JP7429922B2 - storage system - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to storage systems.

Conventionally, as one of the systems for storing rainwater, there is a first tank made of plastic molded bodies assembled vertically and horizontally, and a second tank installed above the first tank, in which crushed stones are assembled vertically and horizontally. A system has been proposed that includes a second tank (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2002-235362

Here, in the above conventional system, although the first tank and the second tank are provided as described above, the relationship between the permeability of the first tank and the permeability of the second tank is unclear. Therefore, for example, if the permeability of the second tank is the same as or higher than that of the first tank, it will be difficult to take time to pass water through the second tank, which will reduce the effect of peak cutting during heavy rain. Since there is a risk that it will be difficult to sustain the period, there is room for improvement from the perspective of maintaining the storage capacity of the system.

The present invention has been made in view of the above, and an object of the present invention is to provide a storage system that can maintain the storage performance of the storage system.

In order to solve the above-mentioned problems and achieve the purpose, a storage system according to claim 1 is a storage system for storing rainwater, which includes a first storage tank buried underground, and a first storage tank buried in the ground. and the first storage tank, the second storage tank having a permeability lower than that of the first storage tank, and the first storage tank and the first storage tank. A third storage tank provided between the second storage tank and the third storage tank, which has a different configuration from the first storage tank and the second storage tank, and has substantially the same permeability as the second storage tank. a third storage tank having a permeability of It is formed by laminating at least one or more layers.

In the storage system according to claim 2, in the storage system according to claim 1, the first storage tank has at least a first storage section formed by arranging a plurality of resin blocks in parallel in the vertical direction. It is formed by laminating one or more layers.

In the storage system according to claim 3, in the storage system according to claim 1 or 2, the second storage tank has a second storage section made of sand, gravel, gravel, crushed stone, or soil that extends at least vertically. It is formed by laminating one or more layers.

The storage system according to claim 4 is the storage system according to any one of claims 1 to 3 , including: a water-blocking sheet provided to cover the periphery of the first storage tank; A pumping means for pumping up rainwater stored in the storage tank to a predetermined position.

According to the storage system according to claim 1, the first storage tank includes a first storage tank buried underground, and a second storage tank provided between the ground surface and the first storage tank, Since the second storage tank has a permeability lower than that of the tank, the permeability of the second storage tank is the same as or higher than that of the first storage tank. It takes time to pass water through the storage tank. Therefore, in the area where the storage system is installed, the effect period of peak cuts during times of heavy rain, etc. can be sustained, and the storage performance of the storage system can be easily maintained.
Further, a third storage tank provided between the first storage tank and the second storage tank, which has a different configuration from the first storage tank and the second storage tank, and which has a structure different from that of the first storage tank and the second storage tank, Since the third storage tank is provided with a permeability that is approximately the same as that of the storage system, the period of peak cut effect during heavy rains can be sustained in the area where the storage system is installed, compared to the case where the third storage tank is not provided. , it becomes easier to maintain the functionality of the storage system.
Further, the third storage tank is formed by horizontally arranging a plurality of resin blocks and stacking at least one third storage part filled with sand in the vertical direction. , the third storage tank can have relatively high purification performance and durability, and the usability and installability of the third storage tank can be improved.

According to the storage system according to claim 2, the first storage tank is formed by vertically stacking at least one first storage section formed by horizontally arranging a plurality of resin blocks. Therefore, the first storage tank can have relatively high permeability and durability, and the usability and installability of the first storage tank can be improved.

According to the storage system according to claim 3, the second storage tank is formed by vertically stacking at least one second storage section made of sand, gravel, gravel, crushed stone, or soil. Therefore, the second storage tank can have relatively high purification performance and a design that easily adapts to the installation environment, and the usability and installability of the second storage tank can be improved.

According to the storage system according to claim 4 , the water-blocking sheet provided to cover the periphery of the first storage tank and the pumping means for pumping up the rainwater stored in at least the first storage tank to a predetermined position are provided. Therefore, the rainwater stored in at least the first storage tank can be pumped up to a predetermined position, and the rainwater can be utilized at the predetermined position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view schematically showing an installation location and a storage system according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (partially shown is omitted). 3 is a diagram showing an overview of a storage system according to a second embodiment, and is a diagram showing an area corresponding to FIG. 2. FIG. 3 is a diagram showing an overview of a storage system according to Embodiment 3, and is a diagram showing an area corresponding to FIG. 2. FIG. 3 is a diagram showing a modification of the storage system according to the second embodiment, and is a diagram showing an area corresponding to FIG. 2. FIG. 3 is a diagram showing a modification of the storage system according to Embodiment 2, and is a diagram showing an area corresponding to FIG. 2. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a storage system according to the present invention will be described in detail below with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be explained, then [II] the specific contents of the embodiment will be explained, and finally [III] modifications to the embodiment will be explained. However, the present invention is not limited to the embodiments.

[I] Basic Concept of Embodiment First, the basic concept of the embodiment will be explained. Embodiments generally relate to a storage system for storing rainwater.

Here, "rainwater" means water generated by natural phenomena such as rainfall, snow, and sleet. In addition, "storage" means temporarily storing water. Note that the period and amount of "storage" are not limited. In addition, although the storage system can be applied to any target, for example, various structures (for example, single-family houses, apartment complexes, office buildings, commercial facilities, public facilities (roads, reservoirs, regulating ponds, etc.), or parking Although the concept includes green belts, fallow land, etc. provided near parking lots, etc., in the embodiment, description will be given as green belts provided near roads or parking lots.

[II] Specific contents of the embodiment Next, specific contents of the embodiment will be described.

[Embodiment 1]
First, a storage system according to Embodiment 1 will be explained. This Embodiment 1 is a form provided with a 1st storage tank and a 2nd storage tank.

(Configuration - Installation location)
First, the configuration of the installation location where the storage system 30 according to the first embodiment is installed will be described. FIG. 1 is a plan view showing an installation location and an overview of a storage system 30 according to Embodiment 1 of the present invention. Here, the X direction in Fig. 1 is the left-right direction of the ground 1 at the installation location (-X direction is the left direction of the ground 1, the +X direction is the right direction of the ground 1), and the Y direction in Fig. 1 is the longitudinal direction of the ground 1 ( The +Y direction is the front of the ground 1, the -Y direction is the back of the ground 1), and the Z direction in Fig. 2, which will be described later, is the vertical direction of the ground 1 (the +Z direction is the upward direction of the ground 1, and the -Z direction is the back of the ground 1). downward direction).

