JP4759441B2 - Rainwater storage and penetration facility - Google Patents

Description

  The present invention relates to a rainwater storage and infiltration facility for storing rainwater and / or the like in a storage tank buried underground and / or infiltrating rainwater and the like into soil through the storage tank.

  2. Description of the Related Art Conventionally, a resin rainwater storage and penetration facility is known in which a plurality of resin filling members are arranged continuously in the vertical and horizontal directions inside a storage tank. Such resin-made rainwater storage and penetration facilities are widely used because of their high storage efficiency and excellent workability.

  However, since this resin-made rainwater storage and penetration facility lacks the strength against horizontal load, the rainwater storage and penetration facility can only be buried to a depth of about 4 m from the ground surface.

  Conventionally, concrete rainwater storage and penetration facilities made of precast concrete blocks have also been widely used, and such concrete rainwater storage and penetration facilities can ensure sufficient strength against horizontal loads. Since it can, it can be deeply embedded to a depth of about 10 m from the ground surface. However, when a concrete rainwater storage and penetration facility is made to be deeply embedded, a problem arises in that the storage efficiency decreases because the concrete member becomes thick.

  From the above, it has been extremely difficult to realize a rainwater storage and penetration facility that enables deep burying of storage tanks, high storage efficiency, and excellent workability.

  On the other hand, a rainwater storage and penetration facility has been proposed in which a water storage space is provided on a base frame that is large enough for a cleaning worker to enter inside (see, for example, Patent Document 1).

In this rainwater storage and penetration facility, in order to be able to withstand horizontal load and vertical load, a reinforcing member is separately prepared, and this reinforcing member is assembled and disposed in the water storage space together with the spacer unit for constructing the water storage space. It is configured as follows.
JP 2001-90167 A

  However, in the rainwater storage and infiltration facility described in Patent Document 1, since a reinforcing member is used so as to be able to withstand horizontal loads and vertical loads, complicated assembly work is required. Moreover, since the volume of the water storage space is reduced by the reinforcing member, the storage efficiency is also reduced. Furthermore, since a reinforcing member is not used at the bottom where a large load acts, it is not possible to cope with deep embedment. In addition, the base frame is provided only for people to enter for the purpose of maintenance of the rainwater storage and penetration facility, and is not provided to cope with the horizontal load. Moreover, since the base frame does not form a large space, maintenance over a wide range is required, and maintenance is difficult.

  The present invention was devised in view of such circumstances, and an object of the present invention is to enable deep burying of a storage tank and increase storage efficiency in a rainwater storage and penetration facility.

In order to achieve the above object, the present invention is a rainwater storage and infiltration facility for storing rainwater or the like in a storage tank buried underground and / or infiltrating rainwater or the like into the soil through the storage tank. The first reservoir is composed of a first reservoir and a second reservoir, and the first reservoir is formed of a resin member having high strength against a vertical load received by the upper surface of the first reservoir, and the second reservoir the strength against the horizontal load side of the second reservoir receives is formed by strong concrete member, the upper surface of the second reservoir and the first reservoir is disposed in said first reservoir , wherein the contaminants collecting means for collecting the contaminants contained in the rainwater is led to the first storage portion is provided et the.

  According to this invention, the vertical load received by the upper surface of the storage tank and the horizontal load received by the side surface of the storage tank can be shared by the first storage part and the second storage part. It is sufficient to design the strength with an emphasis on securing the strength against the load, and it is sufficient to design the strength with an emphasis on securing the strength against the horizontal load with respect to the second reservoir.

  Therefore, the first storage part can be designed to increase the storage efficiency without considering the strength against the horizontal load. On the other hand, it becomes possible to design the second reservoir so as to ensure sufficient strength against a horizontal load and cope with deep embedment.

  Thus, since a 1st storage part and a 2nd storage part can be designed separately, while being able to embed a storage tank deeply, storage efficiency can be raised.

