JP2008150809A - Rainwater permeation institution - Google Patents

Rainwater permeation institution Download PDF

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JP2008150809A
JP2008150809A JP2006337777A JP2006337777A JP2008150809A JP 2008150809 A JP2008150809 A JP 2008150809A JP 2006337777 A JP2006337777 A JP 2006337777A JP 2006337777 A JP2006337777 A JP 2006337777A JP 2008150809 A JP2008150809 A JP 2008150809A
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rainwater
water
storage tank
permeable
layer
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JP4571613B2 (en
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Tetsuya Uehara
哲也 上原
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KEIYO MARUZEN KK
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KEIYO MARUZEN KK
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater permeation institution, connected to a rainwater storing tank, and not requiring the labor and cost for constructing a drain pipe extending to a neighboring river or the like. <P>SOLUTION: This rainwater permeation institution 10 includes: the rainwater storing tank 20 provided in a water impermeable layer 14 to store rainwater from a rainwater drain pipe 18 provided below a side ditch of a paved road; and a drain conduit 22 connected to the side of the rainwater storing tank 20 to guide rainwater from the rainwater storing tank 20 into a water permeable layer 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、不透水層に設けられた雨水貯留槽に集められた雨水を不透水層下の透水層中へ導くための雨水浸透施設に関する。   The present invention relates to a rainwater infiltration facility for guiding rainwater collected in a rainwater storage tank provided in an impermeable layer into a permeable layer below the impermeable layer.

従来から、大規模商業施設、スポーツ競技場、工場、舗装道路、住宅地域等における雨水の排水設備として、一時的に雨水を貯める貯留槽とこれに接続した、近隣の河川等まで延びる排水管とを設け、貯水量が一定値を越えた場合に排水管を通して河川等へ排水し、雨水対策を行っている。   Conventionally, as a drainage facility for rainwater in large-scale commercial facilities, sports stadiums, factories, paved roads, residential areas, etc., storage tanks that temporarily store rainwater and drain pipes that connect to nearby rivers etc. In order to prevent rainwater, drainage pipes drain into the river when the amount of stored water exceeds a certain value.

ところで、前記貯留槽からの雨水の溢水を回避するためには、前記貯留槽をより大型のものとし、あるいは前記排水管をより大径のものとしなければならない。しかし、これには多大の費用と労力とを要する。 By the way, in order to avoid the overflow of rain water from the storage tank, the storage tank must be larger or the drain pipe must be larger. However, this requires a great deal of cost and effort.

そこで、本発明の目的は、雨水貯留槽に接続した、近隣の河川等まで延びる排水管の設置工事による労力やその費用を必要としない雨水浸透施設を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a rainwater infiltration facility that does not require labor and cost for installing drainage pipes connected to a rainwater storage tank and extending to nearby rivers.

本発明の雨水浸透施設は、不透水層と該不透水層下の透水層とを有する地盤に適用される雨水浸透施設であって、前記不透水層中に設けられた雨水を貯めるための雨水貯留槽と、該雨水貯留槽から前記透水層中に雨水を導くための導水手段とを含む。   The rainwater infiltration facility of the present invention is a rainwater infiltration facility applied to the ground having an impermeable layer and a permeable layer below the impermeable layer, and rainwater for storing rainwater provided in the impermeable layer. A storage tank and water guide means for guiding rainwater from the rainwater storage tank into the permeable layer.

また、前記導水手段としては導管を使用することができる。前記導管の一部を取り巻くように配置された、前記不透水層から前記透水層へ延びる筒体を含み、該筒体は前記透水層に開放する複数の開口を有するようにすることができる。 Further, a conduit can be used as the water guiding means. It includes a cylinder that extends from the water-impermeable layer to the water-permeable layer and is disposed so as to surround a part of the conduit, and the cylinder has a plurality of openings that open to the water-permeable layer.

さらに、前記導水手段としては該雨水貯留槽の下方に設けられた透水体を使用することができる。 Further, as the water guiding means, a water permeable body provided below the rainwater storage tank can be used.

