundation cover, there is a risk that the support pillars may fall over and crush the foundation cover, or that it may be blown away by the wind.

The main purpose of this invention is to contribute to improving the above-mentioned problems.

In response to the above problems, the present invention provides:
A foundation cover is provided to cover the foundation of a unit building in which multiple building units are installed side by side ,
The foundation cover is held by an anchor bolt embedded in the foundation and protruding upward via at least one of a mounting bracket and a rod-shaped member detachably attached to the mounting bracket,
The mounting hardware includes above-water hardware that is installed at least at both ends of the above-water edge of the foundation and at the boundary of the building unit , and under-water hardware that is installed at least at both ends of the below-water edge of the foundation opposite the above-water edge and at the boundary of the building unit ,
The above-water fittings are made higher than the below-water fittings , so that the foundation cover covers the foundation obliquely, with a downward slope from the above-water side to the below-water side .
The rod-shaped member is
A horizontal member disposed along the above-water side and supported by the above-water fittings;
A vertical diagonal member is disposed at the boundary portion perpendicular to the horizontal member and is supported downwardly by the above-water fittings and the below-water fittings,
Furthermore, an upper pressure rod is provided which is arranged parallel to the vertical diagonal members at a position between the vertical diagonal members and is placed on the foundation cover from above to form a drainage groove in the foundation cover with a downward slope that gradually becomes larger and deeper from the above-water side to the below-water side ,
The horizontal members are characterized by a foundation cover installation structure that can be disassembled to the length of the sides of the building units .

According to the present invention, the above-mentioned configuration can prevent the foundation cover from being blown away by the wind, etc. Furthermore, it is possible to install building units in order on the foundation of a modular building while maintaining a state in which rainwater does not get into the foundation.

1 is an overall perspective view of a unit building constructed on a foundation using the foundation cover installation structure of this embodiment. FIG. FIG. 2 is an overall perspective view of a building unit that constitutes the unit building of FIG. 1. FIG. 2 is a perspective view showing the construction procedure of the unit building of FIG. 1. FIG. 4 is a perspective view showing the construction procedure of the unit building following FIG. 3 . FIG. 4B is a plan view of the temporary rainproof sheet (ceiling cover) of FIG. 4A. This is an overall perspective view of the foundation with the foundation cover installed. FIG. 5B is a partial enlarged view of FIG. 5A. 1A is a longitudinal cross-sectional view of the foundation as viewed from the short side, and FIG. 1B is a partial longitudinal cross-sectional view of the foundation as viewed from the long side. 1 is a plan view of the cover pieces that make up the foundation cover, in which (a) is the cover piece that is installed last, (b) is the cover piece that is installed in the middle, and (c) is the cover piece that is installed first. 1A is a side view showing a state in which adjacent cover pieces are placed one on top of the other, and FIG. 1B is a partially enlarged view of FIG. 1A is an overall perspective view of the water fitting, FIG. 1B is a side view of the water fitting, and FIG. 1C is a front view of the water fitting. 1A is an overall perspective view of the underwater fitting, FIG. 1B is a side view of the underwater fitting, and FIG. 1C is a front view of the underwater fitting. (a) is an overall oblique view of the fixing bracket, (b) is a side view of the fixing bracket, (c) is a front view of the fixing bracket, (d) is a bottom view of the fixing bracket, and (e) is a three-view view (front view, side view, bottom view) of the length adjustment plate. FIG. 10 is a perspective view showing a structure for adjusting the length of the rod-shaped member and the upper presser bar. FIG. 10 is an overall perspective view of the foundation showing the state in which mounting brackets, rod-shaped members, etc. are attached to the bolt members. FIG. 10 is an overall perspective view of the foundation with the cover piece in place. FIG. 10 is an overall perspective view of the foundation showing the state in which the cover pieces are connected to each other. FIG. 10 is an overall perspective view of the foundation showing the state before the upper pressure bar is inserted into the bar-passing portion. (a) is an overall oblique view of the foundation showing the state after the upper pressure bar has been inserted into the bar-passing portion, and (b) is a partially enlarged oblique view showing the state in which the end of the upper pressure bar is fixed using a cap. This is an overall oblique view of the foundation, showing the state in which the upper pressure rod is inserted into the rod insertion portion (upper surface insertion portion) and placed on the foundation cover. 10A and 10B are enlarged partial views showing the state in which the peripheral edge of the foundation cover is fixed, in which (a) is the periphery of the water fitting, (b) is the periphery of the fixing fitting, and (c) is the periphery of the rising part covering part of the foundation cover. (a) is an overall oblique view of the foundation showing the state in which the upper pressure bar is being pulled out of the bar-passing portion, and (b) is an enlarged partial view of the above-water side of (a) showing the state in which the horizontal member is being pulled out. 1A and 1B are perspective views of the entire foundation showing the state in which a building unit is installed on the part of the foundation where the cover piece has been turned up, (a) being before installation and (b) being after installation. (a) is an overall perspective view of the foundation showing the state where the connecting part of the part where the building unit is installed is being removed, and (b) is an overall perspective view of the foundation showing the state where the vertical diagonal member is being pulled out from the flipped cover piece. FIG. 10 is an overall perspective view of the foundation showing the state in which the cover piece is being collected. The following are enlarged side views of building units showing the steps for connecting the upper side cover parts of adjacent temporary weatherproofing sheets. (a) shows the state when the preceding building unit is installed, and (b) shows the state when the upper side cover part is folded up and the adjacent building unit is lowered. 23A , which is a partial enlarged side view of a building unit showing the steps for connecting adjacent upper side cover parts to each other, in which (a) shows the state in which the upper side cover parts are connected to each other, and (b) shows the state in which the upper side cover part is folded in half. 23B, which are enlarged partial side views of the building unit showing the steps for connecting adjacent upper side cover parts. In this figure, (a) shows the state in which the folded upper side cover part is folded over onto the side of the later-installed upper side cover part, and (b) shows the state in which the binding member is attached to the folded upper side cover part. The following are enlarged side views showing the state in which an upper floor building unit is installed on top of a lower floor building unit, with (a) the weatherstripping sheet turned up and (b) the state in which the upper side cover of the adjacent weatherstripping sheet is attached to the lower side of the upper floor building unit. 1A is a plan view showing an arrangement of cover pieces relative to a foundation, and FIG. 1B is a schematic side view showing the installation of cover pieces (for a foundation the size of three building units). FIG. 24B is a component diagram (overall plan view) of the narrow cover piece that constitutes the base cover of FIG. 24A. This is a parts drawing (overall plan view) of the wide cover piece that constitutes the base cover of Figure 24A. 24B and 24C are enlarged views of the X, Y, and Z portions of the foundation cover, where (a) is a partial enlarged view along the width direction of the X portion, (b) is a partial enlarged view along the longitudinal direction of the X portion, (c) is a partial enlarged view along the width direction of the Y portion, (d) is a partial enlarged view along the width direction of the Z portion, and (e) is a partial enlarged view along the longitudinal direction of the Z portion. 24B is a side view of a side covering part for a short side of a foundation that constitutes the foundation cover of FIG. 24A. Of these, (a) is for the left side above the water, and (b) is for the right side above the water. 6 according to Example 2. In this figure, (a) is a longitudinal cross-sectional view of the foundation as seen from the short side, (b) is a partial longitudinal cross-sectional view of the foundation as seen from the long side, and (c) is a partial enlarged view of (a).

Hereinafter, this embodiment will be described in detail with reference to the drawings.
1 to 25 are provided to explain this embodiment.

<Configuration> The configuration of this example is explained below.

Building 1 is provided, such as a detached house or an apartment building. Building 1 may have any structure, but in this embodiment, it is, for example, a unit building as shown in Figure 1.

A unit building is a building 1 that can be constructed in a short period of time by prefabricating box-shaped (rectangular) building units 2, as shown in Figure 2, in a factory, transporting them to the construction site, and then assembling and installing them at the construction site, as shown in Figures 3 and 4A.

The unit building is constructed at the construction site by, for example, installing the building units 2 of the lower floor L side by side on the foundation 3 (Figure 3), and installing the building units 2 of the upper floor H side by side on top of the building units 2 of the lower floor L (Figure 4A).

Each building unit 2 has a unit frame with a box-frame rigid frame structure as its skeletal structure. As shown in Figure 2, the unit frame has a structure in which four metal ceiling beams 2b are connected in a rectangular shape between the upper ends of four metal columns 2a, and four metal floor beams 2c are connected in a rectangular shape between the lower ends of the four columns 2a. Exterior wall materials 2d and the like are attached to the outdoor side of the unit frame.

As shown in Figure 1, the foundation 3 is a reinforced concrete structure for installing the building 1 at a position higher than the ground. The foundation 3 has at least a peripheral rising portion that extends along the periphery of the building 1. The peripheral rising portion is, for example, in the shape of a substantially closed frame, and extends in the circumferential direction of the building 1 with a substantially constant width. The peripheral rising portion rises from the ground at a predetermined height h1 in the vertical direction 4. The peripheral rising portion is formed at a height of approximately 300 to 500 mm, preferably about 400 mm, from the ground.

The perimeter rising portion is formed to have approximately the same shape and size as the exterior of the building 1. In the case of a unit building, the perimeter rising portion will have the same shape and size as the exterior of the lower floor L of the building 1, which is formed by lining up multiple building units 2 of the lower floor L. The foundation 3 can be a continuous footing consisting only of the rising portion, including the perimeter rising portion, or a slab footing that seals the ground inside the perimeter rising portion, but either is acceptable.

In this embodiment, the foundation 3 has a peripheral rising portion that is approximately rectangular in plan view, with a pair of parallel long sides 3a, 3b and a pair of parallel short sides 3c, 3d. A plurality of building units 2, each of the same size, are placed side by side on this foundation 3. The building units 2 are placed side by side with their short sides aligned along the long sides 3a, 3b of the foundation 3. Therefore, the long sides 3a, 3b of the foundation 3 are approximately an integer multiple in length of the short sides of the building units 2. The short sides 3c, 3d of the foundation 3 are the same length as the long sides of the building units 2.

If the direction of the short side of the approximately rectangular shape is the width direction and the direction of the long side is the length direction, with the above arrangement, the width direction of the foundation 3 becomes the length direction of the building unit 2, and the length direction of the foundation 3 becomes the width direction of the building unit 2.

For example, the building units 2 are installed on such a foundation 3 in order from one short side 3c of the foundation 3 to the other short side 3d (installation direction 5 of the building units 2). However, the arrangement of the building units 2 and the shape of the outer peripheral rising portion are not limited to the above.

For the rectangular foundation 3 in plan view as described above, one long side 3a is the abovewater side, and the other long side 3b is the belowwater side. Furthermore, one short side 3c, which corresponds to the side on which the building unit 2 is installed first, is the upstream side in the installation direction 5, and the other short side 3d, which corresponds to the side on which the building unit 2 is installed later, is the downstream side in the installation direction 5.

One long side 3a may be the side below the water and the other long side 3b may be the side above the water, but it is preferable to choose the side above the water where small units and accessories to form a front porch, for example, will be installed.

Hereinafter, when simply referring to foundation 3, foundation 3 will primarily refer to the outer peripheral rising part of foundation 3.

As shown in Figure 3, a side cover 6 is attached to the opening on the indoor side of the building unit 2 to provide temporary weather protection for the opening, and a ceiling cover (top surface temporary weather protection sheet or temporary weather protection sheet 7) is attached to the top surface (ceiling) of the building unit 2 on the lower floor L to provide temporary weather protection for the top surface. Furthermore, insulation material 9 is installed on the inside of the foundation 3 (the rising portion of the outer perimeter).

The temporary weatherproofing sheet 7 covering the top surface of the building unit 2 on the lower floor L may be, for example, as shown in the component diagram in Figure 4B.

In other words, the temporary rainproofing sheet 7 has four upper side cover portions 7a that protrude from each of the four sides of the rectangular sheet body that covers the top surface of the building unit 2, and cover the upper parts of the four side surfaces of the building unit 2.

The upper side cover sections 7a are bent downward along the four sides of the building unit 2 and connected to adjacent upper side cover sections 7a by connecting sections 7b.

In addition, the back surface of the upper side cover portion 7a is provided with a second connecting portion 7c that can be bent upward to connect and separate from the adjacent upper side cover portion 7a of another temporary waterproofing sheet 7 installed on the top surface of an adjacent building unit 2.

The upper side cover portion 7a, which is equipped with the second connecting portion 7c, has a folding assistance line portion 7d extending longitudinally in the middle of its width to assist in folding the upper side cover portion 7a in half.

In this case, the temporary rainproofing sheet 7 is formed, for example, from a flexible synthetic resin sheet made of polyethylene or the like (polyethylene waterproof laminate sheet). The upper side cover portion 7a only needs to be present on at least the side where the adjacent building unit 2 is located, in order to connect to adjacent temporary rainproofing sheets 7. The connecting portion 7b and the second connecting portion 7c are, for example, hook-and-loop fasteners. The connecting portion 7b and the second connecting portion 7c are provided at least on both ends of the upper side cover portion 7a. The folding assistance line portion 7d is formed by a seam line, a welding line, or the attachment of a tape-like member, for example.

In this embodiment, in addition to the basic configuration described above, a foundation cover 8 is attached to the foundation 3 as shown in Figure 5A (Figure 5B, Figure 6) for temporary weatherproofing. Temporary weatherproofing temporarily protects the inside of the foundation 3 from rainwater during the curing of the foundation 3 or after completion, until immediately before the installation of the building units 2. Note that if there is no risk of rain during the above period, temporary weatherproofing is not necessary.

