JP5844563B2

JP5844563B2 - Liner plate drainage well drainage structure and drainage structure

Info

Publication number: JP5844563B2
Application number: JP2011150786A
Authority: JP
Inventors: 吉田　幸司; 幸司吉田; 剛男原田
Original assignee: Nippon Steel Metal Products Co Ltd
Current assignee: Nippon Steel Metal Products Co Ltd
Priority date: 2011-07-07
Filing date: 2011-07-07
Publication date: 2016-01-20
Anticipated expiration: 2031-07-07
Also published as: JP2013019102A

Description

この発明は、地すべり抑制工として主に山間地に設置されているライナープレート集水井において、同ライナープレート集水井の背面土側に存在する地下水や、同ライナープレート背面を伝い下りる自然水など（以下、背面水という。）を自然排水するために設けている集水孔を利用して行う排水構造と、前記排水構造に使用される排水用部材の技術分野に属する。 The present invention relates to liner plate catchment wells installed mainly in mountainous areas as landslide control works, such as ground water existing on the back soil side of the liner plate catchment wells, natural water flowing down the back of the liner plate, etc. , A drainage structure that uses a water collection hole provided for natural drainage, and a drainage member used in the drainage structure.

従来、ライナープレート集水井１は、図１に例示したように、地すべり面２が予測される山間地に例えば深さ１０ｍ〜３０ｍ、直径３．５ｍ程度の規模で設置して背面水の集水を図り、地すべり抑制に効果を挙げている。
具体的構造を図２に示したように、ライナープレート集水井１は、単位大きさのライナープレート４を円筒形状に組み立てて構築され、頂部には落下防止の安全性を図る天蓋３を設置している。ライナープレート４には、図４Ａ、Ｂに例示したような配置で、自然集水を目的とする集水孔５を直径φ３０〜φ５０ｍｍ程度の大きさで一定のピッチと配列で一基あたりの集水孔数は２００〜６００個程度設けられている。
更に背面水の積極的な集・排水を行う目的で、外周部の地山に向かって放射状の配置で複数本の集水ボーリング６を施工し、また、集水した水を自然排水するため近隣の川７などに向かって繋がる排水ボーリング８を施工する。或いはポンプを設置して汲み上げることも行われる。 Conventionally, as illustrated in FIG. 1, the liner plate water collection well 1 is installed in a mountainous area where a landslide surface 2 is predicted, for example, with a depth of about 10 m to 30 m and a diameter of about 3.5 m. And is effective in suppressing landslides.
As shown in FIG. 2, the liner plate water well 1 is constructed by assembling a unit-sized liner plate 4 into a cylindrical shape, and a canopy 3 is installed on the top for safety in preventing fall. ing. The liner plate 4, Figure 4A, an arrangement such as illustrated in B, per group in sequence with a constant pitch water collection hole 5 in the atmosphere of a diameter φ30~φ50mm intended for natural water collecting About 200 to 600 water collecting holes are provided.
In addition, for the purpose of actively collecting and draining the back water, multiple water collection bores 6 are constructed in a radial arrangement toward the surrounding natural ground, and the collected water is naturally drained in order to drain naturally. Construction of drainage boring 8 connected to the river 7 etc. Or a pump is installed and pumped up.

上記のような集水井に関する先行技術として、下記の特許文献１には、集水井の水抜きボーリングの排水量を増加させる方法に関する技術が開示されている。また、下記の特許文献２には、水抜きボーリングに関する技術が開示されている。
更に特許文献３には、集水井を構成するライナープレートの集水孔の目詰まり修復作業を容易且つ短時間で行うことができる、集水井の水抜き栓の技術が開示されている。 As a prior art relating to the above-described water collection well, the following Patent Document 1 discloses a technique relating to a method for increasing the amount of drainage of drainage boring in the water collection well. Patent Document 2 below discloses a technique related to drain boring.
Furthermore, Patent Document 3 discloses a drain plug technology for a drainage well that can easily and quickly repair clogging of the catchment holes of the liner plate constituting the drainage well.

特開２００２−４２９５号公報JP 2002-4295 A 特開２００６−１６９９３０号公報JP 2006-169930 A 特開２００９−２０３７７７号公報JP 2009-203777 A

