JP4163088B2 - Rainwater storage facility - Google Patents

Description

  The present invention relates to a rainwater storage facility for storing rainwater to be used for fire prevention, watering, etc. in a building or a housing complex, particularly a housing complex.

Conventionally, for example, in large buildings and housing estates, water tanks have been installed in the open spaces around buildings and housing estates, or in the basement of bicycle parking areas, etc. in order to use rainwater as fire prevention water or for watering flower beds, vegetable gardens, etc. Various attempts have been made to store rainwater.
In particular, in recent years, in the case of constructing a new housing complex in preparation for water shortages in summer, this type of rainwater storage facility is often provided.

As a typical example of this kind, there is a water storage facility described in Patent Document 1.
As shown in FIG. 4, the ground 1 is dug down in advance to form a water reservoir 2 having a rectangular planar shape, for example, and then the inner surface (including side and bottom surfaces) of the water reservoir 2 is filled with gravel or the like. The tension layer 3 is formed. Recently, in order to prevent mud and the like from entering the water storage part 2 from the gap of the lining layer 3 as much as possible, the side and bottom surfaces are covered with a water-impervious sheet or semi-permeable sheet instead of gravel. In many cases, the tension layer 3 is formed.

  When the lining layer 3 is formed, a box-shaped resin skeleton block 4 is assembled vertically and horizontally in the water storage section 2 to form a space holding skeleton having a water storage space therein. When the space holding skeleton is completed, finally, for example, a resin top plate is spread on the space holding skeleton, and a water-impervious sheet or semi-permeable sheet is covered on the top plate, or further, The covering layer 9 is formed by further backfilling soil on the adhesive sheet.

  In FIG. 4, reference numeral 10 denotes an inflow port for guiding rainwater to the water storage unit 2, and reference numeral 11 denotes an outflow port connected from the water storage unit 2 to a water pipe connected to a river or the like.

  By the way, as the resin skeleton block 4, those having various shapes have been conceived so far, and there are a cylindrical type, a tray type and the like in addition to the box type described above. However, in any shape, a water storage space as large as possible can be formed inside, and there is sufficient pressure resistance against the pressure from the top of the coating layer 9, and the resin skeleton blocks 4 can be easily assembled together. At least three points are considered and designed.

Japanese Patent Publication No. 4-26648 (Japanese Patent Laid-Open No. 63-268823)

In the rainwater storage facility described in Patent Document 1 described above, there is no problem if the rainwater flowing into the water storage section 2 is only collected on the roof of a building such as an apartment house. If the rainwater flows in through a drainage ditch provided on the ground, such as a side ditch of a building, a large amount of stones, gravel, or a lump of soil is mixed in the rainwater. It flows in.
When stones, gravel, etc. flow into the water storage part 2 in this way, they diffuse and accumulate at the bottom of the water storage part 2, and the volume of water that can be stored in the water storage part 2 gradually decreases. is there.

  As shown in FIG. 4, the space portion of the space holding skeleton formed by the resin skeleton block 4 is too narrow for an operator to enter the space and remove the gravel and the like. Even if an operator enters the gap, the danger is too great to work in the gap, which is a substantially sealed space.

Therefore, when there is a high possibility that stones, gravel, etc. are mixed in rainwater, a sedimentation tank (not shown) is provided in the middle of the flow path 12 leading to the inflow port 10 shown in FIG. A large thing was allowed to settle, and the overflowed sedimentation tank was led to the inlet 10 of the water storage section 2.
However, in the case of this method, if a large sedimentation tank is provided, stones, gravel, or finer objects can be settled and removed in this sedimentation tank. There is a problem that is difficult. In addition, in order to provide a large sedimentation tank, it is necessary to dig a large hole in the ground, and it is also necessary to form walls around the bottom and concrete, which makes the installation cost extremely expensive There was also.

  Therefore, in practice, it was rare that a sufficiently large settling tank could be provided. If a sedimentation tank having a sufficiently large volume cannot be provided, fine sediment accumulates at the bottom of the water storage unit 2 over time, and since this sediment cannot be completely removed, the water storage in the water storage unit 2 is gradually increased. The problem remained that the volume was reduced and the desired amount of water could not be maintained.

Therefore, as shown in FIG. 5, a method has been proposed in which a sedimentation tank 15 is provided adjacent to the water reservoir 2 in front of the inlet 10 of the water reservoir 2.
In FIG. 5, the same parts as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted. 5, the code | symbol 15 has shown the sedimentation tank, and the code | symbol 16 has shown the pump apparatus in the case of utilizing the water storage in the water storage part 2 as watering or fire prevention water.

