JP2006336405A - Rainwater storage structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater storage structure, the structure of which is used to enable a reduction in manufacturing cost, and which can maintain the high water quality of stored rainwater. <P>SOLUTION: A pipe-like vertical member 3 is joined to a horizontal member 2 capable of being assembled to the vertical member 3, so that a three-dimensional structure A, in which a space is formed to enable the storage of the rainwater, can be formed in a recess on the ground; and covering layers 5 and 6 are provided on the surface of the three-dimensional structure A. An aeration device 15, which feeds air through the inside of the member 3 and aerates the rainwater stored in the three-dimensional structure A, can be mounted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rainwater storage structure, and more specifically, by joining a pipe-shaped vertical member and a horizontal member that can be assembled to the pipe-shaped vertical member, a tertiary space is formed so that rainwater can be stored therein. The present invention relates to a rainwater storage structure in which an original structure is formed in a ground recess and has a coating layer on the surface of the three-dimensional structure.

  In recent years, particularly in urban areas, problems such as abnormal rainfall and flooding, and vice versa, have frequently occurred, and the cause is the heat island phenomenon. In order to alleviate this phenomenon, the construction of facilities that use rainwater has been proposed, and development of rainwater storage structures or rainwater storage fillers has been progressing.

  As such a rainwater storage structure, for example, a pit is dug in the ground, a water shielding sheet is laid on the outer surface, a plurality of container-like members are stacked vertically and horizontally, and a top cover is covered with soil. The invention of the structure which gives and coats etc. and stores rainwater is made | formed (patent document 1).

  When such a rainwater storage structure is constructed, microorganisms and the like propagate in rainwater stored for a long time, and the water quality may be significantly contaminated. Therefore, the range of use of stored rainwater is not so wide, and when rainwater exceeding the storage capacity flows in and discharges overflowing rainwater, the discharge of contaminated rainwater damages the environment. It will be a thing.

  Therefore, as a means for improving the water quality, a rainwater storage device has been proposed in which a diffuser pipe having a large number of exhaust holes is arranged in the water tank and air is bubbled from the air diffuser pipe to remove deposits in the water tank. (Patent Document 2).

JP-A 63-268823 JP 2000-160606 A

  However, the rainwater storage device of the above prior art has a problem that the construction of arranging a large number of diffuser pipes in the water tank is complicated and expensive, and it cannot be said that it is practical and rainwater storage with lower manufacturing costs. There is a strong demand for realization of structures.

  Accordingly, in view of the above-described problems of the prior art, an object of the present invention is to use the structure of a rainwater storage structure to reduce the manufacturing cost and maintain the quality of stored rainwater at a high level. It is to provide a storage structure.

  The above-mentioned subject is achieved by the invention described in each claim. That is, the characteristic configuration of the rainwater storage structure according to the present invention is that a pipe-shaped vertical member and a horizontal member that can be assembled with this pipe-shaped vertical member can be joined to form a space therein to store rainwater. A three-dimensional structure is formed in the ground recess, and has a coating layer on the surface of the three-dimensional structure, and air is sent through the pipe-shaped vertical member to enter the three-dimensional structure. An aeration apparatus for exploding the stored rainwater can be attached.

  According to this configuration, since the aeration apparatus is attached to a member constituting the three-dimensional structure and air is sent through the member, the stored rainwater can be aerated and cleaned. It is not necessary to install a diffuser pipe in the water tank at such a large amount of construction cost, and it is possible to effectively clean rainwater at a low cost, prevent deterioration of water quality, and store rainwater with high utility value. Can do. Moreover, when transporting to the construction site of the three-dimensional structure, the pipe-like vertical member and the horizontal member can be efficiently transported as respective members without being assembled, and these members can be transported at the construction site. By assembling, the transportation cost can be greatly reduced, and the construction cost can be reduced.

  As a result, using the structure of the rainwater storage structure, it was possible to provide a rainwater storage structure that can reduce the manufacturing cost and maintain the quality of the stored rainwater at a high level.

