JPH0941470A - Rainwater storage infiltrating tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make effective use of a ground part, store rainwater, infiltrating from the ground, as water for fire prevention or the like and infiltrate rainwater, exceeding the capacity, under the ground. SOLUTION: A recessed part space 1 for a tank is excavated, and crushed stones 3 are arranged along a bottom part 2a, a lower slant face 2b, a step part 2c and an upper slant face 2d. A rubber sheet 4 is laid to cover from the bottom part 2a to the intermediate part of the step part 2c, and the inside is made a rainwater storage tank part 1a, while a part to an upper intermediate part is made a rainwater infiltrating tank part 1b. Inside the rainwater storage tank part 1a and rainwater infiltrating tank 1b, a large number of cage-like members 5 are connected to constitute a space holding skeleton, and crushed stones 3 are further laid on and around the skeleton 3 to backfill. A pipe body 8 is erected from the rainwater storage tank part 1a, and a pumping device 9 is connected to the upper end of the pipe body 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage and permeation tank for storing and storing rainwater for use for purposes other than drinking, such as for fire prevention and water sprinkling. The present invention relates to a rainwater storage and infiltration tank that can gradually infiltrate underground rainwater exceeding a certain capacity.

[0002]

2. Description of the Related Art As a fire-prevention tank for storing fire-prevention water, those made of concrete or the like installed on the ground or underground are known. Some of these store tap water and store rainwater. Wooden tanks used in the same way are also known, but these are limited to small ones.

Some of these fire protection tanks store rainwater, and some are installed above ground, and some are installed underground, so that space can be effectively used for some reason. Was introduced in and when it was full,
Of course, if further introduction is not possible, the introduction part is not closed, and if the introduction is to continue in case of rain, the rainwater overflows and flows out to a low place. Becomes

[0004]

In the present invention, the above-ground portion can be used as a park, a playground, a plaza of public / private facilities, a garden, or a planting portion thereof, and at the same time, it can be used underground. To provide a rainwater storage and infiltration tank that can store and store rainwater that infiltrates from above ground as fire prevention water and other uses other than drinking, and can gradually infiltrate underground rainwater that exceeds its capacity. Is a problem to be solved.

[0005]

[Means for Solving the Problems] One of the present inventions is
A recessed space for a tank having an open top is formed, and a water-impermeable lining layer is formed between the bottom of the recessed space for a tank and the middle of the circumferential side. The space holding skeleton is formed by filling a plurality of unit skeleton members into the space inside the upholstery layer and in the space halfway above it.
By backfilling the upper part thereof, a rainwater storage tank portion is formed inside the water-impermeable lining layer, and a rainwater infiltration tank portion is formed above the tank recessed space. It is a rainwater storage and infiltration tank equipped with a pumping means for pumping the water collected in the rainwater storage tank part to the ground.

[0006] The size of the tank recess space is determined in consideration of the necessity of a region for using it as fire protection water. Further, the region in which the tank recess space is dug down does not have to be a specific place. It is not inconvenient in any place such as a private home's garden, park, field, playground, etc. It is not inconvenient even in the area where the ground is filled up and slightly raised. The water-impermeable lining layer is not particularly limited as long as it does not allow rainwater to permeate and can be stored inside. It may be constructed by pouring concrete, or may be constructed by using a metal plate or the like. The unit skeleton member can be a space holding skeleton that can store rainwater inside or can temporarily store rainwater by simply filling a plurality of unit skeleton members or by filling them while connecting them by some means. There is no particular limitation as long as the space retaining skeleton can withstand the pressure of backfilled earth and sand, planted plants, a person running and walking on them, and the like. In some cases, a small piece member such as gravel can be used. In this case, whatever the internal shape of the tank recess space is, it is possible to deal with it freely, and since it can be configured by simply inserting a required amount into a predetermined portion, it is extremely easy and inexpensive to construct. I will get it.