By the way, in the case of this method, since the sedimentation tank 15 is installed adjacent to the water storage part 2, as described above, the precipitation tank is independently provided in the middle of the flow path 12 reaching the inlet 10 of the water storage part 2. Compared to the case, there is an advantage that the construction work can be reduced.
However, the point that the side wall and bottom wall 13 of the settling tank 15 must be formed of concrete is the same as described above, and the problem that the construction cost is still high still remains. In addition, there is a problem of what to do with the joint between the water-impervious sheet or semi-permeable sheet forming the lining layer 3 of the water reservoir 2 and the concrete wall 13 of the settling tank 15. If the joint is not tight, the earth and sand on the outside of the lining layer 3 and the wall 13 will enter the water storage part 2 through the gap between them, which will also cause the sediment to increase.

The purpose of the present invention in view of the foregoing problems, when providing the settling tank, especially newly its location is not necessary to provide a yet placed themselves can easily and significantly reduce the construction costs, and further state of the internal settler It is to provide a rainwater storage facility that can be observed .

In order to achieve the above object, the rainwater storage facility according to claim 1 includes a water storage portion having an inner surface provided with a lining layer made of a water-impervious sheet or a semi-permeable sheet, and an open water storage portion. A space holding skeleton that is arranged in the water storage section provided by assembling a plurality of resin skeleton blocks, a covering layer that covers the upper portion of the water storage section, and a rainwater inlet in the water storage section. In the rainwater storage facility, the resin skeleton block disposed in the vicinity of the inlet and the resin skeleton block disposed in the vicinity of the inlet are disposed so as to surround the inlet. A sedimentation tank is formed by the partition wall and a part of the lining layer, and a resin framework block partly cut is disposed inside the sedimentation tank formed by providing the partition wall. , Up and down from the bottom of the water reservoir It communicates with, and is characterized in that a plurality of access holes in which the portion adjacent to the horizontal direction is formed by a resin skeleton block Kirikakare for precipitate recovery is provided.

According to the rainwater storage facility according to claim 1 thus configured, the resin skeleton block disposed inside the water storage section and in the vicinity of the inlet of the water storage section, and the inlet A settling tank is provided in the lining layer from a partition wall provided so as to surround the resin skeleton block disposed in the vicinity on the inflow side and a part of the lining layer. Therefore, it is not necessary to think from the beginning of an annoying problem such as where to newly install the settling tank. In addition, construction costs can be reduced because a settling tank is installed using a part of the water storage section. Furthermore, since even fine earth and sand can be precipitated in the settling tank, it is possible to prevent the sediment from spreading to the entire interior of the water storage unit excluding the settling tank, and to greatly reduce the amount of settling. Therefore, this facility can be used without cleaning the water storage section for a long time.
In addition, a resin skeleton block with a part cut away is arranged so that a work hole is formed inside the partition wall of the settling tank, and the work hole from the bottom surface to the ground surface communicates in the vertical direction in the settling tank. Therefore, the sediment in the sedimentation tank can be discharged to the outside through the work hole using a pump, for example, and the operator can observe the inside of the sedimentation tank through the work hole. In some cases, it is possible to discharge the sediment in the sedimentation tank by itself.

The rainwater storage tank according to claim 2 of the present application is the rainwater storage facility according to claim 1, wherein the partition wall forming a sedimentation tank disposed so as to surround the inflow port on the inflow side has an inflow port. It is characterized by being arranged in three directions so as to be enclosed. According to the rainwater storage facility according to claim 2, the working hole can be formed by the sedimentation tank surrounded by the partition walls in three directions and the skeleton block disposed in the sedimentation tank.
A rainwater reservoir according to claim 3 of the present application is the rainwater storage facility according to claim 1 or 2, wherein the resin skeleton block disposed inside the partition wall is cut at one corner. It is characterized by that. According to the rainwater storage facility according to claim 3, the working hole can be formed in the resin block from which one corner is cut.
Moreover, the rainwater reservoir according to claim 4 of the present application is the rainwater storage facility according to any one of claims 1 to 3, wherein a set of four resin skeleton blocks arranged inside the partition wall. It is characterized by constituting a work hole. According to the rainwater storage facility according to claim 4, the work hole can be formed by a set of four resin skeleton blocks.

Further, the rainwater reservoir according to claim 5 of the present application is the rainwater storage facility according to claim 4, wherein the corner of the resin block disposed inside the partition wall is cut into a quarter circle. It is characterized by being cut. According to the rainwater storage facility according to claim 5, the circular work hole can be formed by a set of four resin skeleton blocks.
The rainwater reservoir according to claim 6 of the present application is the rainwater storage facility according to any one of claims 1 to 5, wherein the partition wall includes a plurality of rainwater storage tanks for adjusting a water level inside and outside the partition wall. The water outlet is provided through the partition wall. In this way, a plurality of water outlets for adjusting the water level inside and outside the partition wall are provided in the resin partition wall partitioning the settling tank so as to penetrate the wall. The water level in the settling tank and the water storage part outside the settling tank can be maintained at substantially the same level. Therefore, for example, the water level on the sedimentation tank side is higher than the water level in the water storage section, and it is preferable that there is less concern that the partition wall made of resin will be damaged due to a large water pressure.