上記集水井が、周辺の背面土に存在する背面水の集水を積極的に進める結果、地すべり抑制に効果を挙げていることは既に知られている。
上記ライナープレート４を組み立てて構築したライナープレート集水井１の場合は、同ライナープレート４に背面水の集水を目的として設けた集水孔５を通じて背面土側から背面水が滲み出る。その背面水はライナープレート４の内面を伝って集水井内に集水されるため、同背面水及び背面水に含まれた成分により、集水孔５の位置より下方のライナープレート４の内面に、時間の経過と共に鉄分などの異物が付着したり、ライナープレート内面の腐食が進行する現象が知られ、問題点として解決課題に挙げられている。
即ち、地山側から滲み出る背面水には、当然酸やアルカリの成分などが含まれていることが多い。また、集水孔５から滲み出た背面水はライナープレート４の内面を伝い落ちて水濡れ状態を呈し、その途中では空気と接触する。そして、滲出量が少ないときは乾燥する等々の現象を長期に繰り返す結果、ライナープレート４における背面水の滲出域の内面に施された防食処理（溶融亜鉛メッキ等）が浸食され、腐食（錆の発生）が進行するという問題点が指摘されている。
その対策として、従来は鋼製等の排水管を上記集水孔５へ挿入し、集水孔５の孔縁と排水管との隙間をコーキング又は溶接により止水処理することにより背面水がライナープレート４の内面へ垂れ落ちることを防止して背面水と接触させない対応策が考えられ実施もされている。しかし、ライナープレート４の波部４ａ又は４ｂに設ける集水孔５は、例え集水井１の中心部から見た形状が円形でも、その実体は波部の形状に沿って複雑な三次元形状を呈するので、前記したような対応策では、集水井内周面に上記した如く多数設けられ集水孔の全体に対してコーキング材や溶接による止水処理を施すことは大変多くの労力を必要とし、例え熟練者であっても多くの手間が掛かって作業時間が長引き、長い工期と多額の工費を必要とするという問題点があった。
また、ライナープレート４の波部に設けられる複雑な形状の集水孔５へ水抜き栓を取り付ける技術である上記特許文献３には、水抜き栓の抜け止め機能として外側ストッパ面や内側ストッパ面による構成が開示されている。しかし、特許文献３はそもそも水抜き栓を取り付ける技術を開示した内容であって、ライナープレートの内面に背面水が接触しないようにライナープレート内側面の管材を延長する技術的思想を開示するものではない。そのためライナープレート内側面の管材を延長すると自重によるモーメントが増大し、大きな荷重が作用する場合にも、安定状態に取り付ける手段としては、前記外側ストッパ面や内側ストッパ面では不十分な構成である。 It is already known that the above-mentioned drainage well is effective in suppressing landslides as a result of actively collecting water from the backside water existing in the surrounding backside soil.
In the case of the liner plate water well 1 constructed by assembling the liner plate 4, the back water oozes out from the back soil side through the water collecting holes 5 provided in the liner plate 4 for the purpose of collecting back water. Since the back surface water is collected in the catchment well along the inner surface of the liner plate 4, the component contained in the back surface water and the back surface water causes the inner surface of the liner plate 4 below the position of the water collection hole 5. The phenomenon that foreign matters such as iron adhere or the corrosion of the inner surface of the liner plate progresses with the passage of time is known, and is listed as a problem to be solved.
That is, the back water that oozes from the natural ground side often contains acid and alkali components. Further, the back surface water that has oozed out of the water collecting holes 5 travels down the inner surface of the liner plate 4 to be in a wet state, and comes into contact with the air in the middle. As a result of repeating the phenomenon such as drying when the amount of exudation is small, the anticorrosion treatment (hot dip galvanization, etc.) applied to the inner surface of the exudation area of the back water in the liner plate 4 is eroded, and corrosion (rusting) It has been pointed out that the problem is that
Conventionally, as a countermeasure, a drain pipe made of steel or the like is inserted into the water collecting hole 5, and the gap between the hole edge of the water collecting hole 5 and the drain pipe is water-stopped by caulking or welding, so that the back water is liner Countermeasures that prevent dripping onto the inner surface of the plate 4 and prevent contact with the back surface water have been considered and implemented. However, the water collecting hole 5 provided in the wave portion 4a or 4b of the liner plate 4 has a complicated three-dimensional shape along the shape of the wave portion even if the shape seen from the central portion of the water collecting well 1 is circular. Therefore, in the countermeasures as described above, it is very labor-intensive to apply a water stop treatment by caulking material or welding to the entire water collection hole provided on the inner peripheral surface of the water collection well as described above. Even if it is an expert, there is a problem that it takes a lot of time and work, prolongs the working time, and requires a long construction period and a large construction cost.
Further, in Patent Document 3, which is a technique for attaching a drain plug to the water collecting hole 5 having a complicated shape provided in the wave portion of the liner plate 4, there is an outer stopper surface or an inner stopper surface as a function of preventing the drain plug from coming off. A configuration according to is disclosed. However, Patent Document 3 originally discloses a technique for attaching a drain plug, and does not disclose a technical idea of extending the pipe on the inner surface of the liner plate so that the back surface water does not contact the inner surface of the liner plate. Absent. Therefore, when the tube on the inner surface of the liner plate is extended, the moment due to its own weight increases, and even when a large load is applied, the outer stopper surface or the inner stopper surface is not sufficient as a means for mounting in a stable state.

