JP2013079524A - Enclosure used for underground water tank unit and underground water tank unit - Google Patents

Abstract

[PROBLEMS] An underground water storage tank unit and a basement that can reliably prevent water leakage without being affected by the level of proficiency of the person in charge of construction work and do not need to wrap the water storage block group with a water shielding sheet at the construction site. To provide an encapsulant for use in a water tank unit.
An encapsulant used in an underground water tank unit configured by liquid-tightly encapsulating a group of water blocks made of synthetic resin with an encapsulant, wherein the encapsulant is open to the top side. A bag-like carry-in bag capable of carrying the water storage block group into the inside from the opening, and a plurality of bags that are provided at the edge of the opening of the carry-in bag and function as lids for the carry-in bag when folded back A folded portion, and the structure of the carry-in bag of the enveloping body is formed by alternately and repeatedly laminating at least a water shielding sheet for preventing leakage and a protective sheet for preventing breakage of the water shielding sheet, The protective sheet is a multilayer structure positioned on the outermost surface side of the carry-in bag, and a reinforcing plate is further provided on the bottom surface portion of the carry-in bag.
[Selection] Figure 2

Description

  The present invention relates to an underground water tank unit used when rainwater is stored in the ground and used when needed, and an enclosure used for the underground water tank unit.

  Conventionally, an underground water storage structure has been known in which rainwater is stored in an underground water tank buried underground, and the rainwater stored in the underground water tank is pumped up and used when necessary. .

  For example, as shown in FIG. 12, the underground water storage structure 100 disclosed in Patent Document 1 collects underground water storage tanks 102 buried in the ground and rainwater that has fallen on the roof of the house 104 or the ground surface. It has a structure provided with water collecting means 106 that leads into the tank 102 and water intake means 108 such as a pump for taking out rainwater stored in the underground water storage tank 102.

  The underground water storage structure 100 is generally buried in a relatively large facility site such as a park or a commercial facility for the purpose of securing water in an emergency disaster such as an earthquake or tsunami. It is estimated that this trend will increase further in the future due to the increase in individual preparations for emergency disasters.

  By the way, in such an underground water storage structure 100, first, a buried hole for forming the underground water storage tank 102 is dug in the construction site, and a sheet-shaped impermeable sheet 110 for the purpose of preventing water leakage is disposed here. To do.

  Then, a plurality of synthetic resin water storage block groups 112 are placed on the water impervious sheet 110 disposed in the buried hole, and then the periphery of the water impervious sheet 110 is raised to block the periphery of the water storage block group 112. The underground water storage tank 102 is formed by being surrounded by the water sheet 110 and enclosing the water blocking block 110 on the upper surface of the water storage block group 112.

  In addition, since the water-impervious sheet 110 has a long roll shape with a width of about 2 m, the water-impervious sheet 110 and the water-impervious sheet 110 are arranged in a row so that the end portions of the water-impervious sheet 110 overlap each other with respect to the embedded hole. The large water-impervious sheet 110 that fits the buried hole is constructed each time by bonding or welding the overlapped portion with the sheet 110 at the construction site.

JP 2000-309958 A

  However, since the person in charge of the construction of the overlapped portion of the water-impervious sheet 110 and the water-impervious sheet 110 is performed at each construction site, the adhesion or welding is not sufficient depending on the level of proficiency of the person in charge of the construction. Could occur.

  For this reason, a sufficient leak check of the water shielding sheet 110 has been performed before the underground water storage tank 102 is buried, but if the rainwater is not actually stored in the underground water storage tank 102, the water leakage will surely occur. The current situation is that it is not possible to determine whether or not this has been prevented.

  In view of such a current situation, the present invention can surely prevent water leakage without being affected by the level of proficiency of the person in charge of construction, and needs to undergo a work of wrapping the water storage block group with a water shielding sheet at the construction site. It is an object of the present invention to provide an enclosure used for an underground water storage tank unit and an underground water storage tank unit.

