JP2000213014A - Multilayer type underground water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive multilayer type underground water storage tank capable of being constructed simply, quickly, and easily so as to shorten construction term greatly and storing by far a larger amount of water than a conventional water storage tank. SOLUTION: This multilayer type underground water storage tank consists of precast concrete blocks in which leg parts 12 are formed in four corner parts of a square ceiling plate 11 in which an opening part 10 is formed and is fixed on concrete foundation at water storage tank installation site. It consists of first blocks 1 piled up at many steps and a precast concrete block in which leg parts 15 are formed in four corner parts of a square ceiling plate 13 and consists of a plurality of laminating bodies 8 of a second block 2 which is put and fixed on the ceiling plate 11 of the first block 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer underground water tank as a regulating pond for temporarily storing a large amount of rainwater in an urban area with a paved road.

[0002]

2. Description of the Related Art Demand for underground water storage tanks using precast concrete blocks, which are known for being economical and can be constructed more easily than conventional underground water storage tanks made of cast-in-place concrete, can be greatly shortened, is rising. . As an underground water storage tank using precast concrete blocks,
There are devices and inventions described in Japanese Utility Model Publication No. 2-34306 and Japanese Patent No. 2504690.

[0003]

However, in such a conventional underground water storage tank, precast concrete blocks must be produced at a factory and transported to the site. The size of the precast concrete block for constructing the underground water storage tank is limited because the size that can be transported is limited because the size that can be transported is limited. In all cases, the depth is almost the same, and there is an inconvenience that the depth of the underground water storage tank cannot be largely changed in order to improve the water storage amount.

Therefore, the present invention provides a multi-layered underground water storage tank which can be simply constructed, can greatly reduce the construction period, is economical, and can greatly increase the amount of water storage as compared with the conventional one.

[0005]

In order to achieve the above object, according to the present invention, legs are formed at four corners of a rectangular top plate having an opening. A first block comprising a precast concrete block, which is fixed to a concrete foundation at a water tank setting place or stacked in multiple stages, and a precast concrete block in which legs are formed at four corners of a square top plate; A multilayer underground water storage tank comprising a laminate with a second block mounted and fixed on a top plate.

According to a second aspect of the present invention, legs are formed at two corners on one side of two opposite sides of a rectangular top plate having an opening, and two corners on the other side are formed. A third block, which is formed of a concrete block having a connecting wall leg and is fixed to a concrete foundation at a reservoir setting place or stacked in multiple stages and arranged outside the first block, and a square top plate, And a fourth block formed of a concrete block having a wall leg connecting the two corners of the other side with a leg formed at one corner of the two sides. It is a multi-layer underground water tank.

[0007] According to a third aspect of the present invention, the first device
It is a multilayer underground water storage tank characterized by being constituted by a laminate of a block and a fourth block.

[0008] According to a fourth aspect of the present invention, the third type is provided.
It is a multilayer underground water tank comprising a laminate of a block and a second block.

Further, as set forth in claim 5, there is provided a multi-layered underground water storage tank comprising a mixture of the first to fourth blocks.

Therefore, basically, the depth as a water storage tank is increased by constructing a multi-layered underground water storage tank using at least two types of precast concrete blocks of a size that can be transported by a truck or the like. It is possible to reduce the construction period and economical efficiency by forming a multilayered underground water tank with a cubic shape of at least two or more layers by laying a plurality of laminates in a square at the reservoir setting place and arranging at least two layers. Can be planned.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The first block 1 and the second block 2 according to the present invention are shown in FIG.
2 is shown in FIG. 2, and a third block 4a and a fourth block 4a are shown in FIGS.

In FIG. 1, a first block 1 has an opening 1
It is made of a precast concrete block in which legs 12 are formed at four corners of a square top plate 11 in which 0 is formed. Second
The block 2 is made of a precast concrete block in which legs 15 are formed at four corners of a square top plate 13. The top plate 13 has the same length L and width W as the top plate 11,
The height H ₁ of the legs 15 are slightly shorter than the height H of the leg portion 12. The second block 2 is basically stacked on the first block 1 to form a laminate 8.

In FIG. 2, the third block 3 has an opening 2
From the concrete block formed with legs 22 and 22 at two corners on one side of two opposite sides of a square top plate 21 formed with 0 and a wall leg 23 connecting the two corners on the other side. Become. The fourth block 4 is a concrete block in which legs 25, 25 are formed at two corners on one side of two opposite sides of a rectangular top plate 24, and a wall leg 26 connecting the two corners on the other side is formed. Consists of The top plate 24 has the same vertical length L and horizontal length W as the top plate 21, but the height H _{1 of the} leg portion 25.
Are formed slightly shorter than the height H of the leg 22. 4th
The block 4 is stacked on the third block 3 to form a laminate 8
a is basically formed.

