JP7114275B2 - Floor construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floor construction method for constructing a floor that can be used for a long time at a position higher than a base surface.

In a conventional floor construction method, as shown in Patent Document 1, a space surrounded by side walls is filled with a filler, and then a flooring material is installed on the filler.

Patent No. 2775693 (paragraph [0002], Figure 2)

In the above-described conventional floor construction method, since the floor material is installed after the filling material is filled, it takes time until the floor becomes ready for use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of constructing a floor that allows the floor to be used from an early stage.

A first aspect of the invention made to achieve the above object is a floor construction method for constructing a floor at a position higher than a base surface, wherein a support having a plurality of columns is formed on the base surface. death,
The floor construction method includes placing a floor material on the support, filling a space between the base surface and the floor material with a filler, and integrating the filler and the support. .

A second aspect of the invention is the floor construction method according to the first aspect , wherein a sidewall surrounding the support is formed, and the space closed by the floor material and the sidewall is filled with the filler.

A third aspect of the invention is the floor construction method according to the second aspect , wherein the side walls are connected to the support columns in forming the side walls.

In a fourth aspect of the invention, the bottom surface of an underground space having an opening in the ground is used as the base surface, and the floor material is installed on the support so as to block the opening, and the floor material and the The floor construction method according to the first aspect , wherein the filling material is filled into the space closed by the wall of the underground space.

A fifth aspect of the invention is the method for constructing a floor according to any one of the first to fourth aspects , wherein rigid polyurethane foam is used as the filler.

According to a sixth aspect of the invention, in forming the support, a horizontal member is horizontally laid between the upper ends of the plurality of columns, a joist is fixed to the horizontal member, and the joist is fixed to the horizontal member. , a structure having a main body portion having a gate shape in cross section and a flange portion projecting outward from the lower end portion of each leg portion of the main body portion, and fixing the floor material to the top portion of the main body portion; A floor construction method according to any one of the fifth aspects .

In a seventh aspect of the invention, the horizontal member has a circular cross-section, and comprises an annular fitting portion that fits into the horizontal member from the outside, and a protruding piece projecting outward from the fitting portion. When preparing the connection fitting and fixing the joist to the horizontal member, the fitting portion of the connection fitting is fitted to the horizontal member from the outside, and the projecting piece of the connection fitting and the The floor construction method according to the sixth aspect , wherein the flange portion of the floor joist is overlapped and fixed.

[ First aspect to fifth aspect of the invention]
According to the first aspect of the invention, since a simple structure in which the floor material is installed on the support is constructed first, the floor can be used from an early stage. By filling the space between the flooring material and the base surface with the filling material, the flooring material is also supported by the filling material integrated with the support. This allows long-term use of the floor.

In addition, the construction of the floor may be performed as follows. That is, as in the second aspect of the invention, a side wall may be formed to surround the support, and the space closed by the floor material and the side wall may be filled with a filling material. , the bottom of an underground space with an opening in the ground is used as the base surface, and a floor material is installed on the support so as to block the opening, and the space is closed by the floor material and the walls of the underground space. You may perform by filling a filler into. Examples of the former floor include platform floors and stage floors. An example of the latter floor is a floor that fills an underground passageway or cellar and is formed at the opening thereof.

When forming a side wall surrounding the support, the side wall can be stably fixed by connecting the side wall to the support ( third aspect of the invention ).

As the filler, rigid polyurethane foam may be used ( the fifth aspect of the invention ), or concrete, earth and sand, air-laid mixed lightweight soil, or the like may be used. The rigid polyurethane foam used as a filler includes blocks made of pre-foamed rigid polyurethane foam, pulverized pre-foamed rigid polyurethane foam, main agent (Liquid A) and curing agent (Liquid B) on site. ) and a rigid polyurethane foam (rigid polyurethane foam by on-site foaming) formed by reacting and spraying a two-component liquid raw material. If a rigid polyurethane foam produced by on-site foaming is used as the filler, even a narrow gap in the space between the base surface and the floor material can be filled with the filler without gaps. In addition, the filler may be formed by combining a block made of pre-foamed rigid polyurethane foam or its pulverized material and a rigid polyurethane foam foamed on site.