発明の作用および効果Effects and effects of the invention

本発明の雨水浸透施設は、前記不透水層中に設けられた雨水を貯めるための雨水貯留槽と該雨水貯留槽から前記透水層中に雨水を導くための導水手段とを含むので、雨水貯留槽に貯めた雨水の位置水頭により、該導水手段によって導かれる雨水に排水圧が掛かり、該導水手段を通して透水層へ多量に排水できる。   The rainwater infiltration facility of the present invention includes a rainwater storage tank for storing rainwater provided in the impermeable layer and a water guide means for guiding rainwater from the rainwater storage tank to the water permeable layer. Due to the position head of rainwater stored in the tank, drainage pressure is applied to the rainwater guided by the water guiding means, and a large amount of water can be drained to the permeable layer through the water guiding means.

前記導水手段として導水管を使用すれば、全排水圧は導水管内の雨水に掛かり、より確実に雨水を透水層へ導くことができる。この場合、前記導水管の一部を取り巻くように配置された、前記不透水層から前記透水層へ延びる筒体を含み、該筒体は前記透水層に開放する複数の開口を有するようにすれば、前記導水管の排水端口付近に土砂のない空間を設け、勢いよく排水させて、さらに排水圧を大きくして前記開口を通して確実に雨水を透水層へ導くことができる。   If a water conduit is used as the water guiding means, the total drain pressure is applied to the rain water in the water conduit, and the rain water can be more reliably guided to the permeable layer. In this case, the cylinder includes a cylinder that is disposed so as to surround a part of the water conduit and extends from the water-impermeable layer to the water-permeable layer, and the cylinder has a plurality of openings that are open to the water-permeable layer. For example, a space without earth and sand can be provided in the vicinity of the drainage end of the water conduit, and the drainage can be drained vigorously, and the drainage pressure can be increased to reliably guide rainwater to the permeable layer through the opening.

前記導水手段として、前記雨水貯留槽の下方に設けられた透水体を使用すれば、雨水貯留槽内の雨水全体の位置水頭を利用しつつ、大きい透水面積を確保できるので、より多くの雨水を透水層へ導くことができる。   If a permeable body provided below the rainwater storage tank is used as the water guiding means, a large water permeable area can be secured while utilizing the position head of the entire rainwater in the rainwater storage tank. It can lead to a water permeable layer.

また、透水層への排水量を増加させることによって、雨水貯留槽へ雨水の貯水量を低減することができ、雨水貯留槽自体を小さくして、その費用を低減できる。また、その設置工事においては、浅いところに設置でき、そのスペースの確保が容易になると共に、工事費用を低減できる。特に、地中に障害物が存在する場合には浅いところに設置できるのは有利である。 In addition, by increasing the amount of drainage to the water permeable layer, the amount of rainwater stored in the rainwater storage tank can be reduced, and the rainwater storage tank itself can be reduced to reduce its cost. In addition, the installation work can be performed in a shallow place, so that the space can be easily secured and the construction cost can be reduced. In particular, when there are obstacles in the ground, it is advantageous to install in a shallow place.

図１には、本発明の第１の実施態様に係る雨水浸透施設１０が地盤１２中に布設された状態で示されている。なお、地盤１２は、雨水等の水分が浸透しにくい不透水層１４とその下方の浸透し易い透水層１６とからなる。   FIG. 1 shows a rainwater infiltration facility 10 according to a first embodiment of the present invention in a state where it is laid in the ground 12. The ground 12 includes a water-impermeable layer 14 in which moisture such as rainwater is difficult to permeate, and a water-permeable layer 16 that is easy to permeate thereunder.

この雨水浸透施設１０は不透水層１４中に設けられた雨水貯留槽２０と、雨水貯留槽２０の側面に接続した排水導管２２とからなる。雨水貯留槽２０は舗装道路の側溝の下方に設けた雨水排水管１８からの雨水を貯める。排水導管２２は雨水貯留槽２０から透水層１６中に雨水を導く。また、排水導管２２は水平部分２４と垂直部分２６とからなり、その垂直部分２６の一部を取り巻くように同軸的に配置された、不透水層１４から透水層１６へ延びる土留め管２８を含む。排水導管２２の垂直部分２６は土留め管２８の底部付近まで延びている。 The rainwater infiltration facility 10 includes a rainwater storage tank 20 provided in the impermeable layer 14 and a drainage conduit 22 connected to the side surface of the rainwater storage tank 20. The rainwater storage tank 20 stores rainwater from a rainwater drain pipe 18 provided below a side groove of the paved road. The drainage conduit 22 guides rainwater from the rainwater storage tank 20 into the permeable layer 16. Further, the drainage conduit 22 includes a horizontal portion 24 and a vertical portion 26, and a retaining tube 28 extending coaxially from the impermeable layer 14 to the permeable layer 16 is disposed so as to surround a part of the vertical portion 26. Including. The vertical portion 26 of the drainage conduit 22 extends to near the bottom of the earth retaining tube 28.