The ground 1 is approximately flat ground (or may be uneven ground) on which a structure (not shown) is installed, and the area of this ground 1 is specifically as shown in FIG. It is roughly divided into a drainage area 2, a first storage area 3, and a second storage area 4.

(Configuration - Installation location - Drainage area)
Drainage area 2 is an area where drainage equipment 10 is installed. At least one drainage area 2 is provided near a structure (specifically, a road, a parking lot, etc.) on the ground 1, and specifically, as shown in FIG. A plurality of them are arranged on the left side and upper part of the ground 1 when viewed from the ground.

Here, the specific type of "drainage equipment 10" is arbitrary, but for example, a drainage channel 11 (for example, a well-known seepage trench, etc.) for sending rainwater that has permeated into the ground 1 to a drainage basin 12, This includes a drainage basin 12 (for example, a well-known seepage basin) that collects rainwater sent through the drainage channel 11.

(Configuration - Installation location - 1st storage area)
The first storage area 3 is an area where a storage facility 20 for storing rainwater around a structure (specifically, a road, a parking lot, etc.) is installed. At least one first storage area 3 is provided in a portion of the ground 1 corresponding to the structure, and specifically, as shown in FIG. There are multiple locations.

Here, although the specific type of "storage equipment 20" is arbitrary, for example, a storage tank for storing rainwater (as an example, a known rainwater storage tank) is applicable.

(Configuration - Installation location - 2nd storage area)
The second storage area 4 is an area where a storage system 30 for storing rainwater collected on the ground between the drainage area 2 and the first storage area 3 is installed. At least one second storage area 4 is provided in a portion of the ground 1 corresponding to a green belt, and specifically, as shown in FIG. and the first storage area 3.

(Configuration - storage system)
Next, the configuration of the storage system 30 according to the first embodiment will be described. FIG. 2 is a sectional view taken along the line AA in FIG. 1 (partially not shown).

As shown in FIGS. 1 and 2, this storage system 30 is provided in a recess 4a formed by excavating the second storage area 4, and includes a support portion 40, a first storage tank 50, and a second storage tank 50. A storage tank 60 is provided.

Here, although the specific shape and size of the recess 4a are arbitrary, they are set as follows in the first embodiment.

That is, as shown in FIG. 2, the cross-sectional shape of the recess 4a along the YZ plane is set to be approximately rectangular. However, the shape is not limited to this, and may be set to, for example, a substantially trapezoidal shape, a substantially semicircular shape, a substantially semielliptical shape, or the like.

Further, the length of the recess 4a in the left-right direction is set to be approximately the same as the length of the second storage area 4 in the left-right direction (or set shorter than the length of the second storage area 4 in the left-right direction). The length of the recess 4a in the front-rear direction is set to be approximately the same as the length of the second storage area 4 in the front-rear direction (or set shorter than the length of the second storage area 4 in the front-rear direction). ), the vertical length of the recess 4a is set to be approximately the same as the vertical length of the poorly permeable layer 4b of the second storage region 4 (or the vertical length of the poorly permeable layer 4b (It may be set shorter than the length of ).

Note that the "impermeable layer 4b" refers to a geological layer formed of clay, consolidated rock, etc., and having lower water permeability than the permeable layer 4c. Moreover, the "permeable layer 4c" means a stratum located below the hardly permeable layer 4b and saturated with groundwater.

(Configuration - Storage system - Support part)
The support part 40 is a support means for supporting the first storage tank 50 and the second storage tank 60, and is buried below the first storage tank 50 and the second storage tank 60, as shown in FIG. It is provided with a support layer 41 and an unevenness adjustment part 42.

(Configuration - Storage system - Support part - Support layer)
The support layer 41 is the basic structure of the support part 40, and is made of, for example, a known support material (for example, crushed stone, etc.), and is laid over the entire bottom part of the recess 4a, as shown in FIG. has been done.

(Configuration - Storage system - Support part - Unevenness adjustment part)
The unevenness adjustment section 42 is an unevenness adjustment means for adjusting the unevenness of the support layer 41, and is configured using, for example, known unevenness support means (for example, unevenness support means made of sand or the like). As shown in FIG. 2, it is laid over the entire upper surface of the support layer 41.

(Configuration - Storage system - 1st storage tank)
The first storage tank 50 is a part of the basic structure of the storage system 30, and is a storage tank for storing rainwater. This first storage tank 50 is buried underground, and specifically, as shown in FIG. 2, it is buried above the support part 40 in the recess 4a.

Further, the specific configuration of the first storage tank 50 can be arbitrarily configured as long as relatively high permeability and durability can be ensured. direction) by laminating at least one or more layers.

Specifically, as shown in FIG. 2, it is formed by stacking and laying a plurality of first storage sections 51 in the vertical direction over the entire upper surface of the unevenness adjustment section 42 of the support section 40. Specifically, the first storage tank 50 is formed so that the length in the vertical direction is longer than the length in the vertical direction of the support part 40 (however, this is not limited to this, for example, (It may be formed to be shorter or longer than the length in the vertical direction).

(Configuration - Storage system - 1st storage tank - 1st storage part)
Here, the "first storage section 51" is the basic structure of the first storage tank 50, and in the first embodiment, the plurality of resin block bodies 52 (for example, relatively high durability (specifically, , pressure resistance) and higher storage performance than the second storage section 61 described later, and is a storage section formed by horizontally arranging approximately cage-shaped resin block bodies 52) that can be connected to each other. . Specifically, as shown in FIG. 2, it is formed by arranging a plurality of resin block bodies 52 in parallel in the left-right direction and the front-back direction. However, the present invention is not limited thereto, and may be formed by, for example, arranging a plurality of non-resin blocks (for example, blocks made of concrete, metal, stone, etc.) in parallel in the horizontal direction.

Further, the number of stacked layers of the first storage section 51 can be set arbitrarily as long as a desired amount of storage can be obtained, and in the first embodiment, it is set to six. However, the number is not limited to this, and for example, the number may be set to less than six, or may be set to seven or more.

(Configuration - Storage system - 1st storage tank - Others)
Although the method for installing the first storage tank 50 is arbitrary, in the first embodiment, as shown in FIG. 53 etc.), unnecessary substances (for example, sand, mud, wood chips, etc.) (not shown) contained in rainwater enter at least a part of the first storage tank 51, thereby causing the first storage tank 50 to be covered with water. Decrease in permeability can be suppressed. However, the present invention is not limited to this, and for example, the water-permeable sheet 53 may be omitted and installed.

