JP6371625B2 - Rainwater storage and penetration facility - Google Patents

Description

  The present invention is usually disposed at the end of a drainage facility of a building and stores rainwater, and infiltrates the rainwater into the ground or guides the rainwater to an outdoor drainage ditch. It is about.

When rainwater is recharged into the ground, effects such as prevention of land subsidence, mitigation of temperature rise in urban areas due to evaporation of water penetrating into the ground, and prevention of global warming can be obtained. Therefore, conventionally, a technique has been developed that allows rainwater drained into an outdoor drainage channel to penetrate into the ground.
For example, in Patent Document 1 and Patent Document 2, a crushed stone is laid around an underground structure such as a trench that collects rainwater or a collecting basin, and a hole provided over substantially the entire underground structure. A structure for draining and infiltrating rainwater into crushed stones laid around is provided.
Patent Document 3 provides a rainwater infiltration device in which one or a plurality of water-permeable concrete horizontal pipes are provided on a side surface of a casing made of water-permeable concrete.
Patent Document 4 provides a water storage tank in which a through hole is provided in the side surface of the processing tank together with an inlet, and a drain pipe is connected to the through hole in an inclined state so as to rise as the distance from the processing tank increases. Yes.

JP 2011-80332 A Japanese Utility Model Publication No. 11-28456 Japanese Utility Model Publication 1-1141886 Utility Model Publication No. 3159729

By the way, in recent years, urban flooding due to local heavy rain such as guerrilla heavy rain is also regarded as a problem, and facilities having a performance capable of handling such heavy rain are required. . In response to such a demand, the structures of Patent Document 1 and Patent Document 2 require a space larger than a certain extent in order to store rainwater and make it sufficiently large to penetrate into the ground. Further, in this structure, when foreign matter such as earth and sand or dust flows out from the structure in the soil into the crushed stone through the hole, it is difficult to remove the foreign matter in the crushed stone, and the function is deteriorated.
Since the rainwater stored in the main body of the above-mentioned patent document 3 penetrates into the surrounding ground from the horizontal pulling tube, in addition to the rainwater stored in the main body, the rainwater stored in the main body enters the rainwater ground. The amount of permeation can be greatly increased compared to the case alone. However, in the rainwater infiltration device, the function of infiltrating rainwater into the ground is due to the water-permeable concrete, and when the water-permeable concrete is clogged by foreign matter such as earth and sand contained in the rainwater, The function will be degraded.
According to the water storage tank of Patent Document 4, the intrusion of foreign matter into the drain pipe can be prevented by tilting the drain pipe so as to rise as the drain pipe moves away from the treatment tank. However, in this water storage tank, rainwater can be drained only at the tip of the drainage pipe, and in order to have a performance that can cope with heavy rain, there is no other way than increasing the drainage pipe. Since rainwater is drained intensively at the tip of the tube, soil collapse becomes a problem.
The present invention adds the function of a rainwater infiltration device as an infiltration of the above-mentioned rainwater into the ground, and further improves the rainwater permeability to a greater extent than the above-mentioned conventional device, thereby improving the function of the rainwater infiltration facility. It is an issue to maintain.

As a means for solving the above-mentioned problems, the present invention further includes a rainwater inlet and a rainwater outlet on the side of the main body, and a rainwater basin having an inspection port on the upper end. A horizontal pipe with a plurality of holes is connected so as to be arranged in the upper half of the pipe wall, and a permeation part is formed around the horizontal pipe, It provides a rainwater storage and penetration facility characterized in that the rainwater storage and penetration facility is provided obliquely upward.
The bottom of the pipe connected to the storm water inlet provided in the main body is the bottom of the pipe connected to the storm water outlet provided in the main body and the horizontal pipe pipe connected to the main body. It is desirable that the hole is set higher than the bottom, and a plurality of holes provided so as to be disposed in the upper half portion of the tube wall of the horizontal pulling tube are arranged in the tube axis direction of the horizontal pulling tube. It is desirable that it is disposed substantially throughout.
Furthermore, it is desirable to attach an outflow amount suppressing member for suppressing the outflow amount of rainwater to the rainwater outlet provided in the main body.
In the present invention, preferably the rainwater trough is the final trough attached to the end of the building drainage system.
In addition, it is desirable that a filter is attached to the connecting portion with respect to the main body in the horizontal pipe.