In FIG. 3, a third block 3a and a fourth block 4a are formed by forming wall legs 23 and 26 on the vertically long side of the top plates 21 and 24, respectively. The difference is that wall legs 23 and 26 are formed on the horizontally long sides of the top plates 21 and 24, respectively. The top plate 24 has the same length L and width W as the top plate 21, but the leg 2
The height H _{1 of} 5 is slightly shorter than the height H of the leg 22. The fourth block 4a is basically stacked on the third block 3a to form a laminate 8b.

The third blocks 3 and 3a are the same in size as the first block 1 and the fourth blocks 4 and 4a are the same in size as the second block 2, and the top plates 11, 13, 21 and 24 are vertically long L and horizontally long. W is all the same. Each of the first to fourth blocks 4 and 4a is formed as a precast concrete block, so that reinforcing reinforcements such as reinforcing bars are incorporated therein so that required strength can be maintained. Alternatively, a suitable connecting or engaging means for connecting those closely aligned in the left-right direction is provided in a usual way.

For example, the top plate 11 and the leg portion 12, the top plate 13 and the leg portion 15, the top plate 21 and the leg portion 22, and the top plate 21 and the top plate 21 are tightened when the blocks 1 to 4a are closely arranged. A through hole 9 through which a PC steel rod is to be inserted is inserted into each intersection of the wall leg 23, the top plate 24 and the leg 25, and the intersection of the top plate 24 and the wall leg 26 (see the phantom line diagram of the first block 1 in FIG. 1, The other blocks 1 to 4a are not shown). In addition, it is preferable to embed inserts into which the hanging metal fittings and the like can be screwed in at the four corners of the top plates 11, 13, 21, and 24 (see the phantom line diagram of the first block 2 in FIG. 4a are not shown). further,
Reinforcing beams 27 (see phantom lines in FIG. 1) may be provided between the legs 12, 12, 22, 22 facing each other on the horizontally long W side.

A first example in which an underground water storage tank is constructed using the above-described blocks 1 to 4a will be described. First, as shown in FIGS. 5 and 6, a concrete foundation 31 on which a foundation stone 30 is laid is formed in a set place S such as a square where an underground water storage tank shown in FIG. on top of,
For example, a row a of a plurality of first blocks 1 is laid out, and rows b, b of the same number of third blocks 3 are laid out on both left and right sides of the row a, leaving gap rows c, c. Columns a,
b is formed by bringing the vertically long sides of the top plate 11 into contact with each other, and the gap rows c are substantially the same intervals as the vertically long sides L. Also,
The third blocks 3 are arranged with their wall legs 23 on the outermost side. To tighten the blocks 1 and 3 in the rows a and b, PC
A steel rod is inserted into the through holes 9, 9 and tightened with a jack or the like. In addition, if necessary, the adjacent leg portions 12 are appropriately connected to each other.

Next, as shown in FIGS. 4 to 6, a second block 2 and a fourth block 4 are stacked on the first block 1 and the third block 3 laid out as described above. 8 is formed. In this case, the first block 1 may be further stacked on the first block 1 and the second block 2 may be stacked on the uppermost first block 1. Then, the tops of the gap rows b, b are covered with the concrete slab cover 5, and as shown in FIG.
The opening portions 7, 7 at the beginning and end of b, c are closed by long concrete slab plate walls 6, 42. To tighten the blocks 2 and 4 in the rows a and b, a PC steel rod is inserted into the through holes 9 and 9 and tightened with a jack or the like. Further, if necessary, the adjacent leg portions 15 are appropriately connected to each other.

The concrete slab slab cover 5 is
4 has a horizontal length substantially the same as the horizontal length W, and a vertical length slightly larger than the vertical length L. The concrete slab plate wall 6 is long because it covers the open portion 7 formed on the vertically long side of the first and second blocks 1 and 2 and the third and fourth blocks 3 and 4. When the laminated body 8b is used in the second and third and fourth blocks 3a and 4a, that is, in FIG. When the portions 23 and 26 are laid out with the outermost portions arranged in the outermost direction, and the first and second blocks 1 and 2 are laid side by side with the horizontally long W in the direction of the row e so as to have gap rows every other row as in the previous example. It is shorter than that. However, the concrete slab plate wall 6 may be divided into appropriate lengths.

Thus, the row a of the laminate 8 of the first block 1 and the second block 2 having two or more layers, the rows b and b of the laminate 8a of the third block 3 and the fourth block, and the outermost layer are concrete slab plates. Closed by walls 6 and 42, and
A multi-layered underground water storage tank composed of a cube whose upper part is closed with a concrete slab plate lid 5 is formed. As described above, when the third blocks 3, 3a and the fourth blocks 4, 4a are arranged on the outermost sides of the two opposing sides of the rectangle surrounding the set place S, the first block 1 and the second block are disposed inside them. 2
The stacked bodies 8 may be arranged in every other row instead of in a row, that is, in a staggered arrangement, or in a grid pattern in which four sides contact each other.