Further, the pumping means may collect water stored in the rainwater storage tank portion inside the impermeable lining layer,
It is not limited to a specific one as long as it can be pumped to the above-ground part as needed for fire prevention. Manual or electric pump means can be adopted, but in order to actually work effectively such as fire protection, it is appropriate to use an electric pump or other prime mover pump having an appropriate capacity. . Considering the response to loss of power or fuel in the event of a disaster, it would be appropriate to install manual pumping means.

Therefore, according to the first aspect of the present invention, only the pumping means is exposed to the ground portion, and the space holding skeleton constituted by a plurality of unit skeleton members can secure the required pressure resistance in the tank recess space. Since it is a thing, the above-ground part can be used freely in a park, a playground or the like.

Further, since the upper part of the recessed space for a tank in which the space-holding skeleton is formed is only backfilled and not hardened with concrete or the like, rainwater permeates from the ground through the backfilled soil or the like. The water level gradually flows down to the tank recess space, and the water level rises from the rainwater storage tank portion to the rainwater infiltration tank portion. Since there is no water impermeable lining layer around the rainwater infiltration tank part, when the water level rises up to this point, the rainwater gradually infiltrates underground from the surroundings, and the rainwater storage tank part Rainwater that exceeds the capacity of the above does not overflow to the ground and becomes groundwater, which can contribute to the development of groundwater.

Further, according to the first aspect of the present invention, the pumping means for pumping up the rainwater stored in the rainwater storage tank portion is constructed, so that when a fire occurs in the vicinity thereof,
This can be pumped up and used for extinguishing fires. In addition, when a park or playground is constructed on the aboveground part of this rainwater storage and infiltration tank, it is used for watering plants planted in them, or for spraying on a dry playground in summer. It can also be used for. It can be used freely for purposes other than drinking. Further, in the first aspect of the present invention,
Since the above-ground portion can be used freely, it has an advantage that rainwater can be stored and stored while effectively utilizing the space.

According to a second aspect of the present invention, the non-water-permeable lining layer according to the first aspect of the present invention is constructed by lining a rubber sheet from the bottom of the recessed space for a tank to the middle of the circumferential side. Is. The rubber sheet may be directly placed in a contact state from the bottom of the tank recess space to the midway of the circumferential side, but it may be placed in the bottom part of the tank recess space and all parts on the circumferential side. It is also possible to dispose gravel or crushed stone, etc., and then dispose at the position through these gravel or the like.

Therefore, according to the second aspect of the present invention, the water-impermeable lining layer is constructed by lining the rubber sheet from the bottom of the tank recess space to the middle of the circumferential side. Since the structure is extremely simple and flexible, problems such as easy breakage due to an earthquake or the like do not occur.

According to a third aspect of the present invention, a basket-shaped member is formed as the unit skeletal member of the first aspect of the present invention, and a space within the recessed portion space for the tank, inside the water-impermeable lining layer, and halfway above it. A plurality of the basket-shaped members are stacked inside each other in the vertical direction and the vertical and horizontal directions to form a space holding skeleton.

Therefore, according to the third aspect of the present invention, it is possible to easily construct a space holding skeleton having a shape corresponding to any shape of the tank recess space.
Moreover, a sufficiently large capacity rainwater storage space can be left in the tank recess space.

According to a fourth aspect of the present invention, a quadrilateral frame is used as the unit skeleton member of the first aspect of the present invention, and inside the recessed space for a tank, inside the water-impermeable lining layer and halfway above it. In the space, a plurality of the quadrilateral frame bodies are connected in the vertical direction and the vertical and horizontal directions to form a space holding skeleton.

Therefore, according to the fourth aspect of the present invention, when the size of the quadrilateral frame is set to be relatively small, whatever shape the tank recess space has, the shape can be easily accommodated. A space-maintaining skeleton of shape can be constructed. Further, when the size of the quadrilateral frame is relatively large, it is possible to easily configure the space holding skeleton that fills the large-capacity tank recess space. Moreover, in any case, a sufficiently large capacity rainwater storage space can be left in the tank recess space.