As for the rainwater masu 7, rainwater collected by rain gutters, etc. is usually temporarily stored in the main body 2 via the rainwater inlet 3 and flows out from the rainwater outlet to the ground or drainage. Let For example, rainwater that cannot be stored in the main body 2 due to heavy rain or the like is stored in the horizontal pulling tube 8 while moving up the horizontal pulling tube 8. Further, when the amount of rainwater flowing into the horizontal pipe 8 increases and the horizontal pipe 8 is filled with rainwater, the horizontal pipe 8 has a plurality of parts arranged so as to be arranged in the upper half of the pipe wall. Since the plurality of holes 9 are provided, the rainwater overflows from the plurality of holes 9 and permeates into the surrounding infiltration portion 19. Therefore, according to the rainwater storage and penetration facility of the present invention, as the amount of rainwater treated, the amount stored in the main body 2 and the amount stored in the horizontal pipe 8 are further increased. Since the amount of overflow from the hole 9 is added, the treatment performance of rainwater is greatly improved.
Furthermore, since the plurality of holes 9 are provided so as to be arranged in the upper half of the horizontal pipe 8, the rainwater in the horizontal pipe 8 removes foreign substances contained in the rainwater. While being deposited on the bottom of the horizontal pipe 8, it is discharged from the plurality of holes 9 into the infiltration portion 19 without being interfered with the foreign matter. As a result, the rainwater storage and infiltration facility of the present invention can suppress the intrusion of foreign matters into the infiltration portion 19 in particular, so that it is possible to suppress functional deterioration due to dirt due to the foreign matters.
In addition, the horizontal pipe 8 is obliquely extended upward from the main body 2, and the rainwater that has flowed into the horizontal pipe 8 is generated when there is a margin in the amount of rainwater stored in the main body 2. Since it flows down in the horizontal pipe 8 and returns to the main body 2, foreign matters such as earth and sand that cause clogging of the horizontal pipe 8 and the plurality of holes 9 are more likely to flow out into the main body 2. Therefore, it is possible to suppress a decrease in the function of the horizontal pulling tube 8 due to foreign matter. Furthermore, when removing foreign matter such as earth and sand during maintenance to maintain the function of the rainwater storage and infiltration facility, the foreign matter will flow out into the main body 2, so it is only necessary to remove the foreign matter from the main body 2 alone. Therefore, maintenance can be easily performed.
The lowest level L _{2 of the} pipe connected to the rainwater inlet 3 provided in the main body 2 is connected to the lowest level of the pipe connected to the rainwater outlet 4 provided in the main body 2 and the second main body 2. If it is set higher than the lowest level L ₁ of the horizontal pipe 8 (L ₂ > L ₁ ), the rainwater and drainage in the main body 2 will flow to the rainwater inlet 3 side (rainwater inflow pipe 10 side). Backflow is prevented.
In addition, if a plurality of holes 9 provided in the horizontal pipe 8 are disposed over substantially the entire tube axis direction of the horizontal pipe 8, rainwater in the horizontal pipe 8 can be removed from the horizontal pipe 8 in the horizontal direction. The pulling tube 8 can permeate the entire permeation portion 19 evenly.
In addition, it is desirable to secure an amount of rainwater stored in the main body 2 by attaching an outflow amount suppressing member 13 to the rainwater outlet 4 of the main body 2.
In addition, the rainwater tank 7 can also serve as a final drainage that collects rainwater from the drainage facility of the building and guides it to the drainage groove 12.
Further, in the horizontal pipe 8, a filter 20 is attached to the connecting portion to the main body 2, thereby preventing large foreign matters such as fallen leaves from entering the horizontal pipe 8. desirable.
Accordingly, in the present invention, rainwater stored in the main body 2 can be efficiently infiltrated into the surrounding ground, and the function deterioration of the rainwater storage and infiltration facility can be suppressed.

The top view of the rainwater storage penetration facility in an Example. The main body side surface notch side view seen from the inflow side in an Example. The main body front notch front view in the Example. The perspective view of the outflow amount suppression member in an Example. The main body side surface notch side view seen from the inflow side in another Example.