  In addition, by designing the first storage part and the second storage part as described above, it becomes possible to embed the storage tank without using a reinforcing member, so that it is possible to prevent a reduction in storage efficiency due to the reinforcing member, Construction is simple, the construction period can be shortened, and the cost can be reduced.

  Here, the vertical load is a vertical earth pressure due to the earth covering of the upper part of the storage tank or an overload of a vehicle etc., and the horizontal load is a horizontal earth pressure (side earth pressure acting on the side surface of the storage tank). ).

  The present invention is characterized in that, in the rainwater storage and penetration facility described above, a first storage part is disposed on an upper surface of the second storage part.

  According to this invention, since the 1st storage part is located in the upper part of a storage tank, since it is sufficient to consider the horizontal earth pressure only corresponding to shallow embedding, strength with respect to a horizontal load is sufficient to the 1st storage part. It is possible to design to increase the storage efficiency with almost no consideration. On the other hand, since the 2nd storage part is located in the lower part of a storage tank, the strength with respect to the horizontal load of the 2nd storage part is designed so that it can respond even if the embedding depth from the ground surface becomes deep, and storage It becomes easy to realize deep embedding of the tank.

  Thus, since a 1st storage part and a 2nd storage part can be designed separately, while being able to embed a storage tank deeply, storage efficiency can be raised.

  The present invention is characterized in that, in the above-described rainwater storage and penetration facility, the first storage portion is formed of a resin member.

  According to this invention, since the 1st storage part is formed with the resin-made member which was lightweight and excellent in workability, storage efficiency can be raised and workability can also be improved.

  Moreover, when the 1st storage part is arrange | positioned on the upper surface of a 2nd storage part, since the 1st storage part is lightweight, the mounting load which acts on a 2nd storage part can be reduced. Therefore, it is possible to design the second storage unit so as to increase the storage efficiency by using a method that corresponds to deep embedding and reduces the thickness of a member that bears the loading load, for example.

  The present invention is characterized in that, in the rainwater storage and penetration facility described above, the second storage portion is formed of a concrete member.

  According to this invention, since the 2nd storage part is formed with the member made from a concrete strong with respect to a horizontal load, it can respond to embedding the 2nd storage part to the considerable depth from the ground surface. Therefore, the storage tank can be deeply embedded while ensuring the storage efficiency.

  The present invention is characterized in that, in the rainwater storage and infiltration facility described above, the first storage part is provided with a foreign substance collecting means for collecting the foreign substances contained in the rainwater introduced to the first storage part. .

  According to the present invention, since the contaminant collection means is provided, the contaminants in the rainwater can be collected at a specific location, and the collected contaminants can be easily removed. Therefore, it is possible to easily maintain and manage the rainwater storage and penetration facility.

  In this case, as the contaminant collection means, a plurality of filling members having inclined surfaces are arranged in the first reservoir so as to form contaminant accumulation points where the contaminants in rainwater naturally collect by the flow of rainwater. It is also possible to provide a sand settling tank in which impurities settle. Further, a filter or a screen may be used.

  In the rainwater storage and infiltration facility described above, the present invention provides a first storage section and a second storage section in a portion in which contaminants are collected by the contaminant collection means of the first storage section, and a second storage section corresponding to this portion. A communication means for communicating with the section is provided.

  According to the present invention, since the foreign matter collected by the foreign matter collecting means is guided to the second storage portion via the communication means, the foreign matter can be collected at a specific location of the second storage portion, and maintenance performance is improved. Can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, in a rainwater storage penetration facility which stores rainwater etc. in a storage tank buried underground and / or infiltrates rainwater etc. into the soil via the storage tank, the storage tank can be deeply embedded. At the same time, the storage efficiency can be increased.

<First Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic configuration of a rainwater storage and penetration facility according to the first embodiment of the present invention.

  This rainwater storage and penetration facility temporarily stores rainwater when heavy rain falls, and has an outflow suppression effect that prevents the river flow rate from rapidly increasing. And the stored rainwater etc. can also be utilized as watering for planting, water for car washing, water for life in emergency, and water for fire prevention, and as shown in FIG. 1, 1st storage part 1A and 2nd storage The storage tank 1 is disposed so that the portion 1B has two upper and lower layers.