[ Sixth aspect of the invention ]
According to the sixth aspect of the invention, since the joist is configured to have a gate-shaped main body in cross section, the flooring can be stably fixed to the top of the joist. Furthermore, since the joist material has a flange portion projecting from the lower end of each leg of the main body, the joist material can be easily fixed to the horizontal member using the flange portion of the joist material. can.

[ Seventh aspect of the invention ]
According to the seventh aspect of the invention, the connecting fitting has a structure in which the overhanging piece protrudes outward from the annular fitting portion. It is possible to fix the projecting piece and the joist material in a state where the fitting part is fitted to the material.

1 is a perspective view of a platform with a floor according to the first embodiment; FIG. AA sectional view of the platform BB sectional view of the platform Side sectional view of connecting metal fittings (A) Perspective view of panel material, (B) Enlarged view showing end of strip material (A) Perspective view of side wall fixing part, (B) Side sectional view Side sectional view for explaining the construction process of the floor Side sectional view for explaining the construction process of the floor A perspective view for explaining the fixing of the wall surface material fixing part to the wall surface material. Schematic diagram for explaining the filling of the filler (A) side cross-sectional view of the underground filling body provided with the floor according to the second embodiment, (B) enlarged side cross-sectional view around the elevating unit CC sectional view of underground filling body Side sectional view for explaining the construction process of the floor Schematic diagram for explaining the filling of the filler (A) side sectional view, (B) side view, and (C) perspective view of a connecting fitting according to another embodiment

As shown in FIG. 1, the floor 10 of the present embodiment is the floor of a platform 100 that serves as a place for passengers to get on and off trains, etc., and is constructed at a position higher than the ground G on which the railroad track R is laid. ing. Specifically, as shown in FIG. 2, in the platform 100, the floor material 11 that constitutes the floor 10 is supported from below by supports 20 erected on the ground G. As shown in FIG. In addition, in this embodiment, the ground G serves as a base surface for supporting the support body 20 .

The platform 100 also includes sidewalls 30 surrounding the four sides (front side, back side, left and right sides) of the support 20, and fillers 40 filling the space closed by the floor material 11 and the sidewalls 30. It is The floor material 11 is also supported from below by a filler 40 integrated with the support 20 . In addition, the filler 40 is composed of a rigid polyurethane foam produced by on-site foaming.

As shown in FIG. 2 , the support 20 includes a plurality of struts 21 and a horizontal member 22 that spans horizontally between the struts 21 . The column 21 is formed by attaching a column body 21B on a jack 21A for adjusting the height of the column 21. - 特許庁The jack 21A is, for example, a screw jack. The column main body 21B is formed with a circular cross section and is composed of, for example, a circular pipe. In the support 20 , a plurality of sets of pillars 21 each having a predetermined number of pillars 21 arranged in the width direction of the platform 100 are arranged in the longitudinal direction of the platform 100 .

There are two types of horizontal members 22: a first horizontal member 22A extending along the longitudinal direction of the platform 100 and a second horizontal member 22B extending along the width direction of the platform 100. As shown in FIG. Each of the first horizontal member 22A and the second horizontal member 22B is fixed to the post 21 by a fixture such as a clamp. Both the first horizontal member 22A and the second horizontal member 22B are formed to have a circular cross-section, and are composed of circular pipes, for example.

As shown in FIG. 4, the first horizontal member 22A includes an upper end horizontal member 22J that bridges between the upper end portions of the plurality of columns 21. As shown in FIG. A joist member 24 is fixed to the upper end horizontal member 22J via a connecting metal fitting 23. As shown in FIG.

The connecting fitting 23 is composed of a fitting portion 23A formed in an annular shape and an overhanging piece 23B projecting radially outward from the fitting portion 23A. The inner diameter of the fitting portion 23A is substantially the same as the outer diameter of the upper end horizontal member 22J, and the fitting portion 23A is fitted to the upper end horizontal member 22J from the outside. The protruding pieces 23B protrude from two locations 180 degrees apart in the circumferential direction of the fitting portion 23A, and the two protruding pieces 23B, 23B are both arranged horizontally. The fitting portion 23A is fixed to the upper end horizontal member 22J by screwing.