According to rainwater reservoir facility of the present invention as described above, when providing the settling tank, especially what to do with its location, even without addition installation itself can be significantly reduced easy installation costs problem, more It is possible to provide a rainwater storage facility that can observe the inside of the sedimentation tank .

  Hereinafter, an embodiment of a rainwater storage facility according to the present invention will be described in detail with reference to FIGS. In FIG. 1, the same parts as those in FIG. 4 are denoted by the same reference numerals, the description thereof will be simplified, and only the points showing the features of the present invention will be described in detail.

FIG. 1 shows an embodiment of a rainwater storage facility according to the present invention, and is a schematic view of the storage facility as seen from the side. 2 is a partial plan view of the settling tank provided in the water storage section showing the characteristics of the rainwater storage facility of the present invention, and FIG. 3 is used to form a space holding skeleton constructed in the water storage section. It is a perspective view which shows an example of the resin-made frame | skeleton block which is doing.

  As shown in FIG. 1, an underground surface of the water storage unit 2 is formed by digging the basement of the ground 1 to form, for example, a rectangular or square water storage unit 2. The lining layer 3 is formed by lining the water-impervious sheet, the semi-permeable sheet, or a combination thereof in multiple layers.

When the lining layer 3 is formed, the resin skeleton block 4 as shown in FIG. 3 is assembled vertically and horizontally in the water reservoir 2 to form a space holding skeleton having a water storage space as shown in FIG. To do. As shown in FIG. 1, when the resin skeleton blocks 4 shown in FIG. 3 are stacked, the resin skeleton blocks 4 are assembled upside down for each stage.
For example, as shown in FIG. 3, a protrusion 14 and a fitting hole 24 are provided at the tip of the cylindrical portion of the resin skeleton block 4, and another resin skeleton block 4 is placed on the resin skeleton block 4. In the case of stacking, the protrusion 14 and the fitting hole 24 provided on the cylindrical portion of another resin skeleton block 4 inverted, and the protrusion 14 of one resin skeleton block 4 are connected to the other resin skeleton block 4. And the projection 14 of the resin skeleton block 4 may be fitted to the other fitting hole 24 of one resin skeleton block 4.

On the other hand, since a large number of transmission holes are provided in the flat plate portion of the resin skeleton block 4, when the two resin skeleton blocks 4 are connected to each other by the flat plate portions, a gripping tool suitable for the transmission hole is used. The connection may be made using, for example.
Various shapes of the resin skeleton block 4 have been proposed as described above, and in the present invention, not only the resin skeleton block 4 shown in FIG. 3 but also various resin skeleton blocks 4 are used. Needless to say, it can be done.

  By the way, the resin skeleton block 4 is sequentially assembled to form a space holding skeleton in the water storage unit 2, and when approaching the vicinity of the inlet 10 to the water storage unit 2 as shown in FIG. As for the skeleton block 4, a resin skeleton block 4 having a shape different from the other of which one corner is cut out in a quarter circle is assembled so that a work hole 50 for collecting sediment is formed in the center. And as shown in FIG. 2, the partition wall 30 made from resin is arrange | positioned to 3 directions, a part of the water storage part 2 is enclosed, and the sedimentation tank 40 is formed in the inflow port 10 side. The lower end of the partition wall 30 is in contact with the bottom surface of the water storage unit 2.

The resin partition wall 30 has a plurality of water outlets (not shown) having a radius of about 10 mm that penetrate the partition wall 30 and connect the settling tank 40 and the water storage section 2 side near the center in the height direction. The water level on the sedimentation tank 40 side and the water level on the water storage unit 2 side are always at the same height.
Since the water flow outlet is provided in the partition wall 30 in this manner, the water levels on the settling tank 40 side and the water storage section 2 side are always adjusted to be substantially the same. There is no risk of a load due to a difference in water pressure caused by an extremely different water level on the part 2 side.
Therefore, even if the partition wall 30 is formed of resin, it can sufficiently withstand long-term use.

In FIG. 1, reference numeral 16 denotes a pump device provided as necessary. If this is provided, it is preferable that water can be sprayed onto a flower bed or the like when water is insufficient. Of course, if the rainwater storage facility is simply used for storing water, it may not be necessary to provide the pump device 16.
Reference numeral 60 denotes a small sedimentation tank provided in the middle of the flow path 12 connected to the inlet 10 of the water storage section 2. In this sedimentation tank 60, relatively large items such as stones and gravel are settled and removed. Therefore, if the flow path 12 simply collects and carries rainwater from the roof of the apartment house, there is little possibility that stones and gravel will be mixed in it. There is no need to provide it.