  The storage tank 1 is provided in an excavation part formed by digging the ground surface into a rectangular shape, and the bottom surface of the excavation part is a base part formed by laying and solidifying a crushed stone or the like. The bottom surface of the storage tank 1 is basically a flat surface, the second storage portion 1B is disposed on the bottom surface, and the first storage portion 1A is disposed on the top surface of the second storage portion 1B.

  In the upper part of the storage tank 1, there are a water conduit (not shown) for guiding rainwater and the like from a gutter that collects rainwater and the like in the vicinity, and an overflow pipe (not shown) for discharging rainwater when the storage tank 1 is full. (Not shown) is connected, and an orifice pipe (not shown) is provided in the lower part of the storage tank 1 to gradually drain the rainwater stored in the storage tank 1.

  In the first reservoir 1A, a large number of filling members 3 having guiding means for guiding rainwater and the like in a desired direction by gravity and / or rainwater flow are arranged horizontally and are stacked one above the other. .

  Moreover, the circumference | surroundings of 1 A storage part 1A are coat | covered with the waterproof sheet (illustration omitted), and it is aimed so that rain water can be stored in the internal space of 1 A storage part 1A. In the case of a rainwater infiltration facility, a water permeable sheet is used instead of the waterproof sheet.

  For example, as shown in FIG. 3, the filling member 3 is formed of plastics such as polyethylene, polypropylene, vinyl chloride, polyethylene terephthalate, or waste plastics thereof, and has four columnar connections that secure the space of the storage tank 1. It is comprised from the part 31 and the inclination board part 32 which is fixed to the four connection parts 31 and inclines at an angle of about 5 degree | times with respect to a horizontal surface.

  The filling member 3 may be stacked with the connecting member 310 sandwiched between the upper portions of the connecting portions 31.

  And the filling member 3 is arrange | positioned so that the rainwater induced | guided | derived by the inclination board part 32 may produce a water flow, and may fall from the clearance gap between the inclination board parts 32 gradually, for example. Since the filling member 3 is arranged in this way, rainwater including foreign substances such as earth and sand is guided and dropped in the direction of the accumulation unit 10, and the foreign substances are naturally collected in the accumulation unit 10.

  For example, as shown in FIG. 4, the second storage unit 1 </ b> B stores a combination of a plurality of precast concrete beam members 41, column members 42, wall members 43, top plate members 44, bottom plate members 45, and column base members 46. It is comprised by the concrete block tank 4 arrange | positioned so that space may be formed.

  The second reservoir 1B is provided with a manager hole (not shown) for maintenance.

  Furthermore, as shown to Fig.5 (a), the recessed part 100 is provided in the upper surface of the 2nd storage part 1B corresponding to the accumulation | storage part 10 of the above-mentioned 1st storage part 1A, and the 1st storage part 1A of FIG. Rainwater guided by the filling member 3 is guided in the direction of the recess 100, and impurities are collected in the recess 100. And the opening part 11 is provided in the recessed part 100 so that 1A of 1st storage parts and the 2nd storage part 1B may connect. In this case, the waterproof sheet of the accumulation unit 10 of the first storage unit 1A corresponding to the opening 11 is opened.

  Therefore, rainwater flows into the second storage unit 1B from the first storage unit 1A through the opening 11, and the contaminants collected in the accumulation unit 10 are located in the second storage unit 1B through the opening 11. To be discharged.

  Since it is comprised as mentioned above, the operation | work which discharges impurities out of a rainwater storage penetration facility is simple, and maintenance management becomes easy. For example, if the accumulated contaminants are discharged about once or twice a year, the frequency of maintenance of the lower part of the second reservoir 1B over a wide range can be reduced to about once every 10 years.