[0017]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 3 show one embodiment of 1, 2 and 3 of the present invention. FIG.
2 is a schematic cross-sectional explanatory view showing an embodiment, FIG. 2 is a plan explanatory view showing a state in which cage-shaped members that are unit skeletal members are combined, and FIG. 3 is a partial cutout of cage-shaped members that are unit skeletal members. It is a front view.

First, the ground of a desired area such as a park, a playground, or a garden of another facility is dug down, and here, rainwater having a capacity sufficient to store sufficient water for fire protection required in case of a fire near the facility. A tank recess space 1 that can include a storage tank portion 1a is configured. Although FIG. 1 shows a state in which the upper part has already been covered with earth and sand and backfilled, it goes without saying that the upper part is dug down to the state where the upper part is completely opened. Thus, here, the lower slope 2b that spreads upward from the bottom 2a of the quadrangle when viewed from above is raised,
The stepped portion 2c that horizontally spreads outward is formed on the way to the ground surface GL, and the upper slope 2d that extends upward from the outer edge of the stepped portion 2c to the ground surface GL is dug down.

Next, the bottom portion 2 of this tank recess space 1
a, the lower slope 2b, the step 2c, and the upper slope 2d, the crushed stones 3 are arranged, and the bottom 2 is provided through the layers of the crushed stones 3.
a, the water impermeable rubber sheet 4 is covered on the lower slope 2b and halfway on the step 2c. Thus, the rainwater storage tank portion 1a is located below the step portion 2c in the tank recess space 1, and the rainwater infiltration tank portion 1b is located above the step portion 2c. After this, a plurality of basket-shaped members 5, which are unit skeleton members,
Bring 5 ... from above into this tank recess space 1,
As shown in FIG. 1 and FIG. 2, they are connected to each other to create a structure of the space-retaining skeleton therein.

As shown in FIG. 3, the cage member 5 has a collar body 5a extending from the upper edge of the cage-shaped body portion, and the outer periphery of the collar body 5a extends from the outer periphery of the body portion. The skirt portion 5b is configured to hang down in parallel. Further, water-permeable holes 6, 6 ... Are also opened in the collar body 5a and the skirt portion 5b,
When a plurality of them are assembled to form a space holding skeleton, rainwater can flow through the tank recess space 1 held by the space holding skeleton through these water permeable holes 6, 6. Further, the collar body 5a and the skirt portion 5b
As shown in FIG. 3, bolt holes 7, 7 ... Although not shown, bolt holes are formed in the bottoms of the container portions of the basket-shaped members 5, 5, ....

However, as shown in FIG. 1, the above-mentioned space holding skeleton has the entire portion corresponding to the bottom portion 2a on the rubber sheet 4 arranged on the bottom portion 2a of the tank recess space 1 through the crushed stone 3. By laying the basket-shaped members 5, 5 ... downward over the entire area and connecting the laterally adjacent skirts 5b, 5b formed at the outer end of the collar body 5a to each other,
Configure. On top of these downward facing basket-shaped members 5, 5 ..., the upward facing basket-shaped members 5, 5 ... Are fixed with adhesives at their bottoms if necessary, or joined by bolts / nuts or the like. Fix it. Or just post it. The cage-shaped members 5 and 5 that are adjacent to each other laterally are coupled to each other by using the skirt portions 5b and 5b formed in the collar body 5a, when the cage-shaped members 5 and 5 at the bottom are coupled to each other. It is the same. Further, the downward basket-like members 5, 5 are placed on the upwardly arranged basket-like members 5, 5 ..., and the basket-like members 5 and 5 facing each other are face-to-face joined to the collar body 5.
a and 5a are used to bond and fix each other. The cage-shaped members 5 and 5 that are adjacent to each other on the side are provided with a skirt portion 5 at the outer end of the collar body 5a.
It goes without saying that they are connected using b and 5b.

