JP5610632B2 - Inspection port structure in rainwater storage facilities - Google Patents

Inspection port structure in rainwater storage facilities Download PDF

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JP5610632B2
JP5610632B2 JP2011021113A JP2011021113A JP5610632B2 JP 5610632 B2 JP5610632 B2 JP 5610632B2 JP 2011021113 A JP2011021113 A JP 2011021113A JP 2011021113 A JP2011021113 A JP 2011021113A JP 5610632 B2 JP5610632 B2 JP 5610632B2
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rainwater
frame
rainwater storage
inspection port
storage unit
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JP2012158962A (en
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文男 原田
文男 原田
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Sekisui Techno Molding Co Ltd
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Description

本発明は、公園や駐車場、或いは道路等の地面下に設けられる雨水貯留施設において、この雨水貯留施設内を点検するための点検口の構造に関する。   The present invention relates to a structure of an inspection port for inspecting the inside of a rainwater storage facility in a rainwater storage facility provided under the ground such as a park, a parking lot, or a road.

住宅地や道路等に降った雨水は地中に殆ど浸透することなく側溝や排水溝を通じて河川等に排出されているが、集中豪雨のように短時間で多量の降雨が発生すると、道路上に氾濫して交通マヒを引き起こすことになる。このため、従来から公園や駐車場、或いは、道路等の地面下に雨水貯留施設を設けておき、多量の降雨が発生した際には、側溝や排水溝を通じて雨水をこの雨水貯留施設に一旦、貯留しておくことが行われている。   Rainwater that falls on residential areas and roads is discharged into rivers through side ditches and drainage grooves with little penetration into the ground. However, if a large amount of rainfall occurs in a short time, such as torrential rain, Flooding causes traffic paralysis. For this reason, rainwater storage facilities have been provided under the ground such as parks, parking lots, or roads from the past, and when a large amount of rainfall occurs, rainwater is temporarily returned to this rainwater storage facility through side grooves and drainage grooves. It is done to store.

このような雨水貯留施設としては、例えば、特許文献1に記載されているように、地面を掘り下げることによって形成した貯水凹部内に、雨水を貯留する内部空間を有する樹脂製のブロック体を縦横に敷設すると共に複数段に積み重ねることによって貯水槽を形成すると共に、この貯水槽をシート材や舗装材等の積層被覆材によって被覆してなる構造を有し、側溝や排水溝内に流入した雨水を雨水導入管を通じて上記貯水槽に貯水するように構成している。   As such a rainwater storage facility, for example, as described in Patent Document 1, a resin block body having an internal space for storing rainwater in a water storage recess formed by digging the ground vertically and horizontally. A water storage tank is formed by laying and stacking in multiple stages, and this water storage tank is covered with a laminated covering material such as a sheet material or a paving material. It is configured to store water in the water storage tank through the rainwater introduction pipe.

さらに、雨水が貯水槽内に貯留中に、雨水に含まれている砂利や泥土等が沈降して槽底上に堆積するので、その堆積状態を確認したり、貯水槽内の状態や貯水された雨水の水位等を点検するための点検口(マンホール)を配設しているが、このような点検口としては、点検口を設けたい貯水槽内の一部に、その箇所の縦一列の積層ブロック体を排除することによって縦孔を設け、この縦孔内に複数個のコンクリート製のリングを積み重ねることによって形成している。   Furthermore, while rainwater is stored in the water tank, gravel or mud contained in the rainwater settles and accumulates on the tank bottom. There is an inspection port (manhole) for checking the level of rainwater, etc. As such an inspection port, a part of the water tank where the inspection port is to be installed A vertical hole is provided by eliminating the laminated block body, and a plurality of concrete rings are stacked in the vertical hole.

特開2000−160606号公報JP 2000-160606 A

しかしながら、貯水槽を構成しているブロック体は、通常、コンクリートよりも軽量な合成樹脂成形品からなる一方、コンクリート製の点検口は重量が極めて大きいので、ブロック体を多列、多段に積層してなる貯水槽内に上記コンクリート製の点検口を形成する場合には、軽量なブロック体を支持している貯水槽の底部とは別に点検口を設置すべき貯水槽の底部に、該点検口を支持できる強度を有する基礎を設けたり、沈下防止のための地盤改良等を必要とし、さらに、このようなコンクリート製の点検口では点検口周囲の貯水槽の内部を点検口内から点検するための開口部の形成に制約を受けて十分な点検が行えなくなるといった問題点がある。   However, the block bodies constituting the water storage tank are usually made of synthetic resin molded products that are lighter than concrete, while the concrete inspection ports are extremely heavy, so the block bodies are laminated in multiple rows and multiple stages. When the above-mentioned concrete inspection port is formed in the water tank, the inspection port is provided at the bottom of the water tank where the inspection port should be installed separately from the bottom of the water tank supporting the lightweight block body. In order to inspect the interior of the water tank around the inspection port from inside the inspection port, it is necessary to provide a foundation with sufficient strength to support the ground, improve the ground to prevent settlement, etc. There is a problem that sufficient inspection cannot be performed due to restrictions on the formation of the opening.

また、貯水槽内に点検口を施工する手順として、上記のように、点検口を設けたい貯水槽内の一部に、その箇所の縦一列の積層ブロック体を排除することによって縦孔を設け、この縦孔内に複数個のコンクリート製のリングを積み重ねることによって形成した場合、一度、組み上げたブロック体の一部を排除することは著しい手間と労力を要して工期が長くなる。このため、まず、地面を掘り下げることによって形成した貯水凹部内の所定位置に基礎を施工して該基礎上に上記コンクリート製の点検口を設置した後、該貯水凹部内に上記樹脂製のブロック体を多列、多段に敷設、積載することによって貯水槽を構築する方法も考えられるが、この方法も施工が煩雑化して手間を要するといった問題点がある。   In addition, as a procedure for constructing the inspection port in the water tank, as described above, a vertical hole is provided in a part of the water tank where the inspection port is to be provided by eliminating the one-layer stacked block body at that location. When a plurality of concrete rings are stacked in the vertical hole, removing a part of the assembled block body once requires a lot of labor and labor, resulting in a long construction period. For this reason, first, after constructing a foundation at a predetermined position in a water storage recess formed by digging the ground and installing the concrete inspection port on the foundation, the resin block body in the water storage recess Although a method of constructing a water storage tank by laying and loading a plurality of rows in multiple rows and stages is also conceivable, this method also has a problem that the construction becomes complicated and requires labor.

さらに、このような問題点を解消するために、予め、ステンレス製のアングル材を複数本、組み合わせて溶接することにより直方体形状の点検用開口枠を形成しておく一方、上記貯水凹部内に多数個の樹脂製ブロック体を多列、多段に敷設、積載することによって貯水槽を構築する際に、その一部にブロック体が積層されていない平面矩形状の空間部を設けておき、この空間部内に上記点検用開口枠を挿入、設置することも考えられるが、組み立てた直方体形状の点検用開口枠が重量が大で、高さも比較的高いために、運搬や取り扱いが困難であるばかりでなく、人手によって上記空間部内にこの点検用開口枠を挿入、設置することができず、重機で吊り上げて設置する必要が生じて上記同様に施工が煩雑化し工費が嵩む等の問題点が生じることになる。   Further, in order to solve such a problem, a rectangular parallelepiped-shaped inspection opening frame is formed in advance by welding a plurality of stainless steel angle members in combination. When constructing a water storage tank by laying and stacking individual resin block bodies in multiple rows and stages, a plane rectangular space portion in which block bodies are not laminated is provided in a part of the water tank. It is conceivable to insert and install the above inspection opening frame in the part, but the assembled rectangular parallelepiped inspection opening frame is heavy and relatively high in height, which makes it difficult to carry and handle. In addition, the inspection opening frame cannot be manually inserted and installed in the space portion, and it is necessary to lift and install the inspection opening frame with heavy equipment, resulting in problems such as complicated construction and increased construction costs. It becomes door.

その上、上記点検口はいずれも、ブロック体とは別体にしてブロック体に連結することなく貯水槽の一部に設けている縦孔内や空間部内に設置されているため、この点検口に上載荷重等の鉛直荷重が作用すると、この点検口を支持している貯水槽の底面にその荷重がこの点検口を介して直接伝達することになり、点検口を支持している貯水槽の底面がその荷重によって部分的に沈下する等の不具合が生じる虞れがあった。   In addition, all of the inspection ports are installed in vertical holes or spaces provided in a part of the water tank without being connected to the block body separately from the block body. When a vertical load such as an overload is applied to the tank, the load is directly transmitted to the bottom surface of the water tank supporting the inspection port through the inspection port. There is a possibility that problems such as the bottom surface partially sinking due to the load may occur.