(About Foundation Cover 8)

The base cover 8 may have the following configuration:

(A1) A foundation cover 8 that covers the foundation 3 of the building 1 from above with a cover member 11,
The cover member 11 is divided into a plurality of cover pieces 12 to match the size of the building units 2 that are installed side by side on the foundation 3. Alternatively, the cover member 11 is made up of a plurality of cover pieces 12 formed to match the size of the building units 2.

Here, the foundation cover 8 is a flexible sheet-like temporary waterproofing material that completely covers the foundation 3 from above to provide temporary waterproofing for the inside of the foundation 3. The foundation cover 8 is a temporary component that is removed when the building unit 2 is installed.

The foundation cover 8 is primarily composed of a cover member 11. The cover member 11 is made of a thin, flexible, planar member (sheet or film) that can be folded or rolled. The entire cover member 11 is formed to a size that can cover at least the entire surface of the foundation 3.

The cover member 11 is formed from a synthetic resin sheet (polyethylene waterproof laminate sheet) made, for example, of polyethylene. This synthetic resin sheet is waterproof, inexpensive, lightweight, durable, and easy to use, and is therefore used for a variety of purposes, such as construction work sheets at construction sites. This work sheet is made from the same material as multi-purpose sheets that are effectively used for a variety of purposes, including in outdoor activities, leisure activities, and disaster prevention.

Dividing to fit the size of the building units 2 means that the portion of the cover member 11 that is inside the foundation 3 is separated at the position between adjacent building units 2, making it separate for each building unit 2. This means that the cover pieces 12 have at least a portion that is the same shape and size as the building units 2. Note that, as will be described later, each cover piece 12 will actually be slightly larger in shape and size than the building unit 2.

The cover piece 12 is a planar member of the required size that constitutes the cover member 11. By making the size and shape of the cover piece 12 approximately match the size of the building unit 2, or the size and shape of the part of the foundation 3 where the building unit 2 will be installed, the cover piece 12 will be roughly rectangular in plan view. The cover member 11 is easy to handle, as it can be removed from the foundation 3 by simply flipping it over the size of the building unit 2.

To ensure that the cover pieces 12 can be easily flipped over from above the foundation 3, the cover pieces 12 are installed on the foundation 3 in a sequential order in the opposite direction to the installation direction 5 of the building unit 2 (installation direction 13 of the cover pieces 12).

As a result, the upstream and downstream sides are reversed in the installation direction 5 of the building unit 2 and the installation direction 13 of the cover piece 12. In other words, when using the installation direction 13 of the cover piece 12 as a reference, the side of the other short side 3d of the foundation 3 is the upstream side, and the side of one short side 3c of the foundation 3 is the downstream side. To avoid confusion, hereafter, we may simply refer to the side of short side 3c and the side of short side 3d.

The cover pieces 12 are then installed in order, with portions overlapping one another, from the other short side 3d of the foundation 3 toward the other short side 3c of the foundation 3 (Figure 8). At this time, the other widthwise side edge (short side 3d) of the subsequent cover piece 12 is placed on top of the side edge (short side 3c) of the previously installed cover piece 12.

For example, as shown in Figure 7, the cover piece 12 has an inner surface covering portion 14 that mainly covers the inside portion (inner surface) of the foundation 3, and side surface covering portions 16 that are integrally formed on both longitudinal ends of the inner surface covering portion 14. The inner surface covering portion 14 has a surface that is approximately rectangular in plan view and is at least the same size and shape as the bottom surface of the building unit 2, or a larger surface. The side surface covering portion 16 is a surface that covers the side surfaces of the above-water and below-water sides (long sides 3a, 3b) of the foundation 3 from the outside. Note that the boundary between the inner surface covering portion 14 and the side surface covering portion 16 is not necessarily clear, but it will appear as a fold when placed over the foundation 3.

The cover pieces 12 also have overlapping portions 18, 19 that overlap the adjacent side edges of adjacent cover pieces 12. It is preferable that the overlapping portions 18, 19 extend to a length that reaches the installation position of the building unit 2 covered by the adjacent cover piece 12, or to a length that exceeds the installation position of the building unit 2. The boundary position of the overlapping portions 18, 19 on the inner surface covering portion 14 is not necessarily clear, but it becomes apparent when the cover pieces 12 are overlapped.

Furthermore, some of the cover pieces 12 have side covering portions 17 on one side edge that externally cover the sides of the short sides 3c and 3d of the foundation 3. The boundary between the inner covering portion 14 and the side covering portion 17 is not necessarily clear, but it appears as a fold when placed over the foundation 3.

The side covering portions 16 that cover the side surfaces of the long sides 3a and 3b of the foundation 3 are provided on all cover pieces 12. In contrast, the side covering portions 17 that cover the side surfaces of the short sides 3c and 3d of the foundation 3 are provided only on the first and last cover pieces 12 installed.

Figure 7 shows an example of a foundation cover 8 with the most basic configuration. This foundation cover 8 is made up of three different types of cover pieces 12: a first cover piece 12 (Figure 7(c)) that is installed first, one or more second cover pieces 12 (Figure 7(b)) that are installed in the middle, and a third cover piece 12 (Figure 7(a)) that is installed last. The main difference is that the first cover piece 12 and the third cover piece 12 have side covering portions 17 integrally formed on the side edges on different sides, while the second cover piece 12 does not have a side covering portion 17.

Of these, the side covering portions 16 are provided with a constant width along both longitudinal edge portions (short sides) of each cover piece 12. Furthermore, the side covering portions 17 are provided with a constant width or varying widths along one side edge portion (long side) of the first and last cover pieces 12 on the side where there are no adjacent cover pieces 12.

The overlapping portions 18, 19 are formed on at least the portion of the side edge (long side) of each cover piece 12 that overlaps with the adjacent cover piece 12. The portion of the side edge (long side) of each cover piece 12 that does not overlap with the adjacent cover piece 12 is the non-overlapping portion. Due to the presence of the overlapping portions 18, 19, the non-overlapping portion is narrower than the bottom surface of the building unit 2.

Of these, the overlapping portion 18 is the portion that is above the overlap and is provided on the side edge of the cover piece 12 on the side of the short side 3d of the foundation 3. The overlapping portion 18 is provided at least within the range of the inner surface covering portion 14, but can be made large enough to extend into the side surface covering portion 16. The overlapping portion 18 is not provided on the cover piece 12 that is installed first.

The overlapping portion 19 is the portion below the overlap, and is provided on the side edge of the cover piece 12 on the side of the short side 3c of the foundation 3. The overlapping portion 19 is provided at least within the range of the inner surface covering portion 14, but can be made large enough to extend into the side surface covering portion 16. The overlapping portion 19 is not provided on the cover piece 12 that is installed last.

In addition, as shown in FIG. 5B, the cover piece 12 has one or more mounting holes 22 and mounting aids 23 for threading a string-like member 21 such as a band. The mounting aids 23 can be, for example, a pocket (string-threading piece) with mounting holes 22 or a loop-shaped band. The mounting aids 23 are primarily provided on the back side (underside) of the cover piece 12. The string-like member 21 can be used to directly secure the cover piece 12 to the foundation 3 or the like, or to secure the cover piece 12 to the ground with pegs 24 or the like. The mounting holes 22 are appropriately provided at positions such as the edges of the side covering portions 16 and 17. The mounting aids 23 are appropriately provided at positions such as around the edges of the inner covering portion 14. The mounting holes 22 of the cover piece 12 and the pocket may be reinforced with grommets.

The configuration of the foundation cover 8 is not limited to the above, and can also be modified as shown in Figures 24A to 24E, for example. This modification will be described later.

(A2) As shown in Figure 7, the cover piece 12 may have connecting portions 32, 33 that can be connected to each other on the side edges located at the boundary portion 31 (e.g., Figure 3) between the building units 2.

Here, the boundary 31 is the position approximately directly below the adjacent lower edges (nearby floor beams 2c) of the building units 2 installed adjacent to each other on the foundation 3.

The side edges of the cover piece 12 (where the connecting portions 32, 33 are provided) are the side edges that become the overlapping portions 18, 19. The connecting portions 32, 33 are not particularly necessary for side edges that do not become overlapping portions 18, 19 and do not have an adjacent cover piece 12.

If the connecting portions 32, 33 are not provided, the cover pieces 12 are simply installed by lining them up or overlapping them so that no gaps are formed. This is acceptable, but it is preferable to provide the connecting portions 32, 33.

The connecting portion 32 is attached to the overlapping portions 18, 19 along or near the side edges of the cover piece 12. The connecting portion 32 is primarily provided within the interior covering portion 14, but may also extend to the side covering portions 16 on both sides.

The connecting portion 33 is provided primarily between the side covering portions 16 of adjacent cover pieces 12, or between the side covering portion 16 and the side covering portion 17 of the same cover piece 12.

The connecting portions 32, 33 may be any type that can connect adjacent cover pieces 12, but can be, for example, a fastener or a hook-and-loop fastener. In this embodiment, one connecting portion 32 is a fastener, and the other connecting portion 33 is a hook-and-loop fastener.

The fastener portion is provided on the side edge of the cover piece 12 as a connector (connecting member) for connecting and integrating at least the inner covering portions 14 of the cover pieces 12.

The fastener portion mainly comprises a ribbon tape 32a with numerous interlocking portions called teeth along one side edge. The fastener portion is a combination of two ribbon tapes 32a and an operating slider 32b for engaging and separating the teeth.

In this embodiment, the slider 32b is attached to one of the ribbon tapes 32a. The ribbon tape 32a to which the slider 32b is attached serves as a male zipper, and the other ribbon tape 32a to which the slider 32b is not attached serves as a female zipper. A lead string 32c may be attached to the handle of the slider 32b. The lead string 32c is preferably approximately the same length as or longer than the short sides 3c, 3d of the base 3.

The hook-and-loop fasteners are provided on each part of the cover piece 12 as connectors (connecting members) to connect and integrate the side covering portions 16 of adjacent cover pieces 12, or the side covering portion 16 and the side covering portion 17 of the same cover piece 12.

A hook-and-loop fastener is a flexible surface-fixing member that directly attaches surfaces together using a hooking force. There are two types of hook-and-loop fasteners: a first ribbon tape 33a (female) with multiple loops on its surface, and a second ribbon tape 33b (male) with multiple hooks on its surface. A hook-and-loop fastener that functions as a connector is formed by combining the first ribbon tape 33a and the second ribbon tape 33b in a one-to-one relationship.

The fastener portion and hook-and-loop fastener are sewn to overlapping positions between the upper surface of the side edge of the cover piece 12 that is installed first and the lower surface of the side edge of the cover piece 12 that is installed last. At this time, the pair of ribbon tapes 32a (male and female) of the fastener portion and one ribbon tape 32a and the other ribbon tape 32a of the hook-and-loop fastener are installed separately on either the upper or lower surface.

As shown in Figure 8, if necessary, the overlapping cover piece 12 may have a zipper cover 35 formed at the overlapping portion 18 that covers the connecting portions 32, 33 from above. The overlapping cover piece 12 may also have a backing sheet 36 welded to the back side that covers the attachment portions (seams) of the connecting portions 32, 33 from the back. This more effectively prevents rainwater from leaking from the connecting portions 32, 33.

(A3) As shown in Figure 8, the cover piece 12 may be provided with a magnet 41 on its side edge that can be magnetically attracted to the building unit 2.

Here, the magnet 41 is a magnetic material (permanent magnet) that is attracted to metal by magnetic force. The magnet 41 is attracted to the lower edge (floor beam 2c) of the metal unit frame that makes up the building unit 2. The magnet 41 is installed on or around the side edge of the cover piece 12 that will be covered by the cover piece 12 that will be installed later.

In this case, the overlapping portion 19 formed on the side edge of the cover piece 12 is extended until it reaches the lower edge of the building unit 2 that will be installed at the position of the cover piece 12 to be installed later. A magnet 41 is attached to the leading edge of this extended overlapping portion 19 or its periphery. The magnet 41 may be sewn or glued to the leading edge of the overlapping portion 19, or the leading edge may be made cylindrical and inserted into it.

The magnets 41 may be provided at least at both ends of the inner covering portion 14 relative to the side edge of the cover piece 12, but may also be provided continuously or discontinuously along the side edge. The magnets 41 may be, for example, granular, block-shaped, or rod-shaped.

(A4) As shown in FIG. 5A (FIG. 5B),
The cover member 11 may be supported by a rod-shaped member 51 installed on the foundation 3 in an inclined state with one end higher than the other end (FIG. 6).
The cover piece 12 may be provided with a rod-passing portion 52 (FIG. 8) through which the rod-shaped member 51 passes.

The cover member 11 may be installed on the foundation 3 using rod-shaped members 51 so that the inner covering portion 14 is approximately horizontal, but it is preferable to install the inner covering portion 14 at an incline. The cover member 11 is inclined from one end (above water) to the other end (below water) so that the downward slope is at least equal to or greater than the drainage gradient.

When the cover member 11 is tilted, the width of the side covering portions 16, 17 is formed to a size that corresponds to the tilt of the cover member 11 so that the side covering portions 16, 17 can cover almost the entire side of the foundation 3 or at least the upper part.

In other words, the side covering portion 16 on one end of the cover member 11, which is higher, is wider than the side covering portion 16 on the other end by the amount of lift.

Specifically, as shown in Figure 6, the width of the underwater side covering portion 16 (or the vertical dimension when installed) is preferably approximately the same as the height h1 of the foundation 3 or slightly higher (height h1 ± α). The width of the underwater side covering portion 16 should be at least large enough to cover the periphery of the top (top) of the foundation 3 or the upper side of the foundation 3 (for example, at least half of h1), and it is sufficient for it to be in contact with the ground at most, so it should be set appropriately within that range.

