JPH1171789A - Rainwater storage device and structural member therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rainwater storage device and structural members for the reservoir which temporarily reserves rainwater to prevent an urban type flood and makes it penetrate into underground or uses it as water for vegetation. SOLUTION: Both side boards oppositely arranged are integrally connected by connecting parts 4b to use synthetic resin structural members 4 for a water reservoir and form a reservoir space 4c between both side boards. A large number of these structural members 4 are put together in the underground and the periphery thereof is surrounded by a water-permeable sheet 5 and the members are embedded in the ground to once hold rainwater and gradually make it penetrate into the depth of the ground, as this rainwater storage device A. The periphery of the structural members 4 for a water reservoir may be wrapped with an impervious sheet and a water conduction pipe may be connected thereto to constitute the reinwater storage device A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage device which is effective for temporarily storing rainwater or for penetrating the stored rainwater into the ground, and a water storage structural material used for the rainwater storage device.

[0002]

2. Description of the Related Art Recent housing development and construction of welfare facilities, etc.
In many cases, slopes such as hills such as mountainous areas and agricultural lands are built on residential lands.

Conventionally, such places are forests, grasslands, and arable land, so that rainwater easily penetrates into the ground, and accumulates in paddy fields. Therefore, even in the case of heavy rain, it is rare for the rainwater to flow in a short time. Was.

[0004] In recent years, however, in areas where development has progressed, much of the ground has been replaced by buildings, roads, parking lots, etc., which are made of concrete or asphalt. Also, rain falling on roads and parking lots flows down the surface into gutters, and gradually merges with small rivers into large rivers. In the past, large rivers flowing through urban areas were also wide enough to withstand floods.However, now, when heavy rain falls, the developed vast area of rain is collected in a short time and At present, the flow rate per unit time increases rapidly, causing frequent floods.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above, and in order to suppress the occurrence of so-called urban floods that frequently occur recently, rainwater is temporarily dispersed in various places, such as before development of residential land. Provide a rainwater storage device that can store and drain the stored water gradually with a time delay, infiltrate into the ground, or use the stored water for irrigation of plants such as car washing and gardens. It is an object of the present invention to provide a water storage structure used for the apparatus.

[0006]

According to a first aspect of the present invention, there is provided a rainwater storage device according to the first aspect of the present invention, wherein opposite side plates are integrally connected by a connecting portion to form a space between the two side plates. A large number of synthetic resin water storage structural materials serving as water storage space portions are accumulated underground, and the surroundings are buried by being surrounded by a water-permeable sheet.

In the rainwater storage device having such a configuration, rainwater infiltrating from the ground surface flows into the water storage space between the both side plates of the water storage structural material through the permeable sheet, and is temporarily stored. Then, the stored rainwater gradually penetrates deep underground through the permeable sheet and is drained. Therefore, when such a rainwater storage device is provided in various places in a residential development area, rainwater can be temporarily dispersed and stored in the rainwater storage devices in various places, and can be penetrated and drained deeper into the underground with a time lag. It helps to control the occurrence of type floods.

A rainwater storage device according to a second aspect of the present invention comprises a synthetic resin water storage structural material in which opposing side plates are integrally connected by a connecting portion and a space between the two side plates is used as a water storage space. It is characterized in that a large number of them are accumulated underground, and the surrounding area is buried surrounded by a seepage control sheet, and a rainwater introduction pipe is connected. According to a third aspect of the present invention, there is provided the rainwater storage device according to the second aspect of the present invention, wherein a pump for pumping rainwater stored in the water storage space of the water storage structural member is provided.

In the rainwater storage device of the second aspect, rainwater from, for example, an eaves gutter is stored in the water storage space of the structural material for water storage through the rainwater introduction pipe. The rainwater is stored by a water-blocking sheet around the water-storage structural material so as not to leak outside, and thus can be used, for example, as water for car washing or plant irrigation. In this case, it is convenient if a pump is installed as in the device of claim 3, since water can be easily pumped by the pump.