In this way, the basket-shaped members 5, 5, ... Until the internal space of the tank recessed space 1 is filled, except for a certain depth from the ground surface GL for backfilling.
The space-maintaining skeleton is formed by stacking and bonding together.

The cage members 5, 5 ... As shown in FIGS. 1 and 2, the upper and lower cage members 5, 5 are connected to each other when their openings are face-to-face joined to each other. , The bolt holes 7, 7 of the collar bodies 5a, 5a of each other are combined and fixed with bolts and nuts, etc., and when the bottom portions are face-to-face joined, they may be joined with an adhesive or bolts as necessary. -Join with nuts, or simply put it above it below. The left and right cage-shaped members 5, 5 are connected to each other by facing the skirt portions 5b, 5b hanging from the outer ends of the collar bodies 5a, 5a and facing the bolt holes 7, 7 ... Use it to connect and fix with bolts and nuts.

After the structure of the space holding skeleton is completed in this way, as shown in FIG. 1, each of the space holding skeleton, the rubber sheet 4, the stepped portion 2c of the tank recess space 1 and the upper slope 2d. The crushed stone 3 is filled or placed on the gap and the upper part of the space holding skeleton. Next, the earth and sand etc. at the time of digging are backfilled on the layer of the crushed stones 3 arranged evenly on the above space holding skeleton. Furthermore, depending on the needs of the area, trees 1
Plant 1st grade.

By the way, in the above assembling process of the space-maintaining skeleton, if necessary, holes are made in the bottom portions of the cage-shaped members 5, 5, ... The pipe body 8 is set upright. The lower end opening is near the position directly above the rubber sheet 4 at a position corresponding to the bottom of the rainwater storage tank 1a, and the upper end is at a height slightly elevated from the ground surface GL. This pipe body 8
The suction port of the pump device 9 is attached to the upper end of the, and a short pipe body is also attached to the discharge port. A cap 10 is detachably covered on the upper pipe body. Thus, the pumping device is constructed.

As described above, in this rainwater storage / infiltration tank, the recessed space 1 for the tank is dug down, the rubber sheet 4 is internally provided at a predetermined position inside the recessed space 1 through the layer of crushed stones 3, and the rubber sheet 4 is provided. Basket-shaped members 5, 5 ... to the inside and above
Are assembled to form a space holding skeleton, and crushed stones 3 are arranged around the space holding skeleton and above the space holding skeleton and backfilled. Further, a hole is made in the cage-shaped members 5, 5, ... Which are unit skeletal members constituting the space-retaining skeleton, the pipe body 8 is erected inside the pipe-shaped member 8, and the pump device 9 is arranged therein to form a pumping device. It was done. Therefore, the rainwater storage and infiltration tank can be configured easily and easily. Further, there is an advantage that the size and the shape can be freely configured.

Therefore, according to this embodiment, only the pumping device is exposed to the ground, and the tank holding space 1 is required by the space holding skeleton constituted by the plurality of basket-shaped members 5, 5, .... Since the pressure resistance can be ensured, the above-ground park, playground or garden of another facility can be used safely and freely.

Further, since the upper part of the tank recessed space 1 in which the space holding skeleton is constructed is only backfilled and not hardened with concrete or the like, rainwater permeates through the earth and sand backfilled from the ground. Then, it gradually flows down into the tank recess space 1, and the water level rises from the rainwater storage tank portion 1a to the rainwater infiltration tank portion 1b.
Since the rubber sheet 4 is not arranged around the rainwater infiltration tank portion 1b, when the water level rises up to this point, the rainwater gradually infiltrates underground from the surroundings, and the rainwater storage tank portion 1a. Rainwater that exceeds the capacity of the above will be groundwater without overflowing to the ground, and can contribute to the development of groundwater.

