JP4316601B2 - 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 or housing estates, water tanks have been installed in open spaces around buildings and housing areas or in the basement of bicycle storage 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 this water-impervious sheet or semi-permeable sheet is further covered. 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 that is as large as possible can be formed inside, and there is sufficient pressure resistance against the pressure from above the coating layer 9, and the assembly of the resin skeleton blocks 4 is easy. 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 precipitated 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.

  In view of the above-mentioned problems, the object of the present invention is to provide a rainwater storage facility that does not require a new installation place when installing a sedimentation tank, is easy to install, and can greatly reduce construction costs. It is in.

In order to achieve the above object, the rainwater storage facility according to claim 1 of the present invention is provided by digging down the ground and having an inner surface provided with a lining layer made of a water-impervious sheet or a semi-permeable sheet. In the rainwater storage facility, the rainwater storage facility has a water storage section, a space holding skeleton that is configured by assembling a plurality of resin skeleton blocks disposed in the water storage section, and a covering layer that covers the upper portion of the water storage section. The water storage facility further has a rainwater inflow port in the water storage part, and a resin cutout part is cut out in an area formed by the lining layer and the resin partition wall surrounding the inflow port. A lining layer that has a sedimentation tank in which work holes are formed by arranging notch skeleton blocks in continuous combination so that a work space can be formed so that a work space can be formed, and does not surround the inlet And partition In the region formed by the above, a resin skeleton block without notches is arranged vertically and horizontally to form a water reservoir, and further, both sides of the partition wall partitioning the settling tank and the water reservoir are: The notch skeleton block and the resin skeleton block are arranged so as to face the partition wall .

According to the rainwater storage facility according to claim 1, the resin skeleton block disposed in the vicinity of the inlet of the reservoir and in the vicinity of the inlet of the reservoir is disposed on the inlet side. A sedimentation tank is provided by partitioning with a partition wall made of resin so as to be enclosed. Therefore, it is not necessary to think from the beginning of an annoying problem such as where to place a new settling tank.
In addition, since a settling tank is installed using a part of the water storage part, the construction cost can be reduced. 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.
Furthermore, since the partition wall is made of resin, unlike the conventional wall made of concrete, the weight is light and the construction is much easier. Therefore, the overall construction cost can be greatly reduced.

Further, the rainwater storage facility according to claim 2 of the present application includes a water storage unit that is provided by digging down the ground and has an inner surface provided with a lining layer made of a water-impervious sheet or a semi-permeable sheet. A rainwater storage facility having a space holding skeleton arranged in a section and configured by assembling a plurality of resin skeleton blocks, and a covering layer covering the upper portion of the water storage section, the rainwater storage facility further including the water storage section In the region formed by the lining layer and the resin partition wall that enclose the inflow port, the resin notch skeleton block partially cut away is provided with the cutout skeleton block. It has a sedimentation tank that has work holes formed by continuously combining the notch parts of the notch skeleton block so that a work space can be formed, and is formed by a lining layer that does not surround the inlet and a partition wall In the area In order to form a water storage part by arranging a resin skeleton block without notches vertically and horizontally, and further, both sides of the partition wall partitioning the settling tank and the water storage part are the notch skeleton block and the A resin skeleton block is arranged so as to face the partition wall, and the partition wall is used for adjusting the pressure level applied to the partition wall by adjusting the water level on the sedimentation tank side and the water tank side of the wall. A plurality of water outlets are provided through the wall .
According to the rainwater storage facility according to claim 2, the 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, Since the wall is provided so as to penetrate, the water level in the settling tank always partitioned by the wall and the water storage section outside the wall can be maintained at substantially the same level.
Therefore, for example, the water level on the settling tank side is higher than the water level in the water storage section, and it is preferable that there is less fear that the partition wall made of resin will be damaged due to a large water pressure.