The water storage structure according to a fourth aspect of the present invention is characterized in that the opposite side plates are integrally connected by the connecting portion as described above, and a space between the both side plates is used as a water storage space portion. It is a structural material made of synthetic resin.

[0011] The structural material for water storage according to claim 5 is:
In the structural material according to the fourth aspect, a plurality of connecting portions are formed so as to be displaced so as not to overlap vertically, and the structural material for water storage according to the sixth aspect is the structural material according to the fourth or fifth aspect. In the above structure, a plurality of vertical rib portions are formed on both side plates, and the structural material for water storage according to claim 7 is the structural material according to claim 6, wherein a reinforcing core rod is inserted through the rib portion. The water storage structural member according to claim 8 is characterized in that, in the structural member according to claim 7, holes are formed at the upper and lower ends of the reinforcing core bar so as to fit coupling tools. Such a water storage structure material is the above-mentioned claim 4 to 8.
In any one of the structural materials described above, an engaging portion for connection is formed at a front end edge of both side plates, and a non-engaging portion for connection is formed at a rear end edge.

[0012] The water storage structure made of synthetic resin according to claim 4 is
It can be mass-produced by molding means such as injection molding, and can be stored in a water storage space between both side plates without decay or deterioration even when buried underground for a long time. In particular, when the connecting portions are shifted so as not to overlap with each other as in the case of the structural material for water storage according to the fifth aspect, the die can be easily removed at the time of injection molding, and the time required for molding can be reduced.

Further, in the water storage structure according to the sixth aspect, the pressure resistance in the vertical direction is improved by the rib portion. In particular, in the water storage structure according to the seventh aspect, the pressure resistance is further improved by the reinforcing core rod. There is no worry about being crushed.

Further, when the water storage structure material is stacked up and down, the hole at the upper end of the reinforcing core rod of the lower structural material and the hole at the lower end of the reinforcing core rod of the upper structural material are stacked. The reinforcing core rods can be connected to each other up and down by inserting a connecting tool into the upper and lower structural members, and the upper structural members can be stacked so as not to be displaced from side to side.

According to the ninth aspect of the present invention, the water storage structural member is connected simply and securely by engaging the front end edge of the next water storage structural member with the non-engagement portion of the rear end edge. be able to.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory view of a rainwater storage device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the device, and FIG. 3 is an embodiment of a water storage structural material of the present invention used in the device. FIG. 4 is a partial plan view showing a connection state (connection state in the front-rear direction) of the same structural material, FIG. 5 is a sectional view taken along line XX of FIG.
FIG. 6 is a cross-sectional view showing a state in which the structural materials are arranged side by side and stacked vertically, and FIG. 7 is a perspective view of a connecting member.

The rainwater storage device A shown in FIG. 1 is installed under the sidewalk 1 along a road in a residential area built on a hill or the like. It is installed at the place.

As shown in FIG. 2, the rainwater storage device A of this embodiment has a crusher orchid layer 12 and a sand layer 13 provided at the bottom of a sidewalk 1 between a roadway 2 and a residential land 3 for promoting water permeability. The plate-like body 14 is laid thereon. Then, a large number of synthetic resin-made water storage structural members 4 are accumulated on the plate-like body 14, and the surroundings are surrounded by a water-permeable sheet 5 and buried, and the crusher run layer 6 is placed on the structural member 4.
And a sand layer 7 are sequentially laminated, and a permeable pavement material 8 is laid thereon.

The water-permeable sheet 5 surrounding the water storage structure 4
Is for preventing the crusher orchid (crushed stone) of the crusher orchid 6 and the surrounding earth and sand from entering the inside of the structural material for water storage 4, and has a rigid mesh with a small mesh through which the crusher orland and sediment particles are difficult to pass. A plastic net or a nonwoven fabric of a plastic fiber which is durable and hard to break is preferably used.

The crusher orchid layers 6 and 12 are layers of crusher orchid having an average particle size of about 20 to 40 mm and having a thickness of about 10 to 30 cm. The upper crusher orchid layer 6 is made of a permeable pavement material on the surface of the sidewalk 1. The crusher orchid layer 12 on the lower side promotes the permeability of rainwater once stored in the structural material 4 for water storage, and promotes the permeability of rainwater permeating through the ground. Deep penetration,
It makes it easier to drain.