土留め管２８は円筒形状の立て坑に布設される。また、土留め管２８は立て坑と同じ円筒形状を有し、側面３０，頂部蓋体３２および底部蓋体３４からなる。本実施態様の土留め管２８の径寸法は、例えば直径３００から６００ｍｍの範囲が考えられるが、この寸法に限定されない。また、土留め管２８は立て坑が通常、円筒形状に掘削されることから円筒形状のものを使用したが、この形状に限定されず、立て坑に挿入できれば、任意の形状、例えば四角柱形状にすることができる。 The earth retaining tube 28 is installed in a cylindrical shaft. The earth retaining tube 28 has the same cylindrical shape as the shaft and includes a side surface 30, a top lid body 32, and a bottom lid body 34. The diameter dimension of the earth retaining tube 28 of this embodiment may be, for example, in the range of 300 to 600 mm in diameter, but is not limited to this dimension. The retaining pipe 28 has a cylindrical shape because the shaft is normally excavated into a cylindrical shape. However, the retaining tube 28 is not limited to this shape, and may be any shape as long as it can be inserted into the shaft. Can be.

側面３０は立て坑の壁面の土砂が崩落するのを防止し、頂部蓋体３２および底部蓋体３４は土留め管２８内部に土砂等の異物が侵入するのを防止する。また、側面３０は不透水層１４中に埋設された上方部分３６と透水層１６中に埋設された下方部分３８とからなり、この下方部分３８は透水層１６に開放する複数の開口４０（図１では６個だけ示される）を有する。 The side surface 30 prevents the sediment on the wall surface of the shaft from collapsing, and the top lid body 32 and the bottom lid body 34 prevent foreign matters such as earth and sand from entering the retaining pipe 28. The side surface 30 includes an upper portion 36 embedded in the impermeable layer 14 and a lower portion 38 embedded in the water permeable layer 16, and the lower portion 38 has a plurality of openings 40 (see FIG. 1 shows only 6).

図２は、上方部分３６および下方部分３８の構造を部分的に拡大して示し、上方部分３６は塩ビシート４２とその上に重ねた不織布４４とによって被覆され、下方部分３８および底部蓋体３４は透水シート４６によって覆われ、上方部分３６および下方部分３８の境界部は透水シート４６を不織布４４上にわずかに重ねている。この透水シート４６は開口４０付近の透水層１６の土砂による開口４０の目詰まりを防止する。なお、図２には頂部蓋体３２の状態は示されていないが、排水導管２６との接続部分を除いて塩ビシート４２および不織布４４が被覆されている。ここで、塩ビシート３６は、例えば１．５ｍｍの厚さ、不織布３８は例えば４．０ｍｍの厚さ、そして透水シートは例えば２．０ｍｍの厚さを有するものを好ましく使用できるが、これらの厚さには限定されない。 FIG. 2 shows in partial enlargement the structure of the upper portion 36 and the lower portion 38, which is covered by a PVC sheet 42 and a non-woven fabric 44 overlying the lower portion 38 and the bottom lid 34. Is covered with a water permeable sheet 46, and the boundary between the upper part 36 and the lower part 38 slightly overlaps the water permeable sheet 46 on the nonwoven fabric 44. The water permeable sheet 46 prevents the opening 40 from being clogged with earth and sand in the water permeable layer 16 near the opening 40. Although the state of the top lid 32 is not shown in FIG. 2, the PVC sheet 42 and the nonwoven fabric 44 are covered except for the connection portion with the drainage conduit 26. Here, it is preferable to use a PVC sheet 36 having a thickness of 1.5 mm, a nonwoven fabric 38 having a thickness of 4.0 mm, and a water-permeable sheet having a thickness of 2.0 mm, for example. The size is not limited.