本発明は上記のような問題点に鑑みてなされたもので、その目的とするところは、運搬や取扱いが容易であると共に、施工時には貯水槽の一部に設けている空間部内に、人手によって簡単且つ正確に組み立てることができ、その上、上載荷重等の鉛直方向の荷重が作用しても貯水槽の底面に全ての荷重を直接伝達させることなく周囲に分散、支持させることができて、貯水槽における点検口設置面に特別の基礎を施工したり地盤改良を行う必要をなくすことができると共に、内部からの貯水槽の点検も全面に亘って明確に行える雨水貯留施設における点検口の構造を提供するにある。   The present invention has been made in view of the problems as described above, and its purpose is that it is easy to transport and handle, and is manually placed in a space provided in a part of the water storage tank during construction. It can be assembled easily and accurately, and even if a vertical load such as an overload is applied, it can be dispersed and supported in the surroundings without transmitting all the load directly to the bottom of the water tank. The structure of the inspection port in the rainwater storage facility that eliminates the need to construct a special foundation or improve the ground on the installation surface of the storage tank and also allows clear inspection of the water tank from the inside. To provide.

上記目的を達成するために、本発明の雨水貯留施設における点検口の構造は、請求項1に記載したように、地面を掘削することにより形成した貯水凹部内に雨水を貯留する内部空間を有する雨水貯留ユニット部材を縦横に敷設すると共に複数段に積み重ねることによって貯水槽を形成し、この貯水槽の上面を被覆材によって被覆すると共に貯水槽に外部から雨水を導入するための雨水導入管を設けてあり、さらに、上記貯水槽の一部に雨水貯留ユニット部材を配設していない平面矩形状の空間部を該貯水槽の全高に亘って設けてこの空間部内に点検口を配設し、地表から上記被覆材を貫通してこの点検口に連通する人孔を設けてなる雨水貯留施設において、上記点検口は、上記空間部内に上下方向に所定間隔毎に配設している複数個の矩形枠からなり、各矩形枠の縁辺部をその高さ位置に配設している雨水貯留ユニット部材の縁辺部に支持させていると共に、矩形枠の四方の内隅部に沿って上記空間部内に支柱を挿入してこれらの支柱に矩形枠の四隅部をボルトによって連結していることを特徴とする。 In order to achieve the above object, the structure of the inspection port in the rainwater storage facility according to the present invention has an internal space for storing rainwater in a water storage recess formed by excavating the ground as described in claim 1. Rainwater storage unit members are laid vertically and horizontally and stacked in multiple stages to form a water tank. The upper surface of the water tank is covered with a covering material and a rainwater introduction pipe is provided for introducing rainwater from the outside to the water tank. In addition, a plane rectangular space not provided with a rainwater storage unit member in a part of the water tank is provided over the entire height of the water tank, and an inspection port is provided in the space. In a rainwater storage facility provided with a human hole that penetrates the covering material from the ground surface and communicates with the inspection port, the inspection port is provided in a plurality of intervals arranged in the vertical direction at predetermined intervals. Rectangular frame Rannahli, strut edge portion of the rectangular frame with and is supported on the edge portion of the rainwater storage unit member that is disposed in its height position, in the space portion along the inner corner of the square of the rectangular frame The four corners of the rectangular frame are connected to these columns by bolts .

請求項に係る発明は、点検口を構成する上記矩形枠は四本の枠材を組み合わせて、点検口を設置するための平面矩形状の空間部内に挿入可能な大きさの矩形枠状に形成していると共に互いに平行な2組の枠材のうち、一組の枠材にのみ外側面に雨水貯留ユニット部材の縁辺部上に受止させる一定幅を有する水平フランジ部を突設していることを特徴とする。 In the invention according to claim 2 , the rectangular frame constituting the inspection port is formed by combining four frame members into a rectangular frame shape having a size that can be inserted into a planar rectangular space for installing the inspection port. Of the two sets of frame members that are formed and parallel to each other, only one set of frame members is provided with a horizontal flange portion having a fixed width that is received on the edge of the rainwater storage unit member on the outer surface. It is characterized by being.

さらに、請求項に係る発明は、上記請求項に記載の発明において、水平フランジ部を有する枠材を山形鋼から形成してあり、この山形鋼の一方の辺を水平フランジ部としていることを特徴とし、請求項に係る発明は、上記矩形枠における互いに直角に連結している枠材の対向する端部間に足場兼用補強フレームを固着していることを特徴とする。 Furthermore, the invention according to claim 3 is the invention according to claim 2 , wherein the frame member having the horizontal flange portion is formed from angle steel, and one side of the angle steel is used as the horizontal flange portion. The invention according to claim 4 is characterized in that a reinforcing frame serving as a scaffold is fixed between opposing ends of the frame members connected at right angles to each other in the rectangular frame.

また、請求項に係る発明は、上記支柱を山形鋼から形成してあり、その辺に長さ方向に所定間隔毎に矩形枠の隅部に設けている螺子孔に螺着させるボルト取付孔を穿設していることを特徴とし、請求項に係る発明は、隣接する支柱の内面間に筋交いを装着していることを特徴とする。 According to a fifth aspect of the present invention, there is provided a bolt mounting hole in which the support column is formed of angle steel and is screwed into a screw hole provided at a corner of the rectangular frame at predetermined intervals in the length direction. The invention according to claim 6 is characterized in that a brace is mounted between the inner surfaces of adjacent struts.

請求項1に記載の発明によれば、貯水槽の一部に設けている平面矩形状の空間部内に設置する点検口は、この空間部内に上下方向に所定間隔毎に配設している複数個の矩形枠からなるので、施工現場への運搬時においては、これらの複数個の矩形枠を積み重ねた状態にして嵩張ることなく容易に運搬することができるのは勿論、施工現場において点検口を組み立てる際には、重機などを使用することなく人手によって矩形枠を一個宛、上記空間部内に順次、容易に挿入することができて工費の低減を図ることができると共に、これらの矩形枠の互いに平行な縁辺部をその高さ位置に配設している雨水貯留ユニット部材の縁辺部に支持させることによって空間部の下部から上部に向かって所定間隔毎に矩形枠を所定の高さ位置に簡単且つ正確に配設することができる。   According to the first aspect of the present invention, the inspection ports installed in the planar rectangular space provided in a part of the water storage tank are arranged at predetermined intervals in the vertical direction in the space. Since it consists of individual rectangular frames, when transporting to the construction site, these rectangular frames can be easily transported in a stacked state without being bulky. When assembling, one rectangular frame can be addressed by hand without using heavy machinery, etc., and can be easily and sequentially inserted into the space to reduce the construction cost. By supporting the parallel edge on the edge of the rainwater storage unit member arranged at the height position, the rectangular frame can be easily set at a predetermined height position from the lower part of the space part toward the upper part. And exactly It can be set.

その上、このように組み立てられた点検口は、各矩形枠をその周囲の雨水貯留ユニット部材の縁辺部に支持させているので、この点検口に上載荷重等の鉛直荷重が作用してもその荷重を矩形枠を介してその周囲の雨水貯留ユニット部材に分散させることができ、従って、点検口の底部に特別の基礎や地盤改良を行う必要をなくすることができ、コストの削減と共に工期の短縮を図ることができる。また、このように構成した点検口によれば、上下に隣接する矩形枠間を四方に向かって大きく開口させているから、この開口部を通じて貯水槽を構成している四方の雨水貯留ユニット部材を広い範囲に亘って明確に確認することができる。   In addition, since the inspection port assembled in this manner supports each rectangular frame on the edge of the surrounding rainwater storage unit member, even if a vertical load such as an overload acts on the inspection port, The load can be distributed to the surrounding rainwater storage unit members via the rectangular frame, and therefore, it is possible to eliminate the need for special foundation and ground improvement at the bottom of the inspection port. Shortening can be achieved. Further, according to the inspection port configured in this way, since the rectangular frames adjacent to each other in the upper and lower directions are greatly opened toward the four directions, the four rainwater storage unit members constituting the water storage tank through the openings are provided. It can be clearly confirmed over a wide range.