The joist member 24 has a structure in which a flange portion 24F protrudes outward from each lower end portion of a pair of leg portions 24K, 24K of a main body portion 24H having a gate shape in cross section. The flange portion 24</b>F is fixed over the overhanging piece 23</b>B of the connecting fitting 23 . A floor member 11 is screwed onto the top portion 24T of the main body portion 24H. The flange portion 24F and the overhanging piece 23B are fixed by screwing.

As shown in FIG. 1 , the floor material 11 is formed by arranging a plurality of panel materials 12 in the longitudinal direction of the platform 100 . As shown in FIG. 5, the panel material 12 is formed by connecting a plurality of strips 13 in the width direction with connecting members 14 . Specifically, the connecting member 14 has an L-shaped cross section and extends in the width direction of the strip 13 with one side of the L-shaped portion directed downward. The connecting member 14 is screwed to the plurality of band members 13 in a state where the other side of the L-shaped connecting member 14 is attached to the lower surface of the plurality of band members 13 .

As shown in FIG. 5, the strip 13 has a structure in which a pair of main walls 13A, 13A facing each other in the thickness direction are connected by a plurality of connecting walls 13B. The connecting wall 13B extends along the longitudinal direction of the strip 13. As shown in FIG.

As shown in FIG. 2 , the side wall 30 is formed by arranging a plurality of vertically arranged wall surface members 31 in the height direction and the longitudinal direction of the platform 100 . The wall surface material 31 has the same structure as the band material 13 described above, and consists of a pair of main walls 31A, 31A connected by a plurality of connecting walls 31B. And the wall surface material 31 is arrange|positioned so that the width direction of 31 A of main walls may face perpendicularly.

Each wall member 31 of the side walls 30 is connected to the supports 21 of the support 20 by side wall connecting portions 50 . Thereby, the sidewall 30 is stabilized. As shown in FIG. 6A, the side wall connecting portion 50 is formed by connecting a support fixing portion 51 fixed to the support 21 and a wall surface material fixing portion 52 fixed to the wall surface material 31 .

Specifically, the column fixing portion 51 has a structure similar to that of the connecting metal fitting 23 described above, and includes a fitting portion 51A that is fitted to the column 21 from the outside and an overhanging piece 51B that protrudes outward. Further, the wall surface member fixing portion 52 has a structure in which a screw shaft 52S is erected from a base plate 52P. Here, the main wall 31A of the wall surface material 31 facing the support body 20 side is formed with a slit 31S extending inward from the outer edge of the main wall 31A. and the screw shaft 52S is inserted through the slit 31S. The base plate 52P is fixed to the main wall 31A by screwing, and the screw shaft 52S is fixed to the protruding piece 51B by screwing.

Sealing materials (not shown) such as packing are used to seal between the floor material 11 and the side wall 30, between the side wall 30 and the ground G, between the plurality of strip materials 13, and between the plurality of wall surface materials 31. It is

The floor 10 of this embodiment is constructed as follows. First, as shown in FIG. 7A, the support 20 is erected on the ground G (support forming step), and the floor material 11 is installed on the support 20 (floor material installing step). ). Next, as shown in FIG. 7B, sidewalls 30 surrounding the support 20 are formed (sidewall forming step). When the side wall 30 is formed, as shown in FIG. 8A, the space S1 closed by the floor material 11 and the side wall 30 is filled with the filling material 40 (filling step). When the filler 40 is integrated with the support 20, the platform 100 is completed and the floor 10 supported from below by the support 20 and the filler 40 is completed as shown in FIG. 8B. .

The details of the support forming step are as follows. In the support forming process, first, a plurality of columns 21 are erected on the ground G, and a horizontal member 22 is bridged between the columns 21 . The plurality of supports 21 are arranged along the extending direction of the track R (see FIG. 1) and the direction orthogonal to the extending direction. The height of each strut 21 is adjusted by jacks 21A as required. Prior to the work of erecting the pillars 21, the pillars 21 arranged in the row closest to the track R and the pillars 21 arranged in the row farthest from the track R are provided with the pillar fixing portions 51 (see FIG. 6A). is fixed.