次に、雨水透水施設１０が雨水を透水層１６へ排水する、雨水の流れを説明する。図１中矢印で示されるように、雨水排水管１８からの雨水が雨水貯留槽２０に集められ、貯留される。雨水貯留槽２０内の貯留水が一定の水位になると、排水導管２２の水平部分２４および垂直部分２６を通して土留め管２８内に送られる。このとき、雨水貯留槽２０への排水導管２２の取り付け位置から垂直部分２６を通して土留め管２８内の水位までの位置水頭差による排水圧によって勢いよく雨水は土留め管２２内の底部に導入され、開口４０およびその部分の透水シート４６を通して透水層１６へ排水される。 Next, the flow of rainwater in which the rainwater permeable facility 10 drains rainwater to the permeable layer 16 will be described. As shown by the arrows in FIG. 1, rainwater from the rainwater drain pipe 18 is collected and stored in the rainwater storage tank 20. When the stored water in the rainwater storage tank 20 reaches a certain level, it is sent into the earth retaining pipe 28 through the horizontal portion 24 and the vertical portion 26 of the drainage conduit 22. At this time, rainwater is vigorously introduced into the bottom of the retaining pipe 22 due to the drainage pressure due to the position head difference from the attachment position of the drainage conduit 22 to the rainwater storage tank 20 through the vertical portion 26 to the water level in the retaining pipe 28. Then, the water is drained to the water permeable layer 16 through the opening 40 and the water permeable sheet 46 of the portion.

なお、導入されるすべて雨水が直ちに透水層１６へ排水されない場合には、土留め管２８内に一時的に貯留される。その貯留水の水位が上昇すれば、その位置水頭による排水圧が開口４０を通して透水シート４６へ掛かり、その排水圧による透水層１６への排水も行われる。 In addition, when all rainwater to be introduced is not immediately drained to the permeable layer 16, it is temporarily stored in the earth retaining pipe 28. When the water level of the stored water rises, the drainage pressure by the position head is applied to the permeable sheet 46 through the opening 40, and the drainage to the permeable layer 16 by the drainage pressure is also performed.

雨水浸透施設１０は、既存の雨水貯留槽への工事に関して、排水管を河川等へ延ばして布設するよりも雨水貯留槽の近辺において下方に排水導管を布設するだけなので、安価に設置することができる。   The rainwater infiltration facility 10 can be installed at a low cost with respect to the construction of the existing rainwater storage tank because the drainage pipe is laid down in the vicinity of the rainwater storage tank rather than extending the drainage pipe to the river or the like. it can.

また、本実施態様では、雨水浸透施設１０を道路側溝の排水対策用に設けたが、透水層までの地中に障害物がない空きスペースがあれば、冠水する場所のポイントごとに設置することもできる。   Moreover, in this embodiment, the rainwater infiltration facility 10 is provided for drainage countermeasures for road gutters. However, if there is an empty space with no obstacles in the ground up to the permeable layer, it should be installed at each point of the flooded place. You can also.

図３は、図１の雨水浸透施設１０とは異なる、本発明の第２の実施態様に係る雨水浸透施設５０を示す。図中、図１と同じ構成には同じ参照番号を付して、その説明を省略する。 FIG. 3 shows a rainwater infiltration facility 50 according to the second embodiment of the present invention, which is different from the rainwater infiltration facility 10 of FIG. In the figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

雨水浸透施設５０は、地中に設けた雨水排水管１８からの雨水を貯めるための雨水貯留槽５２と、この雨水貯留槽５２から透水層１６中に雨水を導くための排水導管５４とからなる。 The rainwater infiltration facility 50 includes a rainwater storage tank 52 for storing rainwater from the rainwater drain pipe 18 provided in the ground, and a drainage conduit 54 for guiding rainwater from the rainwater storage tank 52 into the permeable layer 16. .

雨水貯留槽５２は、その内部に充填した周知の浸透層と、頂面中央部から底面中央部まで延びる四角柱形状の点検用マンホール５６とをからなる。この点検用マンホール５６に対応する雨水貯水槽５２の底面に排水導管５４が接続される。この排水導管５４はその全体を取り巻くように同軸的に配置された土留め管２８を含む。排水導管５４は土留め管２８の頂部から底部付近まで延びている。 The rainwater storage tank 52 includes a well-known permeation layer filled therein, and a quadrangular prism-shaped inspection manhole 56 extending from the center of the top surface to the center of the bottom surface. A drainage conduit 54 is connected to the bottom surface of the rainwater storage tank 52 corresponding to the inspection manhole 56. The drainage conduit 54 includes a retaining pipe 28 that is coaxially disposed to surround the drainage conduit 54. The drainage conduit 54 extends from the top of the retaining pipe 28 to the vicinity of the bottom.