本願発明の目的は、上記ライナープレート集水井のライナープレートが背面水の滲出に伴い集水孔の内面に腐食が発生し進行することを可及的に防止できる排水処理手段を提供することである。更に言えば、ライナープレートに設けた集水孔を通じて滲出する背面水が、ライナープレートの内面を濡らすことのないように、集水井の中心部に向かって背面水を導く排水構造と、及び同排水構造に好適に使用される排水用部材を提供することである。 An object of the present invention is to provide a wastewater treatment means capable of preventing as much as possible that the liner plate of the liner plate catchment well is corroded and progresses on the inner surface of the catchment hole due to the seepage of the back water. . More, rear water exuded through water collecting hole formed in the liner plate, so as not to wet the inner surface of the liner plate, and drainage structure for guiding the back surface water towards the center of the collecting well, and the It is providing the member for drainage used suitably for a drainage structure.

上記従来技術の課題を解決する手段として、請求項１に記載した発明に係るライナープレート集水井の背面水の排水構造は、
ライナープレートを筒形に組み立てて構築されたライナープレート集水井の前記ライナープレートの波部に、同集水井の中心から水平方向に見て円形に設けられた集水孔へ弾力性を有する背面水誘導管が挿入され、前記集水孔の周端全周に対し前記背面水誘導管１０が弾性変形して密着する態様で止水状態に取り付けられて成り、
前記背面水誘導管１０は、集水孔の周端５ａに沿うように形成された段部１１を外周面の前記ライナープレートよりも集水井１の内方側に備え、
前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えており、
前記段部１１の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図８参照）。 As a means for solving the problems of the prior art, the drainage structure of the back water of the liner plate catchment well according to the invention described in claim 1 is:
Back water that has elasticity to the water collecting holes provided in a circular shape when viewed in the horizontal direction from the center of the collecting well at the corrugated portion of the liner plate collecting well constructed by assembling the liner plate into a cylindrical shape A guide pipe is inserted, and the back water guide pipe 10 is elastically deformed and closely attached to the entire circumference of the water collecting hole, and is attached in a water-stopped state.
The back water guide pipe 10 includes a step portion 11 formed along the peripheral end 5a of the water collecting hole on the inner side of the water collecting well 1 than the liner plate on the outer peripheral surface,
A small-diameter back surface water receiving pipe portion 12 protruding from the position of the step portion 11 toward the back soil side of the catchment well 1;
The back surface water discharge pipe portion 13 that protrudes from the position of the step portion 11 toward the inside of the water collection well 1 protrudes to the inside of the water collection well from the wave portion of the liner plate, and the back surface water to be discharged is the inner surface of the liner plate 4. It is characterized in that it is provided with a length that does not have a risk of wetting (see FIG. 8).

請求項２に記載した発明に係るライナープレート集水井の背面水の排水構造は、
ライナープレート４を筒形に組み立てて構築されたライナープレート集水井１の前記ライナープレート４の波部４ａ又は４ｂに、同集水井１の中心から水平に見て円形になるように設けられた集水孔５へ弾力性を有する背面水誘導管１０が挿入され、前記集水孔５の周端５ａの全周に対し前記背面水誘導管１０が弾性変形して密着する態様で止水状態に取り付けられて成り、
前記背面水誘導管１０は、集水孔５の周端５ａに沿うように形成された段部１１を外周面部の前記ライナープレートよりも集水井１の内方側に備え、
前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えていると共に、この背面水受け入れ管部１２の外周面に前記段部１１と相対峙して集水孔５の孔縁に隣接する少なくとも１個の突起部１４を備えており、
前記段部１１の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図９参照）。 The drainage structure of the back water of the liner plate catchment well according to the invention described in claim 2 is:
A collection provided in a wave shape 4 a or 4 b of the liner plate 4 of the liner plate water well 1 constructed by assembling the liner plate 4 into a cylindrical shape so as to be circular when viewed from the center of the water well 1. An elastic back water guide tube 10 is inserted into the water hole 5, and the back water guide tube 10 is elastically deformed and closely attached to the entire circumference of the peripheral end 5 a of the water collection hole 5. Attached and made
The back water guide pipe 10 includes a step portion 11 formed along the peripheral end 5a of the water collecting hole 5 on the inner side of the water collecting well 1 than the liner plate on the outer peripheral surface portion,
A small-diameter back surface water receiving pipe portion 12 protruding from the position of the step portion 11 toward the back soil side of the catchment well 1 is provided, and the outer surface of the back surface water receiving pipe portion 12 is connected to the step portion 11. It is provided with at least one protrusion 14 facing the hole edge of the water collecting hole 5 oppositely,
The back surface water discharge pipe portion 13 that protrudes from the position of the step portion 11 toward the inside of the water collection well 1 protrudes to the inside of the water collection well from the wave portion of the liner plate, and the back surface water to be discharged is the inner surface of the liner plate 4. It is characterized in that it is provided with a length that does not have a risk of wetting (see FIG. 9).

