JP2589989Y2 - Water retention block for rainwater infiltration basin - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a water retention block for a rainwater infiltration basin installed around a rainwater infiltration basin for temporarily storing drainage from the rainwater infiltration basin in a rainwater infiltration basin for storing rainwater. It is about.

[0002]

2. Description of the Related Art In the case of heavy rainfall, even if a rainwater infiltration basin is installed, it is impossible to accumulate a predetermined amount of water in a concrete rainwater infiltration basin. It is common to install a water retention block around the rainwater infiltration basin for temporary storage. A conventional water retention block for a rainwater infiltration basin has a housing portion that substantially conforms to the outer shape of the rainwater infiltration basin, a base block installed at the bottom of the rainwater infiltration basin, and a body surrounding the side circumference of the rainwater infiltration basin. Each block is composed of a mixture of gravel or crushed stone and a relatively small amount of raw concrete, and molding the mixture in a predetermined mold to bond the gravel or crushed stone with concrete. It was molded. The water accumulated in the rainwater infiltration basin penetrates from the bottom of the rainwater infiltration basin into the gap between the gravel or crushed stones in the foundation block, and is drained from a drain hole formed in the side circumference of the rainwater infiltration basin. It is infiltrated and stored in the gap between the gravel and crushed stone in the body block. The water stored in the water retention block as described above is gradually discharged from the water retention block by penetrating into the ground.

[0003]

The conventional water retention block for a rainwater infiltration basin is heavy and very inconvenient to handle since it is made of concrete made of gravel or crushed stone as described above. Due to the weight, there was a disadvantage that some parts were easily missing during transportation or construction. In addition, there is a disadvantage that the collection of gravel or crushed stones causes the devastation of riverbeds and mountain surfaces. Further, the only way to increase the water holding capacity is to increase the volume of the water holding block, but the conventional water holding block cannot be increased due to its heavy weight.
The purpose of the present invention is to solve the above-mentioned problems, to be much lighter and easier to handle than conventional water retention blocks, and therefore to increase the volume thereof, and to make effective use of waste materials such as buildings. Another object of the present invention is to provide a more economical water retaining block.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a water retaining block for a rainwater infiltration basin according to the present invention is obtained by bonding a large number of pellets mainly composed of a hard synthetic resin foam material by concrete. Things. The hard synthetic resin foam material is preferably obtained by crushing waste materials such as heat insulating materials used in buildings to an average particle size of 30 mm or less, mixing a small amount of raw concrete, and bonding them with a predetermined mold. Molding. The hard synthetic resin foam pellets are mainly used, and all of them may be synthetic resin foam pellets, or pellets of crushed stones or other materials are mixed in some of them. No problem.

[0005] The water retention block is composed of a foundation block installed at the bottom of the rainwater infiltration basin and a body block installed to surround the side circumference of the rainwater infiltration basin. It is preferable that it is composed of divided blocks divided in two directions. The torso block,
A drain pipe for rainwater and an overflow pipe are provided above the center in the vertical direction at a symmetrical position of the side circumference, and a pipe for the drain pipe and an overflow are provided. The pipe section of the pipe is formed to be thinner than the other part, and the split mold is a split type in which the pipe section of the drain pipe and the pipe section of the overflow pipe are bisected. Is preferred. The entire circumference of the base block or at least the outer circumference of the trunk block,
It is preferable to be covered with a net made of metal or synthetic resin, or to cover all or a part of the periphery of the base block or the trunk block with a mortar layer.

[0006]

[Action] The water retention block for rainwater infiltration basins according to this invention is:
As described above, a large number of pellets mainly composed of a hard synthetic resin foam material are bonded and molded by concrete, and are much lighter than conventional water retention blocks, and therefore are very easy to handle and handle. It is possible to manufacture a water retention block that is hard to be partially removed and has a larger volume. In addition, in various construction works, a large amount of insulating material made of synthetic resin foam is used,
Utilizing the waste material provides a more economical water retention block.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a water retention block for a rainwater infiltration basin according to the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a sectional view of a construction of a water retention block for a rainwater infiltration basin according to an embodiment of the present invention, FIG. 2 is a perspective view of a trunk block in the water retention block of FIG. 1, and FIG. 3 is a trunk block of another embodiment. It is a perspective view of one of the divided blocks.

The water retention block of this embodiment is a concrete block.
Block 1 installed at the bottom of rainwater infiltration basin 3
And a trunk block 2 installed to surround the rainwater infiltration basin 3. The torso block 2 has a housing portion 22 that substantially matches the outer shape of the rainwater infiltration basin 3, and is installed in a state where the rainwater infiltration basin 3 is housed in the housing portion 22. The basic block 1 is a disk-shaped block formed into a substantially rectangular shape, and the outer shape of the body block 2 is substantially a cubic shape as a whole.

An opening 30 is formed in the upper part of the rainwater infiltration basin 3 so as to be able to be closed by dropping a lid (not shown), and a peripheral portion thereof communicates with a drain pipe 4 communicating with a rain gutter (not shown). The hole 31 and the communication hole 32 of the overflow tube 5 are provided at symmetric positions, and an appropriate number of small-diameter drain holes 33 are provided.