次に、雨水透水施設５０が雨水を透水層１６へ排水する、雨水の流れを説明する。図３中の矢印で示されるように、雨水排水管１８からの雨水が雨水貯留槽５２に集められ、貯留される。雨水貯留槽５２内の貯留水は、排水導管５４を通して土留め管３０内に送られる。このとき、雨水貯留槽５２の底面から土留め管３０内の水位までの位置水頭差による排水圧によって勢いよく雨水は土留め管３０内の底部に導入され、開口４０およびその部分の透水シート４６を通して透水層１６へ排水される。   Next, the flow of rainwater in which the rainwater permeable facility 50 drains rainwater to the permeable layer 16 will be described. As indicated by the arrows in FIG. 3, rainwater from the rainwater drain pipe 18 is collected and stored in the rainwater storage tank 52. The stored water in the rainwater storage tank 52 is sent into the earth retaining pipe 30 through the drainage conduit 54. At this time, rainwater is vigorously introduced into the bottom of the retaining pipe 30 by the drainage pressure due to the position head difference from the bottom surface of the rainwater storage tank 52 to the water level in the retaining pipe 30, and the opening 40 and the permeable sheet 46 of that portion. It is drained to the water permeable layer 16 through.

図３の雨水浸透施設５０の排水導管５４は、雨水貯留槽５２の真下に布設するので、雨水貯留槽５２の設置スペース以外に横方向の設置スペースを設けることがなく、例えば道路の敷設時やマンション、駐車場等の敷地内に新規に雨水貯留槽を設置する場合に好適である。特に、種々の施設が密集したエリアには都合が良い。また、既存の雨水貯留槽の場合でも、その内部から、例えば点検用マンホール５４から雨排水導管５４の設置工事を行うこともできる。 Since the drainage conduit 54 of the rainwater infiltration facility 50 in FIG. 3 is laid directly under the rainwater storage tank 52, there is no provision of a lateral installation space other than the installation space of the rainwater storage tank 52. This is suitable when a rainwater storage tank is newly installed in a site such as a condominium or a parking lot. This is particularly convenient in areas where various facilities are densely packed. In addition, even in the case of an existing rainwater storage tank, installation work of the rain drainage conduit 54 can be performed from the inside, for example, from the inspection manhole 54.

図４は本発明の第３の実施態様に係る雨水浸透施設６０を示す。 FIG. 4 shows a rainwater infiltration facility 60 according to a third embodiment of the present invention.

雨水浸透施設６０は、雨水排水管１８からの雨水を貯めるための円柱形状の雨水貯留槽６２と、この雨水貯留槽６２の下方に形成した円柱形状の透水部６４と、雨水浸透施設６０の頂面中央部から底面中央部まで延びる四角柱形状の点検用マンホール６６とからなる。透水部６４は雨水貯留槽６２から透水層１６中に雨水を導く。雨水貯留槽６２は周知の貯留層からなり、透水部６４は周知の浸透層からなる。 The rainwater infiltration facility 60 includes a cylindrical rainwater storage tank 62 for storing rainwater from the rainwater drain pipe 18, a cylindrical water permeable portion 64 formed below the rainwater storage tank 62, and the top of the rainwater infiltration facility 60. It consists of a quadrangular prism-shaped inspection manhole 66 extending from the center of the surface to the center of the bottom surface. The permeable portion 64 guides rainwater from the rainwater storage tank 62 into the permeable layer 16. The rainwater storage tank 62 consists of a well-known reservoir, and the water permeable part 64 consists of a well-known permeation layer.

本実施態様では、雨水浸透施設６０は全体として円柱形状を有するが、この形状に限定されない。また、雨水浸透施設６０は不透水層１４から透水層１６まで延びる、円柱状の立て坑に布設されたが、立て坑の形状には限定されない。さらに、雨水貯留槽６２を貯留槽で形成したが、その周囲は不透水層１４で囲まれていることから、雨水浸透施設６０全体を浸透層で形成することもできる。 In this embodiment, the rainwater infiltration facility 60 has a cylindrical shape as a whole, but is not limited to this shape. Moreover, although the rainwater penetration | infiltration facility 60 was laid by the column-shaped shaft which extends from the impermeable layer 14 to the water-permeable layer 16, it is not limited to the shape of a shaft. Furthermore, although the rainwater storage tank 62 was formed with the storage tank, since the circumference | surroundings are surrounded by the impermeable layer 14, the rainwater infiltration facility 60 whole can also be formed with an infiltration layer.