さらに、本発明によれば、上記空間部内に上下方向に所定間隔毎に配設している矩形枠の四方の内隅部に沿って支柱を挿入してあり、これらの支柱に矩形枠の四隅部をボルトによって連結しているので、空間部内から矩形枠に対する支柱のボルトによる連結作業を行うことによって簡単に直方体形状の開口枠からなる点検口を組み立てることができ、このように構成した点検口に上載荷重等の鉛直荷重が作用しても、支柱から各矩形枠を介してこれらの矩形枠を支持している雨水貯留ユニット部材にそれぞれ分散受止させることができ、貯水槽の底部に掛かる荷重を小さくすることができて上述したように基礎や地盤改良を不要にすることができる。 Furthermore, according to the present invention , struts are inserted along the four inner corners of the rectangular frame disposed at predetermined intervals in the vertical direction in the space, and the four corners of the rectangular frame are inserted into these struts. Since the parts are connected by bolts, an inspection port composed of a rectangular parallelepiped opening frame can be easily assembled by performing the connection work of the column bolts to the rectangular frame from the inside of the space, and the inspection port configured in this way Even when a vertical load such as an overload is applied to the rainwater, the rainwater storage unit member supporting these rectangular frames can be dispersed and received from the support via the rectangular frames, and the suspension is applied to the bottom of the water tank. The load can be reduced and the foundation and ground improvement can be eliminated as described above.

また、請求項に係る発明によれば、点検口を構成する上記矩形枠を、点検口を設置するための平面矩形状の空間部内に挿入可能な大きさに形成していると共にこの矩形枠を形成する4本の枠材における互いに平行な2組の枠材のうちの一組の枠材にのみ外側面に雨水貯留ユニット部材の縁辺部上に受止させる一定幅を有する水平フランジ部を突設しているので、点検口の施工時には、この水平フランジ部を突設している互いに平行な枠材を挿入方向に向けた状態となるように矩形枠を傾斜させて、その一方の枠材から点検口を施工すべき上記平面矩形状の空間部内に挿入することにより、水平フランジ部が空間部内に向かって面している雨水貯留ユニット部材の縁辺に引っ掛かることなく矩形枠を空間部内に円滑に挿入することができ、所定の位置まで挿入したのち、下傾端側の枠材の水平フランジ部をこの枠材に対向する雨水貯留ユニット部材の縁辺上に係止させ、この係止部を支点として上傾端側の枠材を該雨水貯留ユニット部材の高さ位置まで降下させてその水平フランジ部を対向する雨水貯留ユニット部材縁辺上に係止させることにより、矩形枠を空間部内における所定の高さ位置で、対向する雨水貯留ユニット部材間に安定した架設状態に簡単に設置することができる。 According to the second aspect of the invention, the rectangular frame constituting the inspection port is formed in a size that can be inserted into a planar rectangular space for installing the inspection port, and the rectangular frame. A horizontal flange portion having a certain width to be received on the edge portion of the rainwater storage unit member only on the outer surface of only one set of the two frame members parallel to each other in the four frame members forming When projecting the inspection port, the rectangular frame is inclined so that the parallel frame members projecting the horizontal flange portions face in the insertion direction, and one of the frames is installed. By inserting the inspection port from the material into the flat rectangular space, the rectangular frame can be inserted into the space without being caught by the edge of the rainwater storage unit member facing the horizontal flange. Can be inserted smoothly, After that, the horizontal flange portion of the frame member on the tilted end side is locked on the edge of the rainwater storage unit member facing this frame member, and the frame on the tilted end side is used with this locking portion as a fulcrum. The material is lowered to the height position of the rainwater storage unit member , and the horizontal flange portion is locked on the edge of the opposite rainwater storage unit member , so that the rectangular frame is opposed at a predetermined height position in the space portion. It can be easily installed in a stable construction state between the rainwater storage unit members.

請求項に係る発明によれば、矩形枠における水平フランジ部を有する上記枠材は山形鋼からなり、この山形鋼の一方の辺を水平フランジ部としているので、別に水平フランジ部を形成することなく、山形鋼を使用して水平フランジ部を有する枠材を簡単に作製することができる。 According to the invention of claim 3 , the frame member having the horizontal flange portion in the rectangular frame is made of angle steel, and one side of the angle steel is used as the horizontal flange portion, so that the horizontal flange portion is formed separately. In addition, a frame material having a horizontal flange portion can be easily produced using angle steel.

請求項に係る発明によれば、上記矩形枠における互いに直角に連結している枠材の対向する端部間に足場兼用補強フレームを固着しているので、この足場兼用補強フレームによって矩形枠が強固に補強されて歪み等の変形が生じがたいのは勿論、これらの矩形枠を上下に所定間隔毎に配設することによって点検口を構成しているので、足場兼用補強フレームが梯子の役目を発揮して点検口内への昇降が容易に行えることができ、貯水槽内の点検作業が円滑に且つ確実に行うことができる。 According to the fourth aspect of the present invention, the scaffold / reinforcement frame is fixed between the opposing ends of the frame members connected at right angles to each other in the rectangular frame. Of course, these rectangular frames are arranged at predetermined intervals up and down at predetermined intervals, so that the reinforcement frame is used as a ladder. Can be easily moved up and down into the inspection port, and the inspection work in the water tank can be performed smoothly and reliably.

さらに、請求項に係る発明によれば、矩形枠と共に点検口を構成している上記支柱は山形鋼からなり、その辺に長さ方向に所定間隔毎に矩形枠の隅部に設けている螺子孔に螺着させるボルト取付孔を穿設しているので、貯水槽の一部に設けている上記空間部内に矩形枠を上下方向に所定間隔毎に配設したのち、矩形枠の内隅部に沿ってこの支柱を挿入して点検口を構成する際に、矩形枠の四隅部に設けている上記足場兼用補強フレームを足場として空間部内から矩形枠と支柱とのボルトによる連結作業が位置決めをすることなく容易に行うことができる。 Furthermore, according to the invention which concerns on Claim 5 , the said support | pillar which comprises the inspection port with a rectangular frame consists of angle steel, and it has provided in the corner | angular part of the rectangular frame at predetermined intervals in the length direction on the edge. Since the bolt mounting holes to be screwed into the screw holes are drilled, the rectangular frame is disposed in the space provided in a part of the water storage tank in the vertical direction at predetermined intervals, and then the inner corner of the rectangular frame is When the inspection port is constructed by inserting the support along the part, the connecting work by the bolts of the rectangular frame and the support from the space part is positioned from the inside of the space using the scaffold / reinforcement frame provided at the four corners of the rectangular frame as a scaffold. It can be done easily without doing.

また、請求項に係る発明によれば、点検口における隣接する支柱の内面間に筋交いを装着しているので、耐震性に優れた強固な点検口を構成することができる。 Moreover, according to the invention which concerns on Claim 6 , since the bracing is mounted | worn between the inner surfaces of the adjacent support | pillar in an inspection opening, the firm inspection opening excellent in earthquake resistance can be comprised.

点検口を備えた雨水貯留施設の簡略縦断側面図。The simplified longitudinal side view of the rainwater storage facility provided with the inspection port. その簡略平面図。The simplified plan view. 拡大縦断側面図。FIG. 点検口の一部の拡大斜視図。The expansion perspective view of a part of inspection port. 点検口を形成する矩形枠と支柱との分解斜視図。The disassembled perspective view of the rectangular frame and support | pillar which form an inspection port. 空間部内に矩形枠を配設した状態の簡略縦断面図。The simplified longitudinal cross-sectional view of the state which has arrange | positioned the rectangular frame in the space part. 矩形枠と支柱とを連結して点検口を形成した状態の簡略縦断面図。The simplified longitudinal cross-sectional view of the state which connected the rectangular frame and the support | pillar and formed the inspection port. この点検口を下から見た場合の一部切欠裏面図。The partially cutaway back view when this inspection port is viewed from below. 点検口の上部の拡大縦断面図。The enlarged longitudinal cross-sectional view of the upper part of an inspection port. 雨水貯留ユニット部材の斜視図。The perspective view of a rainwater storage unit member. 上下に重ね合わせた雨水貯留ユニット部材の縦断面図。The longitudinal cross-sectional view of the rainwater storage unit member piled up and down. 点検口を備えた別な構造を有する雨水貯留施設の一部の縦断面図。The longitudinal cross-sectional view of a part of rainwater storage facility which has another structure provided with the inspection port.