As shown in FIGS. 1 and 2, above the longitudinally central portion of the side circumference of the body block 2, the pipe portion 23 of the drain pipe 4 and the overflow pipe 5 are symmetrically located. Piping section 2
4, and both the pipe portions 23 and 24 are formed to be thinner than the other portions. The body block 2 is composed of divided blocks 20 and 21 that are divided into two along the longitudinal direction so as to bisect the portions of the pipes 23 and 24. 21 in combination.

The divided blocks 20 and 21 in the base block 1 and the trunk block 2 are made of waste heat insulation material such as polystyrene foam or styrene foam generally used in buildings, and the average grain size is used. The pellets a are crushed to a diameter of about 30 mm to form pellets a. An appropriate amount of raw concrete is mixed with the large number of pellets a, and the mixture is filled into a mold (not shown) having a predetermined shape and is bonded to each other. The pellet a is not limited to the material of the above-described embodiment as long as it is a hard synthetic resin foam material. The pellet a is mixed with a material other than gravel, crushed stone, or other synthetic resin foam material. No problem.

After molding as described above, the torso block 2
Each of the divided blocks 20 and 21 is coated with a synthetic resin or metal net b on the outer peripheral portion thereof so that the pellet a at the corner or the peripheral portion of the block does not peel off during transportation or other handling. Is preferred. This net b is
Block 20, by spraying raw concrete
More preferably, the toner image is fixed to the outer peripheral surface 21. Net b
Covers the basic block 1 as well.

In order to install the rainwater infiltration basin 3 using the above-mentioned water retaining block, a hole (not shown) of a predetermined size is dug in the ground c, the bottom of the hole is leveled, and the foundation block 1 is installed. A concrete basin 34, a thin bottom plate 10, and a rainwater infiltration basin 3 are set in the storage section 22 of the unit block 2,
These are lowered to the upper center of the base block 1, drainage pipes 4 and overflow pipes 5 are piped, soil is buried around the water retention block, and a cover (not shown) is placed on the opening 30 of the rainwater infiltration basin 3. Close. Like the base block 1, the bottom plate 10 is formed by bonding and molding a large number of pellets of a synthetic resin foam material with ready-mixed concrete. The thin-walled pipe portions 23 and 24 of the body block 2 are cut in advance so that the pipes 4 and 5 can be piped.

The water retention block of this embodiment is very light because its main material is a pellet made of synthetic resin foam, and is extremely easy to handle during transportation and construction. There is little to be missing. In addition, because of its light weight, the water retention block can be enlarged to produce a water retention block having a large water retention capacity. The water collected in the rainwater infiltration basin 3 is retained in the gap between the pellets a in each of the blocks 1 and 2 through the bottom plate 10 and the drain holes 32, and the small holes of the pellets a made of foam material are closed. Unless the foam pellet a
It also retains water. Therefore, the water retention capacity increases as long as it is performed. The water retained in each of the blocks 1 and 2 gradually penetrates into the ground.

In the above embodiment, blocks 1, 20, 21
The outer periphery of the block 21 is covered with the net b. Instead of such a configuration, for example, as shown in FIG.
The same effect can be obtained by coating with.

[0016]

The water retention block for a rainwater infiltration basin according to the invention is much lighter and easier to handle than a conventional water retention block, so that its volume can be increased. Another object of the present invention is to provide a more economical and low-cost water retention block by effectively utilizing a heat insulating material and other waste materials of a synthetic resin foam used for building materials and the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a construction state showing an embodiment of a water retention block for a rainwater infiltration basin according to the present invention.

FIG. 2 is a perspective view of a trunk block in the water retaining block of FIG. 1;

FIG. 3 is a perspective view of one divided block of a trunk block showing another embodiment. DESCRIPTION OF SYMBOLS 1 Basic block 10 Bottom plate 2 Trunk block 20 and 21 Dividing block 22 Storage part 23 and 24 Piping part 25 Mortar layer 3 Rainwater infiltration basin 30 Opening 31 and 32 Communication hole 33 Drainage hole 34 Masudai a Pellet b Net c Ground

Claims (5)

(57) [Scope of request for utility model registration] 1. A water retention block installed to surround a rainwater infiltration basin buried in the ground, the storage block having a housing portion substantially conforming to the outer shape of the rainwater infiltration basin, and mainly made of a hard synthetic resin foam material. A water retention block for a rainwater infiltration basin, wherein a large number of pellets as materials are bonded and molded by concrete. 2. The water retention block is composed of a base block installed at the bottom of the rainwater infiltration basin, and a trunk block installed to surround a side circumference of the rainwater infiltration basin,
2. The water retention block for a rainwater infiltration basin according to claim 1, wherein the trunk block is constituted by a divided block divided into two in a vertical direction. 3. 3. The body block has a pipe portion of a drain pipe for rainwater or the like at a position above a central portion in a vertical direction to a side portion, and the pipe portion is formed thinner than other portions. The water retention block for a rainwater infiltration basin according to claim 2, wherein the division block is a division block that bisects the thin-walled pipe portion. 4. The water retention block for a rainwater infiltration basin according to claim 2, wherein the entire circumference of the base block or at least the outer circumference of the trunk block is covered with a net. 5. The water retention block for a rainwater infiltration basin according to claim 2, wherein all or a part of a peripheral edge of the base block or the trunk block is covered with a mortar layer.