JP3313332B2 - Top-open construction closure method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid closing method for closing a top open portion of a building having an open top, such as an open fire tank, with a lid plate.

[0002]

2. Prior Art and Problems to be Solved by the Invention Showa 3
Fire prevention water tanks constructed in the 0's and 40's were made of cast-in-place concrete, and many were open-ended with open tops. Although this type of fire prevention water tank is still being used today, work is required to close the open upper end with a cover plate in order to prevent danger.

[0003] Conventionally, however, a method has been adopted in which the upper end opening of the fire prevention water tank is closed with cast-in-place concrete. However, it is necessary to assemble a large-scale formwork, which requires a lot of time and labor for construction. However, there is a problem that the construction cost is prolonged and the construction cost increases.

[0004] In view of the above, a method of closing the open upper end with a lid plate made of precast concrete has been considered. However, in the fire prevention water tank constructed by cast-in-place concrete, the height of the upper end of the water tank is not constant, and when viewed at the four corners of the upper end, a height difference of about 6 to 15 mm often occurs. If there is such a large difference in height, simply installing the lid plate directly on the upper end of the water tank will cause rattling and a stable lid structure cannot be obtained.

In such a case, it is not conceivable to finish the upper end of the standing wall having the height difference substantially horizontally by plastering and to install a cover plate on the finished surface. Not only requires much labor, but also prolongs the construction period and raises construction costs.

[0006] By the way, even in this type of fire prevention water tank,
The height difference at the top of the water tank is rarely within 5 mm. In such a case, for example, it is possible to absorb the height difference by interposing a sheet-like elastic packing material having a thickness of about 10 mm. However, when the height difference is as large as about 6 to 15 mm, it is difficult to reliably and stably absorb the height difference depending on the sheet-like elastic packing material.

When the upper end opening is closed with a lid plate made of precast concrete, for example, as shown in FIG. 13, an adjusting bolt c is screwed into a screw cylinder b embedded in a lid plate a, and the adjustment is performed. By projecting the lower end portion d of the bolt c from the lower surface e of the cover plate by a required amount, the height difference of the upper end f of the upright wall is absorbed, so that the cover plate a can be installed substantially horizontally.

However, in such a configuration,
It is necessary to form a screw hole having a relatively large diameter by embedding the screw cylinder b. Also, considering that the height difference of the upper end of the upright wall is large, the enlarged hole g for accommodating the bolt head g of the adjusting bolt c has to be deepened.
However, there is a possibility that the screw hole may be broken or chipped. In addition, a screw cylinder b must be embedded in the cover plate a, and a special adjustment bolt c to be screwed into the screw cylinder must be prepared.
Furthermore, it is necessary to provide an enlarged hole h for accommodating the bolt head g of the adjusting bolt at the upper end of the screw cylinder, which not only complicates the production of the cover plate but also raises the production cost. In addition, there is also a problem that it takes time and effort to fill the enlarged hole h with mortar after the adjusting bolt c is brought into a required screwed state, which causes a reduction in construction efficiency.

Further, as shown in FIG. 14, an adjusting bolt k is screwed into an insert j buried in the upper end of the upright wall, and the height of the head m is set as required to absorb the difference in height of the upper end f of the upright wall. It is not inconceivable to do. However, in such a configuration, a special construction for burying the insert j at the upper end of the upright wall is required, which causes a problem that the number of construction steps is increased and the construction cost is increased.

According to the present invention, for example, the upper end opening of a construction having a large difference in height at the upper end, such as the above-mentioned fireproof water tank without lid, which is constructed of cast-in-place concrete, is made simple and assuredly with a lid plate, and at a reduced cost. It is an object of the present invention to provide a method for closing a top-opened structure, which enables the lid to be closed.

[0011]

The present invention employs the following means to solve the above-mentioned problems. That is, the method of closing a structure with an open top according to the present invention (hereinafter referred to as a cover closing method) is a method of closing a top open portion of a structure provided with an upright wall opposed thereto with a lid plate made of precast concrete. According to the height difference of the upper end of the standing wall of the building, a plurality of adjusting supports of a required height are installed at a required interval at the upper end of the standing wall, and the upper surface of each adjusting support rises from the upper end of the standing wall. So that they are on the same level.
In placing the lid plate on the upper surface of the adjustment support,
On the inner and outer side portions of the upper end of the upright wall, an elastic packing material is interposed in an elastically compressed state so as to sandwich the adjustment support therebetween,
Thus, a filling space is formed between the inner and outer elastic packing materials, the upper end of the standing wall, and the lower surface of the lid plate, and thereafter, the filling space is filled with a grout material.