次に、本発明の具体的な実施の形態を図面について説明すると、図1〜図3において、雨水貯留施設は、公園等の地面を所定深さ、掘り下げることによって平面長方形状の貯水凹部2を形成すると共にこの貯水凹部2内に雨水を貯留する内部空間を有する平面矩形状で一定厚みを有する合成樹脂製の雨水貯留ユニット部材3を縦横に敷き並べると共に多段に積載することによって形成してなる貯水槽1と、この貯水槽1の上面を被覆した被覆材4と、貯水槽1内の一部にこの貯水槽1の内底面から上端までの全高に亘って雨水貯留ユニット部材3が配設されていない平面矩形状の空間部5を設け、この空間部5内に配設している点検口6と、地表から上記被覆材4を貫通して点検口6の上端開口部に連通している人孔9と、貯水槽1の一端部側に配管されて雨水を貯水槽1外から貯水槽1内に導入する雨水導入管10とから構成されている。   Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 3, the rainwater storage facility creates a rectangular rectangular water storage recess 2 by digging a predetermined depth of the ground such as a park. It is formed by laying the rainwater storage unit members 3 made of synthetic resin having a flat rectangular shape having a constant thickness in the water storage recess 2 and having a constant thickness in a horizontal and vertical direction and stacked in multiple stages. A storm water storage unit member 3 is disposed over the entire height from the inner bottom surface to the upper end of the water tank 1 in a part of the water tank 1, a covering material 4 that covers the upper surface of the water tank 1, and the water tank 1. A flat rectangular space portion 5 is provided, and the inspection port 6 disposed in the space portion 5 is connected to the upper end opening of the inspection port 6 through the covering material 4 from the ground surface. Person hole 9 and one end of water tank 1 And a rainwater inlet pipe 10 for introducing the outside water storage tank 1 rainwater is piped to the water tank 1 in.

このように構成している雨水貯留施設の構造をさらに詳述すると、上記貯水凹部2の底面を平坦な水平面に形成したのち、この貯水凹部2の底面から四方の掘削壁面全面に亘って遮水シート11を被覆し、この遮水シート11によって被覆されている貯水凹部2内に上記雨水貯留ユニット部材3を多列、多段に配設することによって貯水槽1を形成してあり、さらに、貯水槽1における他端部側の下端部に貯水槽1内の雨水を外部に排出するための雨水導出管16を連通させている。なお、上記遮水シート11に代えて透水シートを敷設してもよい。   The structure of the rainwater storage facility constructed as described above will be described in more detail. After the bottom surface of the water storage recess 2 is formed on a flat horizontal surface, the water is shielded from the bottom surface of the water storage recess 2 to the entire surface of the four excavation walls. A water storage tank 1 is formed by covering the sheet 11 and arranging the rainwater storage unit members 3 in multiple rows and multiple stages in the water storage recess 2 covered by the water shielding sheet 11. A rainwater lead-out pipe 16 for discharging rainwater in the water storage tank 1 to the outside is communicated with a lower end portion on the other end side of the tank 1. A water permeable sheet may be laid instead of the water shielding sheet 11.

貯水槽1を構成する上記雨水貯留ユニット部材3としては、例えば、図10、図11に示すように、平面矩形状の底板部31に、下端がこの底板部31から下方に全面的に開口している一定高さの截頭角錐形状の中空突部32を4個以上、偶数個、底板部31の互いに平行な一方の縁辺間に亘って連続させた状態で直列状に突設すると共にこの中空突部列を複数列、互いに平行な他方の縁辺間方向に一定間隔毎に突設してあり、さらに、全ての中空突部32の上端面に平面矩形形状の小さな突出頂部32a を突設していると共に各隣接する2個を一組とする中空突部32、32の突出頂部32a 、32a の外側壁面間の間隔を中空突部32の下端開口部の開口幅に等しくなるように形成していて、雨水貯留ユニット部材3を互いにその中空突部列を順次直交するように向きをかえながら上下方向に積載した際に、上段側の中空突部32の下端開口部に、この開口部に対応する下段側の各中空突部列における隣接する2個の中空突部32、32の突出頂部32a 、32a が嵌合、係止し、上段側の中空突部32の下端面が下段の雨水貯留ユニット部材3の中空突部32の上面に支持させた状態にして正確に且つ確実に積み重ねられるように構成している。   As the rainwater storage unit member 3 constituting the water storage tank 1, for example, as shown in FIGS. 10 and 11, a bottom plate portion 31 having a flat rectangular shape has a lower end opened entirely from the bottom plate portion 31 downward. 4 or more, and even number of hollow projections 32 of a fixed truncated pyramid shape of a certain height are projected in series in a state of being continuous across one edge of the bottom plate 31 parallel to each other. Multiple rows of hollow projections are projected at regular intervals in the direction between the other edges parallel to each other, and a small projection top 32a having a planar rectangular shape is projected on the upper end surface of all the hollow projections 32. And the distance between the outer wall surfaces of the projecting apexes 32a and 32a of the hollow protrusions 32 and 32, which are adjacent to each other as a set, is formed to be equal to the opening width of the lower end opening of the hollow protrusion 32. The rainwater storage unit members 3 are turned so that their rows of hollow protrusions are orthogonal to each other. When stacked in the vertical direction, the two lower hollow protrusions 32 and 32 protrude from the lower end opening of the upper hollow protrusion 32 at the lower hollow protrusion row corresponding to the opening. Accurate and reliable stacking with the top portions 32a and 32a fitted and locked so that the lower end surface of the upper hollow projection 32 is supported on the upper surface of the hollow projection 32 of the lower rainwater storage unit member 3. It is configured to be.

さらに、全ての中空突部32における突出頂部32a には、中空突部32内に連通する数個の通水孔33が穿設されていると共に隣接する中空突部32、32間の谷部を一定幅を有する真っ直ぐな凹溝からなる貯水空間部34に形成してあり、また、底板部31の四方の縁辺における少なくとも互いに平行に対応する一組の縁辺部35、35を中空突部32の下端から一定幅、外側に突出させている。なお、この突出縁辺部35は、底板部31の四辺に形成しておいてもよい。   Further, the projecting top portions 32a of all the hollow projections 32 are provided with several water passage holes 33 communicating with the inside of the hollow projections 32, and the valleys between the adjacent hollow projections 32, 32 are formed. It is formed in a water storage space portion 34 composed of straight concave grooves having a constant width, and at least one pair of edge portions 35 and 35 corresponding to each other in parallel on the four sides of the bottom plate portion 31 is formed on the hollow protrusion 32. It protrudes outward from the bottom by a certain width. The projecting edge portion 35 may be formed on the four sides of the bottom plate portion 31.

このように構成した雨水貯留ユニット部材3を多数個、まず、貯水凹部2の底面に敷設している遮水シート11上に全ての雨水貯留ユニット部材3をその中空突部32が互いに直列状に連なるように貯水凹部2の全面に亘って縦横に設置して一段目の雨水貯留ユニット部材列を形成する。この際、この雨水貯留ユニット部材列の一部に、例えば、貯水凹部2の長さ方向の両側中央部の2箇所に、雨水貯留ユニット部材3が設けていない空間部5a、5aを設ける。この空間部5aは雨水貯留ユニット部材一個分に相当する広さ(1000mm角程度)に形成されている。   A large number of rainwater storage unit members 3 configured in this way, first, all the rainwater storage unit members 3 are arranged in series with each other on the water shielding sheet 11 laid on the bottom surface of the water storage recess 2. It is installed vertically and horizontally over the entire surface of the water storage recess 2 so as to be continuous to form a first-stage rainwater storage unit member row. At this time, space portions 5a and 5a where the rainwater storage unit member 3 is not provided are provided in a part of the rainwater storage unit member row, for example, at two locations on both sides in the longitudinal direction of the water storage recess 2. The space 5a is formed to have a width (about 1000 mm square) corresponding to one rainwater storage unit member.

同様にして、この一段目の雨水貯留ユニット部材列の全ての雨水貯留ユニット部材3上に、二段目となる多数個の雨水貯留ユニット部材3を、順次、その中空突部列を下段の雨水貯留ユニット部材3の中空突部列に直交するように重ね合わせて、その中空突部32の下端開口部をこの下端開口部に対応する下段の雨水貯留ユニット部材3の中空突部列における2個の中空突部32、32を一組とする複数組の中空突部32、32突出頂部32a 、32a に被嵌させることにより、二段目の雨水貯留ユニット部材列を形成する。この際、この二段目の雨水貯留ユニット部材列にも一段目の雨水貯留ユニット部材列における上記雨水貯留ユニット部材3が設けられていない空間部5a上に同じくこの空間部に重なるように連通した雨水貯留ユニット部材3を設けていない空間部5aを形成する。   Similarly, a large number of second-stage rainwater storage unit members 3 are sequentially placed on all the rainwater storage unit members 3 in the first-stage rainwater storage unit member row, and the hollow projections are sequentially placed on the lower-stage rainwater. Two pieces in the hollow protrusion row of the rainwater storage unit member 3 in the lower stage corresponding to the lower end opening are overlapped so as to be orthogonal to the hollow protrusion row of the storage unit member 3. A second-stage rainwater storage unit member row is formed by fitting a plurality of sets of hollow protrusions 32, 32 with the hollow protrusions 32, 32 as a set to projecting top portions 32a, 32a. At this time, the second-stage rainwater storage unit member row was also communicated so as to overlap this space portion on the space portion 5a where the rainwater storage unit member 3 in the first-stage rainwater storage unit member row is not provided. A space 5a where the rainwater storage unit member 3 is not provided is formed.