請求項３に記載した発明に係るライナープレート集水井の背面水の排水構造は、
ライナープレート４を筒形に組み立てて構築されたライナープレート集水井１の前記ライナープレート４の波部４ａ又は４ｂに、同集水井１の中心から水平に見て円形になるように設けられた集水孔５へ弾力性を有する背面水誘導管１０が挿入され、前記集水孔５の周端５ａの全周に対し前記背面水誘導管１０が弾性変形して密着する態様で止水状態に取り付けられて成り、
前記背面水誘導管１０は、外周面部に前記ライナープレート４の集水孔５の周端５ａに沿うように形成されて前記集水孔５の周端５ａが嵌る溝部１５を備えており、
前記溝部１５の位置から集水井１の背面土側に向かって突き出る背面水受け入れ管部１２を備えており、
前記溝部１５の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図５等を参照）。 The drainage structure of the back water of the liner plate catchment well according to the invention described in claim 3 is:
A collection provided in a wave shape 4 a or 4 b of the liner plate 4 of the liner plate water well 1 constructed by assembling the liner plate 4 into a cylindrical shape so as to be circular when viewed from the center of the water well 1. An elastic back water guide tube 10 is inserted into the water hole 5, and the back water guide tube 10 is elastically deformed and closely attached to the entire circumference of the peripheral end 5 a of the water collection hole 5. Attached and made
The back surface water guide pipe 10 includes a groove portion 15 formed on the outer peripheral surface portion along the peripheral end 5a of the water collecting hole 5 of the liner plate 4 and into which the peripheral end 5a of the water collecting hole 5 is fitted.
A rear water receiving pipe portion 12 that protrudes from the position of the groove portion 15 toward the back soil side of the drainage well 1;
The back surface water discharge pipe portion 13 that protrudes from the position of the groove portion 15 toward the inside of the water collection well 1 protrudes to the inside of the water collection well rather than the wave portion of the liner plate, and the back surface water that discharges the inner surface of the liner plate 4. It is characterized by a structure provided with a length that does not cause it to get wet (see FIG. 5).

請求項４に記載した発明に係る排水用部材は、
請求項１に記載したライナープレート集水井１の背面水の排水構造に使用される部材で、ライナープレート集水井１を構成するライナープレート４の波部４ａ又は４ｂに、同集水井１の中心から水平に見て円形になるように設けられた集水孔５の周端５ａの全周に対し弾性変形して密着する態様で止水状態に取り付けられる、弾力性を有する背面水誘導管１０であって、
外周面部に前記ライナープレート４の内側面の集水孔５の周端５ａに沿うように形成された段部１１を備え、
前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えており、
前記段部１１の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図８参照）。 The drainage member according to the invention described in claim 4 is:
The member used for the drainage structure of the back water of the liner plate catchment well 1 according to claim 1, wherein the wave portion 4 a or 4 b of the liner plate 4 constituting the liner plate catchment well 1 is placed from the center of the catchment well 1. An elastic back water guide tube 10 that is attached in a water-stopping state in such a manner that it is elastically deformed and closely attached to the entire circumference of the peripheral end 5a of the water collecting hole 5 provided to be circular when viewed horizontally. There,
The outer peripheral surface portion includes a step portion 11 formed along the peripheral end 5a of the water collecting hole 5 on the inner surface of the liner plate 4;
A small-diameter back surface water receiving pipe portion 12 protruding from the position of the step portion 11 toward the back soil side of the catchment well 1;
The back surface water discharge pipe portion 13 that protrudes from the position of the step portion 11 toward the inside of the water collection well 1 protrudes to the inside of the water collection well from the wave portion of the liner plate, and the back surface water to be discharged is the inner surface of the liner plate 4. It is characterized in that it is provided with a length that does not have a risk of wetting (see FIG. 8).