[0012] A more specific embodiment of the lid closing method according to the present invention is a lid closing method in which an open upper end of a structure provided with standing walls facing each other is closed with a lid plate made of precast concrete. According to the height difference of the upper end of the standing wall of the building, an adjusting support having a required height is installed at the highest portion thereof, and the upper surface height of the adjusting support installed at another portion of the upper end of the standing wall is adjusted. The height is set to be substantially the same as the upper surface height of the support. Then, when placing the lid plate on the upper surface of the adjustment support, on the inner and outer side portions of the upper end of the upright wall, an elastic packing material is interposed in an elastically compressed state so as to sandwich the adjustment support therebetween, A filling space is formed between the inner and outer elastic packing materials, the upper end of the standing wall, and the lower surface of the lid plate, and thereafter, the filling space is filled with a grout material.

Another more specific embodiment of the lid closing method according to the present invention is a lid closing method for closing an upper end opening portion of a building provided with an upright wall opposed thereto with a lid plate. According to the height difference of the upper end of the upright wall, an adjusting support having a required height is installed at the highest portion thereof, and the height of the upper surface of the adjusting support installed at another portion of the upper end of the upright wall is adjusted by the adjusting support. Is set to be approximately the same as the upper surface height of. In addition, an elastic packing material is attached to the inner and outer side portions of the upper end of the upright wall so as to sandwich the adjustment support therebetween, and the upper end of the elastic packing material projects upward from the upper surface of the adjustment support, Thereafter, the elastic packing material is elastically compressed, and the lid plate is placed on the upper surface of the adjustment support, thereby forming a filling space between the inner and outer elastic packing materials, the upper end of the standing wall, and the lower surface of the lid plate. Thereafter, the filling space is filled with a grout material.

In the above-mentioned lid closing method, when the construction is a container having an open upper end, the elastic packing material is continuously attached in a circumferential direction on inner and outer side portions of an upper end of the standing wall of the container, and thereafter, the elastic packing material is attached. It is preferable to close the upper end opening portion with a lid plate.

In each of the above-mentioned lid closing methods, a gap is formed between the adjusting support provided at the upper end of the upright wall and the inner and outer elastic packing members to allow the grout material to pass even when the elastic packing material is in a compressed state. It is better to be done.

In each of the lid closing methods, the adjusting support may be formed by stacking a plurality of types of adjusting pieces having different thicknesses.

In each of the lid closing methods, a stopper is protruded from a lower surface of the cover plate so as to be proximate to an inner edge of a cover plate edge portion covering an upper end of the standing wall of the building, and the stopper metal is provided on the inner surface of the standing wall. It is preferable that the lid plate be configured so as to prevent displacement of the lid plate by being in contact with the lid plate.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In the lid closing method according to the present invention, as shown in FIG. 2, the upper end opening portion 3 formed by the standing wall 2 of the building 1 as the open fireproof water tank 1 a shown in FIG. Lid version 4
Is to close the lid. The height of the upper end 5 of the standing wall of the fire prevention water tank 1a is not constant.
A height difference of about 0 mm occurs.

In the present embodiment, the upper end open portion 3 is completely composed of the first cover plate 4a provided with the manhole 6 and the second cover plate 4b provided with no manhole. The lid is to be closed.

In order to prevent the lid plates 4a, 4b and 4b from being displaced in the closed state and falling down, as shown in FIGS. 7
For example, a stopper metal 9 as a bolt is projected. As shown in FIG. 10, the stopper metal 9 is provided close to the inner edge 11 of the lid plate edge portion 10 covering the upright wall upper end 5, and the lid plate 4 is moved in the direction indicated by the arrow F in FIG. 11. When trying to shift the position, the shift stopper 9
Abuts against the inner surface 12 of the standing wall 2 of the fire prevention water tank 1a,
Further movement of is prevented. Also, each lid plate 4,4,4
At the center position of both ends in the length direction of FIG.
4. As shown in FIG. 10, a communication hole 13 communicating with a filling space 27 to be described later, for injecting a grout material, or for venting air accompanying the grout material injection is provided.