図５は、雨水貯留槽６２および透水部６４の接続部分を部分的に拡大して示す。雨水貯留槽６２は塩ビシート６８とその上に重ねた不織布７０とによって被覆され、一方、透水部６４は透水シート７２によって被覆される。雨水貯留槽６２および透水部６４の接続部分は透水シート７２を不織布７０上にわずかに重ねている。この透水シート７２は、浸透時に透水層１６の土砂によって透水部６４が目詰まりするのを防止する。塩ビシート６８、不織布７０および透水シート７２は図２の塩ビシート４２、不織布４４および透水シート４６と同様の構成を有する。なお、図５には示されていないが、雨水貯留槽６２の他の部分は、雨水排水管１８との接続部分を除いて塩ビシート６８と不織布７０とによって覆われている。 FIG. 5 is a partially enlarged view showing a connection portion between the rainwater storage tank 62 and the water permeable portion 64. The rainwater storage tank 62 is covered with a polyvinyl chloride sheet 68 and a nonwoven fabric 70 stacked thereon, while the water permeable portion 64 is covered with a water permeable sheet 72. The connection part of the rainwater storage tank 62 and the water permeable part 64 has the water permeable sheet 72 slightly overlapped on the nonwoven fabric 70. The water permeable sheet 72 prevents the water permeable portion 64 from being clogged by the earth and sand of the water permeable layer 16 during permeation. The PVC sheet 68, the nonwoven fabric 70, and the water-permeable sheet 72 have the same configuration as the PVC sheet 42, the nonwoven fabric 44, and the water-permeable sheet 46 of FIG. Although not shown in FIG. 5, the other part of the rainwater storage tank 62 is covered with the PVC sheet 68 and the nonwoven fabric 70 except for the connection part with the rainwater drain pipe 18.

雨水浸透施設６０は、透水部６４は周知の浸透層からなるので、透水面積を大きく設定でき、比較的透水性の悪い透水層の透水率を増加させるのに好適である。例えば、駐車場等の敷地内に新規に雨水貯留槽を設置する場合に好適である。   In the rainwater infiltration facility 60, since the water permeable portion 64 is made of a known osmotic layer, the water permeable area can be set large, and it is suitable for increasing the water permeability of the water permeable layer having relatively poor water permeability. For example, it is suitable when a rainwater storage tank is newly installed in a site such as a parking lot.

本発明の第１の実施態様に係る雨水浸透施設の概念図である。It is a conceptual diagram of the rainwater infiltration facility which concerns on the 1st embodiment of this invention. 図１の土留め管の一部拡大概念図である。It is a partial expansion conceptual diagram of the earth retaining pipe of FIG. 本発明の第２の実施態様に係る雨水浸透施設の概念図である。It is a conceptual diagram of the rainwater penetration | infiltration facility which concerns on the 2nd embodiment of this invention. 本発明の第３の実施態様に係る雨水浸透施設の概念図である。It is a conceptual diagram of the rainwater penetration | infiltration facility which concerns on the 3rd embodiment of this invention. 図４の雨水貯留槽と透水体との接続部分の一部拡大概念図である。It is a partial expansion conceptual diagram of the connection part of the rainwater storage tank of FIG. 4, and a permeable body.

符号の説明Explanation of symbols

１０ ５０ ６０ 雨水浸透施設
１２ 地盤
１４ 不透水層
１６ 透水層
１８ 雨水排水管
２０ ５２ ６２ 雨水貯留槽
２２ ５４ 排水導管（導水手段）
２４ 水平部分
２６ 垂直部分
２８ 土留め管（筒体）
３０ 側面
３２ 頂部蓋体
３４ 底部蓋体
３６ 上方部分
３８ 下方部分
４０ 開口
４２ ６８ 塩ビシート
４４ ７０ 不織布
４６ ７２ 透水シート
５６ ６６ 点検用マンホール
６４ 透水部（透水体） 10 50 60 Rainwater infiltration facility 12 Ground 14 Impervious layer 16 Permeable layer 18 Rainwater drain pipe 20 52 62 Rainwater storage tank 22 54 Drainage conduit (conducting means)
24 Horizontal part 26 Vertical part 28 Earth retaining pipe (cylinder)
30 sides
32 Top cover body 34 Bottom cover body 36 Upper part 38 Lower part 40 Opening 42 68 PVC sheet 44 70 Nonwoven fabric 46 72 Water permeable sheet 56 66 Manhole for inspection 64 Water permeable part (water permeable body)