Therefore, the width of the abovewater side covering portion 16 is approximately the width of the belowwater side covering portion 16 (height h1±α) plus the height h2 by which the abovewater side is raised above the top of the foundation 3. This allows the belowwater and abovewater side covering portions 16 to smoothly cover the entire side of the foundation 3, or at least the upper periphery.

In addition, in order to accommodate the difference in width between the below-water side and above-water side covering portions 16 and to be able to cover at least the upper portions of the sides of the short sides 3c and 3d of the foundation 3 without any problems, the side covering portions 17 are trapezoidal in shape (Figure 7).

The rod-shaped member 51 is a framework or support rod attached to the foundation 3 so that one end of the cover member 11 is higher than the other end and is maintained in an inclined position where one end is higher than the other end. There are several types of rod-shaped member 51. The rod-shaped member 51 will be described later.

The rod-passing portion 52 is a cylindrical portion for passing the rod-shaped member 51 through. The rod-passing portion 52 is attached to and integrated with each of the cover pieces 12 that make up the cover member 11. The rod-passing portion 52 will be described later. At least one rod-passing portion 52 is installed on the cover piece 12, for example, near the position of the connecting portion 32 or magnet 41, while avoiding these.

The height h2 of one end of the cover member 11 from the foundation 3 needs only to be higher than the foundation 3, but is preferably as follows:

(A5) As shown in Figure 6, the height h2 of one end of the cover member 11 from the foundation 3 may be higher than the delivery height h3 of the underfloor equipment 61 installed within the foundation 3.

Here, underfloor equipment 61 refers to equipment installed under the floor, such as an air conditioning indoor unit or an underfloor heating system.

The loading height h3 is the vertical dimension 4 required to pass the underfloor equipment 61. The loading height h3 is the vertical dimension of the underfloor equipment 61 plus the required working space. The loading height h3 can be set, for example, between 450 mm and 600 mm, preferably around 600 mm.

A rod-shaped member 51 is then installed on the above-water side (long side 3a) of the foundation 3, at a position above the long side 3a, so that it is higher than the delivery height h3. A cover member 11 is then placed over this rod-shaped member 51. This raises one end of the cover member 11 installed on the foundation 3 to the above-mentioned height h2, and creates a working space between the top of the foundation 3 and the rod-shaped member 51 for delivering the underfloor equipment 61. The above-mentioned height h2 can be set to, for example, 600 mm to 800 mm, and preferably around 700 mm.

As a result, the width (or vertical dimension when installed) of the side covering portion 16 at one end (above water) of the cover member 11 is wider than the width of the side covering portion 16 at the other end (below water) by the height h2, which is greater than the delivery height h3.

(About the installation structure of the foundation cover 8)

The installation structure of the foundation cover 8 can be any, but for example, it can be as follows.

(B1) As shown in Figure 5A (Figure 5B), a foundation cover 8 is provided on the foundation 3 of the building 1 to cover the foundation 3 from above.
The foundation cover 8 is held by a bolt member 71 protruding from the foundation 3 via a mounting bracket 72 or a rod-shaped member 51 attached to the mounting bracket 72 .

Here, the installation structure for the foundation cover 8 is a structure for installing the foundation cover 8 on the foundation 3.

The bolt members 71 are preferably anchor bolts embedded in the foundation 3 (at its outer peripheral rising portion) so as to protrude upward from the top of the foundation 3 (the upper surface of the outer peripheral rising portion). However, it is also possible to attach dedicated bolt members 71 to the foundation 3 separately from the anchor bolts. In the case of a unit building, anchor bolts are installed at least at or near the four corners (of the columns 2a) of each building unit 2 when the building units 2 are installed on top of the foundation 3. Anchor bolts are also installed as appropriate in the middle of the short sides 3c and 3d of the foundation 3, etc.

As shown in Figure 9 (Figure 10), the mounting bracket 72 is a bracket (support rod mounting bracket) that is installed on the bolt member 71 to secure the rod-shaped member 51 to the bolt member 71, and has a bolt mounting portion 73 at least at its lower part that can be attached to the bolt member 71.

The bolt mounting portion 73 may be, for example, a nut portion 73a that can be directly screwed onto the bolt member 71.

The nut portion 73a may be constructed by combining multiple types of nut members, such as a hexagonal nut, a high nut, and a hexagonal nut.

The mounting bracket 72 has a clamp portion 74 at least at its upper portion that can secure the rod-shaped member 51. The clamp portion 74 is attached to a clamp support portion 75.

The clamp portion 74 has a structure in which, for example, one side (upper side) of two semi-cylindrical clamp pieces 74a, 74b is connected by a hinge portion 74c so that they can be opened and closed. The other side (lower side) of the clamp pieces 74a, 74b is fixed to the clamp support portion 75 by a fastening member 74d such as a bolt and nut. The nut of the fastening member 74d is preferably a wing nut (Figure 10(c)) so that it can be operated by hand.

The mounting bracket 72 has a height setting member 76 interposed between the lower bolt mounting portion 73 and the upper clamp support portion 75. The height setting member 76 determines the height of the mounting bracket 72. The height setting member 76 can be, for example, a threaded bolt extending in the vertical direction 4 or a rod with threads on both the top and bottom ends.

Several types of mounting brackets 72 are used depending on the installation position relative to the foundation 3. Mounting brackets 72 will be described later.

The rod-shaped member 51 is a long, rod-shaped member that serves as a framework for keeping the foundation cover 8 covering the top of the foundation 3. It is preferable to use, for example, a hollow metal pipe member (support pipe) for the rod-shaped member 51, so that it has the appropriate weight and necessary strength.

Several types of rod-shaped members 51 are used depending on the installation position relative to the foundation 3. The rod-shaped members 51 will be described later.

The foundation cover 8 is indirectly fixed to the foundation 3 by being connected at least at one point to the mounting bracket 72 or rod-shaped member 51 attached to the bolt member 71, thereby achieving a strong fixed state using the foundation 3. However, the foundation cover 8 may also have a portion that is directly fixed to the bolt member 71.

(B2) The mounting bracket 72 may include an above-water bracket 81 (Figure 9) installed on the above-water edge of the foundation 3, and an below-water bracket 82 (Figure 10) installed on the below-water edge of the foundation 3.
The above-water fitting 81 is higher than the below-water fitting 82 .
The rod-shaped member 51 may be provided with a horizontal member 83 arranged along the above-water edge and supported by above-water fittings 81, and a vertical diagonal member 84 arranged approximately perpendicular to the horizontal member 83 and supported at a downward slope by the above-water fittings 81 and the below-water fittings 82.
Furthermore, an upper pressure bar 85 (FIG. 5A) may be provided which is disposed parallel to the vertical diagonal members 84 at a position between the vertical diagonal members 84 and placed on the foundation cover 8 from above.

Here, the above-water side is one of a pair of parallel long sides 3a, 3b of the foundation 3, and in this embodiment it is long side 3a.

As shown in Figure 9, the above-water fitting 81 has two clamps 74 (first clamp 86, second clamp 87) at the top that can respectively secure two rod-shaped members 51 (horizontal member 83 and vertical diagonal member 84).

The clamp support portion 75 is an L-shaped angle bracket or the like having a horizontal surface 75a and a vertical surface 75b, with the vertical surface 75b facing in the extension direction of the vertical diagonal member 84 (a direction parallel to the short sides 3c and 3d of the foundation 3).

The clamp portion 74 is attached at different heights relative to the horizontal surface 75a and the vertical surface 75b.

The clamp portion 74 (first clamp portion 86) of the horizontal member 83 is attached to the lower horizontal surface 75a so that it faces in the extension direction of the horizontal member 83 (a direction parallel to the long side a of the foundation 3).

The clamp portion 74 (second clamp portion 87) of the vertical diagonal member 84 is attached to the upper portion of the vertical surface 75b, which is higher than the horizontal surface 75a, so as to face in the extension direction of the vertical diagonal member 84.

The position of the lower part of the first clamp part 86 (approximately the mounting position relative to the horizontal member 83) is set to be at least approximately the same as or slightly higher than the delivery height h3 of the underfloor equipment 61 described above. The abovewater side of the foundation cover 8 is then placed over the vertical diagonal member 84, which is fixed to the second clamp part 87, which is higher than the first clamp part 86.

The height setting member 76, located between the lower bolt mounting portion 73 of the above-water fitting 81 and the upper clamp support portion 75 (horizontal surface 75a), is a long, pillar-like member that determines the height of the above-water fitting 81. The lower end of the height setting member 76 is threadedly attached to the bolt mounting portion 73 (nut portion 73a), and the upper end is fastened to the clamp support portion 75 using a hex nut.

The underwater side is the other of the pair of parallel long sides 3a, 3b of the foundation 3, and in this embodiment it is long side 3b.

As shown in Figure 10, the underwater fitting 82 has one clamp portion 74 (third clamp portion 88) at the top that can secure the rod-shaped member 51 (vertical diagonal member 84).

The clamp support portion 75 is an L-shaped angle bracket or the like having a horizontal surface 75a and a vertical surface 75b, with the vertical surface 75b facing in the extension direction of the vertical diagonal member 84.

The clamp portion 74 is attached to the upper part of the vertical surface 75b so that it faces in the direction in which the diagonal member 84 extends. The underwater portion of the foundation cover 8 is placed over the diagonal member 84 fixed to the third clamp portion 88, so that it is slightly higher than the foundation 3 from above the diagonal member 84.

The height setting member 76, located between the lower bolt mounting portion 73 of the underwater fitting 82 and the upper clamp support portion 75 (horizontal surface 75a), is a short pillar-like member that determines the height of the underwater fitting 82. The height setting member 76 of the underwater fitting 82 is shorter than the height setting member 76 of the abovewater fitting 81 (by an amount corresponding to the inclination angle of the vertical diagonal member 84). The clamp support portion 75 of the underwater fitting 82 is supported by the height setting member 76 at a position slightly higher than the top of the foundation 3. The lower end of the height setting member 76 is threadedly attached to the bolt mounting portion 73, and the upper end is fastened to the clamp support portion 75 using a hex nut.

In addition, since the height setting member 76 of the underwater fitting 82 may be short, the clamp support portion 75 itself may be shaped to extend downward and function as the height setting member 76. For example, the clamp support portion 75 may have its vertical surface 75b extended by the length of the height setting member 76, and its horizontal surface 75a directly fixed to the bolt member 71. Furthermore, by orienting the two surfaces of the L-shaped angle fitting of the clamp support portion 75 in the vertical direction 4 and arranging it at the required length, the clamp support portion 75 can combine the function of attaching the clamp portion 74 with the function of setting the height.

Furthermore, fixing brackets 91 (Figure 11) may be installed on the other sides of the foundation 3. The other sides are a pair of parallel short sides 3c, 3d of the foundation 3. The fixing brackets 91 are attached to at least one or all of the bolt members 71 provided on the short sides 3c, 3d of the foundation 3.

The fixing brackets 91 are pillar-shaped fittings (cover mounting fittings) for fixing the periphery of the side edges of the foundation cover 8 (its inner covering portion 14) to the short sides 3c, 3d of the foundation 3. The fixing brackets 91 are not the mounting brackets 72 for supporting the rod-shaped members 51. However, by providing the fixing brackets 91, the foundation cover 8 is given tension in the installation direction 13 and the effects of wind force acting on the diagonal members 84 located closest to the short sides 3c, 3d of the foundation 3 can be reduced.

The fixing bracket 91 is a corner bracket or the like that is approximately triangular in side view, having a horizontal surface 91a, a vertical surface 91b, and a triangular side plate portion 91c. The horizontal surface 91a is strip-shaped and extends in the width direction of the short sides 3c, 3d of the foundation 3. The vertical surface 91b is strip-shaped and its width direction faces the extension direction of the short sides 3c, 3d of the foundation 3. The side plate portion 91c connects the horizontal surface 91a and the vertical surface 91b on one side.

The horizontal surface 91a located at the bottom of the fixing bracket 91 serves as the bolt mounting portion 73, which has a surface (mounting surface) that directly abuts the top of the foundation 3. A bolt insertion hole 73b is formed in the horizontal surface 91a, and a bolt member 71 can be passed through the bolt insertion hole 73b and fastened to the foundation 3 from above with a nut member.

A height adjustment plate 92 is attached to the top of the vertical surface 91b so that it can slide in the vertical direction 4. The height adjustment plate 92 is a rectangular plate that has approximately the same width as the vertical surface 91b and extends in the vertical direction 4, and has a surface parallel to the vertical surface 91b. The height adjustment plate 92 is adjusted to a height that corresponds to its installation position, so that it is the same height as or slightly lower than the portion of the vertical diagonal member 84 that is adjacent to the fixing bracket 91.

Bolt insertion holes 94a and 94b are formed in the vertical surface 91b and height adjustment plate 92, respectively, for passing fastening fixtures 93 such as bolts and nuts through them, and the fastening fixtures 93 are fastened in the direction perpendicular to the surface.

At least one of the bolt insertion holes 94a, 94b is an elongated hole extending in the vertical direction 4. In this embodiment, the elongated hole is the bolt insertion hole 94b of the height adjustment plate 92. The height adjustment plate 92 has an attachment hole 92a at its top for attaching the foundation cover 8.

The foundation cover 8 is fixed to the upper end portion of the fixing bracket 91 (mounting hole portion 92a of the height adjustment plate 92) with a string-like member 21 such as a band, using the mounting hole 22 of the mounting auxiliary portion 23 (string-threading piece) (see, for example, Figure 19(b)). Therefore, the mounting auxiliary portion 23 and mounting hole 22 are appropriately provided at least at the upper end portion of each height adjustment plate 92 on the foundation cover 8 and in positions close to each bolt member 71 (positions close to the long sides 3a and 3b or short sides 3c and 3d of the foundation 3).