このように、下段の雨水貯留ユニット部材3上に上段の雨水貯留ユニット部材3を互いにその中空突部列を直角にして重ね合わせ、且つ、これらの雨水貯留ユニット部材列の一部に雨水貯留ユニット部材3が設けられていない矩形状の空間部5aを形成してながら貯水凹部2の上端近傍部にまで多数段、積み重ねることによりその一部に貯水凹部2の底面に敷設している遮水シート11の上面から貯水凹部2の上端近傍部までの全高に至るまで、雨水貯留ユニット部材3が設けられていない平面矩形状の空間部5、5を有する貯水槽1を築造する。   In this way, the upper rainwater storage unit member 3 is superposed on the lower rainwater storage unit member 3 so that the hollow protrusion rows thereof are perpendicular to each other, and the rainwater storage unit member part of these rainwater storage unit member rows is overlapped. A water-impervious sheet that is laid on the bottom surface of the water storage recess 2 by forming a plurality of layers up to the vicinity of the upper end of the water storage recess 2 while forming a rectangular space 5a where no member 3 is provided. From the upper surface of 11 to the total height from the upper end vicinity of the water storage recess 2, the water storage tank 1 having the planar rectangular spaces 5, 5 where the rainwater storage unit member 3 is not provided is constructed.

しかるのち、この貯水槽1における上記空間部5内に直方体形状の開口枠からなる点検口6を配設している。この点検口6は空間部6内に上下方向に所定間隔毎に、例えば、上記雨水貯留ユニット部材3の厚み寸法に等しい間隔毎に配設された複数個の矩形枠7と、これらの矩形枠7の四方の内隅部内を通じて上下方向に挿入している4本の支柱8とからなり、矩形枠7の少なくとも互いに平行な一組の枠材7a、7aに外側に向かって一定幅を有する水平フランジ部7a1 を突設し、これらの枠材7a、7aの水平フランジ部7a1 、7a1 を上記空間部5内に露出している雨水貯留ユニット部材3、3の上記突出縁辺部35、35上に受止させている。   After that, an inspection port 6 composed of a rectangular parallelepiped opening frame is disposed in the space 5 in the water storage tank 1. The inspection port 6 has a plurality of rectangular frames 7 arranged in the space 6 at predetermined intervals in the vertical direction, for example, at intervals equal to the thickness dimension of the rainwater storage unit member 3, and these rectangular frames. 7 is composed of four struts 8 inserted vertically through the inner corners of four sides, and a horizontal frame having a constant width toward the outside of a pair of frame members 7a, 7a parallel to each other of the rectangular frame 7. A flange portion 7a1 is projected, and the horizontal flange portions 7a1 and 7a1 of these frame members 7a and 7a are exposed on the protruding edge portions 35 and 35 of the rainwater storage unit members 3 and 3 exposed in the space portion 5. I'm accepting it.

矩形枠7は上記互い平行な一方の2本の枠材7a、7aと、この枠材7aに直角に連なる互いに平行な他方の2本の枠材7b、7bとの4本の枠材を矩形状に組み合わせて直角に接合する端部を溶接等によって一体に連結することによって形成されているが、図4、図5に示すように、一方の組の枠材7a、7aは一定長さの山形鋼からなり、他方の組の枠材7b、7bは断面矩形状の一定長さの中空鋼材からなり、山形鋼からなる枠材7a、7aは、その一方の辺の両端部背面を中空鋼材からなる枠材7bの端面に接合させて一体に溶接することにより、この一方の辺の上端から外方に向かって水平状に突出する他方の辺によって上記水平フランジ部7a1 を形成している。   The rectangular frame 7 is a rectangular frame consisting of the above-mentioned two frame members 7a, 7a parallel to each other and the other two frame members 7b, 7b parallel to each other at right angles to the frame member 7a. The ends joined at right angles in combination with the shape are integrally connected by welding or the like, but as shown in FIGS. 4 and 5, one set of frame members 7a, 7a has a certain length. The other pair of frame members 7b and 7b is made of a hollow steel material of a fixed length with a rectangular cross section, and the frame members 7a and 7a made of angle steel are hollow steel materials with the backs of both ends of one side thereof. The horizontal flange portion 7a1 is formed by the other side projecting horizontally from the upper end of the one side to the end surface of the frame member 7b.

さらに、この矩形枠7における他方の互いに平行に組み合わされた上記中空鋼材からなる枠材7b、7bの外側の面間の寸法を上記空間部5の開口幅よりも僅かに小さい寸法に形成しているが、一方の互いに平行に組み合わされている山形鋼からなる枠材7a、7aは、その水平フランジ部7a1 の幅に相当する長さだけ、これらの枠材7a、7aにおける水平フランジ部7a1 、7a1 の先端間の寸法を上記空間部5の開口幅よりも大きくなるように形成している。   Furthermore, the dimension between the outer surfaces of the other frame material 7b, 7b made of the hollow steel material combined in parallel with each other in the rectangular frame 7 is formed to be slightly smaller than the opening width of the space portion 5. However, one of the frame members 7a and 7a made of angle steel combined in parallel with each other has a length corresponding to the width of the horizontal flange portion 7a1, and the horizontal flange portions 7a1 and 7a1 in these frame members 7a and 7a, The dimension between the tips of 7a1 is formed to be larger than the opening width of the space 5.

このように構成した矩形枠7を空間部5内における所定高さ位置に設置するには、水平フランジ部7a1 を突設している枠材7a、7aを挿入方向に向けて一方の枠材7aから他方の枠材7aに向かって矩形枠7を傾斜させた状態とし、この状態にして矩形枠7を空間部5内に挿入し、その下傾端側の枠材7aが所定位置まで達すると、この枠材7aの水平フランジ部7a1 をこの枠材7aに対向する雨水貯留ユニット部材3の突出縁辺部35に引っ掛けるように係止させさせ、この係止部を支点として矩形枠7が水平状となるまで上傾端側の枠材7aを該雨水貯留ユニット部材3の高さ位置まで降下させてその水平フランジ部7a1 を上記一方の枠材7aの水平フランジ部7a1 を係止させている雨水貯留ユニット部材3の突出縁辺部35に対して平行に対向した雨水貯留ユニット部材3の突出縁辺部35上に係止させることにより、矩形枠7を空間部5内における所定の高さ位置に設置する。   In order to install the rectangular frame 7 configured as described above at a predetermined height position in the space portion 5, the frame material 7a, 7a projecting the horizontal flange portion 7a1 is directed in the insertion direction, and the one frame material 7a. When the rectangular frame 7 is inclined from the other frame member 7a toward the other frame member 7a, the rectangular frame 7 is inserted into the space 5 in this state, and the frame member 7a on the lower inclined end side reaches a predetermined position. The horizontal flange portion 7a1 of the frame member 7a is locked so as to be hooked on the protruding edge portion 35 of the rainwater storage unit member 3 facing the frame member 7a, and the rectangular frame 7 is formed horizontally with the locking portion as a fulcrum. The frame member 7a on the tilted end side is lowered to the height position of the rainwater storage unit member 3 until the horizontal flange portion 7a1 is locked to the horizontal flange portion 7a1 of the one frame member 7a. Rainwater storage unit member facing parallel to the projecting edge 35 of the storage unit member 3 By locking on to the protruding edge portion 35 of, placing a rectangular frame 7 at a predetermined height position in the space 5.

空間部5内へのこのような矩形枠7の配設は、複数個の矩形枠7を順次、空間部5の底部側から上方に向かって雨水貯留ユニット部材3の厚さ間隔毎に配設し、各矩形枠7における互いに平行な枠材7a、7aをそれぞれの高さ位置においてその縁辺部側の面を空間部5内に露出させている雨水貯留ユニット部材3、3の対向する縁辺部間に架設させた状態に設置することによって行われる。なお、多段に積み重ねてねる雨水貯留ユニット部材3の四方に突出縁辺部35を形成している場合には、空間部5内への矩形枠7の挿入方向をどの方向に向けてもよいが、互いに平行する一方の縁辺部を突出させ、互いに平行する他方の縁辺部を突出させていない雨水貯留ユニット部材3を上述したように互いに直角に向きをかえながら多段に積み重ねている場合には、図6等に示すように、空間部5内に臨む突出縁辺部35は、順次、空間部5の直角に連なる面に交互に現れるので、矩形枠7を順次、その空間部5内への挿入方向を直角方向に向きを変えて、その水平フランジ部7a1 を突出縁辺部35に係止させるようにする。   The rectangular frame 7 is arranged in the space 5 in such a manner that a plurality of rectangular frames 7 are sequentially arranged at every thickness interval of the rainwater storage unit member 3 from the bottom side of the space 5 upward. The opposite edge portions of the rainwater storage unit members 3 and 3 in which the frame members 7a and 7a parallel to each other in each rectangular frame 7 are exposed in the space portion 5 at the respective height positions. This is done by installing it in a state where it is installed between them. In addition, when the protruding edge part 35 is formed in the four directions of the rainwater storage unit member 3 that is stacked in multiple stages, the insertion direction of the rectangular frame 7 into the space part 5 may be directed in any direction. When the rainwater storage unit members 3 that project one edge part parallel to each other and do not project the other edge part parallel to each other are stacked in multiple stages while changing their directions at right angles as described above, As shown in FIG. 6 and the like, the projecting edge portions 35 facing the space portion 5 appear alternately on a surface that is continuous at a right angle of the space portion 5, so that the rectangular frames 7 are sequentially inserted into the space portion 5. The horizontal flange portion 7a1 is locked to the projecting edge portion 35 by changing the direction to a right angle direction.