The present invention was invented in order to achieve the problems and objects in the prior art as described above,
The enveloping body used for the underground water tank unit of the present invention is:
An enveloping body used for an underground water tank unit configured by liquid-tightly encapsulating a synthetic resin water storage block group with an enveloping body,
The encapsulation is
A bag-like carrying bag that has an opening on the top side and can carry the water storage block group into the inside from the opening;
A plurality of folded portions provided at the edge of the opening of the carry-in bag and functioning as lids of the carry-in bag when folded;
With
The structure of the carry-in bag of the enveloping body is formed by alternately and repeatedly laminating at least a water-proof sheet for preventing water leakage and a protective sheet for preventing breakage of the water-proof sheet, and the protective sheet is formed on the carry-in bag. Multi-layer structure located on the outermost surface side,
The bottom portion of the carry-in bag is further provided with a reinforcing plate.

  In this way, if the enveloping body is configured in a bag shape, an underground water storage tank unit is created by carrying a water storage block group into the bag-shaped enveloping body in advance, and this underground water storage tank unit is installed at the construction site. Since it is only necessary to embed in the burial hole, the construction procedure can be simplified and the construction period can be shortened.

  In addition, since it is not necessary to bond or weld a water shielding sheet in a buried hole as in the prior art, an underground water storage tank unit that does not cause water leakage reliably without being affected by the level of proficiency of construction personnel is provided. Can do.

  Further, since the reinforcing plate is provided on the bottom surface portion of the encasement bag, the envelopment body can also be lifted when the underground water tank unit in the state where the water storage block group is carried into the encapsulant is lifted during construction. The underground water storage tank unit can be carried into the buried hole in a state of being surely unitized without causing the internal water storage block group to fluctuate or fluctuate.

Moreover, the envelope used for the underground water tank unit of the present invention is:
The reinforcing plate is
It is provided between the water shielding sheet and the protective sheet.

  If the reinforcing plate is provided at such a position, the internal water storage can be performed even if the underground water storage tank unit is lifted with the storage block group carried into the enveloping body while serving as a water shielding sheet and a protection sheet. The underground water tank unit can be carried into the buried hole in a unitized state without blockiness of the block group.

Moreover, the envelope used for the underground water tank unit of the present invention is:
The carrying bag of the envelope is
It is configured in a square bag shape.

In this way, if the carry-in bag is a square bag shape, the water storage block group carried into the inside is a square shape, so that the water storage block group can be carried into the carry-in bag exactly.
Therefore, even when the underground water storage tank unit is carried into the burial hole, the surplus portion of the carry-in bag does not interfere with the burial, and the construction work can be performed accurately and reliably.

Moreover, the envelope used for the underground water tank unit of the present invention is:
It further comprises an upside-down bag-shaped weed bag covering the encapsulant from above the encapsulant.

  By providing the grassproof bag in this way, even if the grass roots extend from the ground surface after being buried, the grass roots do not enter the encapsulated body, and the function as the underground water tank unit can be maintained for a long period of time. .

The underground water tank unit of the present invention is
The enclosure used for the underground water storage tank unit described in any one of the above is characterized in that a synthetic resin water storage block group is encapsulated in a liquid-tight manner.

  If it is an underground water tank unit configured in this way, it is only necessary to carry the underground water tank unit manufactured in advance into the burial hole at the construction site and embed it when constructing the underground water tank. It is possible to provide an underground water storage structure that can significantly reduce water leakage and reliably prevent water leakage without being affected by the level of proficiency of construction personnel.

The underground water tank unit of the present invention is
An inflow pipe for allowing rainwater to flow into the underground water storage tank unit is provided on the top side of the enclosure.
If an inflow pipe is provided in this way, rainwater can be reliably taken into the underground water storage tank unit.
Furthermore, the work process at the time of construction of the underground water tank can be reduced, and the construction period can be greatly shortened.