The horizontal member 22 is fixed to the column 21 by a fixture (not shown) such as a clamp that is preliminarily fixed to the column 21 . The horizontal members 22 arranged along the extending direction of the railroad tracks R become the first horizontal members 22A, and the horizontal members 22 arranged along the direction perpendicular to the railroad tracks R become the second horizontal members 22B. becomes. Among the horizontal members 22 that become the first horizontal member 22A, the horizontal member 22 that bridges the upper end portions of the pillars 21 is an upper end horizontal member 22J. Here, the connecting fittings 23 (see FIG. 4) are fixed in advance to the horizontal members 22 that will become the upper end horizontal members 22J. The protruding piece 23B is arranged horizontally.

When the upper end horizontal member 22J is spanned between the plurality of columns 21, the joist member 24 is fixed to the connecting fitting 23. As shown in FIG. Specifically, the flange portion 24F of the floor joist 24 is placed on the projecting piece 23B of the connecting fitting 23, and the flange portion 24F and the projecting piece 23B are screwed together. Thus, the support forming step is completed. Thus, in this embodiment, the connecting fitting 23 interposed between the upper end horizontal member 22J and the joist 24 has a structure in which the projecting piece 23B projects outward from the annular fitting portion 23A. Therefore, even if the horizontal member 22 has a circular cross section, the joist member 24 can be fixed to the overhanging piece 23B in a state where the fitting portion 23A is fitted to the horizontal member 22.

The details of the floor material installation process are as follows. In the floor material installation process, a plurality of panel materials 12 are arranged on the joist material 24 of the support 20 and screwed to the joist material 24 (more specifically, the top portion 24T of the joist material 24). Here, since the main body portion 24H of the joist material 24 has a gate shape in cross section, it is possible to stably fix the floor material 11 to the joist material 24 .

A plurality of panel members 12 are arranged in the extending direction of the railroad track R. Each panel material 12 is arranged so that the connecting member 14 (see FIG. 5) faces downward and the width direction of the strip material 13 is substantially parallel to the railroad track R. As shown in FIG. In order to shorten the time required for the floor material installation process, the plurality of panel materials 12 are prepared prior to the floor material installation process. The panel material 12 is formed by arranging a plurality of band materials 13 in the width direction and connecting the plurality of band materials 13 with connecting members 14 .

When the plurality of panel materials 12 are fixed to the joist material 24, the floor material 11 constituting the floor 10 is installed on the support 20, and the floor material installation process is completed. The floor 10 at the end of the flooring installation step is supported from below only by the supports 20, and the supports 20 have sufficient strength to withstand short-term use of the floor 10. FIG. Here, the short-term use is a usage that is built for the purpose of continuing only for a specific period of time and is dismantled after a specific period of time, that is, use as a temporary structure. Although the specific period depends on the purpose, application, frequency of maintenance, etc., it is generally about 6 months to 1 year. On the other hand, long-term use is a way of using that is built for the purpose of continuous use without setting an expiration date, and is used as a permanent or permanent structure. be.

The details of the sidewall forming process are as follows. In the side wall forming step, a plurality of wall surface members 31 are arranged so as to surround the support 20 from all sides, and each wall surface member 31 is fixed to the struts 21 . The wall surface member 31 is arranged so that the main wall 31A having the slit 31S formed thereon faces the support 20 and the main wall 31A is vertical. Specifically, the plurality of wall materials 31 are arranged around the support 20 and stacked vertically. A gap between the wall members 31, a gap between the wall member 31 and the ground G, and a gap between the wall member 31 and the floor member 11 are sealed with sealing materials.

