JPH0941434A - Structure of simplified cistern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide structure of simplifier cistern which is designed so as to effectively utilize an inner capacity of an excavated hole and safety utilize the ground at ordinary times, and also realize its construction at a low cost. SOLUTION: A water barrier sheet 1 is laid on an inner wall of an excavated hole 5 to constitute a cistern in the ground, and beam members 2 vertically superposed to each other are stacked in parallel crosses in a plurality of positions of the cistern bottom part to constitute a plurality of strut parts 3 in mutually separated state. The excavated hole 5 is blocked by a lid-like body 4 supported by the strut parts 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a structure of a simple water tank for use in emergencies such as replenishment of water in a drought period and fire prevention in case of an earthquake disaster.

[0002]

2. Description of the Related Art Generally, a water cistern constructed for this kind of purpose uses a box culvert, and the construction site uses a park or an idle land. The device is designed to cover the ground and use the ground.
However, since it is a full-scale construction, there is a problem that the construction cost is high. Therefore, drilling holes in the ground, spraying mortar on the inner wall of the drilling holes to form a base, and laying a water-blocking sheet on it to form a water tank, and at the same time, inside the water tank A method of embedding gravel and storing water by using voids between gravel is also adopted. Furthermore, Japanese Patent Publication 4-35
According to Japanese Patent Publication No. 580 or Japanese Patent Publication No. 26048/1992,
A method has also been proposed in which a partition frame or a container-shaped member is erected on the inner bottom of the water storage tank as described above, and the lid is supported by the partition frame or the container-shaped member.

[0003]

Although the above-mentioned conventional construction method for embedding gravel is low in cost per unit volume,
There is a drawback that the water storage capacity is less than 40% of the volume of the drilled hole. For this reason, in order to secure the required water storage capacity, it is necessary to form a larger open hole and waterproof the inner wall of the hole, which eventually leads to an increase in cost and an increase in cost. Further, the conventional method of supporting the lid with the partition frame or the container-shaped member is not only complicated and expensive to manufacture and construct, but also limited in terms of water storage capacity.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. An object of the present invention is to make effective use of the internal volume of an excavated hole and to make it possible to use the ground on a ground during normal times. The purpose of the present invention is to provide a structure of a simple water storage tank which has stable support and can be easily constructed at low cost.

[0005]

Therefore, according to the first aspect of the present invention, the water impervious sheet 1 is installed on the inner wall of the excavation hole 5, as is clear from the embodiment shown in FIGS. , Constructing a water storage tank in the ground, stacking beam members 2 vertically overlapping with each other at a plurality of positions on the bottom of the water storage tank in a girder-like shape, and forming a plurality of pillar portions 3 in a state of being separated from each other,
The open-cut hole 5 is closed by the lid-like body 4 supported by the column 3.

In this case, the beam member 2 is used.
Is a beam portion 2a in which overlapping portions 2c having through holes 2b are formed at both ends, and through columns 8 penetrating the upper and lower beam members 2 are inserted into the through holes 2b. Also,
As in the invention of claim 3, when they intersect with each other and are vertically stacked, the concave and convex fitting portions 2d-1 and 2d are fitted to each other vertically.
2 (first embodiment of FIGS. 3 to 5), 2d-3 (FIGS. 6 to 5)
The second embodiment shown in FIG. 8 may be formed near both ends. By forming at least one of the through hole and the concavo-convex fitting portion as described above, the position of the beam members 2 stacked due to vibration does not shift during the stacking operation of the beam members 2, and the position of the beam members 2 stacked due to vibration shifts. Danger is prevented.

According to the fifth aspect of the invention, as is clear from the embodiment shown in FIGS. 9 to 13, the water blocking sheet 1 is installed on the inner wall of the excavation hole 5 to form a water tank in the ground. ,
The overlapped part material 101 which is overlapped with each other at a plurality of positions on the bottom part of the water tank and the overlapped part material 101 which is laterally adjacent
A support portion 103 is formed at the bottom of the water tank by a beam portion member 102 connecting the portions, and the open-cut hole 5 is closed by the lid-like body 4 supported by the support portion 103.

According to the sixth aspect of the present invention, the fitting groove 101a is formed on the outside of the overlapping member 101, and the fitting groove 101a is formed.
The fitting portion 102a at the end of the beam portion material 102 is fitted to. Further, according to the invention of claim 7, a through hole 101b penetrating vertically is formed in the overlapping member 101, and a through column is inserted into the through hole 101b.