The present invention will be described below with reference to one embodiment shown in FIGS.
In the rainwater storage and infiltration facility 1 shown in FIG. 1, reference numeral 2 denotes a main body, and a side of the main body 2 is provided with a rainwater inlet 3 and a rainwater outlet 4 at opposite positions. The part is provided with an inspection port 5 with a lid 6, and a rainwater tank 7 is formed.
A pair of left and right horizontal pipes 8 and 8 are connected to the side surface of the rainwater trough 7 at a position orthogonal to the rainwater inlet 3 and the rainwater outlet 4.
A plurality of small-diameter holes 9 are provided in the horizontal pulling tubes 8, 8, respectively. Further, the horizontal pulling tubes 8, 8 are respectively extended obliquely upward from the main body 2. The plurality of holes 9 provided in the horizontal pulling tube 8 are arranged in the upper half of the tube wall when the horizontal pulling tube 8 is viewed in cross section. The pulling tube 8 is disposed over substantially the entire tube axis direction.

As shown in FIG. 2, the rainwater storage and penetration facility 1 of the present invention is constructed such that rainwater collected from a rain gutter or the like that is buried in the ground with the upper end of the main body 2 aligned with the ground surface GL, A rainwater inflow pipe 10 for flowing into the rainwater mass 7 from the drainage path end is connected to the rainwater inlet 3 of the main body 2, and the rainwater stored in the main body 2 is further drained to the outdoor drainage groove 12 ( A rainwater outflow pipe 11 for guiding to the side groove) is connected to the rainwater outlet 4 of the main body 2.
In the rainwater storage and penetration facility 1, the lowest level L ₂ of the rainwater inflow pipe 10 connected to the rainwater inlet 3 is higher than the lowest level L ₁ of the horizontal pulling pipe 8 (L ₂ > L ₁ ). Since the lowest level L ₁ of the horizontal pipe 8 is set higher than the lowest level of the rainwater outflow pipe 11 connected to the rainwater outlet 4 of the main body 2, the lowest level L of the rainwater inflow pipe 10 is set. ₂ is set higher than the lowest position of the rainwater outflow pipe 11.
Further, an outflow amount suppressing member 13 for suppressing the outflow amount of rainwater stored in the main body 2 is attached to the rainwater outlet 4. As shown in FIG. 4, the outflow amount suppressing member 13 includes a mounting tube 14 for mounting on the rainwater outlet 4 and a deformed funnel-shaped tip portion 16 that is fed out from a tip flange 15 of the mounting tube 14. An orifice 17 is formed at the tip of the tip portion 16.
A handle 18 is erected from the tip flange 15 portion of the outflow rate suppressing member 13 so that it is easy to perform operations such as taking out from the inspection port 5 with the lid 6 removed during maintenance. Yes.

As described above, the rainwater storage and infiltration facility 1 is embedded in the ground G, but the infiltration portions 19 and 19 made of a crushed stone filling layer are formed in the ground around the horizontal pipes 8 and 8.
In the above configuration, rainwater collected from a rain gutter or the like that is a drainage facility of the building is temporarily stored in the main body 2 of the rainwater 7 that is the final mash from the rainwater inflow pipe 10.
The rainwater temporarily stored in the main body 2 is usually controlled from the rainwater outflow pipe 4 through the rainwater outflow pipe 11 while the outflow amount is suppressed by the outflow amount suppressing member 13 attached to the rainwater outflow outlet 4. It is discharged to the drain groove 12 via
On the other hand, when the amount of rainwater flowing into the main body 2 from the rainwater inflow pipe 10 increases dramatically due to heavy rain or the like and exceeds the amount of outflow to the rainwater outflow pipe 11, Since the lowest level L ₁ is lower than the lowest level L ₂ of the rainwater inflow pipe 10, rainwater overflows into the horizontal pipes 8, 8, and the rainwater storage function by the horizontal pipe 8 is maximized. And backflow to the rainwater inlet 3 side (rainwater inflow pipe 10 side) is prevented.
When the rainwater overflowing into the horizontal pipes 8 and 8 tends to increase the amount of rainwater flowing into the horizontal pipes 8 and 8 exceeding a predetermined amount, the horizontal pipes 8 and 8 are used. From the inside, it overflows into the permeation part 19 through the plurality of holes 9 and permeates into the permeation part 19 as it is. When the amount of rainwater entering the horizontal pipe 8 does not exceed a predetermined amount, the rainwater is temporarily stored in the horizontal pipes 8 and 8 and stored in the main body 2 described above. When the amount of rainwater stored in the inside becomes a predetermined amount or less, it returns to the main body 2.
Since the plurality of holes 9 of the horizontal pipe 8 are provided in the upper half portion of the horizontal pipe 8, foreign matters such as earth and sand and dust contained in rainwater are removed from the bottom of the horizontal pipe 8. To deposit. Since the horizontal pulling tube 8 is inclined upward, foreign matter accumulated on the bottom of the horizontal pulling tube 8 together with the water returning into the main body 2 is easily discharged into the main body 2. Become.