The underground water tank unit of the present invention is
A water intake pipe used for pumping rainwater stored in the underground water storage tank unit is provided on the top side of the enveloping body.

  If the intake pipe is provided in this way, rainwater can be reliably taken out from the underground water tank unit when necessary. Moreover, the work process at the time of construction of an underground water tank can be reduced, and a construction period can be shortened significantly.

  According to the present invention, the enveloping body is configured in a bag shape in advance, and an underground water tank unit can be manufactured at a place other than the construction site. Since it is only necessary to carry and bury it, it can be reliably prevented from leaking without being affected by the level of proficiency of the person in charge of construction, and there is no need to wrap the storage block group with a water shielding sheet at the construction site. The enveloping body used for an underground water tank unit and an underground water tank unit can be provided.

FIG. 1 is a schematic view of an underground water storage structure in which an underground water storage tank unit of the present invention is embedded. FIG. 2 is a perspective view of the underground water tank unit of the present invention. FIG. 3 is a perspective view of an enveloping body used in the underground water tank unit of the present invention. FIG. 4 is a perspective view showing a state in which the water storage block group is carried into the enveloping body of the present invention. FIG. 5 is a perspective view showing a state where the water storage block group is carried into the enveloping body of the present invention and the folded portion is folded. FIG. 6 shows that the water storage block group is carried into the enveloping body of the present invention, the folded portion is folded, the end of the folded portion is bonded or welded, and the water storage block group is liquid-tightly encapsulated with the enveloping body. It is a perspective view which shows a state. FIG. 7 is a cross-sectional view taken along line AA of the underground water tank unit of the present invention shown in FIG. FIG. 8 is an enlarged view of a portion B in FIG. FIG. 9 is an enlarged view of a portion C in FIG. FIG. 10 is a perspective view showing a state in which a grassproof bag is disposed on the underground water storage tank unit of the present invention. FIG. 11 is a perspective view showing a state in which a grassproof bag is covered from above the underground water storage tank unit of the present invention. FIG. 12 is a schematic view of a conventional underground water storage structure.

Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.
The underground water tank unit of the present invention is embedded in the ground, stores rainwater inside, and is used to take out and use the rainwater stored when necessary. The enveloping body is this underground water tank unit. Is used when the water storage block group is encapsulated in a liquid-tight manner.
First, an underground water storage structure including the underground water storage tank unit of the present invention will be described.

<Underground water storage structure 10>
As shown in FIG. 1, the underground water storage structure 10 includes an underground water storage tank unit 20 buried under the ground 70 and rainwater that has fallen on the roof of the house or the ground 70 from an inlet 60 through an inflow pipe 62. A water collecting means 64 for guiding the water into the underground water storage tank unit 20, a water intake means 54 for taking out rainwater stored in the underground water storage tank 102 to the outside by a pump 50 connected via a water intake pipe 52, and an underground water storage tank It has a structure including at least an overflow pipe 66 for allowing rainwater to flow out when the water becomes full.
In such an underground water storage structure 10, an underground water storage tank unit 20 manufactured in advance and unitized outside the construction site is used.

<Underground water tank unit 20>
As shown in FIG. 2, the united underground water storage tank unit 20 of the present invention is formed by encapsulating a synthetic resin water storage block group 22 in a liquid-tight manner inside an enveloping body 26.

  As shown in FIG. 3, the enveloping body 26 has an opening 32 on the top side, a carry-in bag 28 into which the synthetic resin water storage block group 22 can be carried, and an opening 32 of the carry-in bag 28. And a folded-back portion 30 provided at the edge portion.

  Such an enveloping body 26 is preferably configured by processing a sheet into a bag shape from the beginning as shown in FIG. 3, but for example, it is configured by folding a rectangular sheet into a bag shape. (Not shown) may be used and is not particularly limited.