矩形枠7における互いに平行な上記中空鋼材からなる枠材7b、7bの両端部には図5に示すように、矩形枠7の四隅部に位置する螺子孔7c、7cが設けられていると共に、互いに直角に連結している枠材7a、7bの直角に対向する端部内面間に足場兼用補強フレーム7dを固着している。一方、これらの矩形枠7における直角に連結した枠材7a、7bの端部と上記足場兼用補強フレーム7dとによって囲まれたいる四方の内隅部内を通じて上下方向に挿入している4本の支柱8は、長さが空間部5の深さに等しい長さを有する山形鋼からなり、その一方の辺に長さ方向に上記雨水貯留ユニット部材3の厚み間隔に等しい間隔毎にボルト取付孔8aを穿設している。   As shown in FIG. 5, screw holes 7 c and 7 c located at the four corners of the rectangular frame 7 are provided at both ends of the frame materials 7 b and 7 b made of the hollow steel material parallel to each other in the rectangular frame 7, A scaffolding and reinforcing frame 7d is fixed between inner surfaces of the frame members 7a and 7b that are connected at right angles to each other at right angles. On the other hand, four struts inserted in the vertical direction through the inner corners of the four sides surrounded by the ends of the frame members 7a and 7b connected at right angles in the rectangular frame 7 and the reinforcing frame 7d serving as a scaffold. 8 is made of angle steel having a length equal to the depth of the space portion 5, and bolt mounting holes 8 a are provided at intervals equal to the thickness interval of the rainwater storage unit member 3 in the length direction on one side thereof. Has been drilled.

この支柱8は、上記複数個の矩形枠7を、貯水槽1の一部に設けている上記空間部5内に雨水貯留ユニット部材3の厚み間隔毎に配設してその互いに平行な枠材7a、7aにおける水平フランジ部7a1 を対向する雨水貯留ユニット部材3の突出縁辺部35上に受止させた状態にして順次、空間部5の上端部まで設置したのち、図7〜図9に示すように、これらの矩形枠7の上記内隅部内を通じてその下端が空間部5の下端に露出している貯水槽1の底面に受止されるまで挿入され、各矩形枠7の四隅部に設けている上記螺子孔7cにボルト取付孔8aを合致させて、ボルト取付孔8aから螺子孔7cにボルト12を螺締することにより、四方の支柱8を囲むようにして複数個の矩形枠7を上下方向に所定間隔毎に支柱8に固着してなる直方体形状の点検口6を組み立てる。この際、矩形枠7と支柱8との連結作業は、先に空間部5内に配設した矩形枠7の足場兼補強フランジ7dを足場として容易に行うことができる。   This support | pillar 8 arrange | positions the said some rectangular frame 7 in the said space part 5 provided in a part of the water storage tank 1 for every thickness space | interval of the rainwater storage unit member 3, and the mutually parallel frame material 7a and 7a, the horizontal flange portion 7a1 in 7a, 7a is received on the protruding edge portion 35 of the facing rainwater storage unit member 3 and sequentially installed up to the upper end portion of the space portion 5, and then shown in FIGS. Thus, the rectangular frames 7 are inserted into the inner corners of the rectangular frame 7 until the lower ends thereof are received by the bottom surface of the water storage tank 1 exposed at the lower ends of the space parts 5, and provided at the four corners of the rectangular frames 7. The bolt mounting holes 8a are aligned with the screw holes 7c, and the bolts 12 are screwed into the screw holes 7c from the bolt mounting holes 8a, so that a plurality of rectangular frames 7 are vertically arranged so as to surround the four columns 8 Assembling a rectangular parallelepiped inspection port 6 fixed to the column 8 at predetermined intervals. That. At this time, the connecting operation of the rectangular frame 7 and the column 8 can be easily performed by using the scaffolding / reinforcing flange 7d of the rectangular frame 7 previously disposed in the space 5 as a scaffold.

なお、矩形枠7は雨水貯留ユニット部材3の厚さ間隔毎に配設することなく、雨水貯留ユニット部材3が比較的薄い場合には、2個の厚み分、或いはそれ以上の厚み間隔毎に配設してもよく、この場合には当然のことながら、上記支柱8にはその間隔と同一間隔毎にボルト取付孔8aが穿設される。   In addition, the rectangular frame 7 is not disposed at every thickness interval of the rainwater storage unit member 3, and when the rainwater storage unit member 3 is relatively thin, every two or more thickness intervals. In this case, as a matter of course, the column 8 is provided with bolt mounting holes 8a at the same intervals.

このように構成された点検口6において、隣接する支柱8、8の内面間の複数箇所を筋交い13によって連結して点検口6を剛直な直方体形状の開口枠となるように構成している。この筋交い13の装着作業は点検口6内を通じて行うことができ、互いにX状に交差させて筋交い13の両端部を支柱8における上記ボルト取付孔8aに合致させてボルト12により矩形枠7と共に支柱8に一体に固着している。   In the inspection port 6 configured as described above, a plurality of locations between the inner surfaces of the adjacent columns 8 and 8 are connected by the brace 13 so that the inspection port 6 becomes a rigid rectangular parallelepiped opening frame. The brace 13 can be attached through the inspection port 6 and crossed in an X shape so that both ends of the brace 13 are aligned with the bolt mounting holes 8a in the column 8, and the column 12 is supported by the bolt 12 together with the rectangular frame 7. 8 is integrally fixed.

上記貯水槽1における最上段の雨水貯留ユニット部材列の上面全面、及び、点検口6の上端開口部上には、上下方向に貫通した多数の小さな通水孔15a を有する仕切板15を縦横に敷設して補強層を形成していると共にこの補強層を介して貯水槽1を被覆材4によって被覆している。被覆材4としては、補強層上に敷設した透水性シート4aとこの透水性シート4a上に設けた土砂層等からなる透水性舗装層4bとからなり、降雨時には雨水を上この舗装層4bから透水性シート4a、補強層を構成している仕切板15に設けた通水孔15a を通じて貯水槽1内に浸入させように構成しているが、透水性舗装層4bに代えてアスファルト舗装層を、透水シート4aに代えて遮水シートをそれぞれ採用してもよく、この場合には、仕切板15に通水孔15a を設けておく必要はない。   On the entire upper surface of the uppermost rainwater storage unit member row in the water tank 1 and on the upper end opening of the inspection port 6, a partition plate 15 having a large number of small water passage holes 15 a penetrating in the vertical direction is arranged vertically and horizontally. The reinforcing layer is formed by laying, and the water tank 1 is covered with the covering material 4 through the reinforcing layer. The covering material 4 includes a water permeable sheet 4a laid on the reinforcing layer and a water permeable pavement layer 4b composed of a soil layer provided on the water permeable sheet 4a. It is configured to enter the water storage tank 1 through the water permeable sheet 4a and the water holes 15a provided in the partition plate 15 constituting the reinforcing layer, but the asphalt pavement layer is replaced with the water permeable pavement layer 4b. Instead of the water permeable sheet 4a, a water shielding sheet may be employed. In this case, it is not necessary to provide the water flow holes 15a in the partition plate 15.