In the above description, the first block 1
The outside of the set of the laminate 8 composed of the second block 2 and
Laminated body 8a composed of third block 3 and fourth block 4
The multilayered underground water storage tank was constructed by sandwiching the open portions 7, 7 with concrete slab plate walls 6, 42. The first block 1 and the second block 2 were laminated. Body 8, laminated body 8 a of third block 3 and fourth block 4, or third block 3 a and fourth block 4 a
The outermost open portion of the cube formed by the rows a and b consisting of only the laminates 8b is closed with a concrete slab plate similar to the concrete slab plate wall 6 or cast-in-place concrete to form a multilayer underground water tank. Can also be formed.

That is, the open portions formed on the four sides of a cubic formed of a single set of the laminates 8 to 8b are:
Unless it is desired to block with concrete slab slab walls or cast-in-place concrete, each of these blocks 1
4a are appropriately selected and used in combination, and when they are arranged to form a cubic shape in the set ground S, an open portion is formed by arranging the wall legs 23, 26 as far as possible on the outermost side. While being arranged so as not to be formed, the opening that should be formed inevitably shall be appropriately closed, and each block to be arranged inside surrounded by these outermost blocks will not stagnate the water storage Any combination (for example, a combination of the first block 1 and the fourth blocks 4 and 4a) is possible if care is taken not to form a partition wall at the wall legs 23 and 26 so as to circulate.

The leg 12 and the wall leg 23 are embedded and fixed in a concrete foundation 31 as shown in FIG.
Alternatively, a concrete plate having a concave portion into which the legs 12, 22 or the wall legs 23, 26 are fitted may be embedded in the concrete foundation 31. Further, the pair of legs 12, 15, 22, 25 adjacent to each other on the side of the horizontally long W may be appropriately connected by a beam member 27 (see FIG. 1) connecting the lower ends thereof. The concrete slab plate wall 6 is placed and fixed on the solidified concrete foundation 31 as shown in FIG. The concrete foundation 31 has appropriate reinforcing bars 32.

The concrete slab cover 5 is a top plate 2
4 as shown in FIG. 9 and FIG.
An anchor bolt 47 protrudes from the concrete slab cover 5 through an insert 46 through an insert 46, and the anchor bolt 47 is inserted into the through hole 44 of the recess 43 formed in the concrete slab plate cover 5.
9 is preferably fastened with an insertion nut 50. Further, it is preferable to form a support portion 45 in the concrete slab plate lid 5 to be in contact with the side surface of the top plate 24.

Further, the upper legs 15, 25 are preferably connected and fixed to the lower top plates 11, 21. For example, FIG.
As shown in FIG. 12, an anchor bolt 52 is protruded from an insert 51 embedded and fixed in the top plate 11,
A plate 53 through which the anchor bolt 52 is inserted is fixed to the lower end of the leg 15, and a nut 5 is attached to the anchor bolt 52.
4 is screwed and fastened. The plate 53 is appropriately connected to a reinforcing bar in the leg portion 15 and is exposed at a lower end surface. A cutout portion 55 is formed at an upper portion of the plate 53 as a space for fastening a nut 54.

Reference numeral 56 denotes a guide pin having a conical or polygonal pyramid at both ends, which is inserted into the conical or polygonal pyramid-shaped holes 57 and 58 formed in the lower end of the leg 15 and the top plate 11. The guide pin 56 is inserted into the hole 58 when the second block 2 is laminated on the first block 1 or when the fourth block 4 is laminated on the third block 3. 57 matches the second block 2 or the fourth block
Block 4 is positioned. 13 and 14, the wall leg 26 is fastened to the top plate 21 and the guide pin 56 is used. A sealing material may be interposed between the wall leg 26 and the top plate 21.

[0027]

According to the present invention described above, a multi-layered underground water storage tank having two or more layers is constructed by a laminate of the first block and the second block and a laminate of the third block and the fourth block. Therefore, the construction time can be reduced and the construction period can be greatly shortened, so that not only is the economy extremely high, but also the depth of the water storage tank can be set to a desired depth, and the amount of water storage can be greatly increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first block and a second block according to the present invention.

FIG. 2 is a perspective view showing a third block and a fourth block according to the present invention.

FIG. 3 is a perspective view showing another example of the third block and the fourth block according to the present invention.

FIG. 4 is a plan view showing an example of a multilayer underground water storage tank constructed by arranging a stacked body of first and second blocks and a stacked body of third and fourth blocks.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a right side sectional view of FIG. 4, and the right half shows a stacked body of first and second blocks.