In order to cover the upper end opening 3 of the fire prevention water tank 1a with the lid plate 4 having the above configuration, first, according to the height difference of the upper end 5 of the standing wall, as shown in FIGS. The cover plate 4
Is installed at a required interval with a required height for supporting the support from below. As shown in FIGS. 8 and 9B, for example, the adjusting support 15 is formed by stacking required types of adjusting pieces 16 made of an iron plate, a plastic plate, a wooden plate, or the like having different thicknesses, thereby obtaining a required height. This is what is configured. In the present embodiment, as shown in FIG. 2 and FIG. 5, since the upper end opening portion 3 of the fire prevention water tank is closed with three lid plates 4, 4, 4, as shown in FIG. Arranged state in which the plate can be stably supported, for example, it is arranged at the four corners at the upper end of the water tank and at the joint between the adjacent lid plates. The adjustment support 15 arranged at this joint portion is set to a size capable of simultaneously supporting the corner portions of the adjacent lid plates.

As the adjustment support to be installed in this way,
As shown in FIG. 9, the highest part of the standing wall upper end 5,
For example, at a portion indicated by reference numeral 17 in FIG. 5, an adjusting support 15a having a height of, for example, 5 mm is used. The heights of the adjustment supports 15b, 15c, and 15d installed at other portions are set such that the upper surfaces 19b, 19c, and 19d are substantially flush with the upper surface 19a of the adjustment support 15a. . Thereby, the cover plate installation surface 20 having substantially the same height is provided.
Is formed.

Thereafter, as shown in FIGS. 5 to 7, on the inner and outer side portions of the upper end 5 of the upright wall, as shown in FIGS.
A band-like elastic packing material 21 made of a foamed synthetic resin such as foamed polyethylene, for example, is adhered so as to sandwich 5 and sandwich it in the circumferential direction. In this state, a gap 22, which allows the injected grout material to pass between the adjusting support body 15 and the inner and outer elastic packing materials 21 and 21 as described later.
The inner and outer widths of the adjustment support 15 are set so that the adjustment support 22 is formed (FIG. 7). And the elastic packing material 2
The thickness of 1 is such that the top surface 23 of the packing material is
It is set to protrude above 0. The protrusion amount is 5m
It is good to set to about m.

Thereafter, the upper end opening portion 3 is closed with the three lid plates 4, 4, and 4. The lid is formed by elastically compressing the elastic packing material 21 so that the lid plate 4 is closed. It is carried on the upper surface 19 of the adjustment support 15. At that time, in order to prevent a gap from being generated between the joining portions of the adjacent lid plates 4, 4, for example, the left and right joining end surfaces of the lid plate arranged in the middle are provided with:
It is preferable to attach an elastic water-stopping material (not shown) having a thickness of about 10 mm.

The lid plates 4,4,4,4
4 with the elastic water blocking material in a slightly compressed state,
As shown in (1), the connecting bolt 25 and the nut 26 are used to connect and integrate. The compression amount of the elastic packing material 21 is
As shown in FIGS. 9 and 10, the thickness is regulated by the thickness of the adjustment support 15.

Thus, as shown in FIG. 10, the inner and outer elastic packing members 21 and 21 which have been elastically compressed and the upper end 5
A filling space 27 of the grout material continuous in the circumferential direction is formed between the cover plate 4 and the lower surface of the cover plate 4.

Thereafter, as shown in FIG. 10, a grout material 28 is injected into the filling space 27 through a required communication hole 13 provided in the cover plate 4. At this time, the remaining communication holes serve as air vent holes, and the grout material is smoothly injected into the filling space 27, and the grout material flows out of the air vent holes,
It can be confirmed that the filling space 27 is filled with the grout material.

By curing the grout material, FIG.
As shown in FIG. 1, the load on the cover plate is evenly supported on the upper surface 30 of the support portion 29 formed of the cured material of the grout material, and the cover plate is stably supported. In addition, the shift stopper 9 prevents the lid plate 4 from shifting.

[Other Embodiments] The open-ended structure to which the present invention is applied is not limited to a structure as a fire-resistant water tank made of cast-in-place concrete. If there is a difference in elevation at the upper end of a standing wall, precast concrete is used. This also applies to a structure constructed by linking blocks made of steel.