The horizontal members 83 and vertical diagonal members 84, which serve as rod-shaped members 51, are attached to the foundation 3 and form the main framework that supports the foundation cover 8 from below. Note that the "horizontal" in the horizontal members 83 and the "vertical" in the vertical diagonal members 84 refer to the orientation of the long sides 3a, 3b and the short sides 3c, 3d when the top of the foundation 3 is viewed in a plan view.

The horizontal horizontal member 83 is a rod-shaped member 51 that connects and integrates the upper portions of the above-water fittings 81. The horizontal horizontal member 83 is installed between multiple above-water fittings 81 so that its middle portion, other than both ends, does not substantially contact the foundation cover 8. The horizontal horizontal member 83 has approximately the same length as the above-water side (long side 3a) of the foundation 3 and is installed approximately horizontally at a high position (directly above or nearby) above the above-water side (a position higher than the top of the foundation 3 by the delivery height h3 of the underfloor equipment 61 described above). The horizontal horizontal member 83 is attached so that both ends slightly extend beyond the clamp portions 74 of the above-water fittings 81 located at the outermost positions. This allows the foundation cover 8 to be expanded in the direction of the long sides 3a and 3b of the foundation 3.

The vertical diagonal members 84 are rod-shaped members 51 that directly support the foundation cover 8 from below. The vertical diagonal members 84 have a length approximately equal to the pair of short sides 3c, 3d of the foundation 3 (or are longer than the short sides 3c, 3d by the amount of inclination). Single or multiple vertical diagonal members 84 are installed above the short sides 3c, 3d (directly above or nearby), and at appropriate positions inside the foundation 3, with a downward slope from the abovewater side to the belowwater side. In the case of a unit building, one vertical diagonal member 84 is installed inside the foundation 3 near the boundary 31 between adjacent building units 2. The vertical diagonal members 84 are attached so that both ends slightly extend beyond the clamp portions 74 (second clamp portion 87, third clamp portion 88) of the abovewater fittings 81 and belowwater fittings 82. This allows the foundation cover 8 to expand in the direction of the short sides 3c, 3d of the foundation 3.

The upper pressure bar 85 is a framework (central rib) that is placed on top of the foundation cover 8 and holds the foundation cover 8 from above. The upper pressure bar 85 is not used as a framework to support the foundation cover 8 from below, and is not directly connected to other frameworks. Therefore, although the upper pressure bar 85 is separated from the rod-shaped member 51 in a narrow sense, it supports the foundation cover 8 as a whole, and therefore can be included in the rod-shaped member 51 as part of the framework in a broad sense.

The upper pressure rod 85 has approximately the same length as the vertical diagonal members 84 and is installed approximately midway between adjacent vertical diagonal members 84, approximately parallel to the vertical diagonal members 84. In the case of a unit building, the upper pressure rod 85 is installed near the center of the width of each building unit 2. In this embodiment, the upper pressure rod 85 is installed so that one end is located above the horizontal member 83 and the other end is located above the underwater side of the foundation 3 (long side 3b).

By installing the upper pressure bar 85, the weight of the upper pressure bar 85 causes the base cover 8 to become depressed at the position of the upper pressure bar 85, forming a downward-sloping drain groove 89 (Figure 8).

The other end of the upper pressure bar 85 may be lower than the other end of the vertical diagonal member 84 (at a height of approximately 200 mm), so that it either comes into direct contact with the top surface of the long side 3b, or it may be slightly raised above the long side 3b without coming into contact with the ground.

At this time, the foundation cover 8 takes on a mountain-valley shape with the vertical diagonal members 84 at the top and the upper pressure bar 85 at the bottom, and is pulled in the mountain-valley direction (the installation direction 13 of the foundation cover 8). Furthermore, by positioning the connecting portions 32 between the cover pieces 12 at a relatively high position near the mountain, between the mountain (vertical diagonal members 84) and the valley (upper pressure bar 85), rainwater is less likely to enter through the connecting portions 32. In this embodiment, the connecting portions 32 are located slightly closer to the short side 3d than the vertical diagonal members 84.

The horizontal members 83, vertical diagonal members 84, and upper pressure bar 85 can all be made to have the same diameter and thickness, but since they require different strengths, they may also have different diameters and thicknesses. In this embodiment, the vertical diagonal members 84, which directly support the foundation cover 8 and therefore require the greatest strength, are made the largest in diameter and thickest in thickness. The upper pressure bar 85, which is simply placed on top of the foundation cover 8 and does not require as much strength, is made the smallest in diameter and thinnest in thickness. The horizontal members 83 are either the same diameter and thickness as the vertical diagonal members 84, or somewhere between those of the vertical diagonal members 84 and the upper pressure bar 85.

(B3) As shown in Figure 12, the rod-shaped member 51 may be adjustable in length.

Here, "adjustable length" means that the length can be changed. The rod-shaped member 51 may not be adjustable in length, but it is preferable that the length be adjustable. To adjust the length, the rod-shaped member 51 may be composed of, for example, multiple short metal pipe pieces 51a and metal screw joints 51b.

In this case, the rod-shaped member 51 is made by connecting multiple short pipe pieces 51a with screw joints 51b to obtain the required length. Conversely, by removing the pipe pieces 51a at the screw joints 51b, the rod-shaped member 51 can be disassembled into multiple short pipe pieces 51a. The pipe pieces 51a may all be the same length, or different lengths may be mixed. If the pipe pieces 51a are all the same length, the rod-shaped member 51 will have a length that is an integer multiple of the length of a single pipe piece 51a.

The pipe piece 51a has male threads 51c on the outer surface of both ends. The screw joint 51b is a single tubular member with an inner diameter that can fit onto the end of the pipe piece 51a, and has a female thread 51d on its inner surface into which the male threads 51c can be threaded.

The screw joint 51b may be constructed as a separate component from the pipe piece 51a, or may be fixed to one end of the pipe piece 51a and integrated with it.

The rod-shaped member 51 can be configured so that at least one of the horizontal member 83, vertical diagonal member 84, and upper pressure bar 85 is length adjustable, but it is preferable to make all of them length adjustable. Figure 12 shows an example of the vertical diagonal member 84, but the horizontal member 83 and upper pressure bar 85 can also be equipped with a similar length adjustment structure (or connecting structure).

Specifically, in the case of a unit building, it is preferable that the main pipe pieces 51a that make up the horizontal members 83 be formed to a length that is an integral fraction of the shorter side of the building unit 2.

In addition, in the case of a unit building, it is preferable that the main pipe pieces 51a that make up the vertical diagonal members 84 and upper pressure rods 85 be formed to a length that is an integer multiple of the long side of the building unit 2.

The pipe pieces 51a that make up the vertical diagonal members 84 and upper pressure bar 85 can be any length, but can also be made the same length as the pipe pieces 51a that make up the horizontal horizontal member 83. However, the lengths of the pipe pieces 51a that make up the horizontal horizontal member 83, vertical diagonal members 84, and upper pressure bar 85 can also be different from each other.

Furthermore, the length adjustment mechanism for the rod-shaped member 51 is not limited to the above, and various joint structures other than the screw-type joint 51b, extension structures using spigot joints, and telescopic structures using nested multiple cylinders may also be used. However, in terms of strength, using the screw-type joint 51b is most preferable in order to ensure the necessary wind resistance. Structurally, the screw-type joint 51b is also preferable as it is the simplest.

(B4) The rod-shaped member 51 may be installed by passing it through a rod-passing portion 52 (Figure 12) provided on the foundation cover 8.

Here, the rod-passing portion 52 is a cylindrical portion through which the rod-shaped member 51 passes, and at least one is provided on the foundation cover 8. The rod-passing portion 52 preferably has a diameter slightly larger than that of the rod-shaped member 51 and is a cylindrical body of approximately the same length as or slightly shorter than the rod-shaped member 51. The rod-passing portion 52 is preferably made of approximately the same material as the foundation cover 8. The rod-passing portion 52 is attached to the foundation cover 8 at the installation position of the rod-shaped member 51 so as to extend continuously in the installation direction of the rod-shaped member 51.

The foundation cover 8 may be a large, single piece that can simultaneously cover the entire foundation 3, but as mentioned above, in the case of a unit building, it is preferable to divide the foundation cover 8 into cover pieces 12 the size of each unit building. In this case, at least one rod-passing portion 52 should be provided for each cover piece 12 (Figure 7). In this embodiment, each cover piece 12 is provided with a rod-passing portion 52 for passing through and securing the vertical diagonal member 84 and upper pressure rod 85.

Note that no rod-passing portion 52 is provided for the horizontal member 83, but if necessary, a rod-passing portion 52 for the horizontal member 83 can be provided.

(B5) As shown in FIG. 7 (FIG. 8), the rod-passing portion 52 is
a lower surface through-portion 52a provided on the lower surface side of the foundation cover 8;
An upper surface through-portion 52 b may be provided on the upper surface side of the foundation cover 8 .
As shown in FIG. 8, the vertical diagonal member 84 may be installed on the underside of the foundation cover 8 through the underside through-portion 52a.
The upper pressure bar 85 may be installed on the upper surface side of the foundation cover 8 through the upper surface side through-portion 52b.

The lower-surface-side through-portion 52a passes the rod-shaped member 51 (vertical diagonal member 84) through the underside of the foundation cover 8, and secures the rod-shaped member 51 to the foundation cover 8. The lower-surface-side through-portion 52a is attached to the underside of the foundation cover 8 by sewing, welding, or other methods. The lower-surface-side through-portion 52a is located on the inner covering portion 14 of the cover piece 12, at a position between the second clamp portion 87 of the above-water fitting 81 and the third clamp portion 88 of the below-water fitting 82. The lower-surface-side through-portion 52a is formed to a length approximately equal to or shorter than the distance between the second clamp portion 87 and the third clamp portion 88.

The upper surface passing portion 52b passes the rod-shaped member 51 (upper pressure bar 85) through the upper side of the foundation cover 8, and secures the rod-shaped member 51 to the foundation cover 8. The upper surface passing portion 52b is attached to the upper surface of the foundation cover 8 by sewing or welding. The upper surface passing portion 52b is formed on the inner surface covering portion 14 of the cover piece 12 so that it is approximately the same length as or shorter than the short sides 3c and 3d of the foundation 3.

When the foundation cover 8 is divided into cover pieces 12 of the size of each unit building, each cover piece 12 is provided with two rod-passing sections 52 so that at least one vertical diagonal member 84 and one upper pressure rod 85 can be passed through.

Two rod-through portions 52 are installed on one side edge of the cover piece 12 (on the short side 3c side of the foundation 3) and one at the width center (or nearby). The rod-through portion 52 on one side edge is the underside portion 52a, through which the vertical diagonal member 84 is passed. The rod-through portion 52 on the width center is the upper side portion 52b, through which the upper pressure rod 85 is passed. However, for the cover piece 12 installed first, a rod-through portion 52 (underside portion 52a) for the vertical diagonal member 84 near the short side 3d of the foundation 3 is also installed on the other side edge (on the short side 3d side of the foundation 3).

The above-described foundation cover 8 installation structure is not limited to the foundation 3 of a unit building, but can also be applied to the foundation 3 of a general building 1.

<Function> The function of this embodiment is explained below.

Based on the installation structure of the foundation cover 8, the installation method for the foundation cover 8 is as follows:

(B1) As shown in Figure 5A (Figure 5B), the foundation 3 of the building 1 is covered from above with the foundation cover 8. At this time, the foundation cover 8 is held (to the foundation 3) by bolt members 71 protruding from the foundation 3 via mounting brackets 72 or rod-shaped members 51 attached to the mounting brackets 72.

(B2) As the mounting brackets 72, above-water fittings 81 (Figure 9) are installed on the above-water edge of the foundation 3, and below-water fittings 82 (Figure 10), which are lower than the above-water fittings 81, are installed on the below-water edge of the foundation 3. As the rod-shaped members 51, horizontal members 83 are arranged along the above-water edge and supported by the above-water fittings 81, and vertical diagonal members 84, which are approximately perpendicular to the horizontal members 83, are supported at a downward slope by the above-water fittings 81 and the below-water fittings 82. Using the mounting brackets 72 and rod-shaped members 51, the foundation 3 is diagonally covered from above with the foundation cover 8 so that the above-water side is higher and the below-water side is lower (installed in an inclined state). Then, upper pressure bars 85 (Figure 5A) parallel to the vertical diagonal members 84 are placed on the foundation cover 8 from above between the vertical diagonal members 84 to form drainage channels 89 in the foundation cover 8.

(B3) As shown in Figure 12, the rod-shaped member 51 is a member whose length can be adjusted. The rod-shaped member 51 can be attached to or detached from the foundation 3, foundation cover 8, etc., while adjusting its length depending on the situation.

(B4) Install the rod-shaped member 51 by passing it through the rod-passing portion 52 (Figure 12) provided on the foundation cover 8.

(B5) At this time, as shown in Figure 7 (Figure 8), the rod-through portion 52 is made up of a lower-side through-portion 52a provided on the underside of the foundation cover 8 and an upper-side through-portion 52b provided on the upper side of the foundation cover 8. As shown in Figure 8, the vertical diagonal member 84 is installed on the underside of the foundation cover 8 through the lower-side through-portion 52a. The upper pressure rod 85 is installed on the upper side of the foundation cover 8 through the upper-side through-portion 52b.

Furthermore, the method for temporarily waterproofing the building 1 using the foundation cover 8 is as follows:

(A1) The foundation 3 of the building 1 is covered from above with a cover member 11. At this time, the cover member 11 is divided to provide multiple cover pieces 12 that match the size of the building unit 2. Alternatively, the cover member 11 is composed of multiple cover pieces 12 that are formed to match the size of the building unit 2. Then, multiple cover pieces 12 are installed in a line on the foundation 3 according to the arrangement (installation position) of the building unit 2 (relative to the foundation 3).