請求項５に記載した発明に係る排水用部材は、
請求項２に記載したライナープレート集水井１の背面水の排水構造に使用される部材で、ライナープレート集水井１の前記ライナープレート４の波部４ａ又は４ｂに同集水井１の中心から水平に見て円形になるように設けられた集水孔５の周端５ａの全周に対し弾性変形して密着する態様で止水状態に取り付けられる、弾力性を有する背面水誘導管１０であって、
外周面部に前記ライナープレート４の内面側へ集水孔５の周端５ａに沿うように形成された段部１１を備え、
前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えていると共に、前記背面水受け入れ管部１２の外周面に前記段部１１と相対峙して集水孔の孔縁に隣接する少なくとも１個の突起部１４を備えており、
前記段部１１の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図９参照）。 The drainage member according to the invention described in claim 5 is:
The member used for the drainage structure of the back water of the liner plate catchment well 1 according to claim 2, wherein the wave portion 4 a or 4 b of the liner plate 4 of the liner plate catchment well 1 extends horizontally from the center of the catchment well 1. It is a back water guide tube 10 having elasticity and attached in a water-stopping state in a mode of being elastically deformed and closely attached to the entire circumference of the peripheral end 5a of the water collecting hole 5 provided to be circular when viewed. ,
Provided with a step portion 11 formed on the outer peripheral surface portion along the peripheral end 5a of the water collecting hole 5 toward the inner surface side of the liner plate 4;
A small-diameter back surface water receiving pipe portion 12 protruding from the position of the step portion 11 toward the back soil side of the drainage well 1 is provided, and the step portion 11 and the outer surface of the back surface water receiving pipe portion 12 are combined with each other. It has at least one protrusion 14 facing and adjacent to the edge of the water collecting hole,
The back surface water discharge pipe portion 13 that protrudes from the position of the step portion 11 toward the inside of the water collection well 1 protrudes to the inside of the water collection well from the wave portion of the liner plate, and the back surface water to be discharged is the inner surface of the liner plate 4. It is characterized in that it is provided with a length that does not have a risk of wetting (see FIG. 9).

請求項６に記載した発明に係る排水用部材は、
請求項３に記載したライナープレート集水井１の背面水の排水構造に使用される部材で、ライナープレート集水井１を構成するライナープレート４の波部４ａ又は４ｂに同集水井１の中心から水平に見て円形になるように設けられた集水孔５の周端５ａの全周に対し弾性変形して密着する態様で止水状態に取り付けられる、弾力性を有する背面水誘導管１０であって、
外周面部に前記ライナープレート４の集水孔５の周端５ａに沿うように形成された溝部１５を備えており、
前記溝部１５の位置から集水井１の背面土側に向かって突き出る背面水受け入れ管部１２を備えており、
前記溝部１５の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、ライナープレートの波部よりも集水井の内部へ突き出ており、放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えている構成を特徴とする（図５等を参照）。 The drainage member according to the invention described in claim 6 is:
It is a member used for the drainage structure of the back surface water of the liner plate water well 1 according to claim 3, and is horizontal from the center of the water well 1 to the wave portion 4 a or 4 b of the liner plate 4 constituting the liner plate water well 1. It is an elastic back surface water guide tube 10 that is attached in a water-stopping state in a state of being elastically deformed and closely attached to the entire circumference of the peripheral end 5a of the water collecting hole 5 provided to be circular as viewed in FIG. And
The outer peripheral surface portion is provided with a groove portion 15 formed along the peripheral end 5a of the water collecting hole 5 of the liner plate 4;
A rear water receiving pipe portion 12 that protrudes from the position of the groove portion 15 toward the back soil side of the drainage well 1;
The back surface water discharge pipe portion 13 that protrudes from the position of the groove portion 15 toward the inside of the water collection well 1 protrudes to the inside of the water collection well rather than the wave portion of the liner plate, and the back surface water that discharges the inner surface of the liner plate 4. It is characterized by a structure provided with a length that does not cause it to get wet (see FIG. 5 and the like).

請求項７に記載した発明に係る排水用部材は、請求項４〜６のいずれか一に記載した背面水誘導管１０において、
集水孔５の位置から集水井１の背面土側に向かって突き出る背面水受け入れ管部１２の先端面は管軸と直角に形成され、又は管軸に対して上方側が短い受け口１９の傾斜面に形成されていることを特徴とする（図１１、図１２を参照）。 The drainage member according to the invention described in claim 7 is the back water guide pipe 10 according to any one of claims 4 to 6,
The front end surface of the back water receiving pipe portion 12 protruding from the position of the water collecting hole 5 toward the back soil side of the water collecting well 1 is formed at right angles to the pipe axis, or the inclined surface of the receiving port 19 whose upper side is short with respect to the pipe axis. (See FIGS. 11 and 12).

請求項８に記載した発明に係る排水用部材は、請求項７に記載した背面水誘導管において、
集水孔５の位置から集水井１の背面土側に向かって突き出る背面水受け入れ管部１２の先端面が管軸と直角に形成された場合には、その頂面部に、先端面から管軸方向へ一定長さの受水用切り欠き部１６が形成されている構成を特徴とする（図１０参照）。 The drainage member according to the invention described in claim 8 is the back water guide pipe described in claim 7,
When the front end surface of the back water receiving pipe section 12 from the position of the water collection holes 5 protrude toward the rear earth side of the collecting well 1 is formed at right angles to the tube axis, on its top wall, the tube axis from the distal end surface The structure is characterized in that a notch 16 for receiving water having a certain length is formed in the direction (see FIG. 10).