The closing method according to the present invention can be applied not only to the case where the entire upper end opening of the structure is closed, but also to the case where a part of the upper end opening is closed.

When the upper end opening of the structure is closed with a plurality of lid plates, it is necessary to form a continuous filling space on the lower surface of the lid plates in a juxtaposed state as in the above embodiment. Alternatively, an independent filling space may be formed for each lid plate unit.

The filling space may be set in a part of a space formed between an upper end of the standing wall of the building and a lower surface of the lid plate.

The grout material can be filled into the filling space by various means that enable the filling.

The elastic packing materials disposed on both sides of the installed adjustment support may be attached to the lower surface of the cover plate. The phrase "the elastic packing material is interposed between the inner and outer side portions of the upper end of the standing wall in an elastically compressed state" in the present invention also includes such an embodiment.

The lid plate that closes the open top of the open fire water tank may not have a manhole.

The adjusting support used in the present invention may have a height adjusting means such as a screw type.

[0037]

According to the present invention, the upper end opening of a building having an open upper end such as an open fire tank is designed to reliably and efficiently reduce costs even when the height difference between the upper ends of the standing walls is large. Can be closed. This will be specifically described below. That is, (1) The construction method according to the present invention does not construct a cover part by cast-in-place concrete, but rather closes the cover by installing a cover plate made of precast concrete. There is no need to build a formwork,
Construction time can be greatly reduced, thereby shortening the construction period and reducing the construction cost.

(2) The present invention also has the following advantages when compared with the case where the upper end open portion of the structure is closed with a lid plate made of precast concrete.

Compared with the case where the height difference at the upper end of the standing wall is equalized by plastering, it is possible to achieve a great reduction in labor and cost, and to perform more accurate and stable lid closing.

Also, as compared with the case where the height difference at the upper end of the standing wall is absorbed by interposing the sheet-like elastic packing material, even when there is a large difference in height at the upper end of the standing wall, there is an advantage that this difference can be easily and reliably absorbed. .

Further, when compared with the construction in which the adjustment bolt is provided on the lid plate side as shown in FIG. 13, the lid plate is formed at the portion where the screw hole is formed with the formation of the screw hole for screwing the adjustment bolt. The risk of cracking or chipping can be eliminated, and there is no uneconomical effect associated with the use of expensive height adjustment means.

Further, when compared with the construction method shown in FIG. 14 in which an insert is buried in the upper end portion of the upright wall and an adjusting bolt is screwed, a disadvantage that a special construction for burying the insert in the upper end portion of the upright wall is required. Absent.

Furthermore, according to the present invention in which the required height of the adjustment support is installed, the height-adjustable part is not fixed, and the height difference is not absorbed, unlike the case of these construction methods using the adjustment bolt. Since the adjustment support can be installed by selecting the most rational part, the degree of freedom in construction is high.

(3) The elastic packing material is interposed between the inner and outer sides of the upper end of the upright wall in an elastically compressed state so as to sandwich the adjustment support therebetween. A required filling space can be formed between the upper end of the standing wall and the lower surface of the lid slab supported by the adjustment support, and therefore, if the filling space is filled with a grout material,
The cover plate can be stably supported by the bearings formed by curing the grout material.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an open fire prevention water tank to which the present invention is applied.

FIG. 2 is a perspective view showing the closed state.

FIG. 3 is a perspective view showing a lid plate.

FIG. 4 is a perspective view showing a lid plate.

FIG. 5 is a plan view showing a state in which an adjustment support is installed at the upper end of a standing wall of a fire prevention water tank.

FIG. 6 is a perspective view showing a state in which an adjustment support is installed at the upper end of the upright wall, and an elastic packing material is attached to inner and outer side portions of the upper end of the upright wall.

FIG. 7 is a sectional view of the same.

FIG. 8 is a perspective view showing an example of an adjustment support.

FIG. 9 is a longitudinal sectional view showing a state in which the lid plate is installed on the upper surface of the adjustment support with the elastic packing material in a compressed state.

FIG. 10 is a cross-sectional view showing a state in which the lid plate is installed on the upper surface of the adjustment support with the elastic packing material in a compressed state.