仕切板15は雨水貯留ユニット部材3と嵌合する形状となった矩形形状板からなり、最上段の全ての雨水貯留ユニット部材3の上面に重ねていると共に、点検口6の上端開口部上に敷設している仕切板15には点検口6の上端開口部の中央に連通した作業員が出入り可能な大きさを有する円形孔或いは矩形孔からなる通孔15b を設けてあり、この通孔15b 上の被覆材4の部分を排除して地表面からこの通水孔15b に連通する人孔9を形成し、この人孔9の上端開口部を蓋体17によって開閉可能に閉止している。なお、点検口6の上端開口部上に複数個の仕切板15を配設している場合には、この点検口6を構成している最上部の矩形枠7の上端開口部に数本の水平補強フレーム(図示せず)を取付けて、これらの水平補強フレーム上に仕切板15を受止させ、舗装層上に係る載荷重を支持するように構成しておけばよい。この場合、組み合わせられた仕切板15の中央部に点検口6の上端開口部の中央に連通する開口部15b を設けている。なお、点検口6と人孔9との開口幅が同一である場合には、点検口6の開口上端を上方に延長するようにして人孔9を築造すればよい。   The partition plate 15 is made of a rectangular plate that fits into the rainwater storage unit member 3, is overlaid on the upper surface of all the uppermost rainwater storage unit members 3, and is on the upper end opening of the inspection port 6. The partition plate 15 is provided with a through hole 15b made of a circular hole or a rectangular hole having a size allowing an operator communicating with the center of the upper end opening of the inspection port 6 to enter and exit. A human hole 9 communicating from the ground surface to the water hole 15b is formed by removing the upper covering material 4 and the upper end opening of the human hole 9 is closed by a lid 17 so as to be opened and closed. When a plurality of partition plates 15 are arranged on the upper end opening of the inspection port 6, several pieces are provided in the upper end opening of the uppermost rectangular frame 7 constituting the inspection port 6. A horizontal reinforcing frame (not shown) may be attached, and the partition plate 15 may be received on these horizontal reinforcing frames to support the load applied on the pavement layer. In this case, an opening 15b communicating with the center of the upper end opening of the inspection port 6 is provided at the center of the combined partition plate 15. If the opening widths of the inspection port 6 and the human hole 9 are the same, the human hole 9 may be constructed by extending the upper end of the opening of the inspection port 6 upward.

一方、上記貯水槽1の一端部側における貯水槽1外の地中からこの貯水槽1の上端部内に雨水を導入するための雨水導入管10を配設している。貯水槽1の一端側には図1、図3に示すように、側溝や排水溝からの雨水を雨水流入管14を通じて受け入れる沈砂槽13が築造されてあり、この沈砂槽13内に流入した雨水を一旦、沈砂槽13に滞留させてその滞留中に雨水に含まれている砂利や粘土等の固形物を沈砂槽13内に沈澱、堆積させたのち、沈砂槽13から雨水導入管10を通じて雨水を貯水槽1内に導入、貯水させるように構成している。なお、沈砂槽13に開口している上記雨水導入管10の開口端にはゴミや落ち葉を除去するスクリーン(フィルター)22が張設されている。図中、16は貯水槽1の他端部における下端部に連通している雨水導出管である。   On the other hand, a rainwater introduction pipe 10 for introducing rainwater into the upper end portion of the water storage tank 1 from the ground outside the water storage tank 1 on one end side of the water storage tank 1 is disposed. As shown in FIGS. 1 and 3, a sand settling tank 13 is constructed on one end side of the water storage tank 1 to receive rainwater from a side ditch or a drainage ditch through a rainwater inflow pipe 14. Is temporarily retained in the sand settling tank 13, and solid matter such as gravel and clay contained in the rainwater is settled in the settling tank 13 and deposited in the sand settling tank 13, and then the rainwater is passed from the sand settling tank 13 through the rainwater introduction pipe 10. Is introduced and stored in the water tank 1. A screen (filter) 22 for removing dust and fallen leaves is stretched at the opening end of the rainwater introduction pipe 10 opened in the sand settling tank 13. In the figure, 16 is a rainwater outlet pipe communicating with the lower end of the other end of the water tank 1.

このように構成した雨水貯留施設は、降雨時において側溝や排水溝に流入した雨水を上記流入管14内を通じて沈砂槽13内に送り込み、この沈砂槽13内に一旦、滞留させて雨水に含まれている砂利や粘土等の固形物を沈砂槽13の底部に沈降させ、沈砂槽13の底部に堆積させる。堆積した固形物は後日、地上側から吸引ホース等を使用して吸入、排除される。沈砂槽13から雨水導入管10を通じて貯水槽1内に導入された雨水は、貯水槽1内に貯水され、その貯水中に沈砂槽13内では雨水から分離しなかった砂やシルト等を点検口6の底面や雨水貯留ユニット部材列の貯水空間部34の底面上に沈澱、堆積する。   The rainwater storage facility constructed in this way sends rainwater that has flowed into the side ditch or drainage ditch during raining into the sand settling tank 13 through the inflow pipe 14, and is temporarily retained in the sand settling tank 13 and contained in the rainwater. Solid materials such as gravel and clay are allowed to settle at the bottom of the sand basin 13 and are deposited at the bottom of the sand basin 13. The accumulated solid matter is inhaled and removed at a later date using a suction hose from the ground side. Rainwater introduced from the sand settling tank 13 through the rainwater introduction pipe 10 into the water storage tank 1 is stored in the water storage tank 1, and the sand, silt, etc. that are not separated from the rainwater in the sand settling tank 13 are inspected in the stored water. 6 and on the bottom surface of the water storage space 34 of the rainwater storage unit member row.

点検口6の底部や雨水貯留ユニット部材列の貯水空間部34の底面上に堆積した砂やシルト等は、貯水槽1内の雨水を排除したのち、点検口6の開口枠を形成している上下に隣接した矩形枠7、7間の空間部に臨んでいる雨水貯留ユニット部材列の貯水空間部34に点検口6内から高圧水噴射ノズル等を挿入して高圧水を噴射することにより、点検口6内に高圧水と共に排除すると共に雨水貯留ユニット部材列の貯水空間部34をその高圧水によって洗浄する。この作業は、点検口6の開口枠を形成している上下方向に配設した上記矩形枠7の四隅部に取付けている足場兼用補強フレーム7dを足場として容易に行うことができ、また、点検口6内を通じて貯水槽1内を定期的に点検することができる。この場合、貯水槽1内の数カ所に点検口6を設けておくことによって、貯水槽1全体の点検作業や、貯水槽1内に沈澱、堆積した砂やシルト等の除去作業が能率よく行うことができる。   Sand, silt, and the like deposited on the bottom of the inspection port 6 and the bottom surface of the water storage space 34 of the rainwater storage unit member row form an opening frame of the inspection port 6 after removing rainwater in the water tank 1. By inserting a high-pressure water injection nozzle or the like from the inside of the inspection port 6 into the water storage space 34 of the rainwater storage unit member row facing the space between the rectangular frames 7 and 7 adjacent to each other vertically, The high-pressure water is removed into the inspection port 6 and the water storage space 34 of the rainwater storage unit member row is washed with the high-pressure water. This work can be easily performed using the scaffolding / reinforcement frames 7d attached to the four corners of the rectangular frame 7 arranged in the vertical direction forming the opening frame of the inspection port 6 as a scaffold. The inside of the water tank 1 can be regularly inspected through the mouth 6. In this case, by providing inspection ports 6 at several locations in the water tank 1, the inspection work of the entire water tank 1 and the removal work of sand, silt, etc. deposited and accumulated in the water tank 1 can be efficiently performed. Can do.

なお、貯水槽1内に貯水された雨水は、雨水導出管16を通じ排水槽18でオリフィス19により流量が調節され徐々に排水管20より河川等に排出される。また、貯水槽1内に雨水が満杯になった場合は、排水槽18内に設けている余水吐21よりオーバーフローし、排水管20を通じ河川等に排出される。さらに、排水槽18内にボンプを設置し、貯留水を汲み上げて公園やグランド等への散水などに使用することもできる。   The rainwater stored in the water tank 1 is adjusted in flow rate by the orifice 19 in the drainage tank 18 through the rainwater outlet pipe 16 and gradually discharged from the drain pipe 20 to the river or the like. Further, when rainwater is full in the water storage tank 1, it overflows from a spillway 21 provided in the drainage tank 18 and is discharged to a river or the like through the drainage pipe 20. Furthermore, a pump can be installed in the drainage tank 18, and the stored water can be pumped up and used for watering the park or the ground.