  The pipe-like vertical member is composed of a plurality of resin members having a predetermined length, and a convection generating mechanism for convection of the rainwater stored inside the three-dimensional structure, and a rainwater storage structure for storing the rainwater It is preferable that a solid material recovery device capable of recovering the solid material deposited inside is provided.

  According to this configuration, when transporting to the construction site of the three-dimensional structure, it can be transported more efficiently, and by changing the shape such as the length and diameter of the resin pipe-like longitudinal member and the transverse member In addition, it is possible to respond flexibly according to the shape of the rainwater storage structure, and the degree of freedom in design is increased. In addition, by installing a convection generating mechanism inside the three-dimensional structure storing rainwater, for example, on one end side, and operating it regularly or irregularly to convect the internal water storage, three-dimensional Not only solids such as earth and sand adhering to the structure itself, but also solids accumulated at the bottom of the rainwater storage structure can be moved to the other, and these solids can be moved to the other using a solids recovery device. Thus, the inside of the rainwater storage structure can be efficiently cleaned at all times, and the high function of rainwater storage can be maintained even for many years of use.

  In addition, in this specification, a solid substance is used as a concept showing the thing of the solid state which widely contains various granular materials, such as earth and sand, dust, etc. which are mixed in rainwater.

  The convection generating mechanism is a vacuum suction device in which a lower recess is formed in the ground recess on the facing side, and the solid matter recovery device can discharge the solid matter stored in the recess. It is preferable.

  According to this configuration, the solid matter that has been convected and moved can be collected in the recess opposite to the position of the convection generating mechanism, and then the solid matter that has accumulated in the recess is stored in the rainwater storage structure by the vacuum suction device. Since it can be discharged outside the object, the inside of the structure can be reliably kept clean.

The pipe-shaped vertical member and the horizontal member are joined to a three-dimensional structure via a connection jig, and the connection jig is fitted and attached to the pipe-shaped vertical member. In addition, the three-dimensional structure formed by the pipe-shaped vertical member, the horizontal member, and the connecting jig is at least 108 kN / m ² or more. It is preferable to have a compressive strength of

  According to this configuration, even if the top cover is covered with about 2 m, it has sufficient strength that is at least three times the earth pressure, and a highly durable rainwater storage structure can be obtained.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic front cross-sectional structure of a rainwater storage structure according to this embodiment, and FIGS. 2 and 3 are formed by combining a connecting jig 1, a horizontal member 2, and a pipe-shaped vertical member 3. The partial front cross-section structure of the assembly A for rainwater storage structures of a jungle gym shape which is a three-dimensional structure which can be stored, and a partial planar structure are shown.

  In forming the rainwater storage structure, first, a ground recess (hereinafter sometimes referred to as a pit) of about 1 to 5 m is excavated and formed in the ground, and a side groove 7 is formed around the pit, and a crushed stone is formed on the bottom surface of the pit. Laying and constructing sand etc. and leveling it will form the foundation. After laying a water-impervious sheet 4 which is a water-impervious material on the surface, from each pipe-like vertical member 3 made of resin and the connecting jig 1, as shown in FIGS. The gym-shaped rainwater storage structure assembly A is disposed. When the internal volume of the pit is large, the rainwater storage structure assembly A may be assembled in the pit, or after the rainwater storage structure assembly A is assembled outside the pit, it is arranged in the pit. Also good. The rainwater storage structure assembly A thus assembled is preferably fastened and fixed with a belt made of resin or metal. Further, a square panel may be fitted between the pipes on the outer peripheral portion of the side surface of the rainwater storage structure assembly A to ensure flatness at the outer peripheral portion of the side surface and increase the strength.