With such a configuration of the first storage tank 50, the first storage tank 50 can have relatively high permeability and durability, and the usability and installability of the first storage tank 50 can be improved.

(Configuration - Storage system - 2nd storage tank)
The second storage tank 60 is another part of the basic structure of the storage system 30, and is a storage tank for storing rainwater. The second storage tank 60 is provided between the ground surface of the second storage area 4 and the first storage tank 50, and specifically, as shown in FIG. The second storage tank 60 is provided above the first storage tank 50 so that the upper surface thereof is exposed to the outside.

Further, regarding the specific configuration of the second storage tank 60, it has a permeability lower than that of the first storage tank 50 (specifically, a permeability lower than the permeability of the permeable layer 4c, etc.). Although it can be configured as desired, in the first embodiment, it is formed by stacking at least one second storage section 61 in the vertical direction.

Specifically, as shown in FIG. 2, it is formed by laying one second storage section 61 over the entire upper surface of the first storage tank 50. is formed so that the length in the vertical direction is shorter than the length in the vertical direction of the first storage tank 50 (however, the invention is not limited to this, for example, the length in the vertical direction is shorter than the length in the vertical direction of the first storage tank 50 (may be formed to be long or substantially identical).

(Configuration - Storage system - 2nd storage tank - 2nd storage part)
Here, the "second storage section 61" is the basic structure of the second storage tank 60, and in the first embodiment, it is a storage section made of sand, gravel, gravel, crushed stone, or soil, and is specifically As shown in FIG. 2, it includes a lower layer 62, an intermediate layer 63, and an upper layer 64.

(Configuration - Storage system - Second storage tank - Second storage part - Lower layer)
The lower layer 62 is a part of the basic structure of the second storage section 61, and is made of, for example, gravel, gravel, or crushed stone having a predetermined diameter, and as shown in FIG. 1 storage section 51 over the entire upper surface thereof.

(Configuration - Storage system - Second storage tank - Second storage part - Middle layer)
The middle layer 63 is another part of the basic structure of the second storage section 61, and is made of, for example, sand, gravel, gravel, or soil having a diameter larger than that of the gravel of the lower layer 62. As shown in FIG. 2, it is laid over the entire upper surface of the lower layer 62.

(Configuration - Storage system - Second storage tank - Second storage part - Upper layer)
The upper layer 64 is another part of the basic structure of the second storage section 61, and is soil having a diameter larger than that of sand or the like of the middle layer 63, and is soil in which plants P can be planted. (For example, natural soil containing gravel, etc.) or gravel is used, and as shown in FIG. 2, it is laid over the entire upper surface of the intermediate layer 63.

Furthermore, the number of stacked layers of the second storage section 61 can be set arbitrarily as long as a desired amount of storage can be obtained, and in the first embodiment, as described above, it is set to one. However, the number is not limited to this, and for example, it may be set to two or more.

With this configuration of the second storage tank 60, the second storage tank 60 can have relatively high purification performance and a design that is easy to adapt to the installation environment, and the usability and installation of the second storage tank 60 can be improved. can be increased. In particular, since plants P can be planted in the upper layer 64, it is easy to match the design of the first storage area 3, and biodiversity conservation can be achieved.

With the storage system 30 as described above, it takes less time to pass water through the second storage tank 60 than when the permeability of the second storage tank 60 is the same as or higher than the permeability of the first storage tank 50. can be multiplied by Therefore, in the second storage region 4, the effective period of peak cuts during times of heavy rain, etc. can be sustained, and the storage performance of the storage system 30 can be easily maintained.

(About the action of the storage system)
Next, the operation of the storage system 30 configured in this way will be explained.

For example, when it rains, the rainwater that collects on the ground surface of the second storage area 4 permeates into the second storage tank 60 and is stored therein. In this case, since it is possible to take time for the rainwater to pass through the second storage tank 60, it becomes easier to avoid the storage amount of the first storage tank 50 from becoming full immediately. Moreover, since the rainwater can be purified by the passage, it is suppressed that the permeability of the first storage tank 50 is reduced due to unnecessary substances contained in the rainwater entering at least a part of the first storage section 51.

Next, the rainwater stored in the second storage tank 60 is stored while permeating into the first storage tank 50. Specifically, when the storage amount of the first storage tank 50 does not exceed the threshold value, the rainwater is stored in the first storage tank 50, and when the storage amount of the first storage tank 50 exceeds the threshold value, the rainwater is stored in the first storage tank 50. It is stored across the first storage tank 50 and the second storage tank 60.

Then, the rainwater stored in the first storage tank 50 moves downward through the support layer 41 to permeate into the permeable layer 4c of the second storage area 4.

Due to the above-mentioned effects, during heavy rains, etc., while storing rainwater in the first storage tank 50 or the second storage tank 60, the rainwater is stored in the first storage tank 50 or the second storage tank 60 so that the rainwater does not overflow onto the ground surface of the second storage area 4. Since water can be drained into the permeable layer 4c of the second storage area 4, the period of peak cut effect during times of heavy rain etc. can be sustained in the second storage area 4.

(Construction method of storage system)
Next, a method of constructing the storage system 30 will be explained. The construction method of the storage system 30 according to the first embodiment includes a forming step, a first installation step, a second installation step, a third installation step, and a planting step.

(Construction method of storage system - formation process)
First, the formation process will be explained. The forming step is a step of forming the recess 4a in the second storage region 4.

Specifically, the second storage area 4 is formed by excavating the second storage area 4 using a known excavation tool or the like.

(Construction method of storage system - first installation process)
Next, the first installation step will be explained. The first installation step is a step, after the formation step, of installing the support portion 40 in the recess 4a formed in the formation step.

Specifically, after the support layer 41 is laid down over the entire bottom portion of the recess 4a using a known method, the unevenness adjustment section 42 is installed over the entire upper surface of the support layer 41.

(Construction method of storage system - second installation process)
Next, the second installation step will be explained. The second installation process is a process of installing the first storage tank 50 in the recess 4a formed in the formation process after the first installation process.

Specifically, using a known method, a water-permeable sheet 53 is installed over the side wall portion of the recess 4a and the upper surface of the unevenness adjustment portion 42 of the support portion 40, and a plurality of water-permeable sheets are provided over the entire upper surface of the unevenness adjustment portion 42. The first storage sections 51 are laid in a vertically stacked manner, and then the upper surfaces of the plurality of first storage sections 51 are covered with a water-permeable sheet 53 for installation.

Regarding the resin block bodies 52 in the plurality of first reservoirs 51, it is also possible to effectively disperse the force applied to the first reservoir tank 50 by connecting adjacent resin block bodies 52 to each other. good.