FIG. 11 is a cross-sectional view showing a state in which a lid plate is supported by a support formed by curing a grout material.

FIG. 12 is a plan view showing a connection state between lid plates.

FIG. 13 is a cross-sectional view showing an example of a conventional lid-closing method for an open fire-resistant water tank.

FIG. 14 is a cross-sectional view showing another example of a conventional lid-closing method for a lidless fire prevention water tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Construction 2 Standing wall 3 Upper end open part 4 Lid plate 5 Standing wall upper end 15 Adjustment support 16 Adjustment piece 21 Elastic packing material 27 Filling space

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-111820 (JP, A) JP-A-60-51273 (JP, A) JP-A-60-33947 (JP, A) 194 194 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E03B 11/10 B65D 90/08

Claims (7)

(57) [Claims] 1. A lid closing method for closing an upper end open portion of a structure provided with a standing wall opposed thereto with a lid plate made of precast concrete, wherein the upper end of the standing wall is provided in accordance with a height difference of an upper end of the standing wall of the structure. In addition, a plurality of adjusting supports of a required height are installed at a required interval, and the upper surface of each adjusting support is located on a surface of substantially the same height raised from the upper end of the upright wall, and When the cover plate is placed on the upper surface of the adjustment support, an elastic packing material is interposed in an elastically compressed state between the inner and outer side portions of the upper end of the upright wall so as to sandwich the adjustment support therebetween. A method for closing a structure having an open top end, wherein a filling space is formed between the packing material, the upper end of the upright wall, and the lower surface of the lid plate, and then the filling space is filled with a grout material. 2. A lid closing method for closing an open upper end portion of a structure having a standing wall provided opposite thereto with a cover plate made of precast concrete, wherein the highest height is set according to a height difference of an upper end of the standing wall of the structure. Along with installing the adjustment support of the required height in a high part, the upper surface height of the adjustment support to be installed in another part of the upper end of the standing wall is set to be substantially the same as the upper surface height of the adjustment support, When the cover plate is placed on the upper surface of the adjustment support, an elastic packing material is interposed in an elastically compressed state between the inner and outer side portions of the upper end of the upright wall so as to sandwich the adjustment support therebetween. A method for closing a structure having an open top end, wherein a filling space is formed between the packing material, the upper end of the upright wall, and the lower surface of the lid plate, and then the filling space is filled with a grout material. 3. A lid closing method for closing an upper end opening portion of a building provided with a standing wall opposed to each other with a cover plate, wherein a portion of the building having the highest height according to a height difference of an upper end of the standing wall. In addition to installing the adjustment support of the required height in, the upper surface height of the adjustment support to be installed in another part of the upper end of the upright wall is set substantially equal to the upper surface height of the adjustment support, and An elastic packing material is attached to the inner and outer side portions so as to sandwich the adjustment support therebetween, and an upper end of the elastic packing material projects upward from the upper surface of the adjustment support, and thereafter, the elastic packing The lid plate is elastically compressed and the lid plate is placed on the upper surface of the adjustment support, whereby a filling space is formed between the inner and outer elastic packing materials, the upper end of the upright wall, and the lower surface of the lid plate. It is characterized by filling grout material into the space To open the top of the building. 4. In a case where the structure is an open-top container, the elastic packing material is continuously attached in a circumferential direction on inner and outer side portions of an upper end of an upright wall of the container, and thereafter, the open-end portion of the container is opened. 4. The method of claim 3, wherein the lid is closed with a lid plate. 5. A gap between the adjusting support provided at the upper end of the upright wall and the inner and outer elastic packing materials is formed so as to allow the grout material to pass when the elastic packing material is in a compressed state. The method for closing a structure having an open top end according to any one of claims 1 to 4. 6. The lid for an open-top construction according to claim 1, wherein the adjustment support is formed by stacking a plurality of types of adjustment pieces having different thicknesses. Construction method. 7. A stopper plate is provided on a lower surface of the cover plate so as to protrude in proximity to an inner edge of an edge portion of the cover plate covering an upper end of the standing wall of the building, and the stopper plate is brought into contact with an inner surface of the standing wall to thereby cover the cover plate. 7. The method for closing a structure having an open upper end according to any one of claims 1 to 6, wherein the structure is configured to prevent displacement.