  Moreover, since the rainwater which flowed into the 2nd storage part 1B via the opening part 11 from the 1st storage part 1A is stored by the 2nd storage part 1B, both the 2nd storage part 1B and the 1st storage part 1A are stored. Can store rainwater. And since the volume of a 2nd storage part can also be increased by enabling deep embedding, it becomes possible to raise storage efficiency further.

  As described above, instead of providing the recess 100 on the upper surface of the second reservoir 1B, for example, as shown in FIG. 5B, a U-shaped groove 101 is provided in the stacking portion 10 of the first reservoir 1A. It may be provided and arranged on the upper surface of the second reservoir 1B. In this case, since it is not necessary to form the recessed part 100 in the concrete member of the 2nd storage part 1B, the process of processing a concrete member can be skipped and cost can be reduced.

  Moreover, what comprises the 2nd storage part 1B is not limited to the above-mentioned concrete block tank, For example, you may comprise by what arranged the box culvert in parallel. In this case, construction is simple and the construction period can be further shortened.

  In the present embodiment, the ratio of the height of the first reservoir 1A and the height of the second reservoir 1B can be selected as appropriate in accordance with the side earth pressure that increases with the embedding depth of the reservoir 1. .

  For example, as shown in FIG. 1, when the depth L1 of the embankment is 0.6 m, the height L2 of the first reservoir 1A is set to 3.4 m that can be handled by a resin member, and the second reservoir The height L3 of 1B is 0.5 m. As a result, the rainwater storage and penetration facility can be buried to a depth of 4.5 m from the ground surface.

  On the other hand, in the example shown in FIG. 2, when the depth L1 of the embankment is 2.0 m, the height L2 of the first reservoir 1A is 1.0 m that can be handled by a resin member, and the second reservoir The height L3 of 1B is set to 7.0 m. As a result, the rainwater storage and penetration facility can be buried to a depth of 10 m from the ground surface.

  Thus, in this embodiment, since 1 A of 1st storage parts are formed with the resin-made members excellent in workability with the light weight, the mounting load which acts on the 2nd storage part 1B can be reduced. Therefore, the member thickness of the concrete member constituting the second storage part 1B can be reduced, and the storage efficiency can be increased.

  Moreover, since the 1st storage part 1A is formed with the resin-made member, since the storage tank 1 becomes lightweight compared with the case where the whole storage tank 1 is formed with a concrete member, the supporting force of the ground can be reduced. The range of applicable ground becomes wider, and in some cases, ground improvement becomes unnecessary. Moreover, since the load with respect to the ground can be reduced, the possibility of uneven settlement can be reduced.

Furthermore, since the storage tank 1 can be constructed with a precast concrete product and a resin product, the workability is improved and the construction period can be greatly shortened.
< Reference example >
Next, reference examples of the present invention will be described with reference to the drawings.

FIG. 6 shows a schematic configuration of a rainwater storage and penetration facility according to a reference example of the present invention.

  This rainwater storage and penetration facility is characterized in that the first storage unit 1A is configured to be surrounded by the second storage unit 1B.

  In addition, since a basic structure is the same as that of said rainwater storage penetration facility, the same code | symbol is attached | subjected about the thing of the same structure, and detailed description is abbreviate | omitted.

  In the upper part of the storage tank 1, a water guide pipe 2 that guides rainwater and the like from a side groove that collects rainwater and the like that has fallen in the vicinity is provided so as to penetrate the first storage part 1A and the second storage part 1B. (See FIG. 7) Rainwater is first guided to the first reservoir 1A.

  A concave portion 102 is formed in the first storage portion 1 </ b> A so as to correspond to the accumulation portion 10 through which rainwater is guided by the filling member 3. Therefore, since the contaminants contained in the rainwater led to the first storage part 1A are collected in the recessed part 102, the operation of discharging the contaminants outside the rainwater storage and penetration facility is simple, and the rainwater storage and penetration facility Easy maintenance.

  The recessed portion 102 and the ground are in communication with each other through a communication hole (not shown) for maintenance.