(Construction method of storage system - 3rd installation process)
Next, the third installation step will be explained. The third installation process is a process of installing the second storage tank 60 in the recess 4a formed in the formation process after the second installation process.

Specifically, first, a predetermined amount of gravel, etc. is poured into the recess 4a, and then the introduced gravel, etc. is leveled using a known leveling device and then compacted, thereby converting the lower layer 62 into the first storage tank. 50 over the entire top surface. Next, a predetermined amount of sand, etc. is further poured into the recess 4a, and then the loaded sand, etc. is compacted using a compacting device, and then the surface of the compacted sand, etc. is leveled using the above-mentioned leveling device. As a result, the intermediate layer 63 is laid over the entire upper surface of the lower layer 62. Thereafter, a predetermined amount of soil, etc. is poured in, and then the introduced soil, etc. is leveled using the above-mentioned leveling tool, thereby laying the upper layer 64 over the entire upper surface of the middle layer 63, thereby installing it.

(Construction method of storage system - planting process)
Next, the planting process will be explained. The planting process is a process of planting the plants P after the third installation process.

Specifically, plants P are planted in the upper layer 64 installed in the third installation step. With this, construction of the storage system 30 is completed.

With the construction method described above, the storage system 30 shown in FIG. 2 can be constructed without using any special method, and the workability of the storage system 30 can be improved.

(Effects of Embodiment 1)
According to the first embodiment, the first storage tank 50 is buried underground, and the second storage tank 60 is provided between the ground surface and the first storage tank 50. A second storage tank 60 having a permeability lower than that of the first storage tank 50 is provided, so when the permeability of the second storage tank 60 is the same as or higher than the permeability of the first storage tank 50. Compared to this, it can take time to pass water through the second storage tank 60. Therefore, in the area where the storage system 30 is provided, the effective period of peak cuts during times of heavy rain, etc. can be sustained, and the storage performance of the storage system 30 can be easily maintained.

Moreover, since the first storage tank 50 is formed by stacking at least one first storage part 51 in the vertical direction, which is formed by horizontally arranging a plurality of resin block bodies 52, the first storage tank 50 The tank 50 can have relatively high permeability and durability, and the usability and installability of the first storage tank 50 can be improved.

Moreover, since the second storage tank 60 is formed by stacking at least one second storage part 61 made of sand, gravel, gravel, crushed stone, or soil in the vertical direction, the second storage tank 60 is It can have relatively high purification performance and a design that easily adapts to the installation environment, and the usability and installation ease of the second storage tank 60 can be improved.

[Embodiment 2]
Next, a storage system according to Embodiment 2 will be explained. This Embodiment 2 is a form provided with a 1st storage tank, a 2nd storage tank, and a 3rd storage tank. However, the configuration of this second embodiment is approximately the same as the configuration of the first embodiment, unless otherwise specified, and the configuration that is approximately the same as the configuration of the first embodiment is not used in this first embodiment. The same reference numerals and/or names as previously used will be used as necessary, and their explanation will be omitted.

(Configuration - Installation location)
First, the configuration of the installation location according to the second embodiment will be explained. The ground 1 at the installation location according to the second embodiment has the same structure as the ground 1 according to the first embodiment. Further, the area of the ground 1 according to the second embodiment is divided into the same areas as the ground 1 according to the first embodiment.

(Configuration - storage system)
Next, the configuration of the storage system 100 according to the second embodiment will be described. FIG. 3 is a diagram showing an overview of the storage system 100 according to the second embodiment, and is a diagram showing an area corresponding to FIG. 2.

As shown in FIG. 3, the storage system 100 according to the second embodiment is provided in the recess 4a of the second storage area 4, and includes a support section 40, a first storage tank 50, a second storage tank 60, and A third storage tank 110 is provided.

(Configuration - Storage system - Support part)
The support section 40 according to the second embodiment has substantially the same configuration as the support section 40 according to the first embodiment.

(Configuration - Storage system - 1st storage tank)
The first storage tank 50 according to the second embodiment is constructed by stacking at least one first storage section 51 in the vertical direction (vertical direction), in substantially the same way as the first storage tank 50 according to the first embodiment. It is formed.

Specifically, as shown in FIG. 3, it is formed by laying one first storage section 51 over the entire upper surface of the unevenness adjustment section 42 of the support section 40. 1 storage tank 50 is formed so that the length in the vertical direction is approximately the same as the length in the vertical direction of the support part 40 (however, the present invention is not limited to this; for example, the length in the vertical direction of the support part 40 is may also be formed to be shorter or longer).

(Configuration - Storage system - 2nd storage tank)
The second storage tank 60 according to the second embodiment is provided between the ground surface of the second storage area 4 and the first storage tank 50, and specifically, as shown in FIG. In 4a, the second storage tank 60 is provided above the first storage tank 50 at an interval so that the upper surface of the second storage tank 60 is exposed to the outside.

Further, although the specific configuration of the second storage tank 60 is arbitrary, in the second embodiment, the second storage part 61 is arranged vertically in substantially the same manner as the configuration of the second storage tank 60 according to the first embodiment. It is formed by laminating at least one or more layers in the direction.

Specifically, as shown in FIG. 3, it is formed by laying one second storage section 61 over the entire upper surface of the third storage tank 110. is formed so that the length in the vertical direction is approximately the same as the length in the vertical direction of the first storage tank 50 (however, this is not limited to this, for example, the length in the vertical direction of the first storage tank 50 may also be formed to be shorter or longer).

(Configuration - Storage system - Third storage tank)
The third storage tank 110 is another part of the basic structure of the storage system 100, and is a storage tank for storing rainwater. This third storage tank 110 is provided between the first storage tank 50 and the second storage tank 60, and specifically, as shown in FIG. It is buried from the upper end of 50 to the lower end of second storage tank 60.

Further, the specific configuration of the third storage tank 110 is different from the first storage tank 50 and the second storage tank 60, and has approximately the same permeability as the second storage tank 60. Although it can be arbitrarily configured as long as it has, in the embodiment, it is formed by stacking at least one third storage section 111 in the vertical direction.

Specifically, as shown in FIG. 3, it is formed by stacking and laying a plurality of third storage parts 111 in the vertical direction over the entire upper surface of the first storage tank 50. , the length of the third storage tank 110 in the vertical direction is longer than the length of the first storage tank 50 in the vertical direction (however, the configuration is not limited to this, for example, the length of the first storage tank 50 is (The length in the vertical direction may be shorter than or substantially the same as the length in the vertical direction.)