Further, in this embodiment, since the pumping device for pumping up the rainwater stored in the rainwater storage tank portion 1a is constructed, the cap 10 is detached when a fire occurs around the pumping device. By connecting a hose or the like to the pipe body arranged on the discharge side of the pump device 9, the rainwater in the rainwater storage tank portion 1a can be pumped up and used for extinguishing the fire. In addition, it can be used for water supply for plants above the rainwater storage and infiltration tank, or can be freely used for purposes other than drinking. As described above, since the above-ground portion can be used freely, there is an advantage that rainwater can be stored and stored while effectively utilizing the space.

Further, in this embodiment, since the rubber sheet 4 constitutes the water impermeable lining layer of the rainwater storage tank portion 1a, a large vibration or rocking at the time of an earthquake or the like, and a slight displacement of the ground. Even if such a phenomenon occurs, it is not easily destroyed and can sufficiently fulfill the role of a tank until then.

FIGS. 4 and 5 show another embodiment, and FIG. 4 is a front view showing a quadrilateral frame body along the sides of the quadrilateral for constructing the space retaining skeleton. 5 is a schematic perspective view showing a structure of a space holding skeleton assembled by using a plurality of the quadrilateral frame bodies.

This embodiment is different from the embodiment shown in FIGS. 1 to 3 in that the cage frames 5, 5 ... Is used to construct the space-holding skeleton. In this way, it is possible to further increase the space ratio as compared with the case of the above embodiment.

As shown in FIG. 4, the quadrilateral frame body 12 is constructed by assembling rods into a shape along the sides of the quadrilateral, and the recessed space 1 for a tank constructed as described above. In the same manner as in the above-described embodiment, a plurality of them are brought into the space, and the space holding skeleton 13 is constructed by assembling them above the inside of the water-impermeable rubber sheet 4. This space retention skeleton 1
3, the quadrangular frame bodies 12 and 12 which are adjacent to each other are overlapped with each other and simultaneously clamped by a clamping means,
The structure is assembled as shown in FIG.

In the case of the space holding skeleton 13, a water-permeable mesh sheet is placed on the skeleton 3, and then the crushed stones 3 and the like are arranged and backfilled. In this way, a rainwater storage and infiltration tank similar to that of the above embodiment can be constructed.

The rainwater storage and infiltration tank thus constructed has an advantage that the space ratio is higher than that in the case where the space holding skeleton 13 is formed by using the cage members 5, 5, ... Of the above-mentioned embodiment. In other respects, the same operational effects as those described in the above embodiment are obtained.

[0036]

According to the present invention, therefore, only the pumping means is exposed to the ground portion, and the space holding skeleton constituted by a plurality of unit skeleton members can secure the necessary pressure resistance in the tank recess space. Since it is a thing, the above-ground part can be used freely in a park, a playground or the like.

Further, since the upper part of the tank recess space in which the space holding skeleton is configured is only backfilled and not hardened with concrete or the like, rainwater permeates through the backfilled soil from the ground. The water level gradually flows down to the tank recess space, and the water level rises from the rainwater storage tank section to the rainwater infiltration tank section. Since there is no water impermeable lining layer around the rainwater infiltration tank part, when the water level rises up to this point, the rainwater gradually infiltrates underground from the surroundings, and the rainwater storage tank Rainwater that exceeds the capacity of the section does not overflow to the ground and becomes groundwater, which can contribute to the development of groundwater.

In the present invention, since the pumping means for pumping the rainwater stored in the rainwater storage tank portion is constructed, when a fire occurs in the vicinity thereof, the pumping means is used for extinguishing the fire. Can be offered. Besides that,
If a park or playground is constructed on the aboveground part of this rainwater storage and infiltration tank, it will be used for watering plants planted in them or for watering dry playgrounds in summer. You can also It can be used freely for purposes other than drinking. Further, in the present invention, since the above-ground portion can be used freely, there is an advantage that rainwater can be stored and stored while effectively utilizing the space.