  Next, the side surface portion of the rainwater storage structure assembly A disposed in the pit is not shown, but is backfilled as necessary, and the piping 8 communicates so that rainwater can be poured into the pit from the side groove 7. Further, the upper surface is covered with a water-impervious sheet 5, and about 0.5 to 1 m of earth and sand is covered from above to form a covered soil 6. These water-impervious sheet 5 and cover soil 6 on the upper surface form a coating layer. And the inspection hole 10 is provided in the several places of these coating layers 6. FIG. Instead of coating the water shielding sheet 5 on the upper surface of the rainwater storage structure assembly A, the rainwater may be permeated by coating a water permeable sheet. The side groove 7 is somewhat deep at the bottom so that a mud pool 9 is formed at the bottom.

  And the convection production | generation mechanism 11 which convects the rainwater stored inside the assembly A for rainwater storage structures can be inserted through the inspection hole 10, and can be removed suitably if the convection of predetermined time is complete | finished. It is like that. As the convection generating mechanism 11, for example, a screw device 11b can be provided at the tip of the shaft 11a. The screw device 11b is inserted into the rainwater storage structure assembly A and driven by an electric motor (not shown). 11b is driven to agitate and convect the rainwater stored, and the earth and sand adhering to the rainwater storage structure assembly A is dropped to the bottom, and the earth and sand accumulated on the bottom are removed. Push towards the other side. A recess 12 lower than the bottom of the pit is formed on the other side where the rainwater storage structure assembly A is arranged, and sediment or the like is deposited in the recess 12 by convection of the stored rainwater by the convection generating mechanism 11. Will be. In this case, the bottom of the pit may be inclined toward the recess 12. After convection is generated by the convection generation mechanism 11 for a predetermined time, it may be removed.

  The deposit 14 such as earth and sand deposited in the recess 12 has a long hose or the like through the inspection hole 10 or the like as needed and can be inserted into the recess 12. 13 is discharged outside the pit. As the vacuum suction device 13, various commercially available vacuum devices according to the storage capacity and specifications of rainwater can be selected and adopted.

  Further, the aeration device 15 can be connected to the pipe-shaped vertical member 3 constituting the rainwater storage structure assembly A through the inspection hole 10, and fresh air is sent to the rainwater stored inside to be aerated. By oxidizing, rainwater can be purified and deterioration of water quality can be prevented. As will be described later, the aeration apparatus 15 can be connected to the upper portion of the pipe-like vertical member 3 and is connected to an air supply pump P. By operating this air supply pump P, air is sent into the interior 3 a of the pipe-like vertical member 3, and air is discharged from the air diffuser holes formed near the bottom of the pipe-like vertical member 3. The aeration device 15 is detachable and can be removed when the aeration process is completed.

  As a power source used for the convection generating mechanism 11, the vacuum suction device 13, and the aeration device 15, in addition to a commercial power source, a portable power generator, a battery such as various primary batteries, a secondary battery, or the like can be used. May be provided with a solar cell power generation device, a wind power generation device, or the like on the ground portion of the rainwater storage structure, and the electric power obtained therefrom may be used. In particular, the screw device 11b of the convection generating mechanism 11 and the wind power generation propeller may be directly connected to rotate the screw device 11b.

  Next, the rainwater storage structure assembly A and members constituting the same will be described. The connection jig 1 shown in FIGS. 2 and 3 is made of resin, and is engaged with the cylindrical portion 1a that can be fitted onto the pipe-shaped vertical member 3 and the end of the horizontal member 2 that protrudes from four locations on the outer peripheral surface. The projecting portion 1b is formed with four through holes 1c that receive and engage the end projection 2a of the lateral member 2. Further, a slightly smaller diameter through hole 1d is formed inside the cylindrical portion 1a to reduce weight, and rainwater is moved downward to be stored.

  The horizontal member 2 is made of resin, and as shown in FIG. 2, end projections 2a that are inserted into and engaged with the through holes 1c of the connecting jig 1 are formed downward at both ends, and the longitudinal members 2 Reinforcing ribs 2b are provided at predetermined intervals in two places. However, the number, position, shape, and the like of the reinforcing rib 2b can be variously changed.