以上の実施例においては、貯水槽1を構成する雨水貯留ユニット部材3として、平面矩形状の底板部31に、下端がこの底板部31から下方に全面的に開口している一定高さの截頭角錐形状の中空突部32を複数個、底板部31の互いに平行な一方の縁辺間に亘って連続させた状態で直列状に突設すると共にこの中空突部列を複数列、互いに平行な他方の縁辺間方向に一定間隔毎に突設してなる構造のものを使用しているが、このような雨水貯留ユニット部材3に限らず、従来から知られている構造の雨水貯留ユニット部材、例えば、図12に示すように、平面矩形状の底板部31' に複数本の中空筒状部材32' を突設してなる雨水貯留ユニット部材3'を使用してもよい。   In the above-described embodiment, the rainwater storage unit member 3 constituting the water tank 1 has a flat rectangular bottom plate portion 31 and a bottom having a constant height that has a lower end that is entirely open downward from the bottom plate portion 31. A plurality of hollow pyramid-shaped protrusions 32 are projected in series in a state of being continuous across one edge of the bottom plate 31 parallel to each other, and a plurality of rows of these hollow protrusions are parallel to each other. Although the thing of the structure formed by projecting at regular intervals in the direction between the other edges is used, not only such a rainwater storage unit member 3, but also a rainwater storage unit member having a conventionally known structure, For example, as shown in FIG. 12, a rainwater storage unit member 3 ′ formed by projecting a plurality of hollow cylindrical members 32 ′ on a planar rectangular bottom plate portion 31 ′ may be used.

この雨水貯留ユニット部材3'の底板部31' には上下面間に貫通する複数の通水孔(図示せず)が設けられていると共に中空筒状部材32' の頂面にも通水孔が設けられてあり、下段側の雨水貯留ユニット部材3'の中空筒状部材32' 上に上段の雨水貯留ユニット部材3'の底板部31' を載置して積み重ねるか、或いは、図に示すように、上側の雨水貯留ユニット部材3'を反転させた状態にしてその下向きとなった中空筒状部材32' の頂面を下側の雨水貯留ユニット部材3'の中空筒状部材32' の頂面に突き合わせ状態にして係合、受止させ、このように組み合わせた上下一対の雨水貯留ユニット部材3'、3'を貯水凹部2内に縦横に配設すると共に多段に積み重ねることによって貯水槽1を形成してもよい。   The bottom plate portion 31 ′ of the rainwater storage unit member 3 ′ is provided with a plurality of water passage holes (not shown) penetrating between the upper and lower surfaces, and also on the top surface of the hollow cylindrical member 32 ′. The bottom plate portion 31 'of the upper rainwater storage unit member 3' is placed and stacked on the hollow cylindrical member 32 'of the lower rainwater storage unit member 3' or shown in the figure. As described above, the top surface of the hollow cylindrical member 32 ′ that is turned downward with the upper rainwater storage unit member 3 ′ turned upside down is the hollow cylindrical member 32 ′ of the lower rainwater storage unit member 3 ′. A pair of rain water storage unit members 3 'and 3' combined in this manner are vertically and horizontally arranged in the water storage recess 2 and stacked in multiple stages while being engaged with and received from the top surface. 1 may be formed.

この貯水槽1の一部に雨水貯留ユニット部材3'を設けていない平面矩形状の空間部5を貯水槽1の全高に亘って設けて、この空間部5内に点検口6等を形成した構造は上記実施例と同様であるので、同一部分には同一符号を付して詳細な説明を省略する。   A flat rectangular space 5 in which no rainwater storage unit member 3 ′ is provided in a part of the water tank 1 is provided over the entire height of the water tank 1, and an inspection port 6 or the like is formed in the space 5. Since the structure is the same as in the above embodiment, the same parts are denoted by the same reference numerals and detailed description thereof is omitted.

1 貯水槽
2 貯水凹部
3 雨水貯留ユニット部材
4 被覆材
5 空間部
6 点検口
7 矩形枠
7d 足場兼用補強フレーム
8 支柱
9 人孔
10 雨水導入管
31 底板部
32 中空突部
34 貯水空間部
35 突出縁辺部
DESCRIPTION OF SYMBOLS 1 Water storage tank 2 Water storage recessed part 3 Rainwater storage unit member 4 Cover material 5 Space part 6 Inspection port 7 Rectangular frame
7d Scaffolding reinforcement frame 8 Prop 9 Human hole
10 Rainwater introduction pipe
31 Bottom plate
32 Hollow protrusion
34 Water storage space
35 Protruding edge

Claims (6)

地面を掘削することにより形成した貯水凹部内に雨水を貯留する内部空間を有する雨水貯留ユニット部材を縦横に敷設すると共に複数段に積み重ねることによって貯水槽を形成し、この貯水槽の上面を被覆材によって被覆すると共に貯水槽に外部から雨水を導入するための雨水導入管を設けてあり、さらに、上記貯水槽の一部に雨水貯留ユニット部材を配設していない平面矩形状の空間部を該貯水槽の全高に亘って設けてこの空間部内に点検口を配設し、地表から上記被覆材を貫通してこの点検口に連通する人孔を設けてなる雨水貯留施設において、上記点検口は、上記空間部内に上下方向に所定間隔毎に配設している複数個の矩形枠からなり、各矩形枠の縁辺部をその高さ位置に配設している雨水貯留ユニット部材の縁辺部に支持させていると共に、矩形枠の四方の内隅部に沿って上記空間部内に支柱を挿入してこれらの支柱に矩形枠の四隅部をボルトによって連結していることを特徴とする雨水貯留施設における点検口の構造。 A rainwater storage unit member having an internal space for storing rainwater is laid vertically and horizontally in a water storage recess formed by excavating the ground, and a water tank is formed by stacking in multiple stages, and the upper surface of this water tank is covered with a covering material And a rainwater introduction pipe for introducing rainwater from the outside into the water storage tank, and a planar rectangular space portion in which no rainwater storage unit member is disposed in a part of the water storage tank. In the rainwater storage facility, which is provided over the entire height of the water storage tank and provided with an inspection port in the space, and has a human hole penetrating the coating material from the ground surface and communicating with the inspection port, the inspection port is The rain water storage unit member is composed of a plurality of rectangular frames arranged at predetermined intervals in the vertical direction in the space, and the edge of each rectangular frame is arranged at the height of the rain water storage unit member. Supporting Together, along the inner corner of the square of the rectangular frame of the access door in the rainwater storage facilities, characterized in that it is connected by bolts four corners of the rectangular frame to the struts by inserting the posts into the space Construction. 矩形枠は四本の枠材を組み合わせることにより、点検口を設置するための平面矩形状の空間部内に挿入可能な大きさに形成していると共に互いに平行な2組の枠材のうち、一組の枠材にのみ外側面に雨水貯留ユニット部材の縁辺部上に受止させる一定幅を有する水平フランジ部を突設していることを特徴とする請求項1に記載の雨水貯留施設における点検口の構造。 The rectangular frame is formed into a size that can be inserted into a plane rectangular space for installing the inspection port by combining four frame members, and one of two sets of frame members parallel to each other. The inspection in the rainwater storage facility according to claim 1, wherein a horizontal flange portion having a certain width to be received on the edge portion of the rainwater storage unit member is protruded only on the outer surface of the pair of frame members. Mouth structure. 枠材は山形鋼からなり、この山形鋼の一方の辺を水平フランジ部としていることを特徴とする請求項に記載の雨水貯留施設における点検口の構造。 The structure of the inspection port in the rainwater storage facility according to claim 2 , wherein the frame member is made of angle steel, and one side of the angle steel is a horizontal flange portion. 矩形枠における互いに直角に連結している枠材の対向する端部間に足場兼用補強フレームを固着していることを特徴とする請求項1又は請求項2に記載の雨水貯留施設における点検口の構造。 The inspection frame in the rainwater storage facility according to claim 1 or 2 , wherein a scaffolding / reinforcement frame is fixed between opposing ends of the frame members connected at right angles to each other in the rectangular frame. Construction. 支柱は山形鋼からなり、その両辺に長さ方向に所定間隔毎に矩形枠の隅部内面に設けている螺子孔に螺着させるボルト取付孔を穿設していることを特徴とする請求項に記載の雨水貯留施設における点検口の構造。 The support column is made of angle steel, and bolt mounting holes to be screwed into screw holes provided on the inner surface of the corner of the rectangular frame at predetermined intervals in the lengthwise direction are formed on both sides thereof. The structure of the inspection port in the rainwater storage facility according to 1 . 隣接する支柱の内面間に筋交いを装着していることを特徴とする請求項又は請求項に記載の雨水貯留施設における点検口の構造。 The structure of the inspection port in the rainwater storage facility according to claim 1 or 5 , wherein a brace is attached between the inner surfaces of adjacent struts.
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JP6239404B2 (en) * 2013-05-15 2017-11-29 積水テクノ成型株式会社 Rainwater storage facility
WO2021166055A1 (en) * 2020-02-18 2021-08-26 エバタ株式会社 Partition plate and side plate for rainwater storage/permeation facility, structure for rainwater storage/permeation facility, and rainwater storage/permeation facility
KR102669555B1 (en) * 2023-10-26 2024-05-27 조은산업 주식회사 Rainwater treatment and high-flow drainage trench

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