The wall surface material fixing portion 52 is fixed in advance to the wall surface material 31 , and the screw shaft 52S of the wall surface material fixing portion 52 is screwed to the overhanging piece 51B of the column fixing portion 51 fixed to the column 21 . When the screw shaft 52S is screwed to the protruding piece 51B, the wall surface material 31 is fixed to the column 21. As shown in FIG. When the plurality of wall materials 31 are fixed to the pillars 21, the side wall 30 is completed and the side wall forming process is finished. When the side wall forming step is finished, a space S<b>1 closed by the floor material 11 and the side wall 30 is formed under the floor material 11 . The side wall 30 secures an entrance to the space S1. The entrance/exit is arranged at one end of the side wall 30 in the extending direction of the track R, for example.

In addition, the wall surface material fixing|fixed part 52 is fixed to the wall surface material 31 as follows. That is, as shown in FIG. 9, the base plate 52P of the wall surface member fixing portion 52 is inserted between the pair of main walls 31A, 31A, and the screw shaft 52S is passed through the slit 31S. Then, the base plate 52P is fastened to the main wall 31A having the slit 31S.

The details of the filling process are as follows. In the filling step, a foaming undiluted solution of rigid polyurethane foam as the filler 40 is sprayed into the space S1. The filling material 40 is filled from the side far from the doorway of the space S1 (for example, the other end in the extending direction of the track R) toward the side closer to the doorway. Then, when the entire space S1 is filled with the filler 40, the support 20 is buried in the filler 40. As shown in FIG. The filling process is completed by the above. Since the filling material 40 is filled in the space S1 closed by the floor material 11 and the side walls 30, curing for preventing the scattering of the filling material 40 is unnecessary. Furthermore, the process of flattening the upper surface of the filler 40 for installing the flooring 11 is not necessary. In addition, since the filler 40 is made of rigid polyurethane foam, the members (for example, the panel member 12 and the struts 21) that constitute the flooring 11, the support 20, and the side wall 30 are prevented from rusting. In this embodiment, two liquids, a main component (liquid A) mainly composed of polyol, a cross-linking agent, a foaming agent, etc. and a curing agent (liquid B) mainly composed of isocyanate, are discharged (stirred) at high pressure at the site. By doing so, spraying is performed. Both the A liquid and the B liquid are liquid at room temperature.

Here, since heat is generated in the process of foaming and curing the foaming stock solution to form a rigid polyurethane foam, the foaming stock solution is sprayed in a predetermined amount at a time. Therefore, the filling material 40 is formed in layers from the end of the space S1 farther from the entrance toward the entrance. Note that the foaming solution is preferentially sprayed onto the lower surface of the floor material 11 and the inner surface of the side wall 30 . Specifically, the first layer 40K1 of the filler 40 that is formed first is formed in a shell shape in contact with the lower surface of the floor material 11 and the inner surface of the side wall 30 (FIG. 10A), and the second and subsequent layers are formed. The second layer 40K2 and the third layer 40K3 of the filler 40 are formed in the shape of a vertical wall inside the first layer 40K1 (see FIG. 10B). Then, when the inner portion of the first layer 40K1 is filled with the filler 40, a shell-like layer similar to the first layer 40K1 is formed from the side of the filler 40 closer to the entrance, and the inner side of the layer is formed. A plurality of vertical wall-like layers are formed in the portion.

When the filling process is completed and the filler material 40 is integrated with the support 20, the platform 100 (see FIG. 1) is completed and the floor 10 shown in FIG. 2 is completed. Further, since the floor 10 is supported not only by the supports 20 but also by the filler 40, long-term use of the floor 10 becomes possible (it becomes a permanently installed structure).

In the construction method of the floor 10 of the present embodiment, the floor material installing step is performed after the supporting body forming step and before the side wall forming step and the filling step. In the floor material installation step, the floor material 11 is installed on the support 20, whereby the floor 10 is simply formed and the floor 10 can be used for a short period of time. As a result, the floor 10 can be used early without waiting for the completion of construction. Moreover, in this embodiment, the floor material 11 is supported from below not only by the support 20 but also by the filler 40 in the filling process, so that the floor 10 can be used for a long period of time when the construction is finished.