請求項９に記載した発明に係る排水用部材は、請求項４〜６のいずれか一に記載した背面水誘導管１０において、
段部１１又は溝部１５の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、当該背面水誘導管１０と継手管１７を介して接続された別異の管体１８により、放水する背面水がライナープレート４の内面を濡らす虞がない長さで形成されている構成を特徴とする（図６、図７参照）。 The drainage member according to the invention described in claim 9 is the back water guide pipe 10 according to any one of claims 4 to 6,
The back surface water discharge pipe portion 13 protruding toward the inside of the water collecting well 1 from the position of the step portion 11 or the groove portion 15 is provided by a different pipe body 18 connected to the back surface water guide pipe 10 via the joint pipe 17 . A feature is that the back water to be discharged is formed with such a length that there is no possibility of wetting the inner surface of the liner plate 4 (see FIGS. 6 and 7).

請求項１〜３に記載した発明に係るライナープレート集水井の背面水の排水構造は、集水井１の構築後に同集水井１の内部から排水用部材である背面水誘導管１０を各集水孔５へ差し入れるだけの操作で止水状態に取り付けることができるから、狭い集水井内の窮屈な作業でも施工が容易で取り付け作業の能率を高められる。
即ち、前記背面水誘導管１０は、その弾力性を利用することで集水孔５への差し入れ操作及び止水状態の取り付けを、格別の熟練を要することなく容易に手早く行える。しかも均質な品質で作業を進めることができ、施工性が良い。したがって、工期の短縮及び工費の削減効果並びに施工管理の容易性が得られる。
そして、本発明に係るライナープレート集水井の背面水の排水構造によれば、集水井１の背面土から滲み出した背面水は、背面水誘導管１０が効率よく受け入れ、放水する背面水がライナープレート４の内面を濡らす虞がない長さ、例えば５５０ｍｍ程度に長い背面水放出管部１３によって集水井１の中心側へ導き放水するから、背面水がライナープレート４の内面側を伝い落ちて濡らす不都合な現象は可及的に防止でき、ライナープレート４の内面側の腐食を防止でき、長い耐用寿命を期待できる。 The drainage structure of the backside water of the liner plate catchment well according to the invention described in claims 1 to 3 is configured to collect the backwater guide pipes 10 that are drainage members from the inside of the catchment well 1 after the construction of the catchment well 1. Since it can be attached in a water-stopped state by simply inserting it into the hole 5, it is easy to construct even in a cramped work in a narrow water collection well, and the efficiency of the attaching work can be increased.
That is, the back surface water guide tube 10 can be easily and quickly inserted into the water collecting hole 5 and attached in a water stop state by utilizing its elasticity without requiring any special skill. In addition, work can be performed with uniform quality and workability is good. Therefore, the construction period can be shortened, the construction cost can be reduced, and the construction management can be easily performed.
And according to the drainage structure of the back water of the liner plate water collection well which concerns on this invention, the back water which exuded from the back soil of the water collection well 1 is efficiently received by the back water guide pipe 10, and the back water discharged is the liner. fear no length to wet the inner surface of the plate 4, because to discharge water guided toward the center of the collecting well 1 by a long rear water discharge pipe 13, for example, about 550 mm, wetting back water falling down along the inner surface of the liner plate 4 Inconvenient phenomena can be prevented as much as possible, corrosion on the inner surface side of the liner plate 4 can be prevented, and a long service life can be expected.

請求項４〜９に記載した発明に係る排水用部材（背面水誘導管１０）は、背面水に含まれる酸やアルカリ成分などに強い材質のゴム或いはシリコン、合成樹脂等の弾力性（又は可撓性）を有する材料で安価に大量生産することに適する。また、前記弾力性を利用してライナープレート集水井１の集水孔５へ差し入れる操作のみにて簡単、確実にライナープレート４へ接触する部分を止水状態に取り付けることができ、使い勝手に優れる。
即ち、ライナープレート４の集水孔５の周端５ａに沿うように形成された段部１１、又は前記段部１１と相対峙するように背面水誘導管１０外周面の好ましくは上面側に位置させる少なくとも１個の突起１４を備え、若しくは前記集水孔５の周端５ａに沿う形状に形成され同集水孔５の孔内へライナープレート４と接触する部分を止水状態に嵌め込める溝部１５を備えた構成であるから、ライナープレート４の集水孔５へ止水状態に取り付ける作業を容易、確実に行うことができ、上記の排水構造を容易に実現できる。そして、一旦集水孔５へ前記の如くに取り付けると、前記段部１１がライナープレート４へ当接する効果、そして、突起１４がライナープレート４へ当接する作用との組み合わせ効果、或いは溝部１５の嵌め込み状態でライナープレート４の集水孔５の周端５ａへ弾性的に当接する接触効果により、特に背面水放出管部１３の垂れ下がりを防ぎ、長期にわたり堅固で安定した取り付け状態を維持し排水構造を長期間有効に機能させることができる。 The drainage member (back water guide pipe 10) according to the inventions described in claims 4 to 9 is made of elastic (or acceptable) such as rubber, silicon, synthetic resin, etc. that are resistant to acids and alkali components contained in the back water. It is suitable for mass production at low cost with a material having flexibility. Further, the portion that contacts the liner plate 4 can be attached to the liner plate 4 in a water-stopped state simply and surely by simply inserting it into the water collecting hole 5 of the liner plate water collecting well 1 using the elasticity, and it is excellent in usability. .
That is, the step portion 11 formed along the peripheral end 5a of the water collecting hole 5 of the liner plate 4 or the outer peripheral surface of the rear water guide tube 10 is preferably located on the upper surface side so as to face the step portion 11. A groove portion provided with at least one protrusion 14 to be formed, or formed in a shape along the peripheral end 5a of the water collecting hole 5 so as to fit a portion contacting the liner plate 4 into the water collecting hole 5 in a water-stopping state. Since it is the structure provided with 15, the operation | work attached to the water collecting hole 5 of the liner plate 4 in a water stop state can be performed easily and reliably, and said drainage structure can be implement | achieved easily. Once attached to the water collecting hole 5 as described above, the combined effect of the effect that the step 11 abuts against the liner plate 4 and the action that the projection 14 abuts against the liner plate 4, or the fitting of the groove 15. The contact effect of elastically contacting the peripheral end 5a of the water collecting hole 5 of the liner plate 4 in the state prevents the sag of the back water discharge pipe part 13 in particular, and maintains a solid and stable attachment state for a long time. It can function effectively for a long time.