  In addition, an inflow portion 12 that communicates the first storage portion 1A and the second storage portion 1B is provided at a predetermined location on the boundary surface between the first storage portion 1A and the second storage portion 1B. Thus, rainwater can flow from the first reservoir 1A to the second reservoir 1B. Therefore, when the rainwater stored in the first storage unit 1A reaches a predetermined amount of water, it flows into the second storage unit 1B and is stored by storing rainwater in both the first storage unit 1A and the second storage unit 1B. Efficiency can be improved.

  In this case, since rainwater is first guided to the first reservoir 1A, the contaminants contained in the rainwater are collected in the recessed portion 102, so that the contaminants are present in the rainwater flowing into the second reservoir 1B. It is not included, and impurities are not deposited on the bottom surface of the second storage unit 1B, and maintenance is good.

  In addition, the inflow part 12 should just be provided in the at least 1 location of the interface of 1st storage part 1A and 2nd storage part 1B.

In the present reference example , since the first reservoir 1A is surrounded by the second reservoir 1B, a waterproof sheet (a permeable sheet in the case of a permeation facility) may be provided only on the bottom surface of the first reservoir 1A. Therefore, the cost required for the sheet can be reduced.

Thus, in this reference example , since the 1st storage part 1A is surrounded by the 2nd storage part 1B, the filling member 3 is made into consideration without considering the intensity | strength with respect to a horizontal load with respect to 1st storage part 1A inside. Can be stacked. In addition, even if ground fluctuation occurs due to an earthquake or the like, there is no possibility that the filling member 3 of the first reservoir 1A will collapse.

  Moreover, since the 2nd storage part 1B is formed with a concrete member, since considerable weight is ensured, compared with the case where the storage tank 1 is comprised only with resin members, the resistance with respect to the lift which arises by buoyancy is improved. Can be increased.

  As mentioned above, although the Example as an example was demonstrated about embodiment of this invention, it is not restricted to the Example mentioned above.

  In the rainwater storage and penetration facility for storing rainwater or the like in a storage tank buried underground and / or infiltrating rainwater or the like into the soil through the storage tank, the present invention enables deep storage of the storage tank, It can be applied to rainwater storage and penetration facilities that can increase storage efficiency.

It is the schematic which shows typically the cross section of one Embodiment of the rainwater storage penetration facility which concerns on this invention. It is the schematic which shows typically the cross section of one Embodiment of the rainwater storage penetration facility which concerns on this invention. It is a perspective view which shows an example of the filling member of this invention. It is a side view which shows typically the outline of the concrete member which comprises the 2nd storage part of the rainwater storage penetration facility which concerns on this invention. It is a perspective view which shows typically the outline of the communication means of one Embodiment of the rainwater storage penetration facility which concerns on this invention. The cross-section of the rainwater reservoir infiltration facilities according to a reference example of the present invention is a schematic diagram schematically showing. It is a top view which shows typically the outline of the rainwater storage penetration facility shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage tank 1A 1st storage part 1B 2nd storage part 10 Accumulation part 11 Opening part (communication means)

Claims (2)

In rainwater storage and infiltration facilities that store rainwater etc. in a storage tank buried underground and / or infiltrate rainwater etc. into the soil through the storage tank,
The storage tank is composed of a first storage part and a second storage part, and the first storage part is formed of a resin member having a strong strength against the vertical load received by the upper surface of the first storage part, It said second storage unit, the strength against the horizontal load side of the second reservoir receives is formed by strong concrete member, a first reservoir is disposed on the upper surface of the second reservoir,
Wherein the first reservoir, rainwater storage infiltration facilities, wherein the contaminants collecting means for collecting the contaminants contained in the rainwater is led to the first reservoir is provided et the. In the rainwater storage and penetration facility according to claim 1 ,
Parts contaminants are collected by the contaminants collecting unit, and the second storage unit corresponding to this portion, and wherein the communication means is provided et the communicating with the first reservoir and a second reservoir Rainwater storage and penetration facility.

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