In addition, in the present embodiment, since the filler 40 is formed by directly spraying hard polyurethane foam by on-site foaming, in the space S1, the gaps (for example, horizontal The filling material 40 is easily filled in the gap between the material 22 or the joist material 24 and the floor material 11, and the gap between the support 21 and the side wall 30). As a result, the space S1 is filled with the filling material 40 without gaps, and the support of the floor material 11 is stabilized.

In addition, since the filler 40 is formed by directly spraying hard polyurethane foam produced on site, the filler 40 can be filled downward from the bottom surface of the flooring material 11, and the filler 40 can be filled with voids. is suppressed, and the filling material 40 can be filled without gaps. Therefore, the flooring 11, the support 20, and the side wall 30 are integrated by the filler 40, and the flooring 11 is a state in which the flooring 11, the support 20, and the side wall 30 are integrated through the filler 40. will be supported by As a result, the platform 100 can be a strong permanent structure, and the floor 10 can be used for a long period of time. Further, when the filler 40 is composed of rigid polyurethane foam, the weight of the platform 100 itself can be reduced because the filler 40 is lightweight. As a result, it is possible to prevent the platform 100 from tilting or deforming due to land subsidence or the like after construction.

In this embodiment, since the connecting metal fitting 23 and the column fixing portion 51 have the same structure, the connecting metal fitting 23 and the column fixing portion 51 can be shared. Furthermore, since the strip 13 and the wall surface material 31 forming the panel member 12 have the same structure, the strip material 13 and the wall surface material 31 can be used in common.

[Second embodiment]
As shown in FIG. 11(A), the floor 10V of this embodiment is formed by an underground filling body 200 filling an underground passage 210. As shown in FIG. The underground passage 210 includes a plurality of openings 211A that open to the ground G at entrances 211 provided at a plurality of points, a lifting section 230 that extends underground from the openings 211A, and a lifting section that extends substantially parallel to the ground G. and a passage body 220 connecting the 230 to each other. In addition, in the example of FIG. 11(B), although the stairs 230K are formed in the raising/lowering part 230, a slope may be formed.

The underground filling body 200 fills the entire underground passage 210 (that is, the entire elevating section 230 and passage main body 220). The upper part of the underground filling body 200 closes the opening 211A, and the upper surface of the underground filling body 200 is flush with the ground G. A floor 10V is constituted by a portion of the underground filling body 200 exposed from the opening 211A.

As shown in FIG. 12, the underground filling body 200 is common to the platform 100 of the first embodiment in that it includes the floor material 11, the support body 20 and the filling material 40, and the platform 100 does not include the side wall 30. is different from The structures of the floor material 11, the support 20, and the filler 40 in the underground filling body 200 are the same as those of the first embodiment, and therefore the same reference numerals are used to omit the description.

The floor material 11 in the underground filling body 200 blocks the opening 211A of the underground passage 210 . Also, the support 20 in the underground filling body 200 is erected on the underground floor surface BF of the underground passage 210 . The underground floor surface BF is composed of the floor surface BF1 of the passage body 220 and the floor surface BF2 of the elevating section 230, and serves as a base surface for supporting the support 20. As shown in FIG. In the example shown in FIG. 11B, the support 20 is erected only on the floor surface BF2 of the lifting section 230, and the support 21 is positioned on the tread surface (that is, the surface facing upward) of the stairs 230K. standing on top.

The construction method for the floor 10V of the present embodiment is common to the construction method for the floor 10 of the first embodiment in that it includes a support forming step, a flooring installation step, and a filling step, but does not include a side wall forming step. It is different from the construction method of the floor 10. In the following, the support formation step, flooring installation step, and filling step in the construction method for the floor 10V are different from the support formation step, flooring installation step, and filling step in the construction method for the floor 10 of the first embodiment. I will mainly explain the parts.

In the supporting body forming step, a plurality of columns 21 are erected on the underground floor surface BF of the underground passage 210 (floor surface BF2 of the lifting section 230) (see FIG. 13A). In this embodiment, a plurality of pillars 21 are erected on the treads of stairs 230K. In addition, the upper ends of the plurality of pillars 21 are aligned in height and arranged slightly below the opening 211A of the underground passage 210 .