ライナープレート集水井の設置例を示した説明図である。It is explanatory drawing which showed the example of installation of the liner plate water well. ライナープレート集水井の更に具体的な設置構造を半分断面にして示した立面図である。It is the elevation which showed the more specific installation structure of the liner plate catchment well in the half section. 図２に示したライナープレート集水井の平面図である。It is a top view of the liner plate water well shown in FIG. Ａ、Ｂはライナープレートの集水孔の配置例を示した正面図である。A and B are front views showing examples of arrangement of water collecting holes in the liner plate. ライナープレートの凸波部の集水孔へ背面水誘導管を取り付けた状態を示した要部の断面図である。It is sectional drawing of the principal part which showed the state which attached the back surface water induction pipe to the water collecting hole of the convex wave part of a liner plate. 集水孔の周端形状を示す斜視図である。It is a perspective view which shows the peripheral end shape of a water collection hole. Ａ図に指示したｂ円部の拡大断面図である。It is an expanded sectional view of b circle part indicated to A figure. 背面水誘導管の主要部の斜視図である。It is a perspective view of the principal part of a back surface water guide pipe. Ａはライナープレートの集水孔へ構成の異なる背面水誘導管を取り付けた状態を実施例２として示した要部の断面図、Ｂは前記Ａ図に指示したｂ円部の拡大断面図である。A is a cross-sectional view of a main part showing a state in which a rear water guide pipe having a different configuration is attached to a water collecting hole of a liner plate as Example 2, and B is an enlarged cross-sectional view of a b-circle part indicated in FIG. . Ａはライナープレートの凹波部の集水孔へ背面水誘導管を取り付けた状態を実施例３として示した要部の断面図、Ｂは同背面水誘導管の主要部の斜視図である。である。A is a cross-sectional view of the main part showing a state where the back surface water guide pipe is attached to the water collecting hole of the concave wave portion of the liner plate as Example 3, and B is a perspective view of the main part of the back surface water guide pipe. It is. 図６Ｃと同じ視点で、溝部を有さず、代わりに溝部の内側壁に相当する段部のみを備えた背面水誘導管を一部破断して示した側面図である。6C is a side view showing a partially broken rear water guide pipe that does not have a groove and includes only a step corresponding to the inner wall of the groove instead from the same viewpoint as FIG. 6C. FIG. 図８と同じ視点で、溝部を有さず、代わりに段部と突起の組み合わせで構成した背面水誘導管を一部破断して示した側面図である。FIG. 9 is a side view showing a partially broken back water guide pipe that does not have a groove portion and is composed of a combination of a step portion and a protrusion instead of the groove portion. Ａ、Ｂは図６に示した背面水誘導管のみを示した平面図と、一部破断した側面図である。A and B are the top view which showed only the back surface water guide pipe | tube shown in FIG. 6, and the side view which fractured | ruptured partially. Ａ、Ｂは図６に示した背面水誘導管について受水用切り欠き部の代わりに背面水受け入れ管部の先端面を上方側が短い受け傾斜面に形成した背面水誘導管を示す平面図と、側面図である。FIGS. 6A and 6B are plan views showing a back surface water guide tube in which the tip surface of the back surface water receiving tube portion is formed as a receiving inclined surface on the upper side instead of the notch portion for receiving water in the back surface water guide tube shown in FIG. FIG. Ａ、Ｂは図６に示した背面水誘導管について背面水受け入れ管部の先端部に切り欠きを形成しない実施例を示した平面図と側面図である。A and B are the top views and side views which showed the Example which does not form a notch in the front-end | tip part of a back surface water acceptance pipe part about the back surface water induction pipe | tube shown in FIG.