  In addition, the synthetic resin water storage block group 22 carried into the enclosure 26 is formed by appropriately connecting a plurality of water storage blocks 24 according to the size of the construction site. Is embedded in the ground of the ground 70, for example, has a strength capable of withstanding the weight of passenger cars, trucks, etc. applied from the ground 70, and has a desired water storage capacity by an appropriate gap, so that corrosion does not occur Anything can be used. A specific example of such a water storage block group 22 is Pradamun (registered trademark) manufactured by Chichibu Chemical Co., Ltd., for example.

  As shown in FIG. 4, the underground water storage tank unit 20 carries the water storage block group 22 into the inside through the opening 32 of the carry-in bag 28 of the envelope 26 described above, and the edge of the opening 32 as shown in FIG. 5. The folded portion 30 is folded inward, and finally, the overlapped portion of the pushed-back portion 30 is bonded or welded as shown in FIG.

Here, the bonding or welding method is not particularly limited, and for example, a commercially available water-resistant adhesive or a handy type welding machine may be used.
Looking at the longitudinal section of such an underground water storage tank unit 20, it can be seen that the water storage block group 22 is aligned and arranged in the enclosure 26 exactly as shown in FIG.

The size of the encapsulating body 26 and the number of the water storage block groups 22 carried into the interior may be appropriately determined in accordance with the size of the construction site. For example, the length is about 1500 mm × width 3000 mm × height about 1200 mm. An enveloping body 26 having a volume amount is prepared, and 32 water storage blocks 24 each having a length of 750 mm, a width of 750 mm, and a height of 300 mm, and a water storage block group 22 connected to form a rectangular parallelepiped are carried into the enveloping body 26. If this is done, about 5 m ³ of rainwater can be stored. Since such a size is suitable for an individual's house, if it manufactures collectively by this size, a manufacturing cost can be suppressed with shortening of a construction period.

  It should be noted that it is preferable to use a plurality of underground water tank units 20 manufactured in the above-described sizes for individual houses for sites larger than individual houses. Since it is only necessary to bury the plurality of underground water storage tank units 20 side by side, the construction period can be shortened and the cost can be reduced as compared with the conventional construction method. Moreover, if it is such a construction method, even if some underground water tank units 20 are damaged, since the other underground water tank units 20 function normally, the risk by damage can be reduced.

  Moreover, in the underground water storage tank unit 20 of the present invention, as shown in FIG. 8, the structure of the enveloping body 26 includes at least a water shielding sheet 36 for preventing water leakage and a protective sheet for preventing the water shielding sheet 36 from being broken. 34 is formed by alternately and repeatedly stacking the protective sheet 34 on the outermost surface side of the carry-in bag 28.

  The protective sheet 34 is strong enough to prevent breakage of the water-impervious sheet 36, can prevent invasion of earth and sand, water leakage, grass root invasion, is not eroded by bacteria, acids, alkalis, etc. in the soil, and is a sheet Any component may be used as long as it does not contaminate water and soil.

A specific example of the protective sheet 34 is a polyester nonwoven fabric.
Further, the water shielding sheet 36 may have any strength as long as rainwater does not leak outward even when the underground water tank unit 20 is full.
Specific examples of the water shielding sheet 36 include a polyethylene sheet and a vinyl acetate sheet.
As shown in FIG. 9, a reinforcing plate 38 is provided at the bottom of the enveloping body 26 next to the protective sheet 34 positioned on the outermost surface side of the carry-in bag 28.

  This reinforcing plate 38 does not cause the internal water storage block group 22 to wobble or scatter when the underground water storage tank unit 20 is lifted with the water storage block group 22 carried into the enveloping body 26. This is to enable the underground water tank unit 20 to be carried into the buried hole in a unitized state.

  The reinforcing plate 38 may be anything as long as it has a strength that does not cause damage even if the underground water storage tank unit 20 is lifted in a state where the water storage block group 22 is carried into the enclosure 26.