(Configuration - Storage system - Third storage tank - Third storage part)
Here, the "third storage section 111" is the basic structure of the third storage tank 110, and in the second embodiment, a plurality of resin block bodies 112 (for example, the resin block body 52 of the first storage section 51) This is a storage section formed by horizontally arranging resin blocks (resin blocks having substantially the same structure as the above) and filled with sand 113.

Specifically, as shown in FIG. 3, a plurality of resin block bodies 112 are arranged side by side in the left-right direction and front-back direction, and a plurality of third storage parts 111 filled with sand 113 are stacked in the vertical direction. It is formed by this. However, the present invention is not limited to this, and for example, a storage section formed by horizontally arranging a plurality of non-resin block bodies and filled with a material other than sand 113 (for example, gravel, gravel, etc.) There may be.

Furthermore, the number of stacked layers of the third storage section 111 can be set arbitrarily as long as a desired storage amount can be obtained, and in the embodiment, it is set to two. However, the number is not limited to this, and for example, it may be set to one, or it may be set to three or more.

With such a configuration of the third storage tank 110, the third storage tank 110 can have relatively high purification performance and durability, and the usability and installability of the third storage tank 110 can be improved.

With the storage system 100 as described above, compared to the case where the third storage tank 110 is not provided, the effect period of peak cut during heavy rain etc. can be sustained in the second storage area 4, and the function of the storage system 100 can be further maintained. It becomes easier.

(About the action of the storage system)
Next, the operation of the storage system 100 configured as described above will be explained.

For example, when it rains, the rainwater that collects on the ground surface of the second storage area 4 permeates into the second storage tank 60 and is stored therein.

Next, the rainwater stored in the second storage tank 60 is stored while permeating into the third storage tank 110. In this case, since it is possible to take time for the rainwater to pass through the third storage tank 110, it is easy to avoid the storage amount of the first storage tank 50 or the third storage tank 110 from becoming full immediately. Become. Moreover, since the rainwater can be purified by the passage, it is suppressed that the permeability of the first storage tank 50 is reduced due to unnecessary substances contained in the rainwater entering at least a part of the first storage section 51.

Next, the rainwater stored in the third storage tank 110 permeates into the first storage tank 50 and is stored therein. Specifically, when the storage amount of the first storage tank 50 does not exceed the threshold value, the rainwater is stored in the first storage tank 50, and when the storage amount of the first storage tank 50 exceeds the threshold value, the rainwater is stored in the first storage tank 50. The water is stored in the first storage tank 50, the second storage tank 60, and the third storage tank 110.

Then, the rainwater stored in the first storage tank 50 moves downward through the support layer 41 to permeate into the permeable layer 4c of the second storage area 4.

Due to the above-described actions, during heavy rains, etc., while rainwater is stored in the first storage tank 50, second storage tank 60, or third storage tank 110, the rainwater does not overflow onto the ground surface of the second storage area 4. Since the rainwater can be drained into the permeable layer 4c of the second storage area 4, the effective period of peak cuts during heavy rains etc. can be maintained in the second storage area 4.

(Construction method of storage system)
Next, a construction method for the storage system 100 will be explained. The construction method of the storage system 100 according to the second embodiment includes a forming step, a first installation step, a second installation step, a third installation step, a fourth installation step, and a planting step. Note that the formation process, first installation process, second installation process, and planting process according to Embodiment 2 are the same as the formation process, first installation process, second installation process, and planting process according to Embodiment 1. Since this process is performed in substantially the same manner as above, the explanation thereof will be omitted below.

(Construction method of storage system - 3rd installation process)
Next, the third installation step will be explained. The third installation process is a process of installing the third storage tank 110 in the recess 4a formed in the formation process after the second installation process.

Specifically, by using a known method, a plurality of resin block bodies 112 are arranged side by side in the left-right direction and front-back direction over the entire upper surface of the first storage tank 50, and then sand 113 is thrown into the recess 4a. The filled third reservoir 111 is installed by stacking a plurality of them in the vertical direction.

Regarding the resin block bodies 112 of the plurality of third storage parts 111, it is possible to effectively disperse the force applied to the third storage tank 110 by connecting adjacent resin block bodies 112 to each other. good.

(Construction method of storage system - 4th installation process)
Next, the fourth installation step will be explained. The fourth installation process is a process of installing the second storage tank 60 in the recess 4a formed in the formation process after the third installation process.

Specifically, in substantially the same manner as the third installation step according to the second embodiment, the lower layer 62, middle layer 63, and upper layer 64 of the second storage tank 60 are sequentially laid over the entire upper surface of the third storage tank 110. Install by doing so.

With the construction method described above, the storage system 100 can be constructed without using any special method, and the workability of the storage system 100 can be improved.

(Effects of Embodiment 2)
According to the second embodiment, the third storage tank 110 is provided between the first storage tank 50 and the second storage tank 60, and the third storage tank 110 is provided between the first storage tank 50 and the second storage tank 60. Since the third storage tank 110 has a configuration different from that of the third storage tank 110 and has substantially the same permeability as the second storage tank 60, the storage system 100 is more efficient than the case where the third storage tank 110 is not provided. In the provided area, the effect period of peak cuts during times of heavy rain etc. can be sustained, making it easier to maintain the function of the storage system 100.

Further, the third storage tank 110 is formed by stacking a plurality of resin block bodies 112 horizontally in parallel and at least one third storage part 111 filled with sand 113 in the vertical direction. Therefore, the third storage tank 110 can have relatively high purification performance and durability, and the usability and installability of the third storage tank 110 can be improved.

[Embodiment 3]
Next, a storage system according to Embodiment 3 will be explained. Embodiment 3 is a form that includes a water-blocking sheet and pumping means. However, the configuration of this third embodiment is approximately the same as the configuration of the second embodiment, unless otherwise specified, and the configuration that is approximately the same as the configuration of the second embodiment is used in this second embodiment. The same reference numerals and/or names as previously used will be used as necessary, and their explanation will be omitted.

(Configuration - Installation location)
First, the configuration of the installation location according to the third embodiment will be described. The ground 1 at the installation location according to the third embodiment has the same configuration as the ground 1 according to the second embodiment. Further, the area of the ground 1 according to the second embodiment is divided into the same areas as the ground 1 according to the second embodiment.

(Configuration - storage system)
Next, the configuration of storage system 200 according to Embodiment 3 will be described. FIG. 4 is a diagram showing an overview of the storage system 200 according to the third embodiment, and is a diagram showing an area corresponding to FIG. 2.