In the floor material installation step, the plurality of panel materials 12 are arranged so as to block the plurality of openings 211A of the underground passage 210 . The floor material 11 that closes the opening 211A is formed of a plurality of panel materials 12, and the floor material 11 and the walls of the underground passage 210 (more specifically, the floor wall 212, the side wall 213, and the ceiling wall 221 of the underground passage 210). ) form a closed space S2. At this time, an entrance (not shown) for a worker to enter and exit during the filling process is formed in the floor material 11 that closes the specific opening 211A. It should be noted that the floor 10V supported only by the supports 20 is simply formed after the flooring installation process is completed.

In the filling step, the space S2 is filled by spraying hard polyurethane foam as the filler 40 from an opening 211A different from the specific opening 211A toward the specific opening 211A. The filling material 40 is formed in layers in multiple steps. Specifically, the first layer 40L1 of the filler 40 that is formed first is formed horizontally so as to cover the entire lower surface of the flooring 11 that closes the openings 211A different from the specific openings 211A (Fig. 14(A)), the second layer 40L2, the third layer 40L3, and the fourth layer 40L4 of the filler 40 formed second and subsequent are formed in a vertical wall shape below the first layer 40L1 (see FIG. 14A). 14(B)). Then, when the lower portion of the first layer 40L1 is filled with the filler 40, a vertical wall-like layer similar to the second layer 40L2 is formed from the side of the filler 40 closer to the specific opening 211A. be.

According to the construction method of the floor 10V of the present embodiment as well, the floor 11 forming the floor 10V is supported only by the supports 20 at the end of the floor material installation process, so the floor 10V can be constructed early without waiting until the construction is completed. can be used. In addition, since the floor material 11 is supported not only by the support 20 but also by the filler 40 from below in the filling process, the floor 10V can be used for a long period of time when the construction is completed. Moreover, since the construction method of the floor 10V of the present embodiment does not include the side wall forming step, the construction period can be shortened.

[Other embodiments]
(1) The filler 40 may be made of concrete, earth and sand, or aerated lightweight soil. In this case, in the filling process, the filling material 40 made of concrete or earth and sand is deposited upward.

Alternatively, the filler 40 may be formed by combining a pre-foamed block of rigid polyurethane foam or a pulverized block thereof with a rigid polyurethane foam produced on-site. At this time, in the filling step, a plurality of blocks made of rigid polyurethane foam and pulverized materials thereof are arranged in the spaces S1 and S2, and hard polyurethane is filled in the gaps between the blocks and pulverized materials thereof, the floor material 11 and the side wall 30. Foam blowing stock solution is sprayed. Here, since the rigid polyurethane foam produced by on-site foaming becomes hot due to the exothermic reaction, the amount of heat generated by the rigid polyurethane foam during the filling process can be suppressed by using pre-foamed blocks and their pulverized material. It becomes possible.

(2) In the first embodiment, the floor 10 formed at a position higher than the ground G was the floor of the platform 100, but any floor formed at a position higher than the ground G may be used. floor.

(3) In the above-described first embodiment, an existing side wall erected on the ground G (for example, a side wall of an outdoor pool constructed at a position higher than the ground G, a fence, etc.) is used as the side wall 30. good too. If the existing side walls surrounding the support 20 from all sides are used as the side walls 30, the side wall forming process becomes unnecessary. An existing side wall may be used as part of the side wall 30 . Even in this case, the construction period of the side wall forming process can be shortened.

(4) In the above-described second embodiment, the underground passage 210 is shown as an example of an object buried by the underground filling body 200, but any underground space may be used, such as a basement, an underground warehouse, an underground pit, and the like. good too.

(5) In the above embodiment, the protruding piece 23B of the connecting fitting 23 protrudes from the fitting portion 23A at two locations. 23B may protrude from only one portion of fitting portion 23A.