The sand layers 7 and 13 are layers of sand, sea sand, river sand and the like. Since the sand layers 7 and 14 cover the uneven surface of the crusher orchid layers 6 and 12 and lay the water-permeable pavement material 8 and the plate-like body 14 flat, the thickness thereof is about 3 to 10 cm. Is appropriate.

The sand layers 7 and 13 are formed by mixing a resin binder such as an acrylic resin, a phenol resin or an epoxy resin in a ratio of 5 to 15 parts by weight with respect to 100 parts by weight of the sand. Is also good. When the sand is condensed in this manner, the sand particles do not flow down together with the infiltrating rainwater, and there is a concern that the flowing of the sand particles may cause the pavement material 8, the plate-like body 14, and the water storage structure material 4 to tilt or rattle. Disappears.

The plate-like member 14 is laid to stably support the water storage structural member 4. For example, a synthetic resin foam plate such as polystyrene or polyethylene or a flat plate made of recycled plastic is used. A grid-like plate is also used.

As the water-permeable pavement material 8 to be laid on the sand layer 7, a water-permeable block material obtained by consolidating pebbles or other inorganic particles with cement or various binders is used. Interlocking blocks that are suitable for the pavement and that can be laid out in good shape in combination with each other are preferably used.

As shown in FIG. 3, the water storage structural member 4 made of synthetic resin used for the above-mentioned rain water storage device A is formed by integrally connecting opposite side plates 4a, 4a by a large number of connecting portions 4b. The space between the side plates 4a, 4a is defined as a water storage space 4c.
It is what it was. In particular, a foamed polypropylene water storage structure material having an expansion ratio of about 2 times formed by means such as foam injection molding is preferably used because it is lightweight, easily transported, and has high strength. Other, polyethylene,
A strong general-purpose thermoplastic resin such as polyvinyl chloride, a thermosetting resin reinforced with glass fiber or the like, a recycled plastic, or the like can also be used as a material resin of the water storage structural member 4.

It is desirable that the connecting portions 4b be formed so as to be slightly displaced in the front-rear direction so as not to be vertically overlapped. In this case, it is easy to remove the mold during the injection molding, and the time required for the molding is reduced. Is shortened, and mass production can be performed efficiently.

The size (dimensions) of the water storage structural material 4 is not particularly limited. In the case of the above-mentioned structural material made of expanded polypropylene, the side plate 4a has a vertical dimension of about 30 to 50 cm and a lateral dimension (front and rear dimensions). About 50-100cm, thickness 0.8
It is desirable to set the length of the connecting portion 4b (the distance between both side plates) to about 30 to 50 cm.

As shown in FIGS. 3 to 5, the water storage structural member 4 has a plurality of vertical ribs 4e formed on both side plates 4a, 4a. Has been raised. Further, a reinforcing core rod 4d is further inserted into each rib portion 4e, and the pressure resistance is further improved by the core rod 4d. Therefore, the structural material 4 has almost no fear of being crushed even when receiving the load of the crusher orchid layer 6, the sand layer 7, and the permeable pavement material 8.

As the reinforcing core rod 4d, a high-strength concrete core rod or a recycled plastic core rod or the like is used.
A core rod formed with is preferably used. Such a hole 40
If d is formed at both the upper and lower ends of the core rod 4d, as shown in FIG. 6, when the water storage structural members 4 are vertically stacked, the hole 40d at the upper end of the reinforcing core rod 4d of the lower structural member 4 is formed. By inserting the connector 9 into the hole 40d at the lower end of the reinforcing core rod 4d of the upper structural member 4, the reinforcing core rods 4d can be connected to each other up and down. The member 4 and the upper structural member 4 can be stacked vertically up and down so as not to be displaced from side to side.