  The pipe-like vertical member 3 is made of resin, has a cylindrical shape having a predetermined length, and can be fitted in the cylindrical portion 1 a of the connection jig 1. Then, the connection jig 1 is fitted and attached to the upper end of each of the pipe-like vertical members 3, and the connection jigs 1 attached to the two pipe-like vertical members 3 are connected to each other. The pipe-shaped vertical member 3 and the horizontal member 2 are connected by inserting and engaging the end protrusions 2a of the horizontal member 2 into the through holes 1c of the two connecting jigs 1 adjacent to each other, By repeating this, as shown in FIGS. 2 and 3, a rainwater storage structure assembly A that forms a three-dimensional structure in a jungle gym shape is formed.

  Although not shown, the uppermost end of the pipe-shaped vertical member 3 can be connected to the aeration device 15 described above, and an appropriate amount is provided on the side wall of the pipe-shaped vertical member 3 located near the bottom of the pit. A plurality of through holes (not shown) are formed at intervals, and when air is supplied from the aeration device 15, the air passes through the inside 3 a of the pipe-like vertical member 3 and is released from the through holes. It has become so. Periodically or irregularly, by supplying air from the air pump P of the aeration device 15 to the inside 3a of the pipe-shaped vertical member 3, it is possible to prevent the growth of microorganisms in the stored rainwater, It can store rainwater with clean water quality. The connection between the uppermost end of the pipe-shaped vertical member 3 and the aeration device 15 may be a fitting type, a screw connection, or a variety of commercially available fastening jigs.

The rainwater storage structure assembly A, which is a three-dimensional structure, preferably has a compressive strength of at least 108 kN / m ² or more. In this way, even if covering soil of about 2 m (load: about 36 kN / m ² ) is applied to the uppermost part, it has sufficient strength to be at least three times the earth pressure. Specifically, when a pipe-like member having a length of about 40 cm is used, a pipe-like member having a compressive strength of at least 27 kN / piece by 4 pieces / unit is used, and when a pipe-like member having a length of about 40 cm is used. 6.25 pipe / m ² and at least a compressive strength of about 17.28 kN / piece is used.

  In this way, rainwater is temporarily stored and used for various purposes such as watering gardens, washing water, emergency water, etc., and an adjustment function that can gradually discharge a large amount of rainwater is provided. be able to. And since the curing period etc. are unnecessary compared with the case where it comprises with concrete, the construction speed of a rainwater storage structure can be made markedly faster.

  Below, the construction example which used the rainwater storage structure assembly A which assembled the rainwater storage structure assembly member which concerns on this embodiment for a rainwater storage structure is demonstrated.

A polypropylene pipe (made by Fuji Chemical Co., Ltd., trade name: Fuji Polypropylene-PP) with an outer diameter of about 60 mm, a wall thickness of about 5.0 mm, and a length of about 400 mm is used. A rainwater storage structure assembly A having a height of about 3 m and a height and width of about 3 m was formed and placed in a pit having a predetermined internal volume of about 5 m in depth to construct a rainwater storage structure. This polyethylene pipe has a compressive strength of about 17.28 kN / piece in the longitudinal direction. When 6.25 pipes are used per 1 m ² , a compressive strength of 108 kN / m ² is obtained and the covering soil is 2 m (load). : About 36 kN / m ² ), it can be seen that the compression strength of about 3 times is obtained, which is sufficiently practical.

  Actually, a rainwater storage structure with a size of 1.2m x 1.2m x 1.2m was constructed, and a weight equivalent to 2m of cover soil was placed on it. There were no problems with deformation or other problems.