Claims (4)

不透水層と該不透水層下の透水層とを有する地盤に適用される雨水浸透施設であって、
前記不透水層中に設けられた雨水を貯めるための雨水貯留槽と、
該雨水貯留槽から前記透水層中に雨水を導くための導水手段とを含む、雨水浸透施設。 A rainwater infiltration facility applied to the ground having an impermeable layer and a permeable layer below the impermeable layer,
A rainwater storage tank for storing rainwater provided in the impermeable layer;
A rainwater infiltration facility comprising: water guide means for guiding rainwater from the rainwater storage tank into the permeable layer. 前記導水手段は導水管である、請求項１に記載の雨水浸透施設。 The rainwater infiltration facility according to claim 1, wherein the water guiding means is a water conduit. 前記導水管の一部を取り巻くように配置された、前記不透水層から前記透水層へ延びる筒体を含み、該筒体は前記透水層に開放する複数の開口を有する、請求項２に記載の雨水浸透施設。 The cylindrical body which is arranged so as to surround a part of the water conduit and extends from the water-impermeable layer to the water-permeable layer has a plurality of openings which open to the water-permeable layer. Rainwater infiltration facilities. 前記導水手段は該雨水貯留槽の下方に設けられた透水体からなる、請求項１に記載の雨水浸透施設。 The rainwater infiltration facility according to claim 1, wherein the water guiding means includes a water permeable body provided below the rainwater storage tank.
JP2006337777A 2006-12-15 2006-12-15 Rainwater infiltration facility Expired - Fee Related JP4571613B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100952192B1 (en) 2010-01-07 2010-04-09 임철웅 Water pocket well for infiltrating a rainwater
CN104863209A (en) * 2015-05-19 2015-08-26 东北师范大学 Device for collecting rainfall used for supplementing soil water under earth surface hard cover
JP2020197017A (en) * 2019-05-31 2020-12-10 国立大学法人三重大学 Construction method of permeable structure and permeable structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956285U (en) * 1982-10-01 1984-04-12 タキロン株式会社 Underground water permeation device
JPS604689U (en) * 1983-06-20 1985-01-14 積水化学工業株式会社 filter
JPH03108081U (en) * 1990-02-21 1991-11-07
JPH11210063A (en) * 1998-01-29 1999-08-03 Igarashi Hiroshi Structure for channel
JP2001329602A (en) * 2000-05-23 2001-11-30 Maeda Seikan Kk Underground drainage system for surface water
JP2002004393A (en) * 2000-06-27 2002-01-09 Maeda Seikan Kk Device for returning surface water to underground
JP2002322726A (en) * 2001-04-25 2002-11-08 Miyoshi Tadahira Underground permeation and drainage structure and its construction method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956285U (en) * 1982-10-01 1984-04-12 タキロン株式会社 Underground water permeation device
JPS604689U (en) * 1983-06-20 1985-01-14 積水化学工業株式会社 filter
JPH03108081U (en) * 1990-02-21 1991-11-07
JPH11210063A (en) * 1998-01-29 1999-08-03 Igarashi Hiroshi Structure for channel
JP2001329602A (en) * 2000-05-23 2001-11-30 Maeda Seikan Kk Underground drainage system for surface water
JP2002004393A (en) * 2000-06-27 2002-01-09 Maeda Seikan Kk Device for returning surface water to underground
JP2002322726A (en) * 2001-04-25 2002-11-08 Miyoshi Tadahira Underground permeation and drainage structure and its construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100952192B1 (en) 2010-01-07 2010-04-09 임철웅 Water pocket well for infiltrating a rainwater
CN104863209A (en) * 2015-05-19 2015-08-26 东北师范大学 Device for collecting rainfall used for supplementing soil water under earth surface hard cover
JP2020197017A (en) * 2019-05-31 2020-12-10 国立大学法人三重大学 Construction method of permeable structure and permeable structure

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