In the method of constructing a simple water storage tank according to each invention of the present application, as shown in FIG. 1, an excavation hole 5 is bored in the ground,
Mortar is sprayed on the inner wall of the excavation hole 5 to form the base 6, and the water-blocking sheet 1 is stretched thereon to form a water storage tank. In the inventions of claims 1 to 4 (see FIGS. 1 to 8), the beam members 2 are assembled in order from the bottom to the pillars 3 at predetermined positions on the bottom of the water storage tank configured in this manner to form the support columns 3. The open hole 5 is closed by the lid-shaped body 4 in a state of being supported by the upper surfaces of the pillars 3 that are configured and are at the same level. In addition, in the invention of claims 5 to 8 (see FIGS. 9 to 13), the overlapping part members 1 are sequentially arranged from the bottom at a plurality of predetermined positions on the bottom of the water storage tank.
No. 01 is placed and is dropped from above into the fitting groove 101a of the overlapped part member 101 adjacent to the side,
02 The fitting portion 102a at the end is fitted to each lap portion material 10
1 are connected in the shape of a cross, and in this way, the overlapping part material 101
And the beam part member 102 are superposed upward to form a support part 103 connected in a lattice shape, and the support part 10 is at the same level.
The open hole 5 is closed by the lid-like body 4 while being supported by the upper surface of each overlapping portion material 101 of No. 3 of FIG.

Since the beam member 2, the overlapping member 101 and the beam member 102 are waste plastic materials or molded products of waste plastic materials and other materials, they are environmentally friendly and can be constructed at low cost.

[0011]

Therefore, according to each invention of the present application, by design, the opening area of the excavation hole 5, that is, the projecting area of the lid-like body 4, the height of the column portion 3 or the supporting portion 103, and the number of installed portions are set. By taking into consideration the amount of the beam member 2 or the overlapping part member 101 and the beam part member 102 required to be secured, it is possible to secure a sufficient amount of water storage at the lowest cost, and also to secure the sufficient amount of water on the water tank. Allows for normal use.

[0012]

Embodiments of the present invention will now be described based on the illustrated embodiments.
This will be specifically described. 1 to 5 show the first embodiment.
As shown in the figure, the structure of the simple water storage tank according to the first embodiment is such that the water shield sheet 1 is installed on the inner wall of the excavated hole to form the water storage tank in the ground, and the beam members are fitted to each other vertically. Two
Is stacked on the bottom of the water storage tank in a cross girder to form a column 3, and a lid-like body 4 as a floor plate supported by the column 3
The excavated hole is closed. The support columns 3 are installed at a plurality of positions on the bottom of the water tank in a state of being separated from each other, and the upper surfaces of the plurality of support columns 3 are set to substantially the same level on which the lid-shaped body 4 is placed.

In this construction, first, an opening hole 5 is drilled in the ground, and mortar is sprayed on the inner wall of the opening hole 5 to form a base 6, and if necessary, a protective layer 7 is provided on the base 6. ,
Further, the water-blocking sheet 1 is stretched on the water-permeable sheet to form a water tank, and as described above, the beam member 2 is vertically assembled in the water tank bottom portion in a disassembleable state in a cross beam shape. The pillar portion 3 is constituted by and the open hole 5 is closed by the lid-shaped body 4 as a floor plate while being supported by the pillar portion 3. In this embodiment, sand 9 is spread over the lid-like body 4 with a required thickness.

As a concrete example of the above construction, a hole (pond) having a length of 4 m, a width of 6 m, and a depth of 4 m is prepared as the excavation hole 5, and concrete mortar is sprayed on its inner wall. As the water shield sheet 1, a polyvinyl chloride sheet is stretched. If necessary, a subbing layer such as a urethane foam sheet may be provided as the protective layer 7 between the mortar base and the water shield sheet 1.

In this case, the beam member 2 employed has, for example, a cylindrical shape having through holes 2b at both ends of a beam portion 2a having an elongated round bar or square rod shape, as shown in FIGS. The overlapped portion 2c (which may be a square, a triangle, etc.) is formed, and the through column 8 penetrating the upper and lower beam members 2 is inserted into the through hole 2b. You don't have to. The upper and lower surfaces of the overlapping portion 2c are provided with concave and convex fitting portions 2d-1 and 2d-2, which are radial grooves and protrusions having a negative shape or a cross shape so that they can be fitted to each other. Is good. The concavo-convex fitting portion may be formed by a protrusion and a concave hole.