As shown in FIG. 7, as the connecting member 9, convex shafts 9b, 9b are integrally provided above and below a flange 9a, and the convex shafts 9b, 9b are connected to the holes 40d of the reinforcing core rod 4d. Although a plastic or metal connecting tool fitted into the connector is preferably used, a connecting tool having only the convex shaft portion without the flange portion 9a can be used.

As shown in FIGS. 3 and 4, the front and rear edges of both side plates 4a, 4a of the structural member 4 for water storage are covered with engaging portions 4f for connection having hook-shaped cross sections. An engagement portion 4g is formed. Therefore, as shown in FIG. 4, the water storage structural members 4 and 4 are arranged back and forth, and the engaging portion 4g of the front end edge of the rear structural member 4 is attached to the engaged portion 4g of the rear end edge of the front structural member 4. When engaged, the water storage structural members 4, 4 can be easily and reliably connected back and forth.

Although the water storage structural member 4 of this embodiment is not provided with a connecting means for connecting left and right, for example, the left and right connecting engaging portion having the same hook-shaped cross-sectional shape as above is engaged with the engaged portion. The portions may be provided so as to protrude from the outer surfaces of both side plates 4a, 4a so that the water storage structural member 4 can be easily and reliably connected to the left and right.

When it is desired to further reduce the weight of the water storage structural member 4 or to impart water permeability to both side plates 4a, 4a, a large number of slits and holes (not shown) may be formed in both side plates 4a, 4a. Good.

In the rainwater storage device A having the above configuration,
Rainwater is permeable pavement material 8, sand layer 7, crusher orchid layer 6,
The water-permeable sheet 5 immediately permeates and flows down, and is temporarily stored in the water storage space 4c between the both side plates 4a, 4a of the water storage structural material 4 buried in a large number underground. Then, the stored rainwater is collected by the permeable sheet 5, the plate-like body 14, the sand layer 1 and the like.
3. It gradually penetrates deep underground through the crusher orchid layer 12.

Therefore, when such a rainwater storage device A is installed underground at various places in a residential development area, rainwater can be temporarily dispersed and stored by the rainwater storage devices at various places, and can be permeated and drained deeper into the basement at different times. Therefore, it will be sufficiently useful to control the occurrence of so-called urban floods.

Also, the rain falling on the road surface gathers on the road side,
The rainwater may flow into a reservoir (not shown) having a mud reservoir provided underground, and the supernatant rainwater may flow into the rainwater storage device A via a filter. Even in this case, the rainwater permeates deep underground in the same manner as described above.

FIG. 8 is a schematic sectional view of a rainwater storage device B according to another embodiment of the present invention.

This rainwater storage device B is formed by accumulating a large number of the synthetic resin water storage structural members 4 described above, and surrounding the surroundings with a water-impervious sheet 15 and burying it underground in a residential area or the like.
On the lower side of the water storage structural member 4, the above-mentioned plate-like body 14 for improving the installation stability of the structural member 4 is provided, on the lower side thereof, the above-mentioned sand layer 13, and further below the above-mentioned sand layer 13. A crusher run layer 12 is provided. The water-blocking sheet 15 blocks water from leaking rainwater stored in the water-storage space between both side plates of the water-storage structural member 4 so as to prevent the rainwater from leaking out. A thick and strong synthetic resin sheet or rubber sheet is used. Is done.

A rainwater introduction pipe 16 is connected to the water storage structural member 4 in which many of the rainwater storage devices B are integrated. The rainwater conduit 16 is provided, for example, from a filter device 18 in the middle of a hard gutter 17 for draining rainwater that has fallen on the roof of a house. The water is introduced into the water storage structural member 4 and the first dirty rainwater during rainfall flows down the hard gutter 17 and is drained.

A vertical pipe 19 is inserted into a large number of the water storage structural members 4, and a pump 20 for pumping rainwater stored in the water storage structural member 4 through the vertical pipes 19 is installed on the ground. . The pump 20 may be an electric pump, but a simple manual pump (hand pump) is more convenient.