As shown in FIG. 4, the storage system 200 according to the third embodiment is provided in the recess 4a of the second storage area 4, and includes a support portion 40, a first storage tank 50, a second storage tank 60, and a second storage tank 60. 3 storage tank 110, a water-blocking sheet 210, and a pumping part 220.

(Configuration - Storage system - Support part)
The support section 40 according to the third embodiment has substantially the same structure as the support section 40 according to the second embodiment.

(Configuration - Storage system - 1st storage tank)
The first storage tank 50 according to the third embodiment is constructed by stacking at least one first storage section 51 in the vertical direction (vertical direction), substantially similar to the first storage tank 50 according to the second embodiment. It is formed.

Specifically, as shown in FIG. 4, a plurality of first storage sections 51 (four first storage sections 51 in FIG. 4) are stacked vertically over the entire upper surface of the unevenness adjustment section 42 of the support section 40. More specifically, the length of the first storage tank 50 in the vertical direction is longer than the length of the support part 40 in the vertical direction.

(Configuration - Storage system - 2nd storage tank)
The second storage tank 60 according to the third embodiment is provided between the ground surface of the second storage area 4 and the first storage tank 50, substantially similar to the second storage tank 60 according to the second embodiment. ing.

Further, although the specific configuration of the second storage tank 60 is arbitrary, in the third embodiment, the second storage part 61 is arranged vertically in substantially the same manner as the configuration of the second storage tank 60 according to the second embodiment. It is formed by laminating at least one or more layers in the direction.

Specifically, as shown in FIG. 4, it is formed by laying one second storage section 61 over the entire upper surface of the third storage tank 110. is formed so that the length in the vertical direction is shorter than the length in the vertical direction of the first storage tank 50 (however, the invention is not limited to this, for example, the length in the vertical direction is shorter than the length in the vertical direction of the first storage tank 50 (may be formed to be long or substantially identical).

(Configuration - Storage system - Third storage tank)
The third storage tank 110 according to the third embodiment is provided between the first storage tank 50 and the second storage tank 60 in substantially the same way as the third storage tank 110 according to the second embodiment, Specifically, as shown in FIG. 4, it is buried in the recess 4a from the upper end of the first storage tank 50 to the lower end of the second storage tank 60.

Further, although the specific configuration of the third storage tank 110 is arbitrary, in the third embodiment, the third storage section 111 is arranged vertically in substantially the same manner as the configuration of the third storage tank 110 according to the second embodiment. It is formed by laminating at least one or more layers in the direction.

Specifically, as shown in FIG. 4, it is formed by laying one third storage section 111 in the vertical direction over the entire upper surface of the first storage tank 50. The length of the storage tank 110 in the vertical direction is formed so as to be shorter than the length in the vertical direction of the first storage tank 50 (however, the present invention is not limited to this; for example, the length in the vertical direction of the first storage tank 50 (It may be formed to be longer than or substantially the same as the length).

(Configuration - Storage system - Third storage tank - Third storage part)
Here, the "third storage section 111" is a storage section made of sand 113 in the third embodiment. However, the present invention is not limited to this, and the storage portion may be made of a material other than the sand 113 (for example, gravel, gravel, soil, etc.).

(Configuration - Storage system - Waterproof sheet)
The water-blocking sheet 210 is a sheet for preventing rainwater stored in the first storage tank 50 from flowing outside. This water-blocking sheet 210 is provided so as to substantially cover the periphery of the first storage tank 50, and specifically, as shown in FIG. They are arranged so as to substantially cover the left surface, right surface, front surface, rear surface) and bottom surface of the tank 50.

Further, although the specific structure of the water-shielding sheet 210 is arbitrary, in the third embodiment, as shown in FIG. It is configured to include a pair of protective layers 212 (for example, protective layers 212 made of resin, etc.) that cover the front and back surfaces of the water layer 211. With such a configuration, the durability of the water-blocking sheet 210 can be increased. However, the present invention is not limited to this, and for example, the water-blocking sheet 210 may be configured to include only the water-blocking layer 211.

(Configuration - Storage system - Pumping section)
The pumping unit 220 is a pumping means that pumps up at least the rainwater stored in the first storage tank 50 to a predetermined position. This pumping unit 220 includes, for example, a known pumping means (for example, a pumping pump 221) and rainwater pumped up by the pumping pump 221 to a rainwater utilization facility 230 (for example, a faucet or fountain facility installed on the ground). It is configured using a pumping pipe 222 for transporting water, etc.), and is buried across the first storage tank 50, the second storage tank 60, and the third storage tank 110. Specifically, as shown in FIG. 4, a pumping pump 221 is buried in the first storage tank 50, and a pumping pipe 222 is connected to the first storage tank 50, the second storage tank 60, and the third storage tank 110. It is buried throughout.

Note that the pumping amount per unit time of the pumping section 220 is arbitrary, but may be set to be larger than the amount of rainwater permeating into the second storage section 61 per unit time, for example. This makes it easier to prevent rainwater stored in the first storage tank 50 or the second storage tank 60 from overflowing onto the ground surface of the second storage area 4 during heavy rains or the like. However, the present invention is not limited to this, and for example, the amount may be set to be less than or substantially the same as the amount of rainwater permeating into the second storage section 61 per unit time.

With such a configuration of the pumping part 220, the rainwater stored in at least the first storage tank 50 can be pumped up to a predetermined position, and the rainwater can be utilized at the predetermined position.

(About the action of the storage system)
Next, the operation of the storage system 200 configured as described above will be explained.

For example, in substantially the same way as the storage system 100 according to the second embodiment, when it rains, the rainwater accumulated on the ground surface of the second storage area 4 permeates into the second storage tank 60 and the third storage tank 110. It sequentially moves downward, and then permeates into the first storage tank 50 and is stored therein. In this case, since the first storage tank 50 is surrounded by a water-shielding sheet 210, the rainwater stored in the first storage tank 50 flows through the permeable layer 4c of the second storage area 4 through the support layer 41. Since it is suppressed from moving downward toward , it becomes easier to be retained in the first storage tank 50 .

Then, when a predetermined timing (for example, the timing when a predetermined operation is performed on the rainwater utilization equipment 230) arrives, the rainwater stored in the first storage tank 50 is pumped up to the rainwater utilization equipment 230 by the pumping unit 220. The rainwater is discharged to the outside through the outlet of the rainwater utilization equipment 230.