FIG. 7 is an enlarged view in a circle shown by a in FIG. 5 and is a longitudinal sectional view showing an example of fixing a leg portion.

8 is an enlarged view in a circle shown by E in FIG. 6 and is a longitudinal sectional view showing an example of fixing a concrete slab plate.

9 is an enlarged view in a circle shown by B in FIG. 5 and is a longitudinal sectional view showing a joint structure of a concrete slab slab bridging between a fourth block and a second block.

FIG. 10 is a partial plan view of FIG. 9;

11 is an enlarged view in a circle shown by C in FIG. 5 and is a longitudinal sectional view showing a coupling structure between a leg portion and a top plate.

FIG. 12 is a sectional view taken along line YY of FIG. 11;

FIG. 13 is an enlarged view in a circle shown by d in FIG. 5 and is a longitudinal sectional view showing a coupling structure between a wall leg portion and a top plate.

14 is a sectional view taken along the line ZZ of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st block 2 ... 2nd block 3, 3a ... 3rd block 4, 4a ... 4th block 5 ... Concrete slab plate lid 6 ... Concrete slab plate wall 7 ... Opening part 8, 8a, 8b ... Laminated body 11, 13, 21, 24 ... Top plate 10, 20 ... Opening 12, 15, 22, 25 ... Leg 23, 26 ... Wall leg 31 ... Concrete foundation 32 ... Reinforcing

Claims (13)

[Claims] 1. A first block comprising a precast concrete block having legs formed at four corners of a square top plate having an opening, fixed to a concrete foundation at a reservoir setting place, or stacked in multiple stages; A multilayer underground water storage comprising a precast concrete block having legs formed at four corners of a square top plate, and a laminate with a second block mounted and fixed on the top plate of the first block. Tank. 2. A concrete block in which a leg is formed at two corners on one side of two opposite sides of a square top plate having an opening and a wall leg connecting the two corners on the other side. And a third block fixed to a concrete foundation at a reservoir setting place or stacked in multiple stages, and a leg formed at two corners on one side of two opposite sides of a square top plate, and the other side A multilayer underground water tank comprising a laminate with a fourth block made of a concrete block formed with a wall leg connecting two corners of the above. 3. A first block comprising a precast concrete block having legs formed at four corners of a square top plate having an opening, fixed to a concrete foundation at a reservoir setting place, or stacked in multiple stages; From a laminate with a fourth block consisting of a concrete block in which a leg is formed at two corners on one side of two opposite sides of a rectangular top plate and a wall leg connecting the two corners on the other side is formed. A multi-layered underground water tank characterized by becoming. 4. A concrete block in which a leg is formed at two corners on one side of two opposite sides of a square top plate having an opening and a wall leg connecting the two corners on the other side. And a third block fixed to a concrete foundation at a reservoir setting place or stacked in multiple stages, and a precast concrete block having legs formed at four corners of a square top plate, and a top plate of the first block. A multilayer underground water storage tank comprising a laminate with a second block mounted and fixed thereon. 5. A first block comprising a precast concrete block having legs formed at four corners of a square top plate having an opening, fixed to a concrete foundation at a reservoir setting place, or stacked in multiple stages; A laminate composed of a precast concrete block having legs formed at four corners of a square top plate, a second block mounted and fixed on the top plate of the first block, and a square top formed with an opening. It consists of a concrete block with legs formed at two corners on one side of two opposite sides of the plate, and a wall leg connecting the two corners on the other side, fixed to the concrete foundation at the reservoir setting ground. Or, while forming a leg in a third block that is stacked outside and arranged outside the first block and two corners on one side of two opposite sides of a rectangular top plate, A multilayer underground water tank comprising a laminate with a fourth block formed of a concrete block having a wall leg connecting the two corners on the other side. 6. The underground water storage tank according to claim 1, wherein a plurality of the stacked bodies are closely arranged vertically and horizontally to form a cubic aggregate. 7. The assembly according to claim 1, wherein a plurality of the stacked bodies are aligned in the horizontal direction at intervals of every other one.
6. The underground water storage tank according to any one of items 5 to 5. 8. The multilayered underground water storage tank according to claim 1, wherein rows of closely stacked bodies are spaced apart from each other and aligned. 9. The underground water storage tank according to claim 7, wherein a concrete slab cover is horizontally disposed at the uppermost part of the gap between the separated laminates. 10. The underground water storage tank according to claim 9, wherein the concrete slab slab has a support portion which is in contact with a shoulder of a block on the top floor. 11. The underground water storage tank according to claim 1, wherein an opening formed around the laminate or the aggregate thereof is closed by a concrete slab plate wall. 12. The underground water storage tank according to claim 1, wherein a reinforcing beam is formed by bridging between the lower portions of the legs. 13. The underground water storage tank according to claim 1, wherein the leg or the wall leg is embedded in a concrete foundation.