Furthermore, the rainwater storage facility according to claim 3 of the present application is the rainwater storage facility according to claim 1 or claim 2, wherein the notched skeleton block disposed in the settling tank is disposed in the water storage portion. A portion of the resin skeleton block to be arranged is cut out. Moreover, the rainwater storage facility according to claim 4 of the present application is the rainwater storage facility according to claim 1 or 2, wherein a small sedimentation tank is provided in the middle of the flow path leading to the inlet of the water storage section. It is characterized by removing stones and gravel. Further, the rainwater storage facility according to claim 5 of the present application is the rainwater storage facility according to claim 1 or claim 2, wherein the covering layer covering the upper portion of the water storage portion is made of a resin top plate, It has a water-impervious sheet or semi-permeable sheet covering the plate, and a soil layer covering the water-impervious sheet or semi-permeable sheet. Further, the rainwater storage facility according to claim 6 of the present application is the rainwater storage facility according to claim 2, wherein a plurality of water inlets are provided so as to pass through the partition wall and connect the settling tank and the water storage unit. Has a radius of about 10 mm.

  As described above, according to the rainwater storage facility of the present invention, there is no particular problem of how to install the settling tank, and it is easy to install and can reduce the construction cost significantly. Facilities can be provided.

  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. FIG. 2 is a partial plan view of the sedimentation 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, and then preventing surrounding earth and sand from flowing into the 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 force due to a water pressure difference 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 is adopted as the partition wall 30, the construction cost can be further reduced.

  Moreover, according to the rainwater storage facility of the present invention, since the settling tank is provided in the water storage part 2 covering the inner surface with the lining layer 3 formed of a water-impervious sheet or a semi-permeable sheet, FIG. What is the connection 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 was a problem of the conventional water storage facility shown In the first place, there is no problem. 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.

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)

Assemble a water storage part with an open top with a lining layer made of a water-impervious sheet or semi-permeable sheet on the inner surface provided by digging down the ground, and a plurality of resin skeleton blocks arranged in the water storage part In the rainwater storage facility having a space holding skeleton configured as described above and a covering layer covering the upper portion of the water reservoir, the rainwater reservoir further has a rainwater inlet in the water reservoir,
Inside the area formed by the lining layer and the resin partition wall that encloses the inflow port, a cutout skeleton block made of resin that is partly cut out, and a cutout part of the cutout skeleton block is a work space. It has a sedimentation tank in which working holes are formed by arranging them continuously in combination so that they can be formed,
Inside the region formed by the lining layer that does not surround the inflow port and the partition wall, a resin skeleton block without notches is arranged vertically and horizontally to form a water reservoir,
Furthermore, the both sides of the partition wall partitioning the settling tank and the water storage section are arranged so that the notched skeleton block and the resin skeleton block face the partition wall. Rainwater storage facility. Assemble a water storage part with an open top with a lining layer made of a water-impervious sheet or semi-permeable sheet on the inner surface provided by digging down the ground, and a plurality of resin skeleton blocks arranged in the water storage part In the rainwater storage facility having a space holding skeleton configured as described above and a covering layer covering the upper portion of the water reservoir, the rainwater reservoir further has a rainwater inlet in the water reservoir,
Inside the area formed by the lining layer and the resin partition wall that encloses the inflow port, a cutout skeleton block made of resin that is partly cut out, and a cutout part of the cutout skeleton block is a work space. It has a sedimentation tank in which working holes are formed by arranging them continuously in combination so that they can be formed,
Inside the region formed by the lining layer that does not surround the inflow port and the partition wall, a resin skeleton block without notches is arranged vertically and horizontally to form a water reservoir,
Furthermore, both sides of the partition wall that partitions the settling tank and the water storage section are arranged so that the notch skeleton block and the resin skeleton block face the partition wall,
The partition wall is provided with a plurality of water outlets penetrating the wall for adjusting the pressure level applied to the partition wall by adjusting the water level on the sedimentation tank side and the water storage tank side of the wall. A rainwater storage facility. 3. The cutout skeleton block disposed in the settling tank is obtained by cutting out a part of the resin skeleton block disposed in the water storage section. Rainwater storage facility. The rainwater storage facility according to claim 1 or 2, wherein a small sedimentation tank is provided in the middle of the flow path connected to the inlet of the water storage section to remove stones and gravel.   The coating layer covering the upper part of the water storage section has a resin top plate, a water-impervious sheet or semi-permeable sheet covering the top plate, and a soil layer covering the water-impervious sheet or semi-permeable sheet. The rainwater storage facility according to claim 1 or 2, characterized in that The rainwater storage facility according to claim 2, wherein a plurality of water inlets provided so as to pass through the partition wall and connect the settling tank and the water storage section have a radius of about 10 mm. .

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