(A2) As shown in Figure 7, the cover pieces 12 (placed side by side on the foundation 3) are connected to each other by connecting portions 32, 33 provided on the side edges located at the boundary portions 31 (e.g., Figure 3) between the building units 2. This allows the cover pieces 12 to become an integrated cover member 11.

(A3) As shown in Figure 8, the cover piece 12 is designed to be magnetically attracted to the building unit 2 by magnets 41 attached to its side edges. This eliminates gaps between the side edges of the cover piece 12 and the building unit 2, preventing rainwater from seeping in through the gaps.

(A4) When installing the cover piece 12 on the foundation 3, as shown in Fig. 5A (Fig. 5B), the cover member 11 is supported by a rod-shaped member 51 installed on the foundation 3 in an inclined state with one end higher than the other end (Fig. 6). Then, the rod-shaped member 51 is passed through a rod-passing portion 52 (Fig. 8) provided on the cover piece 12. Alternatively, the rod-shaped member 51 is held by the cover piece 12 by passing it through the rod-passing portion 52.
(A5) At this time, as shown in FIG. 6, the height h2 of one end of the cover member 11 from the foundation 3 is set higher than the carry-in height h3 of the underfloor equipment 61 installed within the foundation 3.

(A6) In the above, when installing the building units 2 in order on the foundation 3, the cover member 11 is used to float the building unit 2 to be installed above the foundation 3, and the cover piece 12 located below the floating building unit 2 is removed (by flipping it over, etc.). This prevents rainwater from entering the foundation 3 from the area where the cover piece 12 has been removed.

(A7) After installing the building unit 2 in the position where the cover piece 12 was removed, a magnet 41 is attached to the side edge of another cover piece 12 that was adjacent to the removed cover piece 12, and the side edge is magnetically attached to the installed building unit 2.

(A8) The cover pieces 12 have overlapping portions 18, 19 on their side edges. Then, the cover pieces 12 are installed on the foundation 3 with their side edges overlapping (with overlapping portion 18 overlapping overlapping portion 19) in order from the latest to the earliest building unit 2 installation order. Conversely, the cover pieces 12 are removed from the foundation 3 in order from the earliest to latest building unit 2 installation order.

(A9) When installing a building unit 2 on the foundation 3, the top surface of the building unit 2 is (previously) covered with a temporary rainproof sheet 7, and when another building unit 2 is installed next to the building unit 2, the temporary rainproof sheets 7 on the top surfaces of the adjacent building units 2 are connected to each other.

(A10) When installing the building unit 2 of the upper floor H on top of the building unit 2, the building unit 2 of the upper floor H is floated above the building unit 2, and the temporary rainproof sheet 7 located underneath the floating building unit 2 of the upper floor H is removed (by flipping it over, etc.).

(A11) The temporary rainproofing sheet 7 is formed with upper side cover portions 7a that cover the upper parts of the side surfaces of the building unit 2. The upper side cover portions 7a of adjacent temporary rainproofing sheets 7 are bent upward, and the upper side cover portions 7a are connected to each other, and the connected upper side cover portions 7a are folded in half while still connected.

(A12) As described above, horizontal horizontal members 83 extending along the above-water side (long side 3a) of the foundation 3 of the unit building (building 1) are attached via above-water fittings 81 to bolt members 71 protruding from at least the above-water side (long side 3a). The foundation 3, with the horizontal horizontal members 83 installed so that they are higher than the above-water side (long side 3a), is then diagonally covered from above with a foundation cover 8. The peripheral edges of the foundation cover 8 are fixed to the ground with string-like members 21 and pegs 24, and are also fixed to the bolt members 71 protruding from the foundation 3 or to fixing fittings 91 attached to the bolt members 71. In this state, the method for removing the foundation cover 8 involves removing the string-like members 21, pegs 24, fixing fittings 91, and the portion of the horizontal horizontal member 83 where the first building unit 2 will be installed just before installing the first building unit 2 on the foundation 3.

Below, we will explain in more detail how to use the foundation cover 8, including how to install and remove it.

(How to install Foundation Cover 8)

The foundation cover 8 is installed on top of the foundation 3 so that it covers the entire foundation 3. The work flow for this is explained below.

First, as shown in Figure 13, mounting brackets 72 and the like are attached to the bolt members 71 of the foundation 3 (mounting bracket installation process).

At this time, above-water fittings 81 are attached to the above-water side (long side 3a) of the foundation 3, and below-water fittings 82 are attached to the below-water side (long side 3b). Fixing fittings 91 are also attached to the other sides (short sides 3c, 3d). The fixing fittings 91 are adjusted to be approximately the same height as the adjacent parts of the vertical diagonal members 84. Adjustment can be made at the time of installation, or after the vertical diagonal members 84 have been installed.

In the case of a unit building, bolt members 71 (anchor bolts) are installed at least at or near the four corners of each building unit 2 at the installation position of each building unit 2 on the foundation 3. Therefore, at the boundary 31 between adjacent building units 2, two bolt members 71 for adjacent building units 2 are installed side by side relatively close to the long sides 3a, 3b of the foundation 3. In this case, the mounting fittings 72 (underwater fitting 82 and abovewater fitting 81) are attached to one of the two bolt members 71.

In this embodiment, of the four bolt members 71 provided at the installation position of each building unit 2 relative to the foundation 3, mounting brackets 72 are attached to the two bolt members 71 located on the side of the building unit 2 that is installed first (in this embodiment, on the short side 3c side). Mounting brackets 72 are generally not attached to the remaining two bolt members 71. Therefore, of the two bolt members 71 installed side by side at the boundary 31, the one located on the short side 3d side is used to attach the mounting bracket 72.

For the building unit 2 that is to be installed last, attach the mounting brackets 72 to the bolt members 71 at all four corners.

The mounting brackets 72 are attached in pairs, consisting of an above-water bracket 81 and an below-water bracket 82.

Then, the rod-shaped member 51 is installed above the foundation 3 using the mounting bracket 72 attached to the bolt member 71 (first support rod installation process).

First, horizontal members 83 are installed approximately horizontally between the upper ends of the above-water fittings 81, and all of the above-water fittings 81 are connected by the horizontal members 83. The horizontal members 83 may be connected in advance to make them longer before installation, or they may be installed while being connected and made longer. The horizontal members 83 are installed at a relatively high position above the above-water edge of the foundation 3.

After the horizontal members 83 are installed above the foundation 3, as shown in Figure 14, the foundation cover 8 is placed on top of the horizontal members 83 and placed on top of the foundation 3. This allows the shape of the foundation cover 8 to be maintained by both ends of the horizontal members 83, with the abovewater side extending in the direction of the long side 3a of the foundation 3 and able to cover the short sides 3c and 3d of the foundation 3.

In this case, the foundation cover 8 is installed so that the inner surface covering portion 14 covers one side of the foundation 3, and the side surface covering portion 16 covers the long sides 3a and 3b of the foundation 3. The first and last cover pieces 12 are installed so that the side surface covering portion 17 covers the short sides 3c and 3d of the foundation 3.

The foundation cover 8 may be installed by connecting multiple cover pieces 12 in advance to create an enlarged structure, or, as shown in Figure 15, cover pieces 12 corresponding to the position of each building unit 2 may be installed individually, and then the cover pieces 12 may be connected together later using connecting parts 32, 33 to create an enlarged structure.

When connecting each cover piece 12 later, the cover pieces 12 are installed in order from the latest side of the building unit 2 in the installation order (in this example, the side of the short side 3d of the foundation 3) to the earliest side. The cover pieces 12 are installed one by one in order so that a portion of the adjacent side edge (overlapping portion 18) overlaps the side edge (overlapping portion 19) of the previously installed cover piece 12 (see Figure 8).

As each cover piece 12 is installed, the diagonal member 84 is passed through the rod-through portion 52 (underside through portion 52a) to integrate the diagonal member 84 and cover piece 12, and the diagonal member 84 maintains the shape of one side edge in a straight, stretched state. The diagonal member 84 is then fixed at both ends to the above-water fittings 81 and below-water fittings 82, supporting the diagonal member 84 at a downward slope. As a result, the above-water and below-water sides of the cover piece 12's portion covering the inside of the foundation 3 (inner surface covering portion 14) are expanded by both ends of the diagonal member 84 in the extension directions of the short sides 3c and 3d, respectively.

As a result of the above steps, the cover piece 12 expands downward from the above-water side to the below-water side, creating a base shape that prevents rainwater from accumulating on the cover piece 12 (second support rod installation process).

The cover piece 12 may be installed on the foundation 3 after first passing the vertical diagonal member 84 through the rod-passing portion 52 (underside passing portion 52a). This allows the cover piece 12 to be turned over so that the underside is facing up, and then the vertical diagonal member 84 can be passed through the upper rod-passing portion 52, making the rod-passing process easier.

The vertical diagonal members 84 may be connected and lengthened in advance, then passed through the rod-passing section 52 (underside passing section 52a) and fixed at both ends to the above-water fittings 81 and below-water fittings 82, or they may be connected and lengthened before being passed through the rod-passing section 52 and fixed at both ends to the above-water fittings 81 and below-water fittings 82.

After all cover pieces 12 installed on the foundation 3 have been secured with the vertical diagonal members 84, adjacent cover pieces 12 are joined together at their overlapping side edges with the connecting members 32, 33, as described above. This makes it less likely for rainwater to leak between the side edges of adjacent cover pieces 12.

If the connecting portion 32 is a zipper, fasten the zipper to one side of the cover piece 12 (e.g., the underwater side) and pull the lead string 32c from the other side (e.g., the abovewater side). This allows the cover piece 12 (its inner covering portion 14) to be connected with the zipper without having to enter the foundation 3. It is preferable to return the tip of the lead string 32c to one side (e.g., the belowwater side) after connection.

If the connecting portion 33 is a hook-and-loop fastener, the hook-and-loop fastener can be joined simply by overlapping the side edges of adjacent cover pieces 12 (side covering portions 16) and pressing them together from above. The connecting portion 33 (hook-and-loop fastener) between the same cover pieces 12 (side covering portions 16 and 17) can also be connected at the appropriate time in the same way.

As shown in Figures 16 and 17, once the cover pieces 12 are connected to form a single foundation cover 8, the upper pressure rod 85 is installed on top of the foundation cover 8 (third support rod installation process). In this embodiment, the upper pressure rod 85 is inserted from the above-water side to the below-water side, but it can be inserted from either side.

The upper pressure bar 85 may be connected and lengthened before being passed through the rod-passing section 52 (upper surface side passing section 52b), or it may be connected and lengthened before being passed through the rod-passing section 52 (upper surface side passing section 52b). This allows the upper pressure bar 85 and cover piece 12 to be integrated.

In addition, the above-water end of the upper pressure bar 85 is positioned above the horizontal member 83, and the below-water end is positioned above the top surface of the foundation 3 (long side 3b).

In this way, by placing the upper pressure bar 85 on top of the cover piece 12, the cover piece 12 is depressed downward due to its weight, and changes from the state shown in Figure 17 to a state with a steeper downward slope than the vertical diagonal member 84, as shown in Figure 18.

At this time, the cover piece 12 is pressed down from above by the weight of the upper pressure bar 85, causing it to be depressed downward around the position of the upper pressure bar 85, increasing the overall tension. In particular, the underwater side of the cover piece 12 is held at the upper end of the underwater fitting 82 by the vertical diagonal member 84, and is lowered by the upper pressure bar 85 to a position above the foundation 3 or slightly above it, making it lower than the underwater fitting 82, resulting in a relatively large peak-valve shape.

As a result, a drain groove 89 with a downward slope that runs along the upper pressure bar 85 is formed in the cover piece 12 between the vertical diagonal members 84. This drain groove 89 gradually becomes larger and deeper from the above-water side to the below-water side.

Then, as shown in Figure 19, while checking and adjusting the tension of the foundation cover 8, fasten each part of the periphery of the foundation cover 8 (the positions of the mounting holes 22) to the rod-shaped member 51, the mounting bracket 72, the fixing bracket 91, and the bolt member 71 of the foundation 3 using a string-like member 21 such as a band.

When fixing the rod-shaped member 51 or the upper pressure bar 85 to the foundation cover 8, a string-shaped member 21 such as a band may be directly wrapped around and fastened. Alternatively, as shown in Figure 17(b), a cap 95 with a through hole 95a may be attached to the end of the rod-shaped member 51, and the band or other string-shaped member 21 may be passed through the mounting hole 22 of the foundation cover 8 using the through hole provided in the cap 95 to fasten it.

Furthermore, to prevent the peripheral edge of the foundation cover 8 from flapping in the wind, the peripheral edge may be additionally secured to the ground using a string-like member 21 such as a band and pegs 24. The pegs 24 should be driven as close to the foundation 3 as possible.

Finally, it is preferable to perform a water resistance test by pouring water on the foundation cover 8.

This completes the installation of the foundation cover 8 on the foundation 3. The foundation cover 8 is then firmly fixed to the bolt members 71 of the foundation 3 via mounting brackets 72 or rod-shaped members 51, thereby reliably preventing the foundation cover 8 from being blown away by the wind.

(How to remove foundation cover 8)

Next, we will explain how to install the building unit 2 on the foundation 3 during rainfall and how to remove the foundation cover 8 at that time.

Normally, the building unit 2 is not installed on the foundation 3 during rainfall, but in this embodiment, the building unit 2 can be installed even during rainfall.