6 to 8 show a second embodiment. Second
In the embodiment, the beam member 2 is formed of a square bar, and when the beam member 2 crosses each other and is vertically stacked, the beam member 2 is fitted with each other. It is formed so as to extend entirely in the width direction above and below the vicinity of both ends of the member 2.

In the structures of the water storage tanks according to the first and second embodiments, the strut portions 3 can be properly formed simply by assembling the beam members 2 on the girders at the bottom of the water storage tank having the inner wall covered with the water blocking sheet 1. Since the opening portions of the excavation holes 5 can be stretched with the lid-shaped body 4 by using the pillar portions 3 as a support, the required water storage amount, for example, 90 m ³ ( A water tank having a total volume of 96 m ³ ) can be constructed, and moreover, the support of the lid-like body 4 is stable, and the floor can be effectively used in normal times.

9 to 13 show a third embodiment. In this embodiment, a lap portion material 101 is provided at a plurality of positions on the bottom portion of the water tank by superposing them on top of each other and a beam portion member 102 for connecting between the lap portion materials 101 adjacent to each other in a lateral direction to form a grid pattern on the bottom portion of the water tank. The support part 103 connected is comprised.
The open hole 5 is closed by the lid-like body 4 supported by the support portion 103. As shown in FIGS. 11 and 12, the overlapping portion material 101 has a block shape such as a disk shape,
A through hole 101b is formed in the center thereof, and a dovetail-shaped fitting groove 101a opening to the outside and the upper surface is formed in the cross direction in the flange portion 101c on the intermediate outer periphery. Also,
As shown in FIG. 13, the beam part material 102 has a columnar shape such as a square shape, and has fitting portions 102a for dovetail fitting with the fitting groove 101a at both ends. The side wall surfaces of the fitting groove 101a and the fitting portion 102a are inclined surfaces that allow vertical attachment / detachment but engage in the longitudinal direction. However, even if both side wall surfaces are inclined surfaces, only one side wall surface is formed. May be an inclined surface. The tip surface of the tip fitting portion 102a of the beam member 102 is
It has an arcuate shape along the circular outer circumference of the boss portion 101d protruding above the flange portion 101c of the overlapping portion material 101. The plurality of overlapping part members 101 that are vertically stacked
In the through holes 101b of some or all of the
1 A through post 8 for preventing slippage is inserted. Through pillar 8
Is made of plastic, FRP pipe, rustproof iron pipe, or the like.

Although the fitting groove 101a is formed in a cross direction, a diagonal fitting groove is formed to form the beam portion member 10.
The connection strength of the support portion 103 is improved by connecting the two in a bracing manner. Further, in order to prevent the beam part material 102 from being lifted up by water in the simple water storage tank, an adhesive agent or a wedge can be used. Further, a cylindrical member 104 (see FIG. 10) may be interposed between the boss portions 101d of the upper and lower overlapping portion members 101 to press the lower beam portion member 102.

In each of the above embodiments, the beam member 2,
As the material of the overlapping part material 101 or the beam part material 102, a waste material of a synthetic resin, that is, a waste plastic material or a molded product of a waste plastic material and another material can be reused, so that cost reduction can be effectively realized. It is also excellent in terms of environmental protection. As this waste plastic material,
A thermoplastic resin (PVC, PP, PE, PS, etc.) can be used, and a structure including a core such as a reinforcing bar may be used.

[0021]

The present invention is as described above in detail,
While constructing a water storage tank in the ground by installing a water blocking sheet on the inner wall of the excavated hole, stacking beam members that fit vertically with each other or overlapping part materials that vertically stack, are stacked at a plurality of positions on the bottom of the water storage tank. A support portion 10 in which a plurality of pillar portions 3 or overlapping portion members that are separated from each other are connected in a grid shape by beam portion members.
3, the lid-shaped body supported by the support column 3 or the support portion 103 closed the open-cut hole, so that the open-hole area of the open-cut hole, that is, the area where the lid-like body extends and the weight are designed. , And the height of pillars or supports, and the amount of beam members or overlapping parts and beam parts necessary to secure the number of installations, the lowest cost and sufficient water storage capacity. It is possible to secure the water quality and to use it on a water tank in normal times.