Reference numeral 61 denotes a manhole cover. When the cover 61 is opened at appropriate times, it is possible to observe the inside of the water storage unit 2, the settling tank 40 and the settling tank 60.
Reference numeral 9 denotes a covering layer, and the covering layer 9 is made of a resin laid on, for example, the water storage portion 2, more specifically on a space holding skeleton composed of the resin skeleton block 4, as in the past. The top plate, the water-impervious sheet or semi-permeable sheet 3 covering the top plate, and the soil buried back on the water-impervious sheet or semi-permeable sheet 3 are formed.

  According to the rainwater storage facility of the present invention constructed as described above, the sedimentation tank 40 is formed by utilizing the vicinity of the inlet 10 inside the water storage unit 2, so that the installation location of the sedimentation tank is newly established. There is no need to secure. Further, since the sedimentation tank 40 is formed by using a part of the water storage unit 2 and simply partitioning the three sides with the partition wall 30, the construction cost is extremely low. In addition, since the resin partition wall 30 can be employed as the partition wall 30, the construction cost can be further reduced.

Further, according to the rainwater storage facility of the present invention, the sedimentation tank 40 is provided in the water storage part 2 whose inner surface is covered with the lining layer 3 formed of a water-impervious sheet or a semi-permeable sheet. The joint between the water-impervious sheet or semi-permeable sheet forming the lining layer 3 of the water storage section 2 and the concrete wall 13 of the settling tank 15, which is a problem of the conventional water storage facility shown in FIG. The problem of what to do no longer exists. Therefore, there is no fear that the earth and sand outside the lining layer 3 and the wall 13 will enter the water reservoir 2 through the gap between the two.
Furthermore, since a working hole extending from the bottom surface to the ground surface is provided in the sedimentation tank 40 so as to communicate in the vertical direction, the sediment in the sedimentation tank 40 can be sent through the work hole at an appropriate time using, for example, a pump. It can be discharged to the outside, or the operator can observe the inside of the settling tank 40 from this working hole, or in some cases, can discharge the sediment in the settling tank 40 by itself.

It is the schematic diagram which looked at one Example of the rain water storage facility of this invention from the side. FIG. 2 is a partially enlarged plan view in the vicinity of an inlet of the rainwater storage facility shown in FIG. 1. It is a perspective view which shows an example of the resin-made frame | skeleton blocks used for the rainwater storage facility of this invention. It is the schematic diagram which looked at the conventional rain water storage facility from the side. It is the schematic diagram which looked at the other example of the conventional rainwater storage facility from the side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Water storage part 3 Lining layer 4 Resin frame | skeleton block 9 Coating layer 10 Inlet 11 Outlet 15 Sedimentation tank 16 Pumping device 30 Partition wall 40 Sedimentation tank 50 Working hole

Claims (6)

A water storage part having an open upper part provided with a lining layer made of a water-impervious sheet or a semi-permeable sheet on the inner surface, and a plurality of resin skeleton blocks disposed in the water storage part provided with this lining layer In the rainwater storage facility having a space holding skeleton constructed and assembled, a coating layer covering the upper part of the water storage unit, and a rainwater inflow port in the water storage unit, the resin made in the vicinity of the inflow port A precipitation tank is formed by a skeleton block, a partition wall arranged so as to surround the resin skeleton block arranged in the vicinity of the inlet, and a part of the lining layer. Further, a resin skeleton block partly cut is disposed inside the sedimentation tank formed by providing the partition wall, and communicates in the vertical direction from the bottom of the water storage unit for collecting sediment. A plurality of horizontally adjacent ones Rainwater reservoir facility, wherein a working hole formed by the resin skeleton block is provided with Kirikakare.   The rainwater according to claim 1, wherein the partition wall forming the sedimentation tank disposed so as to enclose the inflow port on the inflow side is disposed in three directions so as to enclose the inflow port. Water storage facility.   The rainwater storage facility according to claim 1, wherein the resin skeleton block disposed inside the partition wall is cut at one corner.   The rainwater storage facility according to any one of claims 1 to 3, wherein the resin skeleton block disposed inside the partition wall constitutes a work hole as a set of four. .   The rainwater storage facility according to claim 4, wherein the resin block having a cut corner disposed inside the partition wall is cut into a quarter of a corner.   6. The partition wall according to claim 1, wherein a plurality of water outlets for adjusting the water level inside and outside the partition wall are provided through the partition wall. Rainwater storage facility described in 1.

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