Before installing the building unit 2, check that no rainwater has accumulated on the foundation cover 8. If rainwater has accumulated on the foundation cover 8, forcibly drain the accumulated rainwater, for example, using a pump (rainwater removal process).

First, the bands and other string-like members 21 and pegs 24 that secure the foundation cover 8 to the ground, bolt members 71, fixing brackets 91, mounting brackets 72, rod-shaped members 51, etc. are removed from each part of the periphery of the foundation cover 8, thereby releasing the periphery of the foundation cover 8 from its fastened state (periphery release process). If it is not raining, the entire foundation cover 8 can be removed in one go. This work is performed immediately before installing the first building unit 2 on the foundation 2. "Immediately before installing the first building unit 2" preferably refers to the period from around the time the first building unit 2 arrives at the construction site on the day of installation until the first building unit 2 is hoisted onto the foundation 2.

The building units 2 are then installed one by one in order in the installation direction 5, from the short side 3c to the short side 3d on the foundation 3. At this time, as shown in Figure 20, only the upper pressure rod 85 and rod-shaped members 51 (part of the horizontal member 83 and the vertical diagonal member 84) installed in the position on the foundation 3 where the building unit 2 will be installed are removed from the foundation 3. In addition, the mounting brackets 72 (underwater brackets 82, abovewater brackets 81) installed in that area are also removed from the foundation 3. If fixing brackets 91 are present in that area, they are also removed (partial removal process for rod-shaped members, etc.). The rod-shaped members 51 and mounting brackets 72 are left in place on the other parts of the foundation 3.

At this time, the upper pressure bar 85 should be completely pulled out of the rod-passing portion 52. The upper pressure bar 85 may also be removed by pulling the entire bar out of the rod-passing portion 52 (upper surface side passing portion 52b) in one go. Alternatively, the upper pressure bar 85 may be removed by removing the screw joint 51b while pulling it out of the rod-passing portion 52 and disassembling it into short pipe pieces 51a. It is not necessary to disassemble the upper pressure bar 85 into individual pipe pieces 51a; it is most efficient to disassemble it into pieces long enough that they do not extend beyond the site, and this also shortens the work time (the same applies to the other rod-shaped members 51).

The vertical diagonal member 84 will come off the foundation 3 if it is removed from the mounting bracket 72 (underwater bracket 82, abovewater bracket 81), so it can be left in the rod-through portion 52 (underside through portion 52a).

The horizontal member 83 can be removed in any way as long as only the portion where the building unit 2 is to be installed can be removed. For example, the horizontal member 83 can be disassembled at a single screw joint 51b between the portion to be removed and the remaining portion, and the portion to be removed can be pulled out from the side of the building unit 2 that was installed earlier (in this embodiment, the side of short side 3c). Conversely, for example, the horizontal member 83 can be pulled out from the side of the building unit 2 that was installed later (in this embodiment, the side of short side 3d) by the length of one short side 3c, 3d of the building unit 2. On the side of short side 3d, the portion of the horizontal member 83 pulled out from the mounting bracket 72 (surface mounting bracket 81) is disassembled into pipe pieces 51a and removed. In this case, loosen the clamps 74 of all of the surface mounting brackets 81 to allow the horizontal member 83 to slide within the clamps 74. Alternatively, the part to be removed can be disassembled at a single screw joint 51b between the part to be removed and the part to be left in place, and then the part to be removed can be separated into two parts by disassembling it at a single screw joint 51b located in the middle of the part to be removed, and each part can be pulled out inward. For parts where the building unit 2 has not yet been installed, the horizontal members 83 can be left on the foundation 3.

Then, as described above, the mounting bracket 72 and fixing bracket 91 from which the rod-shaped member 51 was removed are removed from the bolt member 71 and collected.

Once this state is reached, the building unit 2 is lifted with a crane and temporarily held in a floating position directly above the installation position on the foundation 3, as shown in Figure 21(a) (partial removal process of rod-shaped members, etc.). The building unit 2 should be floated at a height that is neither too high nor too low, and is appropriate for removing the cover piece 12.

In this state, only the cover piece 12 under the floating building unit 2 of the foundation cover 8 is flipped up toward the short side 3d of the foundation 3 and temporarily placed so that it overlaps the adjacent cover piece 12 (cover piece removal process). Then, as shown in Figure 21(b), the building unit 2 is installed on top of the part of the foundation 3 that was covered by the flipped cover piece 12 (or the part from which the cover piece 12 has been removed) (building unit installation process).

At this time, the magnets 41 attached to the side edge (or overlapping portion 19) of the adjacent cover piece 12 on the building unit 2 side are attached to the bottom (floor beam 2c) of the installed building unit 2, quickly sealing the gap between the bottom of the side of the building unit 2 and the side edge of the adjacent cover piece 12 (side edge attraction process). The magnets 41 are attached at a position higher than the vertical diagonal members 84.

Once the building unit 2 has been installed in this way, preparations are made to install the next building unit 2. During this time, as shown in Figure 22A (a), the connecting parts 32, 33 between the turned-over cover piece 12 and the adjacent cover piece 12 are released, and the turned-over cover piece 12 is separated from the adjacent cover piece 12 (cover piece separation process). The adjacent cover piece 12 is left as it is on the foundation 3.

If the connecting portion 32 is a zipper, the zipper can be released and the flipped-up cover piece 12 can be separated by pulling the lead string 32c from one side of the cover piece 12 (e.g., the underwater side) without entering the foundation 3.

If the connecting portion 33 is a hook-and-loop fastener, the side edges (of the side covering portion 16) of the cover piece 12 are pulled apart. The hook-and-loop fastener on the side covering portion 16 may be peeled off when the cover piece 12 is flipped over.

If the vertical diagonal member 84 remains in the rod-through portion 52 of the flipped cover piece 12, as shown in Figure 22A (b), after flipping the cover piece 12 or after separating the cover piece 12, the vertical diagonal member 84 is pulled out from the rod-through portion 52 of the cover piece 12. In this embodiment, the vertical diagonal member 84 is pulled out toward the underwater side, but it can be pulled out toward either side. The method for pulling out the vertical diagonal member 84 is the same as for the upper pressure bar 85 described above. The reason for leaving the vertical diagonal member 84 on the cover piece 12 until the cover piece 12 is flipped is that the cover piece 12 can be flipped over quickly and neatly by holding and operating the vertical diagonal member 84.

After the cover piece 12 is separated and the diagonal member 84 is removed, it is folded over the remaining base cover 8 as shown in Figure 22B, and then rolled up and collected (cover piece collection process).

From then on, the above will be repeated in order until installation of all building units 2 on the lower floors L is complete.

As a result, even during rainfall, the building unit 2 on the lower floor L can be installed without getting the inside of the foundation 3 wet, and the foundation cover 8 can be removed efficiently from the foundation 3.

The following explains how to connect and remove the temporary rainproofing sheet 7.

(About connecting temporary rainproofing sheet 7)

Next, when installing the building units 2 of the lower floor L adjacent to each other on the foundation 3, the adjacent upper side cover portions 7a (Figure 23A(a)) of the temporary weatherproofing sheet 7 (previously attached) to the top surface of the building unit 2 of the lower floor L are folded upward (Figure 23A(b)), and the back surfaces of the upper side cover portions 7a are aligned and connected by the second connecting portion 7c (upper side cover portion connecting step, Figure 23B(a)).

The connected upper side cover portion 7a is folded in half along the folding assist line 7d, with the upper edge of the upper side cover portion 7a facing downward and hidden inside the folded upper side cover portion 7a (folding process, Figure 23B (b)). This prevents rainwater from seeping in between the upper side cover portions 7a from the (top) edge of the upper side cover portion 7a.

Then, fold the folded upper side cover part 7a toward the adjacent temporary waterproofing sheet 7 so that it is laid almost flat (Figure 23C(a)). If necessary, secure the laid upper side cover part 7a to scaffolding or the like using a binding member such as a band (Figure 23C(b)).

The above process is then repeated until all of the building units 2 on the lower floor L have been installed on the foundations 3. This connects and integrates all of the temporary waterproofing sheets 7, and the top surfaces of the building units 2 on the lower floor L are temporarily waterproofed.

(Regarding removal of temporary rainproofing sheet 7)

Next, the building units 2 for the upper floor H are placed on top of the building units 2 for the lower floor L, starting from the edge (Figure 4A). At this time, the building units 2 for the upper floor H are temporarily held in a floating state above the building units 2 for the lower floor L, and the building units 2 for the upper floor H cover the building units 2 for the lower floor L.

Then, the temporary waterproofing sheet 7 located under the floating building unit 2 of the upper floor H is flipped up and removed, such as by temporarily placing it on top of the adjacent temporary waterproofing sheet 7, and the building unit 2 of the upper floor H is installed in the flipped-up area (Figure 23D(a)). The flipped-up temporary waterproofing sheet 7 is then separated from the adjacent temporary waterproofing sheet 7, folded, collected, and reused. The adjacent temporary waterproofing sheet 7 is left in its original state on top of the building unit 2 of the lower floor L, and its upper side cover portion 7a is folded in half in the opposite direction from the above and placed toward the installed building unit 2 of the upper floor H, attaching it to the building unit 2 of the upper floor H (Figure 23D(a)). If necessary, the attached upper side cover portion 7a can be secured to scaffolding using a binding material such as a band. This eliminates the gap between the building unit 2 of the upper floor H and the upper side cover portion 7a of the adjacent temporary waterproofing sheet 7, preventing rainwater from seeping in.

The above process is then repeated until all building units 2 for the upper floor H are installed on top of the building units 2 for the lower floor L. This efficiently removes all of the temporary weatherproofing sheets 7, allowing the building units 2 for the upper floor H to be installed on top of the building units 2 for the lower floor L while preventing rainwater from seeping in.

<Effects> This embodiment provides the following effects:

The effects of the foundation cover 8 are explained below.

(Effect A1) In the foundation cover 8, the cover member 11 may be provided in a divided state, with cover pieces 12 having portions of approximately the same size and shape as the building units 2. A plurality of these cover pieces 12 are installed side by side on the foundation 3 in accordance with the arrangement and orientation of the building units 2. Then, when installing the building units 2 on the foundation 3 using a crane, only the cover piece 12 installed on the portion of the foundation 3 where the building units 2 will be installed is flipped up to expose that portion of the foundation 3.

This work is performed by floating the building unit 2 above the part of the foundation 3 where it will be installed, protecting that part from rainwater. Furthermore, the other cover pieces 12 are left covering the other parts of the foundation 3 (parts that will not be installed).

Then, the cover pieces 12 are flipped over to expose the foundation 3, and the building units 2 are installed on the exposed areas. The flipped cover pieces 12 are then removed, folded, and collected. After that, the building units 2 are installed in the same manner, flipping over the cover pieces 12 one by one in order.

By doing this, even during rainfall, the building unit 2 can be installed while preventing rainwater from entering the foundation 3 from other locations.

In addition, when the building unit 2 reaches the location where it is to be installed, the cover piece 12 underneath is flipped up while the building unit 2 is floating above the foundation 3. This makes it difficult for rainwater to enter the foundation 3 through the flipped-up portion of the cover piece 12. As a result, the cover piece 12 can be removed while effectively preventing rainwater from seeping in overall.

Furthermore, by dividing the cover member 11 into multiple cover pieces 12, each cover piece 12 can be handled individually, making handling much easier than if the cover member 11 were made from a single large member.

(Effect A2) In the foundation cover 8, the side edges of the cover pieces 12 located at the boundaries 31 between the building units 2 may be provided with connecting portions 32, 33. This allows the cover pieces 12 to be arranged closely together on the foundation 3 in accordance with the arrangement of the building units 2, and adjacent cover pieces 12 can be easily connected and integrated using the connecting portions 32, 33. Conversely, the cover pieces 12 can be easily separated (from an integrated state) by removing the connecting portions 32, 33. By connecting the cover pieces 12 to each other using the connecting portions 32, 33, the cover pieces 12 can more effectively suppress and prevent rainwater from seeping in through the gaps between them.

In this case, for example, the connecting portions 32, 33 can be used as fasteners, and the lead string can be tied to the slider 32b of the fastener and guided to the opposite side of the slider 32b. This allows the fastener to be engaged on one side of the cover piece 12 and the lead string 32c to be pulled from the other side, making it easy to join the fasteners (connect the cover pieces 12) without having to enter the foundation 3. Furthermore, after connection, by guiding the lead string to the opposite side (one side) of the slider 32b of the cover piece 12, the fastener can be easily removed (the cover pieces 12 can be separated) without having to enter the foundation 3 by pulling the lead string 32c from one side.

Furthermore, for example, by using hook-and-loop fasteners for the connecting portions 32, 33, the hook-and-loop fasteners can be easily joined without entering the foundation 3 by simply overlapping and pressing the side edges of the cover pieces 12 together. Conversely, the hook-and-loop fasteners can also be easily removed.

(Effect A3) In the foundation cover 8, the cover member 11 may be provided with magnets 41 on its side edges. After the building unit 2 is installed on the foundation 3, the magnets 41 provided on the side edges of the cover member 11 are used to attract and fix the side edges of the cover member 11 to the bottom of the building unit 2 immediately after installation. The magnets 41 are used on the side edges of the cover pieces 12 adjacent to the installed building unit 2, of the cover members 11 remaining on the foundation 3, that are close to the building unit 2. This makes it possible to quickly seal the gap between the installed building unit 2 and the cover member 11 immediately after installation of the building unit 2, preventing rainwater from entering through the gap.

(Effect A4) In the foundation cover 8, the cover member 11 may be supported by the rod-shaped member 51 in an inclined state with one end higher than the other end relative to the foundation 3. This allows rainwater to drain naturally from above the inclined cover member 11 to the outside of the foundation 3. This prevents rainwater from accumulating on the cover member 11.