The bottom of the lid-like body is supported at a plurality of positions by a plurality of girder-like support columns or supporting portions connected in a grid pattern, and the bottom of the lid-like body is supported with a wide area. Therefore, the impact applied to the lid-like body is dispersed and alleviated, and the support is stable and excellent in safety.

The support columns 3 are spaced apart from each other, the beam members thereof are vertically spaced apart from each other, and the support portions 103 are formed in a lattice pattern, and the beam members are vertically spaced apart from each other. Therefore, a sufficient storage volume can be secured.

In the construction, the beam member or the block-shaped beam member or the overlapping member and the beam member can be successively polymerized from the bottom of the water storage tank to surely carry out the operation, and the work is easy and efficient. It is easy to manage and handle parts and transport them to the site.

Further, as the material of the beam member 2 or the overlapping part material 101 and the beam part material 102, by reusing a waste plastic material or a molded product of a composite of a waste plastic material and another material, cost reduction is effective. Can be realized in real time, and it is also excellent in environmental protection.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional side view showing a first embodiment of the present invention.

FIG. 2 is likewise a schematic plan view.

FIG. 3 is likewise a plan view of an embodiment of a beam member.

FIG. 4 is also a side view.

FIG. 5 is a side view showing a state where beam members are assembled in a cross beam shape.

FIG. 6 is a plan view of a beam member according to a second embodiment of the present invention.

FIG. 7 is also a side view.

FIG. 8 is likewise a side view showing a state in which beam members are assembled in a cross beam.

FIG. 9 is a schematic plan view showing a third embodiment of the present invention.

FIG. 10 is also a side view showing a part of the support portion.

FIG. 11 is also a plan view of the overlapping portion material.

FIG. 12 is likewise a side view of the overlapping material.

FIG. 13 is a plan view (A), a front view (B) and a side view (C) of the beam part material.

[Explanation of symbols]

1 Impermeable Sheet 2 Beam Member, 2a Beam Part, 2b Through Hole, 2c
Overlap part, 2d-1, 2d-2, 2d-3 Fitting part 3 Strut part 4 Lid-like body 5 Opening hole 6 Underlayer 7 Protective layer 8 Through column 9 Sand 101 Overlap part material, 101a Fitting groove, 101b
Through hole, 101c Flange part, 101d Boss part 102 Beam part material, 102a Fitting part 103 Support part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsukuni Ashino 1-2-4 Minamiaoyama Minato-ku, Tokyo Obayashi Road Co., Ltd.

Claims (8)

[Claims] 1. A water-blocking sheet is installed on the inner wall of the excavated hole to form a water reservoir in the ground, and beam members that are fitted to each other vertically are stacked at a plurality of positions on the bottom of the water reservoir in a cross beam shape. A structure of a simple water storage tank, wherein a plurality of support columns are formed in a state of being separated from each other, and the open-cut holes are closed by a lid-shaped body supported by the support columns. 2. The beam member has overlapping portions having through holes formed at both ends of the beam portion, and through columns penetrating the upper and lower beam members are inserted into the through holes. The structure of the simple water tank according to claim 1, wherein 3. The beam member according to claim 1, wherein when the beam member intersects with each other and is vertically stacked, concave and convex fitting portions that fit vertically are formed near both ends. Structure of a simple water tank. 4. The structure of the simple water tank according to claim 1, wherein the beam member is a waste plastic material or a molded product made of a waste plastic material and another material. 5. A water-blocking sheet is provided on the inner wall of the excavated hole to form a water tank in the ground, and the overlapping parts provided by stacking vertically at a plurality of positions on the bottom of the water tank and laterally. A support member is formed at the bottom of the water tank by a beam member that connects adjacent overlapping members, and the open-cut hole is closed by a lid-like member supported by the support member. Construction. 6. A fitting groove is formed on the outer side of the overlapping portion material, and a fitting portion of the end portion of the beam portion material is fitted in the fitting groove. Structure of the simple water tank described in. 7. The simplified water tank according to claim 5 or 6, characterized in that a through hole is formed in the upper and lower parts of the overlapping member, and a through column is inserted into the through hole. Construction. 8. The simplified water storage tank according to claim 5, wherein the overlapping part member and the beam part member are molded products made of waste plastic material or waste plastic material and other materials. Construction.