[Another embodiment]
(1) In the above embodiment, the convection generating mechanism 11, the solid matter collecting device 13, and the aeration device 15 are detachable, but they may be fixed to the rainwater storage structure. The pump P does not need to be plural as shown in FIG. 1, and air may be supplied using a single pump.
(2) In the case of the above embodiment, the material made of polypropylene is exemplified as the constituent material of the resin pipe-shaped member. However, the material is not limited to this, and polyethylene, polyvinyl chloride, PET (polyethylene terephthalate), etc. are used. Alternatively, various thermoplastic resins can be used as long as the required strength is obtained.
(3) In the above embodiment, an example in which the pipe-like member 3 is configured to be fitted in the cylindrical portion 1a of the connecting jig 1 has been described. However, the outer diameter of the cylindrical portion 1a of the connecting jig 1 is reduced. Then, it may be fitted into the pipe-shaped member 3.
(4) Although the pipe-shaped member, the transverse member, and the connection jig are made of the same resin material, they may be made of different resin materials.
(5) Powdery calcium carbonate (charcoal) or the like may be mixed into the constituent materials of the resin pipe-like member, the transverse member, and the connecting jig. In this way, the specific gravity of the constituent materials can be increased, the buoyancy that occurs when rainwater is stored can be resisted, special construction is not required as a buoyancy measure, and a larger amount of water can be stored even in a small space. It is preferable because it can be secured. Specifically, the specific gravity can be made 1.0 or more by mixing about 13% charcoal cal in the resin.
(6) When mixed in the above constituent materials, whiskers such as talc and barium sulfate may be mixed instead of charcoal cal. These have a larger aspect ratio than charcoal cal and have a large effect of increasing strength.
Furthermore, you may mix glass fiber in the said structural member. Glass fibers are preferable because they can not only increase the specific gravity of the constituent members but also increase the strength and dimensional stability. For example, when 4.6 wt% of glass fiber is added (30 parts added to 20 wt% masterbatch 100), the specific gravity is increased by 0.03, the strength is improved by 15%, and the shrinkage ratio is improved by 0.4% during molding. To do.

  The rainwater storage structure according to the present invention is not limited to the use as a tank for storing and using rainwater, but can also be used as a biotope or the like.

Schematic front sectional view of a rainwater storage structure according to an embodiment of the present invention Partial front sectional view of an assembly A for rainwater storage structure comprising a pipe-like longitudinal member, a transverse member and a connecting member Partial plan view of the rainwater storage structure assembly A in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection jig 2 Horizontal member 3 Pipe-shaped vertical member 5,6 Cover layer 11 Convection production | generation mechanism 12 Recess 13 Solid substance collection | recovery apparatus 14 Accumulated solid substance 15 Aeration apparatus A 3D structure

Claims (4)

The pipe-shaped vertical member and the horizontal member that can be assembled with this pipe-shaped vertical member are formed with a three-dimensional structure in the ground recess that forms a space inside and can store rainwater. In the rainwater storage structure having a coating layer on the surface of the three-dimensional structure,
A rainwater storage structure, wherein an aeration device for sending air through the pipe-shaped vertical member and exploding the rainwater stored in the three-dimensional structure can be attached. The pipe-like vertical member is composed of a plurality of resin members having a predetermined length, and a convection generating mechanism for convection of the rainwater stored inside the three-dimensional structure, and a rainwater storage structure for storing the rainwater The rainwater storage structure according to claim 1, further comprising a solid material recovery device capable of recovering the solid material accumulated in the interior of the rainwater storage device. The convection generating mechanism is a vacuum suction device in which a lower recess is formed in the ground recess on the facing side, and the solid matter recovery device can discharge the solid matter stored in the recess. The rainwater storage structure according to claim 1 or 2. The pipe-shaped vertical member and the horizontal member are joined to a three-dimensional structure via a connection jig, and the connection jig is fitted and attached to the pipe-shaped vertical member. In addition, the three-dimensional structure formed by the pipe-shaped vertical member, the horizontal member, and the connecting jig is at least 108 kN / m ² or more. The rainwater storage structure according to any one of claims 1 to 3, wherein the rainwater storage structure has the following compressive strength.

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