The cover member 11 can be supported in an inclined position simply by placing it over the top of a rod-shaped member 51 (horizontal horizontal member 83) installed above one side of the foundation 3 (e.g., long side 3a).

The cover member 11 is provided with a rod-through portion 52, which allows the cover member 11 to be integrated with the rod-shaped member 51 (vertical diagonal member 84 or upper pressure bar 85) simply by passing the rod-shaped member 51 through the rod-through portion 52. The rod-shaped member 51 then maintains the cover member 11 in a straight, stretched state. Therefore, the rod-shaped member 51 can stably hold the cover member 11 in an inclined state.

By integrating the rod-shaped member 51 (vertical diagonal member 84) through the rod-through portion 52 of the cover member 11, the wind pressure acting on the cover member 11 can be transmitted to the rod-shaped member 51, and then from the rod-shaped member 51 to the foundation 3 via the fixing bracket 91 and anchor bolt.

(Effect A5) In the foundation cover 8, the cover member 11 may be installed so that the height h2 of one end from the foundation 3 is higher than the delivery height h3 of the underfloor equipment 61. This makes it possible to deliver the underfloor equipment 61 into the foundation 3 at any time, even after the cover member 11 has been installed on the foundation 3, before the building unit 2 is installed.

In addition, by utilizing the space below one end of the raised cover member 11, it is possible to install insulation material 9 (foundation insulation material) on the inside of the foundation 3 or perform pre-piping, even with the cover member 11 in place.

(Effect A6) As described above, when the building units 2 are installed in order on the foundation 3, the cover member 11 is removed by removing the cover piece 12 located below the floating building unit 2 while the building unit 2 to be installed is floating above the foundation 3. In this way, by removing the cover member 11 from below the floating building unit 2, the lower part of the foundation 3 can be prevented from getting wet with rainwater.

(Effect A7) After installing a building unit 2 in the area where a cover piece 12 has been removed, a magnet 41 attached to the side edge of another cover piece 12 adjacent to the removed cover piece 12 magnetically attaches the side edge to the installed building unit 2. This quickly seals the gap between the building unit 2 and the side edge of the other cover piece 12, preventing rainwater from entering.

(Effect A8) Overlapping portions 18, 19 are provided on the side edges of the cover pieces 12, and the cover pieces 12 are installed on the foundation 3 with the side edges overlapping (with the overlapping portion 18 overlapping the overlapping portion 19) in order from the latest to the earliest building unit 2 installation order, and the cover pieces 12 are removed in order from the earliest to latest building unit 2 installation order. This allows the cover pieces 12 to be installed and removed efficiently on the foundation 3.

(Effect A9) When installing a building unit 2 on the foundation 3, the top surface of the building unit 2 is covered with a temporary rainproof sheet 7. When another building unit 2 is installed next to the building unit 2, the temporary rainproof sheets 7 on the top surfaces of adjacent building units 2 are connected together. This makes it possible to temporarily waterproof the top surfaces of the building units 2 with the temporary rainproof sheet 7. By connecting the temporary rainproof sheets 7 together, the temporary rainproof sheets 7 are integrated, preventing rainwater from seeping in between the temporary rainproof sheets 7.

(Effect A10) When installing the building unit 2 of the upper floor H on top of the building unit 2, the building unit 2 of the upper floor H is floated above the building unit 2, and the temporary rainproof sheet 7 located underneath the floating building unit 2 of the upper floor H is removed. In this way, by removing the temporary rainproof sheet 7 from underneath the floating building unit 2 of the upper floor H, the top surface of the lower building unit 2 can be prevented from getting wet with rainwater.

(Effect A11) Upper side cover portions 7a that cover the upper parts of the sides of the building units 2 are formed on the temporary rainproofing sheets 7. The upper side cover portions 7a of adjacent temporary rainproofing sheets 7 are then bent upward to connect the upper side cover portions 7a, and the connected upper side cover portions 7a are folded in half while still connected. By folding the connected upper side cover portions 7a in half in this way, the ends of the upper side cover portions 7a are hidden inside, preventing rainwater from seeping in between the temporary rainproofing sheets 7 without using any special sealing materials or sealing structures.

(Effect A12) The foundation cover 8 can be removed by removing the string-like members 21, pegs 24, fixing brackets 91, and horizontal members 83 on the periphery of the foundation cover 8, which are used to install the first building unit 2. This releases the periphery of the foundation cover 8, preparing it for removal from the foundation 3. By performing this preparation work immediately before installing the first building unit 2 on the foundation 3, the preparation work and the actual removal of the foundation cover 8 become a continuous process, eliminating unnecessary work. It also shortens the time from preparation work to the start of removal work, improving setup. Furthermore, improved work setup reduces the amount of rainwater that seeps into the foundation 3 through the gap between the foundation cover 8 and the building unit 2. Furthermore, improved work setup allows work to proceed smoothly, even in adverse working conditions such as rainy weather, reducing the occurrence of errors.

The effects of the foundation cover 8 installation structure are explained below.

(Effect B1) In the installation structure of the foundation cover 8, the foundation cover 8 may be held by bolt members 71 protruding from the foundation 3 via mounting brackets 72 or rod-shaped members 51. This allows the bolt members 71 attached to the foundation 3 to be used to firmly hold the foundation cover 8 to the foundation 3. This reliably prevents the foundation cover 8 from being blown away by the wind, improving the wind resistance of the foundation cover 8 installed on the foundation 3. Furthermore, by making effective use of the bolt members 71 attached to the foundation 3, the installation structure of the foundation cover 8 can be simplified, eliminating the need for a large-scale structure such as a separate installation structure from the foundation 3.

(Effect B2) In the installation structure of the foundation cover 8, the mounting bracket 72 may include an above-water bracket 81 installed on the above-water edge of the foundation 3, and an below-water bracket 82 installed on the below-water edge of the foundation 3. The above-water bracket 81 may be higher than the below-water bracket 82. The rod-shaped member 51 may include a horizontal member 83 arranged along the above-water edge and supported approximately horizontally by the above-water bracket 81, and a vertical diagonal member 84 arranged perpendicular to the horizontal member 83 and supported at a downward slope toward the below-water side by the above-water bracket 81 and the below-water bracket 82.

This allows the above-water fittings 81 to install the horizontal member 83 at a high position along the above-water edge. Furthermore, the above-water fittings 81 and below-water fittings 82 allow the vertical diagonal member 84 to be installed perpendicular to the horizontal member 83, at a downward slope.

Then, the foundation cover 8 is installed on top of the foundation 3 so as to cover it. As a result, the abovewater side of the foundation cover 8 is raised by the abovewater ends of the abovewater fittings 81, horizontal members 83, and vertical diagonal members 84, and the belowwater side is lowered by the belowwater ends of the belowwater fittings 82 and vertical diagonal members 84. The vertical diagonal members 84 then allow the foundation cover 8 to be tensioned in a state where its shape is maintained at a downward slope from abovewater to belowwater.

The installation structure of the foundation cover 8 may also include an upper pressure bar 85 that is arranged parallel to the vertical diagonal members 84 at a position between the vertical diagonal members 84 and placed on the foundation cover 8 from above.

Then, the upper pressure bar 85 is placed on top of the foundation cover 8 at a position between the vertical diagonal members 84. This causes the weight of the foundation cover 8 to dent the portion where the upper pressure bar 85 is placed, making the foundation cover 8 more taut and forming a drain groove 89 on top of the foundation cover 8. The upper pressure bar 85 and vertical diagonal members 84 give the underwater edge of the foundation cover 8 a peak-valley shape, with the vertical diagonal members 84 positioned higher and the upper pressure bar 85 positioned lower, clearly forming the drain groove 89.

(Effect B3) In the installation structure of the foundation cover 8, the rod-shaped member 51 may be made adjustable in length. This makes the rod-shaped member 51 easier to handle, and allows it to be easily maneuvered regardless of the site conditions.

(Effect of screw joint 51b)

Specifically, at least one of the rod-shaped members 51 may be configured so that multiple pipe pieces 51a can be connected and separated via screw-type joints 51b. This allows the length of rod-shaped members 51, such as the horizontal members 83, vertical diagonal members 84, and upper pressure bar 85, to be adjusted in units of the length of the pipe pieces 51a. Furthermore, by configuring the pipe pieces 51a to be connected and separated using screw-type joints 51b, the rod-shaped members 51 can ensure high wind resistance.

The rod-shaped members 51, which are the horizontal members 83, vertical diagonal members 84, and upper pressure rods 85 and can be connected and separated using screw joints 51b, are made up of multiple pipe pieces 51a. Therefore, by separating the pipe pieces 51a, the rod-shaped members 51 can be easily handled during transportation, installation, removal, etc., and can be easily handled regardless of the site conditions.

In other words, the lengths of the horizontal members 83, vertical diagonal members 84, and upper pressure rod 85 can be adjusted by connecting the pipe pieces 51a with screw joints 51b. Therefore, the rod-shaped members 51 can be used for foundations 3 of various sizes.

When installing the building units 2 on the foundation 3, the horizontal members 83, vertical diagonal members 84, and upper pressure rods 85 can be shortened or removed by removing the pipe pieces 51a at the screw joints 51b for each building unit 2, making them easy to work with and convenient.

(Effect B4) In the installation structure of the foundation cover 8, the rod-shaped member 51 may be installed by passing it through the rod-passing portion 52 provided on the foundation cover 8. In this way, by passing the rod-shaped member 51 through the rod-passing portion 52, the foundation cover 8 is placed in a taut state and its shape is maintained.

Then, by passing the rod-shaped member 51 through the rod-passing portion 52, the foundation cover 8 and the rod-shaped member 51 are integrated. This ensures that the wind pressure received by the foundation cover 8 is transmitted reliably to the rod-shaped member 51 via the rod-passing portion 52.

Furthermore, by fixing the rod-shaped member 51 to the foundation 3 via the mounting bracket 72 and bolt member 71, the foundation cover 8 is indirectly attached to the foundation 3. Therefore, the force transmitted to the rod-shaped member 51 is transmitted to the foundation 3 via the mounting bracket 72 and bolt member 71.

(Effect B5) In the installation structure of the foundation cover 8, the rod-through portion 52 may include a lower-side through-portion 52a provided on the underside of the foundation cover 8 and an upper-side through-portion 52b provided on the upper side of the foundation cover 8. The vertical diagonal member 84 may be installed on the underside of the foundation cover 8 through the lower-side through-portion 52a, and the upper pressure rod 85 may be installed on the upper side of the foundation cover 8 through the upper-side through-portion 52b.

In this way, by passing the vertical diagonal members 84 through the lower surface side through-holes 52a and the upper pressure rods 85 through the upper surface side through-holes 52b, each rod-shaped member 51 can be easily and reliably set in the correct position relative to the foundation cover 8. Then, by simply passing the rod-shaped members 51 through the designated rod-through holes 52, the rod-shaped members 51 and foundation cover 8 can be reliably assembled on the foundation 3 in a short amount of time with minimal effort.

The vertical diagonal member 84 supports the foundation cover 8 from below, and the upper pressure bar 85 holds the foundation cover 8 from above.

<Variations>

Modified examples of the foundation cover 8 are described below. Figures 24A to 24E show modified examples of the foundation cover 8.

This modified foundation cover 8 shown in Figure 24A is used when multiple building units 2 of the same size and shape are installed on a foundation 3. Note that Figure 24A(a) shows a case where four building units 2 are installed, and Figure 24A(b) shows a case where three building units 2 are installed.

In this modified example, the foundation cover 8 has cover pieces 12 that are symmetrical in the width direction. Two types of cover pieces 12 with such a symmetrical structure are available: a narrow-width N cover piece 12 (Figure 24B) and a wide-width W cover piece 12 (Figure 24C).

In addition, all or part (lower part) of the side covering portion 17 is constructed separately from the cover piece 12, making it detachable from the cover piece 12.

Of these, only one cover piece 12 with a narrow width N shown in Figure 24B is used initially. Furthermore, the cover piece 12 with a wide width W shown in Figure 24C is used for all subsequent cover pieces (until the end).

The narrow-width N cover piece 12 in Figure 24B is installed at the bottom, so it has a narrower width than the others. The wide-width W cover piece 12 in Figure 24C is installed on top of the other, so it has a wider width than the narrow-width N cover piece 12 in Figure 24B by the amount of overlap. Note that the overlapping portions 18, 19 of both cover pieces 12 are formed to the same width, and the width is adjusted depending on the width of the non-overlapping portion in the center of the width.

Furthermore, the side covering portion 17 in Figures 24E(a) and (b) covers either the short side 3c or 3d of the foundation 3, and has an opposite shape and structure. Therefore, regardless of which of the long sides 3a or 3b of the foundation 3 is facing above water, these two pieces can be used interchangeably.

In order to make the cover piece 12 symmetrical in the width direction, the cover piece 12 has the following configuration.

That is, the cover piece 12 has an upper surface through-hole 52b at the center of its width. The overlapping portions 18 and 19 formed on both side edges of the cover piece 12 have the same shape (width and length), and are provided with the same configuration (connecting portions 32, 33, lower surface through-hole 52a, magnet 41, etc.) on opposite sides.

The cover piece 12 also has one underside through-hole 52a at the center of the width of each of the overlapping portions 18 and 19. Furthermore, mounting holes 22 and auxiliary mounting portions 23 equipped with mounting holes 22 are symmetrically arranged around each of the overlapping portions 18 and 19, such as the peripheral edges.

As a result, the cover piece 12 has a symmetrical structure in the width direction.