  A specific example of the reinforcing plate 38 is a plastic cardboard (pradan) that is generally widely marketed. The strength may be adjusted according to the weight of the underground water storage tank unit 20.

  In this embodiment, the reinforcing plate 38 is provided in the second layer from the outermost surface side of the carry-in bag 28. However, this position is not particularly limited, and any position other than the outermost surface is provided. It may be present and the number of sheets is not particularly limited. Further, the number of the protective sheets 34 and the water shielding sheets 36 is not particularly limited, and a plurality of the same sheets may be overlapped.

  In addition, the underground water storage tank unit 20 may be provided in advance with an inflow pipe 62 for allowing rainwater to flow into the underground water storage tank unit 20 and a water intake pipe 52 used for pumping the stored rainwater.

These pipes can be installed after the underground water tank unit 20 is carried into the burial hole, but in view of shortening the construction period and the certainty of attachment, it is preferable to form these pipes before construction.
Further, as shown in FIG. 10, a grassproof bag 40 may be arranged on the underground water tank unit 20 and covered from above the underground water tank unit 20 as shown in FIG.

  In the case of the laminated body of the protective sheet 34 and the water shielding sheet 36 as shown in FIG. 7, there is no possibility that the grass roots extending from the ground 70 break the encapsulant 26 and enter the inside, but the grass bag 40 If is used, the certainty is further increased, so that it is possible to prevent the flooding more surely.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made without departing from the object of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Underground water storage structure 20 ... Underground water tank unit 22 ... Water storage block group 24 ... Water storage block 26 ... Cover body 28 ... Carry-in bag 30 ... Folding part 32. ..Opening 34 ... Protective sheet 36 ... Water shielding sheet 38 ... Reinforcing plate 40 ... Weedproof bag 50 ... Pump 52 ... Water intake pipe 54 ... Water intake means 60 ... Inlet 62 ... Inflow pipe 64 ... Water collecting means 66 ... Overflow pipe 70 ... Ground 100 ... Underground water storage structure 102 ... Underground water storage tank 104 ... House 106 ... Water collecting means 108 ... Water intake means 110 ... Water shielding sheet 112 ... Water storage block group

Claims (7)

An enveloping body used for an underground water tank unit configured by liquid-tightly encapsulating a synthetic resin water storage block group with an enveloping body,
The encapsulation is
A bag-like carrying bag that has an opening on the top side and can carry the water storage block group into the inside from the opening;
A plurality of folded portions provided at the edge of the opening of the carry-in bag and functioning as lids of the carry-in bag when folded;
With
The structure of the carry-in bag of the enveloping body is formed by alternately and repeatedly laminating at least a water-proof sheet for preventing water leakage and a protective sheet for preventing breakage of the water-proof sheet, and the protective sheet is formed on the carry-in bag. Multi-layer structure located on the outermost surface side,
An enveloping body used for an underground water storage tank unit, further comprising a reinforcing plate on a bottom surface portion of the carry-in bag. The reinforcing plate is
The enveloping body used for the underground water storage tank unit according to claim 1, wherein the enveloping body is provided between the water shielding sheet and the protective sheet. The carrying bag of the envelope is
It is comprised in the shape of a square bag, The covering body used for the underground water tank unit of Claim 1 or 2 characterized by the above-mentioned.   The enveloping body used for the underground water storage tank unit according to any one of claims 1 to 3, further comprising an inverted bag-shaped weed bag covering the encapsulating body from above the encapsulating body.   5. An underground water tank unit, wherein a resin resin block group is liquid-tightly encapsulated in an encapsulant used in the underground water tank unit according to claim 1.   The underground water storage tank unit according to claim 5, further comprising an inflow pipe for allowing rainwater to flow into the underground water storage tank unit on the top side of the enclosure.   The underground water tank unit according to claim 5 or 6, further comprising a water intake pipe used when pumping rainwater stored in the underground water tank unit on the top side of the enclosure.

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