Due to the above-described effects, the rainwater stored in at least the first storage tank 50 can be used in the rainwater utilization equipment 230, and the rainwater utilization equipment 230 can utilize the rainwater.

(Construction method of storage system)
Next, a construction method for the storage system 200 will be explained. The construction method of the storage system 200 according to the third embodiment is performed in substantially the same manner as the construction method of the storage system 100 according to the second embodiment. However, the following measures have been taken in the second installation process, the third installation process, and the fourth installation process.

(Construction method of storage system - second installation process)
Next, the second installation step will be explained. In the second installation step, specifically, the water-blocking sheet 210 is installed over the side wall portion of the recess 4a and the upper surface of the unevenness adjustment part 42 of the support part 40, and the pumping part 220 is installed on the upper surface of the unevenness adjustment part 42. After that, by vertically stacking and laying a plurality of first storage portions 51 over the entire upper surface of the unevenness adjusting portion 42 (more specifically, the pump 221 is located within the first storage tank 50). (by laying it so that it does), install it.

(Construction method of storage system - 3rd installation process)
Next, the third installation step will be explained. In the third installation process, specifically, the third storage tank 110 is installed so that the lower part of the pumping pipe 222 is located in the second storage tank 60 within the recess 4a formed in the formation process. This is the installation process.

(Construction method of storage system - 4th installation process)
Next, the fourth installation step will be explained. In the fourth installation step, specifically, the second storage tank 60 is installed so that the upper part of the pumping pipe 222 is located in the third storage tank 110 in the recess 4a formed in the formation step. This is the process of In addition, in Embodiment 3, after the fourth installation process, the pumping pipe 222 and the rainwater utilization equipment 230 are connected by a fixture or the like.

With the construction method described above, the storage system 200 can be constructed without using any special method, and the workability of the storage system 200 can be improved.

(Effects of Embodiment 3)
As described above, according to the third embodiment, the water-blocking sheet 210 provided so as to cover the periphery of the first storage tank 50, and the pumping means for pumping at least the rainwater stored in the first storage tank 50 to a predetermined position. , the rainwater stored in at least the first storage tank 50 can be pumped up to a predetermined position, and the rainwater can be utilized at the predetermined position.

[III] Modifications to the Embodiments The embodiments of the present invention have been described above, but the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. , can be modified and improved as desired. Hereinafter, such a modified example will be explained.

(About the problems to be solved and the effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-mentioned contents, and the present invention can solve problems not described above or achieve effects not described above. In addition, it may solve only a part of the described problem or produce only a part of the described effect.

(About shape, numbers, structure, time series)
With respect to the components illustrated in the embodiments and drawings, the shape, numerical values, structure or chronological relationship of multiple components may be arbitrarily modified and improved within the scope of the technical idea of the present invention. I can do it.

(About installation location)
In Embodiments 1 to 3 above, it has been explained that the drainage area 2 and the first storage area 3 are included in the area of the ground 1 at the installation location, but the invention is not limited to this. At least one of the storage areas 3 may be omitted.

(About the storage system)
In Embodiments 1 to 3 above, it has been explained that the storage system includes the support part 40, but the invention is not limited to this, and for example, the permeable layer 4c of the second storage area 4 has a desired supporting force. In such a case, the support portion 40 may be omitted. In this case, the first installation step can be omitted in the storage system construction methods according to the first to third embodiments.

In Embodiments 1 to 3 above, it has been explained that the storage system is installed in the second storage area 4; however, the storage system is not limited to this, and for example, an area other than the second storage area 4 (for example, 3) may be installed. In addition, when installing in the 1st storage area 3, in the construction method of the storage system based on the said Embodiment 1-3, you may omit a planting process.

(About the support part)
In Embodiments 1 to 3 above, it has been explained that the support section 40 includes the support layer 41 and the unevenness adjustment section 42, but the present invention is not limited to this, and for example, either the support layer 41 or the unevenness adjustment section 42 or one may be omitted.

(About the first storage tank)
In the first to third embodiments described above, the first storage section 51 of the first storage tank 50 has a higher storage capacity than the second storage section 61, and the generally cage-shaped resin block bodies 52 are interconnectable. Although it has been described that the storage portion is formed by horizontally arranging the storage portions, the storage portion is not limited thereto. For example, the storage section may be formed by horizontally arranging cage-shaped resin block bodies 52 having a storage capacity lower than or substantially the same as that of the second storage section 61. Alternatively, the storage portion may be formed by horizontally arranging substantially cage-shaped resin block bodies 52 or non-cage-shaped resin block bodies 52 that cannot be connected to each other.

(About the second storage tank)
In the first to third embodiments described above, it has been explained that the second storage section 61 of the second storage tank 60 includes the lower layer 62, the intermediate layer 63, and the upper layer 64, but the present invention is not limited to this, and for example, Any one or any two of the lower layer 62, the intermediate layer 63, and the upper layer 64 may be omitted. Alternatively, in addition to the lower layer 62, the intermediate layer 63, and the upper layer 64, a holding portion may be provided.

Here, the "holding section" is a holding means for holding the lower layer 62, the intermediate layer 63, and the upper layer 64, and is, for example, a cage-like body made of a metal mesh material. It is provided so as to substantially cover the entire surfaces of the intermediate layer 63 and the upper layer 64. Thereby, the states of the lower layer 62, middle layer 63, and upper layer 64 can be maintained, and the durability of the second storage tank 60 can be improved.

Further, in the first to third embodiments described above, the second storage tank 60 has a permeability lower than that of the first storage tank 50, and has a permeability lower than the permeability of the permeable layer 4c. Although it has been explained that it is configured as follows, it is not limited to this. For example, it may be configured to have a permeability lower than that of the first storage tank 50 and a permeability higher than or substantially the same as that of the permeable layer 4c.

Further, in the first to third embodiments described above, it has been explained that the plants P are planted in the second storage tank 60, but the present invention is not limited to this. FIG. 5 is a diagram showing a modification of the storage system 100 according to the second embodiment, and is a diagram showing a region corresponding to FIG. 2. In FIG. For example, as shown in FIG. 5, a groove 120 capable of storing rainwater on the ground surface of the second storage tank 60 (specifically, a groove 120 whose bottom portion is located above the lower end of the second storage tank 60, etc.) ) may increase the storage amount of the storage system 100.

(About the third storage tank)
In the second embodiment, the third storage section 111 of the third storage tank 110 is a storage section formed by horizontally arranging a plurality of resin block bodies 52 and filled with sand 113. However, it is not limited to this. FIG. 6 is a diagram showing a modification of the storage system 100 according to the second embodiment, and is a diagram showing an area corresponding to FIG. 2. In FIG. For example, as shown in FIG. 6, the plurality of resin block bodies 52 may be omitted, and the storage portion may be made of only sand 113.