In this case, overlapping portions 18 and 19 each have a male zipper that extends along the entire side edge as a connecting portion 32. Additionally, overlapping portions 18 and 19 each have a female zipper that extends the entire side edge (parallel to the male zipper) as another connecting portion 32 located more inward than the edge (at the boundary with the non-overlapping portion). In other words, overlapping portions 18 and 19 each have two types of connecting portion 32.

The first and second connecting portions 32 are arranged parallel to each other at equal intervals, and a bottom-side through-hole 52a is provided parallel to each of them at the midpoint in the width direction. The bottom-side through-hole 52a is designed to extend approximately to the extent of the inner covering portion 14 so as not to reach either end edge of the cover piece 12.

At the same positions on the extension lines of both ends of the underside threading portion 52a, one ribbon tape 33a and the other ribbon tape 33b of the hook-and-loop fastener serving as the connecting portion 33 are attached separately to the front and back sides. The one ribbon tape 33a and the other ribbon tape 33b are formed in the part that becomes the side covering portion 16 so as to reach both end edges of the cover piece 12. Cutouts are formed on the sides of the connecting portion 33 (hook-and-loop fastener) along the ribbon tapes 33a and 33b.

In addition, two plate-shaped magnets 41 are attached to each of the overlapping portions 18 and 19 of the cover piece 12, at the edges near the male fastener, at positions that form both ends of the inner covering portion 14.

As a result, overlapping portions 18 and 19 have a structure that is symmetrical in the width direction down to the smallest detail.

Furthermore, the side covering portion 17 in Figure 24E is trapezoidal, and at both ends of its longitudinal direction, it has integrally formed fold-in portions 17a in the shape of a right-angled isosceles triangle with equal sides equal to the width dimension of the side covering portion 16.

The folded portion 17a is folded in half at the center of the base along the perpendicular bisector so that the equal sides overlap each other. A first ribbon tape 33a and a second ribbon tape 33b, which constitute the connecting portion 33, are attached to the surfaces of the equal sides, respectively, along the equal sides. By folding the folded portion 17a in half and connecting the first ribbon tape 33a and the second ribbon tape 33b, the folded portion 17a takes on a three-dimensional shape that fits the corner of the base 3.

The length of the side covering portion 17 up to the folded-in portions 17a at both ends is the same as the side edge of the cover piece 12, and the upper edge is equipped with a ribbon tape 32a that serves as the female side of the connecting portion 32, extending along its entire length.

The rest of the configuration is almost the same as that shown in Figure 7 above.

Then, each cover piece 12 and side covering portion 17 are installed on the foundation 3 in the same manner as in the above embodiment, as shown in Figure 24A (b).

The cover piece 12 is installed so that the wider side of the side covering portion 16 faces above the water. The side covering portion 17 is installed so that the larger folded portion 17a faces above the water.

In this case, the cover piece 12 that is first installed on the foundation 3 is the narrow width N cover piece 12 shown in Figure 24B. The upper edge (female fastener) of one of the side covering parts 17 shown in Figure 24E is connected to the side edge (male fastener) of this narrow width N cover piece 12 that faces the short side 3d of the foundation 3.

Next, one or more wide-width W cover pieces 12 shown in Figure 24C are installed on the base 3 in a line in the installation direction 13.

That is, the side edge (overlapping portion 19) of the narrow width N cover piece 12 in Figure 24B that faces the short side 3c of the base 3 is overlapped with the side edge (overlapping portion 18) of the wide width W cover piece 12 in Figure 24C that faces the short side 3d of the base 3. Then, the male fastener of the overlapping portion 18 of the wide width W cover piece 12 is connected to the female fastener of the overlapping portion 19 of the narrow width N cover piece 12.

Then, the side edge (overlapping portion 19) of the wide-width W cover piece 12 in Figure 24C that faces the short side 3c of the foundation 3 is overlapped with the side edge (overlapping portion 18) of the wide-width W cover piece 12 in Figure 24C that faces the short side 3d of the foundation 3. Then, the male fastener of the overlapping portion 18 of the wide-width W cover piece 12 is connected to the female fastener of the overlapping portion 19 of the narrow-width N cover piece 12. This process is repeated as many times as necessary to cover the entire foundation 3.

Then, once the final wide-width W cover piece 12 shown in Figure 24C has been installed, the upper edge (female fastener) of the other side covering portion 17 shown in Figure 24E is connected to the side edge (male fastener) of the final wide-width W cover piece 12 that faces the short side 3c of the base 3. Other installation methods are the same as those in the above example.

As a result of the above, the foundation cover 8 can be installed smoothly on top of the foundation 3.

With this modified foundation cover 8, the cover pieces 12 and side covering portions 17 have a symmetrical structure, so regardless of which of the long sides 3a and 3b of the foundation 3 is facing above water, only the four types of components mentioned above can be used, increasing the versatility of the cover pieces 12. Otherwise, the structure can be the same as in the above-mentioned embodiment, and the same functions and effects can be obtained.

Figure 25 is used to explain this embodiment. Below, we will explain the differences from the previous embodiment. Other than that, this embodiment is almost the same as the previous embodiment, so the description of the previous embodiment can be used to describe this embodiment.

<Configuration> The configuration of this embodiment will now be described.
In this embodiment, the cover member 11 has a recess 101 in the foundation 3 that slopes downward from one end to the other end.
The recess 101 may have, at its bottom, a drain nozzle 103 that is inserted into a foundation-penetrating sleeve 102 provided in the foundation 3 .

Here, the recess 101 is a depression formed by pressing down on the portion of the cover member 11 that will be inside the base 3 from above, causing it to recess downward so that it is lower than the top of the base 3. If the cover member 11 is divided into multiple cover pieces 12, the recess 101 is formed in each cover piece 12.

The cover member 11 can be recessed using any object, but for example, as in the above example, a rod-shaped member 51 such as an upper pressure rod 85 (not shown in Figure 24) can be placed on top of it so that the weight of the upper pressure rod 85 causes the cover member 11 to recess. Use a short upper pressure rod 85 so that its other end does not reach the top of the underwater side (long side 3b) of the foundation 3.

The upper pressure bar 85 is then installed so that one end is positioned above the above-water edge (long side 3a) of the foundation 3, and the other end is positioned above the inside bottom surface of the foundation 3, just in front of the below-water edge (long side 3b) of the foundation 3. In this case, the upper pressure bar 85 may be straight, or it may be curved to match the ideal shape of the recess 101.

As a result, with the other edge and side covering portion 16 of the cover member 11 covering the underwater side (long side 3b) of the foundation 3, the inside portion of the foundation 3 is recessed downward from one end to the other (so that it is lower than the top of the foundation 3). The recess 101 then has the same drainage function as the drain groove 89 in the above embodiment.

The foundation-penetrating sleeve 102 is a pipe member buried at the other end of the foundation 3, connecting the inside and outside of the foundation 3. In this embodiment, the foundation-penetrating sleeve 102 is buried at or below the middle in the vertical direction 4 on the underwater side of the foundation 3 (long side 3b), so that it is nearly horizontal or slopes slightly downward toward the outdoors. In this embodiment, the foundation-penetrating sleeve 102 is buried at the lowest position of the rising outer perimeter of the foundation 3.

After weatherproofing, the foundation penetration sleeve 102 can be used to pass, for example, piping such as water supply pipes and drainage pipes, and wiring such as electrical wires and signal cables. In this way, by running wiring and piping through the foundation penetration sleeve 102 buried in the foundation 3, it becomes possible to perform maintenance on the wiring and piping that has penetrated the foundation 3 without destroying it. The foundation penetration sleeve 102 should be kept closed when no wiring or piping is being used.

When the drain nozzle 103 at the bottom of the recess 101 is inserted into the foundation-penetrating sleeve 102, the recess 101 slopes downward toward the foundation-penetrating sleeve 102. Furthermore, the recess 101 is recessed into a shape such that the end point (bottom) of the downward slope of the recess 101 matches the foundation-penetrating sleeve 102. Then, the drain nozzle 103 located at the bottom of the recess 101 enters the foundation-penetrating sleeve 102.

The drain nozzle 103 is a drain outlet-forming member attached to a through-hole that penetrates between the front and back of the cover member 11. The drain nozzle 103 can be attached to the cover member 11 in advance, or can be installed on-site. The drain nozzle 103 only needs to be inserted at least into the foundation-penetrating sleeve 102, but it is preferable that the drain nozzle 103 be long enough to extend beyond the foundation-penetrating sleeve 102 toward the outdoors. The drain nozzle 103 may be equipped with a strainer at the inlet to prevent clogging.

As in the above-water embodiment, the above-water side of the cover member 11 may be raised above the top surface of the foundation 3 by attaching horizontal members 83 and vertical diagonal members 84 to the above-water fittings 81.

Furthermore, since the abovewater side of the cover member 11 only needs to be higher than the foundation-penetrating sleeve 102, it may be made approximately the same height as the top of the foundation 3, for example, without providing a horizontal member 83. In this case, vertical members 104 may be provided instead of the vertical diagonal members 84. The vertical members 104 are rod-shaped members 51 that extend from the abovewater side to the belowwater side approximately horizontally or at a gentle downward slope, at a height approximately the same as or slightly higher than the top of the foundation 3.

The vertical members 104 may be attached to bolt members 71 provided on the above-water and below-water long sides 3a, 3b of the foundation 3 using low mounting brackets 72 similar to the underwater brackets 82. This eliminates the need for the above-water brackets 81 and horizontal members 83, and also allows the cover pieces 12 to be positioned nearly horizontally, allowing the side covering portions 16 at both end edges to have approximately the same width.

Other configurations can be similar to those in the above example.

<Function> The function of this embodiment is as follows:

In this embodiment, a recess 101 is formed in the foundation 3 for the cover member 11, sloping downward from one end to the other. A drain nozzle 103 is then attached to the bottom of the recess 101 and inserted into a foundation-penetrating sleeve 102 provided in the foundation 3. This provides temporary waterproofing for the foundation 3 of the building 1.

<Effects> This embodiment provides the following effects:

In the foundation cover 8, the cover member 11 may have a recess 101 on the inside of the foundation 3 that slopes downward from one end to the other. The recess 101 may have a drain nozzle 103 at its bottom that is inserted into a foundation-penetrating sleeve 102 provided in the foundation 3.

This allows rainwater that falls on the cover member 11 to be collected in the recess 101 and then drained naturally from the drain nozzle 103 at the bottom of the recess 101 through the foundation-penetrating sleeve 102 to the outside of the foundation 3. This prevents rainwater from accumulating on the cover member 11.

1. Building (unit building)
2 Building unit 3 Foundation 3a Long side (side above water)
3b Long side (underwater side)
3c Short side 3d Short side 8 Foundation cover 21 String-like member 24 Peg 51 Rod-like member 52 Rod-through portion 52a Lower surface side through portion 52b Upper surface side through portion 71 Bolt member 72 Mounting metal fitting 81 Above-water metal fitting 82 Below-water metal fitting 83 Horizontal horizontal member 84 Vertical diagonal member 85 Upper holding rod 89 Drain groove 91 Fixing metal fitting

Claims (3)

A foundation cover is provided to cover the foundation of a unit building in which multiple building units are installed side by side ,
The foundation cover is held by an anchor bolt embedded in the foundation and protruding upward via at least one of a mounting bracket and a rod-shaped member detachably attached to the mounting bracket,
The mounting hardware includes above-water hardware that is installed at least at both ends of the above-water edge of the foundation and at the boundary of the building unit , and under-water hardware that is installed at least at both ends of the below-water edge of the foundation opposite the above-water edge and at the boundary of the building unit ,
The above-water fittings are made higher than the below-water fittings , so that the foundation cover covers the foundation obliquely, with a downward slope from the above-water side to the below-water side .
The rod-shaped member is
A horizontal member disposed along the above-water side and supported by the above-water fittings;
A vertical diagonal member is disposed at the boundary portion perpendicular to the horizontal member and is supported downwardly by the above-water fittings and the below-water fittings,
Furthermore, an upper pressure rod is provided which is arranged parallel to the vertical diagonal members at a position between the vertical diagonal members and is placed on the foundation cover from above to form a drainage groove in the foundation cover with a downward slope that gradually becomes larger and deeper from the above-water side to the below-water side ,
A foundation cover installation structure characterized in that the horizontal members can be disassembled to the length of the sides of the building units . The foundation cover installation structure according to claim 1,
The foundation cover has a recess in the foundation that slopes downward from the above-water side to the below-water side,
A foundation cover installation structure characterized in that the recess has, at its lowest part, a drainage nozzle that is inserted into a foundation-penetrating sleeve provided in the foundation . The anchor bolts are embedded in at least the above-water edge of the foundation of a unit building in which a plurality of building units are installed side by side and protrude upward. Among these, above-water fittings are installed on at least both ends and on the boundary of the building units, and horizontal members extending along the above -water edge are attached to the above-water fittings.
The horizontal members can be decomposed into the lengths of the sides of the building units,
The foundation on which the horizontal horizontal members are installed so that the water fittings are higher than the water side edge is covered obliquely from above with a foundation cover,
The foundation cover is fixed to at least one of the anchor bolts and the fixing metal fittings attached to the anchor bolts, and the peripheral portion of the foundation cover is fixed to the ground with string-like members or pegs,
immediately before installing the first building unit on the foundation, removing the string-like members and the pegs to release the peripheral edge of the foundation cover from the ground;
From now on,
The water fittings, the fixing fittings, and a portion of the horizontal members installed in the portion where the building unit is to be installed are removed from the foundation;
The building unit to be installed is placed in a floating state above the foundation, and the foundation cover located under the floating building unit is partially lifted up;
A foundation cover removal method characterized by the process of installing the building units on top of the parts of the foundation that were covered by the turned-over foundation cover, performed sequentially along the length of the horizontal members until all of the building units are installed on the foundation .