Further, in the present invention, when the water-impermeable lining layer is constructed by lining a rubber sheet from the bottom of the tank recess space to the middle of the circumferential side, the construction is extremely high. Since it is simple and flexible, problems such as easy breakage due to an earthquake or the like do not occur.

Further, a basket-like member is constituted as a unit skeleton member, and a plurality of the basket-like members are provided in the tank recess space, inside the water-impermeable lining layer, and in the space halfway above. When the space retaining skeleton is configured by stacking in the vertical direction and the vertical and horizontal directions, the space retaining skeleton can be easily configured regardless of the shape of the tank recess space. Moreover, a sufficiently large capacity rainwater storage space can be left in the tank recess space.

Furthermore, a quadrilateral frame is used as a unit skeleton member, and a plurality of quadrilaterals are provided in the tank recess space, inside the water-impermeable lining layer and in the space halfway above. When the frame body is connected in the vertical direction and the vertical and horizontal directions to form the space holding skeleton, the following effects are obtained. For example, when the size of the quadrilateral frame is made relatively small, whatever the shape of the tank recess space, it is easy to construct a space holding skeleton with a shape corresponding to that. You can Further, for example, when the size of the quadrilateral frame is relatively large, it is possible to easily configure the space holding skeleton that fills the large-capacity tank recess space. Moreover, in any case, a sufficiently large capacity rainwater storage space can be left in the tank recess space.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional explanatory view showing an embodiment.

FIG. 2 is an explanatory plan view showing a state in which cage-shaped members that are unit skeletal members of one embodiment are combined.

FIG. 3 is a partially cutaway front view of a basket-shaped member that is a unit skeletal member of one embodiment.

FIG. 4 is a front view showing a quadrilateral frame along the sides of a quadrilateral for the construction of a space-maintaining skeleton of another embodiment.

FIG. 5 is a schematic perspective view showing a structure of a space holding skeleton assembled by using a plurality of the quadrilateral frame bodies of another embodiment.

[Explanation of symbols]

 1 Tank recessed space 1a Rainwater storage tank portion 1b Rainwater infiltration tank portion 2a Bottom portion 2b Lower slope 2c Step portion 2d Upper slope 3 Crushed stone 4 Rubber sheet 5 Basket member 5a Collar body 5b Skirt portion 6 Water penetration hole 7 Bolt hole 8 Pipe Body 9 Pump device 10 Cap 11 Tree 12 Quadrilateral frame body 13 Space retention skeleton

Claims (4)

[Claims] 1. A recessed space for a tank having an open upper portion is formed in the ground, and a water-impermeable lining layer is formed from the bottom of the recessed space for a tank to a midpoint on the circumferential side, and the recess for the tank is formed. In the space, the space holding skeleton is formed by filling a plurality of unit skeleton members into the space inside the water-impermeable lining layer and in the space halfway above the water-permeable lining layer, and by backfilling the upper part thereof,
In the tank recessed space, a rainwater storage tank portion is formed inside the water-impermeable lining layer, and a rainwater infiltration tank portion is formed above it, and water collected in the rainwater storage tank portion is further formed. A rainwater storage and infiltration tank equipped with a pumping means for pumping to the ground. 2. The rainwater storage and permeation tank according to claim 1, wherein the water-impermeable lining layer is formed by lining a rubber sheet from the bottom of the tank recess space to a midway point on the circumferential side. 3. A basket-shaped member is configured as the unit skeletal member, and a plurality of the basket-shaped members are provided in the tank recess space, inside the water-impermeable lining layer, and in a space halfway above. The rainwater storage and permeation tank according to claim 1, wherein the space retaining skeleton is configured by stacking the above and below in a vertical and horizontal direction. 4. A quadrilateral frame is used as the unit skeleton member, and a plurality of the four sides are provided inside the tank recess space and in a space halfway up and above the water impermeable lining layer. The rainwater storage and permeation tank according to claim 1, wherein the space holding skeleton is configured by connecting the frame bodies in the vertical direction and the vertical and horizontal directions.