(About water-blocking sheets and pumping parts)
In the third embodiment, it has been described that the pump 221 is buried in the first storage tank 50, but the present invention is not limited thereto. For example, it may be buried in the second storage tank 60 or the third storage tank 110. In this case, the pump 221 is buried only in the second storage tank 60 or across the second storage tank 60 and the third storage tank 110. Alternatively, it may be buried in each of the first storage tank 50 and the second storage tank 60 (or the third storage tank 110), or in the first storage tank 50, the second storage tank 60, and the third storage tank 110. It may be buried in each.

Furthermore, although it has been explained that the storage system 200 according to the third embodiment includes the water-blocking sheet 210 and the pumping section 220, the storage system 200 according to the above-mentioned embodiment 1 or 2 is not limited to this. , a water-blocking sheet 210 and a pumping part 220 may be provided in the first storage tank 50. In this case, the water-permeable sheet 53 provided in the first storage tank 50 can be omitted.

(Additional note)
The storage system in Appendix 1 is a storage system for storing rainwater, and includes a first storage tank buried underground and a second storage tank provided between the ground surface and the first storage tank. a second storage tank having a permeability lower than the permeability of the first storage tank.

The storage system according to Supplementary Note 2 is the storage system according to Supplementary Note 1, in which the first storage tank has at least one first storage section formed by arranging a plurality of resin blocks horizontally in parallel, stacked vertically. It is formed by

The storage system according to appendix 3 is the storage system according to appendix 1 or 2, in which the second storage tank has at least one second storage section made of sand, gravel, gravel, crushed stone, or soil stacked in the vertical direction. It is formed by

The storage system of Supplementary Note 4 is a third storage tank provided between the first storage tank and the second storage tank in the storage system according to any one of Supplementary Notes 1 to 3, A third storage tank is provided which has a different configuration from the first storage tank and the second storage tank and has substantially the same permeability as the second storage tank.

The storage system according to Appendix 5 is the storage system according to Appendix 4, in which the third storage tank is formed by horizontally arranging a plurality of resin blocks, and the third storage section filled with sand is arranged vertically. It is formed by laminating at least one or more layers in the direction.

The storage system of Supplementary Note 6 is the storage system according to any one of Supplementary Notes 1 to 5, including a water-blocking sheet provided to cover the periphery of the first storage tank, and at least a water-blocking sheet provided to cover the periphery of the first storage tank. and pumping means for pumping up the rainwater to a predetermined position.

(Effect of appendix)
According to the storage system described in Supplementary Note 1, the first storage tank is buried underground, and the second storage tank is provided between the ground surface and the first storage tank, and the first storage tank is and a second storage tank having a permeability lower than that of the first storage tank. It takes time to pass water through the tank. Therefore, in the area where the storage system is installed, the effective period of peak cuts during times of heavy rain, etc. can be sustained, and the storage performance of the storage system can be easily maintained.

According to the storage system described in Supplementary note 2, the first storage tank is formed by vertically stacking at least one first storage section formed by horizontally arranging a plurality of resin blocks. Therefore, the first storage tank can have relatively high permeability and durability, and the usability and installability of the first storage tank can be improved.

According to the storage system described in Appendix 3, the second storage tank is formed by vertically stacking at least one second storage section made of sand, gravel, gravel, crushed stone, or soil. , the second storage tank can have relatively high purification performance and a design that easily adapts to the installation environment, and the usability and installability of the second storage tank can be improved.

According to the storage system described in Appendix 4, the third storage tank is provided between the first storage tank and the second storage tank, and has a different configuration from the first storage tank and the second storage tank. Since the system is equipped with a third storage tank that has approximately the same permeability as the second storage tank, the area where the storage system is installed is more stable during heavy rains, etc. than when the third storage tank is not provided. The effect period of the peak cut can be sustained, making it easier to maintain the function of the storage system.

According to the storage system described in Supplementary note 5, the third storage tank is formed by horizontally arranging a plurality of resin blocks, and at least one third storage part filled with sand is arranged vertically. Since it is formed by laminating, the third storage tank can have relatively high purification performance and durability, and the usability and installation ease of the third storage tank can be improved.

According to the storage system described in Supplementary Note 6, the system includes a water-blocking sheet provided to cover the periphery of the first storage tank, and a pumping means for pumping up at least the rainwater stored in the first storage tank to a predetermined position. Therefore, the rainwater stored in at least the first storage tank can be pumped up to a predetermined position, and the rainwater can be utilized at the predetermined position.

1 Ground 2 Drainage area 3 First storage area 4 Second storage area 4a Recess 4b Impermeable layer 4c Permeable layer 10 Drainage equipment 11 Drainage channel 12 Drainage basin 20 Storage equipment 30 Storage system 40 Support part 41 Support layer 42 Landlessness adjustment part 50 First storage tank 51 First storage part 52 Resin block body 53 Permeable sheet 60 Second storage tank 61 Second storage part 62 Lower layer 63 Middle layer 64 Upper layer 100 Storage system 110 Third storage tank 111 Third storage part 112 Resin block body 113 Sand 120 Groove 200 Storage system 210 Water-blocking sheet 211 Water-blocking layer 212 Protective layer 220 Pumping section 221 Pumping pump 222 Pumping piping 230 Rainwater utilization equipment P Plant

Claims (4)

A storage system for storing rainwater,
a first storage tank buried underground;
a second storage tank provided between the ground surface and the first storage tank, the second storage tank having a permeability lower than the permeability of the first storage tank;
a third storage tank provided between the first storage tank and the second storage tank, the third storage tank having a different configuration from the first storage tank and the second storage tank; a third storage tank having substantially the same permeability as the tank;
The third storage tank is formed by horizontally arranging a plurality of resin blocks and stacking at least one third storage part filled with sand in the vertical direction.
storage system. The first storage tank is formed by vertically stacking at least one first storage section formed by horizontally arranging a plurality of resin block bodies.
A storage system according to claim 1. The second storage tank is formed by stacking at least one second storage part made of sand, gravel, gravel, crushed stone, or soil in the vertical direction.
The storage system according to claim 1 or 2. a water-blocking sheet provided to cover the periphery of the first storage tank;
pumping means for pumping up the rainwater stored in at least the first storage tank to a predetermined position;
A storage system according to any one of claims 1 to 3.

Images