FIG. 5 shows another embodiment different from the above embodiment. In the embodiment shown in FIG. 5, the filter 20 is attached to the connecting portion to the main body 2 in the horizontal pulling tube 8. In the configuration according to this embodiment, foreign matters such as fallen leaves are prevented from entering the horizontal pulling tubes 8 and 8.
Furthermore, the present invention is not limited to the above-described embodiments, and the hole of the horizontal pulling tube may be disposed in the entire tube, and the outflow amount suppressing member is not essential to the present invention.
In addition, the rainwater mass of the present invention may be an intermediate frame disposed in the middle of the drainage equipment other than the final one attached to the end of the drainage equipment in the building.
In addition, the main body 2 is formed by penetrating a plurality of water-permeable holes made of small holes in the peripheral wall or the bottom wall, for example, so that rainwater stored in the main body 2 can be passed through the water-permeable holes. You may comprise so that it may osmose | permeate in the ground around. When the water permeable hole is provided in the main body 2, the outer surface of the main body 2 is made of a non-woven fabric or the like so that foreign matter such as earth and sand does not enter the main body 2 through the water permeable hole. It is desirable to coat. Furthermore, the laterally permeable pipes 8 and 8 may be covered with the water permeable sheet so that foreign matters such as earth and sand do not enter through the holes 9 of the laterally drawn pipes 8 and 8.
The connection of the rainwater inflow pipe 10 and the rainwater outflow pipe 11 to the main body 2 is, for example, connected to the main body 2 so that the rainwater inflow pipe 10 and the rainwater outflow pipe 11 are orthogonal to each other. In addition, it may be other than those disclosed in the present invention.
Further, the number of connections of the horizontal pulling pipe 8, the rainwater inflow pipe 10 and the rainwater outflow pipe 11 to the main body 2 is not particularly limited.

  Since the present invention can infiltrate the rainwater collected by rain gutters, etc., which are drainage facilities of buildings, into the surrounding ground, it can give diversity to further uses and is therefore industrially applicable. .

DESCRIPTION OF SYMBOLS 1 Rainwater storage penetration facility 2 Mass main body 3 Rainwater inflow port 4 Rainwater outflow port 5 Inspection port 7 Rainwater trough 8 Horizontal pipe 9 Hole 12 Drainage gutter (side ditch)
13 Outflow control member 19 Infiltration part

Claims (5)

In the rainwater tank, which has a rainwater inlet and a rainwater outlet on the side of the main body, and an inspection port at the upper end, a lateral pipe with a plurality of holes is further provided on the side of the rainwater. Connected, a permeation portion is formed around the horizontal pulling tube, and the horizontal pulling tube is increasingly fed obliquely upward from the main body ,
The lowest level of the pipe connected to the storm water inlet provided in the main body is the lowest level of the pipe connected to the storm water outlet provided in the main body and the minimum of the horizontal pipe connected to the main body. Rainwater storage and penetration facility characterized by being set higher than the rank .   The plurality of holes provided in the horizontal pulling tube are disposed in an upper half portion of the tube and are disposed over substantially the entire tube axis direction of the horizontal pulling tube. Rainwater storage and penetration facility. The rainwater storage and penetration facility according to claim 1 or 2 , wherein an outflow amount suppressing member for suppressing an outflow amount of rainwater is attached to a rainwater outflow port provided in the main body. The rainwater storage and infiltration facility according to any one of claims 1 to 3 , wherein a filter is attached to the connecting portion to the main body in the horizontal pipe. The rainwater storage and penetration facility according to any one of claims 1 to 4 , wherein the rainwater tank is a final tank attached to a terminal of a drainage facility of a building.

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