In the rainwater storage device B having such a structure, the rainwater from the hard gutter 17 is introduced into the underground water storage structure 4 through the rainwater introduction pipe 16 and stored in the water storage space of the structure 4. Is done. The rainwater thus stored does not leak out to the outside by the water-blocking sheet 15 around the water-storage structural material. Therefore, if the pump 20 is operated and pumped up when necessary, it is used for car washing or plant irrigation. Available as water.

The rainwater storage device B can also store rainwater that has fallen on the roof of a house until the space for water storage of the structural material 4 for water storage is full, thereby suppressing the occurrence of so-called urban flooding. It is effective for

The present invention has been described with reference to the specific embodiments. However, in the present invention, the apparatus having a function as a rainwater infiltration apparatus as shown in FIGS. Since it is temporarily stored, we decided to represent it as a rainwater storage device.

[0045]

The rainwater storage device according to claim 1 of the present invention stores rainwater infiltrating from the surface of the ground once in the water storage space between both side plates of the water storage structural material, and gradually penetrates deep underground. Since such a rainwater storage device can be provided at various locations, it is possible to temporarily store rainwater in the rainwater storage devices at various locations in the event of heavy rain, thereby suppressing the occurrence of so-called urban floods. Can be helpful.

Further, the rainwater storage device according to the second aspect of the present invention can store rainwater falling on the roof of a house or the like through a rainwater introduction pipe until the water storage space of the water storage structural material becomes full. In addition to helping to suppress the occurrence of so-called urban floods during heavy rains, the rainwater collected by the impermeable sheet does not leak out, so this rainwater can be used, for example, for car washing or plant irrigation. Can be used effectively.

The water storage structural material of the present invention used in these rainwater storage devices is a lightweight and portable synthetic resin structural material, so that it has good workability, and uses recycled plastic to save resources. It is also possible to construct a rainwater storage device having excellent durability since it has high strength and does not rot for a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a rainwater storage device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the rainwater storage device.

FIG. 3 is a perspective view showing one embodiment of a water storage structural material of the present invention.

FIG. 4 is a partial plan view showing a connection state of the structural members.

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

FIG. 6 is a cross-sectional view showing a state in which the structural materials are arranged side by side and stacked vertically.

FIG. 7 is a perspective view of a connector used when stacking the structural materials.

FIG. 8 is a schematic sectional view of a rainwater storage device according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 water storage structural material 4a side plate 4b connecting part 4c water storing space 4d reinforcing core rod 40d hole 4e rib part 4f engaging part 4g engaged part 5 water permeable sheet 6,12 crusher runn layer 7,13 sand layer 8 water permeability Pavement material 14 Plate 15 Water-blocking sheet 16 Rainwater introduction pipe 20 Pump

Claims (9)

[Claims] A large number of synthetic resin water storage structural materials are integrated underground with a space between the two side plates being integrally connected by a connecting portion and a space between the two side plates being used as a water storage space. A rainwater storage device, wherein the rainwater storage device is buried around a conductive sheet. A large number of synthetic resin water storage structural materials are integrated underground with the space between the two side plates being integrally connected by a connecting portion and the space between the two side plates being used as a water storage space. A rainwater storage device, wherein the rainwater storage device is buried surrounded by a water sheet and connected to a rainwater introduction pipe. 3. The rainwater storage device according to claim 2, further comprising a pump for pumping rainwater stored in the water storage space of the water storage structural material. 4. A synthetic resin water storage structural material, wherein opposing side plates are integrally connected by a connecting portion, and a space between the both plates is used as a water storage space. 5. The structural material for water storage according to claim 4, wherein a plurality of connecting portions are formed so as to be displaced so as not to overlap one another up and down. 6. The structural material for water storage according to claim 4, wherein a plurality of vertical rib portions are formed on both side plates. 7. The structure according to claim 6, wherein a reinforcing core rod is inserted through the rib portion. 8. The water storage structural member according to claim 7, wherein holes are formed at upper and lower ends of the reinforcing core bar so as to be fitted with connecting members. 9. The connecting plate according to claim 4, wherein a connecting engagement portion is formed at a front end edge of each of the side plates, and a connection non-engaging portion is formed at a rear end edge. The structural material for water storage according to Crab.