(6) In the above-described embodiment, the joists 24 are connected to the upper end horizontal members 22J via the connecting metal fittings 23. Instead of the connecting metal fittings 23, as shown in FIG. , U-bolts may be used. At this time, the upper end horizontal member 22J is arranged inside the U-shaped bolt, and both ends of the U-shaped bolt are screwed to the pair of flange portions of the joist member 24, respectively. Incidentally, as shown in FIG. 15(C), the joist member 24 may be connected to the upper end horizontal member 22J extending in the width direction of the platform 100 via a U-shaped bolt. At this time, the U-shaped bolt is screwed to the flange portion 24F of the floor joist 24 . The flange portion 24F of the joist member 24 may be directly screwed to the upper end horizontal member 22J extending in the width direction of the platform 100. FIG. In this manner, the flange portion 24F of the joist member 24 can be used to easily fix the joist member 24 to the upper end horizontal member 22J.

(7) In the above embodiment, the first horizontal member 22A and the second horizontal member 22B were formed with a circular cross section, but the first horizontal member 22A and the second horizontal member 22B have an angular cross section. It may be formed, for example, may be composed of a rectangular pipe. In this case, the flange portion 24F of the joist member 24 can be directly fixed to the upper end horizontal member 22J without using the connecting fitting 23. As shown in FIG. Further, the floor member 11 may be screwed directly to the upper end horizontal member 22J without providing the support 20 with the joist member 24. FIG.

10,10V floor 11 floor material 20 support 30 side wall 40 filler 100 platform 200 underground filler 210 underground passage

Claims (7)

A floor construction method in which the bottom surface of an underground space having an opening in the ground is used as a base surface, and the floor is constructed at a position higher than the base surface,
forming a support having a plurality of struts on the base surface;
placing a floor material on the support so as to block the opening;
A floor construction method for filling a space enclosed by the base surface, the floor material, and the wall of the underground space with a filling material to integrate the filling material and the support. A floor construction method for constructing a floor at a position higher than a base surface,
forming a support having a plurality of struts on the base surface;
In forming the support,
A horizontal member having a circular cross section is horizontally spanned between the upper ends of the plurality of pillars,
preparing a connecting fitting comprising an annular fitting portion fitted to the horizontal member from the outside and a protruding piece projecting outward from the fitting portion;
A joist member having a structure having a gate-shaped main body in cross section and a flange projecting outward from a lower end of each leg of the main body is fixed to the horizontal member,
When fixing the joist to the horizontal member, the fitting portion of the connecting fitting is fitted to the horizontal member from the outside, and the overhanging piece of the connecting fitting and the flange portion of the joist are fitted together. and fix the
fixing a floor material to the top of the main body of the joist;
A floor construction method comprising filling a space between the base surface and the floor material with a filler to integrate the filler and the support. A floor construction method for constructing a floor at a position higher than a base surface,
forming a support having a plurality of struts on the base surface;
installing a flooring material on the support;
forming a side wall facing the support to provide a doorway to a space between the base surface and the flooring;
A method of constructing a floor in which a filling material is filled into the space through the doorway and the filling material and the support are integrated. A floor construction method for constructing a floor at a position higher than a base surface,
Forming on the base surface a support body having a plurality of pillars and a plurality of horizontal members horizontally spanning between the plurality of pillars at a plurality of positions in the vertical direction;
installing a flooring material on the support;
A floor construction method comprising filling a space between the base surface and the floor material with a filler to integrate the filler and the support. A floor construction method for constructing a floor at a position higher than a base surface that is the bottom surface of the ground or underground space,
forming a support having a plurality of struts on the base surface;
installing a flooring material on the support;
A floor construction method comprising filling a space between the base surface and the floor material with a filler to integrate the filler and the support. A floor construction method for constructing a floor at a position higher than the base surface (excluding the floor surface of the old platform),
forming a support having a plurality of struts on the base surface;
installing a flooring material on the support;
A floor construction method comprising filling a space between the base surface and the floor material with a filler to integrate the filler and the support. A floor construction method for constructing a floor at a position higher than a base surface,
forming a support having a plurality of struts on the base surface;
A floor material is connected to some of the plurality of columns, and a side wall that horizontally faces the support and is not directly connected to the floor material is connected to another part of the plurality of columns,
A floor construction method comprising filling a space between the base surface and the floor material with a filler to integrate the filler and the support.

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