本発明に係るライナープレート集水井の背面水の排水構造は、ライナープレート４を筒形に組み立てて構築されたライナープレート集水井１の前記ライナープレート４の波部４ａ又は４ｂに、同集水井１の中心から水平に見て円形になるように設けられた集水孔５へ、排水用部材として弾力性を有する背面水誘導管１０を挿入し、同集水孔５の周端５ａの全周に対し前記背面水誘導管１０を弾性変形させて接触させ密着させる態様で止水状態に取り付けて構成する。
前記背面水誘導管１０は、外周面部に前記ライナープレート４の内面側へ集水孔５の周端５ａに沿うように形成された段部１１を備えている。
前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えている。
また、前記段部１１の位置から集水井１の内部に向かって放水する背面水がライナープレート４の内面を濡らす虞がない長さで備えた構成で実施する（図８参照）。 The drainage structure of the back water of the liner plate catchment well according to the present invention is formed on the wave well 4a or 4b of the liner plate 4 of the liner plate catchment well 1 constructed by assembling the liner plate 4 into a cylindrical shape. A water drainage pipe 10 having elasticity as a drainage member is inserted into a water collecting hole 5 provided to be circular when viewed horizontally from the center of the water collecting hole 5, and the entire circumference of the peripheral end 5a of the water collecting hole 5 is inserted. On the other hand, the back surface water guide tube 10 is elastically deformed and brought into contact with and in close contact with the water stop state.
The back surface water guide tube 10 includes a step portion 11 formed on the outer peripheral surface portion so as to extend along the peripheral end 5 a of the water collecting hole 5 toward the inner surface side of the liner plate 4.
A small-diameter back surface water receiving pipe portion 12 that protrudes from the position of the step portion 11 toward the back soil side of the catchment well 1 is provided.
Moreover, it implements with the structure provided with the length which the back surface water discharged toward the inside of the water collection well 1 from the position of the said step part 11 does not have the possibility of wetting the inner surface of the liner plate 4 (refer FIG. 8).

異なる排水用部材（背面水誘導管１０）の構成として、外周面部に前記ライナープレート４の内面側へ、集水孔５の周端５ａに沿うように形成された段部１１を備え、前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２を備えていると共に、この背面水受け入れ管部１２の外周面の好ましくは上面側に、前記段部１１と相対峙する少なくとも１個の突起部１４を備えている。更に前記段部１１の位置から集水井１の内部に向かって突き出る背面水放出管部１３は、放水する背面水がライナープレート４の内面を濡らす虞がない長さで構成しても実施される（図９参照）。
或いは更に異なる排水用部材（背面水誘導管１０）として、外周面部に前記ライナープレート４の集水孔５の周端に沿うように形成された溝部１５を備え、同集水孔５の周端５ａの全周に対し弾性変形させ密着する態様で止水状態に嵌め込まれる構成であり、前記溝部１５の位置から集水井１の背面土側に向かって突き出る背面水受け入れ管部１２を備えている。更に前記溝部１５の位置から集水井１の内部に向かって放水する背面水が、ライナープレート４の内面を濡らす虞がない長さに構成した排水用部材でも同様に実施出来る（図５等を参照）。 As a configuration of a different drainage member (back surface water guide pipe 10), a step portion 11 formed on the outer peripheral surface portion along the peripheral end 5a of the water collecting hole 5 is provided on the inner surface side of the liner plate 4, and the step A small-diameter back surface water receiving pipe portion 12 projecting from the position of the portion 11 toward the back soil side of the drainage well 1 is provided, and the step is preferably provided on the upper surface side of the outer peripheral surface of the back surface water receiving pipe portion 12. At least one protrusion 14 that faces the portion 11 is provided. Further back water discharge pipe 13 which butt out I suited from a position inside the collecting well 1 of the stepped portion 11, even if back water to water discharge is constituted by a fear no length to wet the inner surface of the liner plate 4 Implemented (see FIG. 9).
Alternatively, as a different drainage member (back water guide pipe 10), the outer peripheral surface portion is provided with a groove portion 15 formed along the peripheral end of the water collecting hole 5 of the liner plate 4, and the peripheral end of the water collecting hole 5 is provided. 5a is configured to be fitted into a water-stopping state in an elastically deformed and closely contacting manner with respect to the entire circumference of 5a, and includes a back water receiving pipe portion 12 protruding from the position of the groove portion 15 toward the back soil side of the water collecting well 1. . Further, the groove 15 back water you discharge water toward the inside position from the collecting well 1 of, can be implemented similarly in the drainage member configured to fear no length to wet the inner surface of the liner plate 4 (FIG. 5, etc. reference).

次に、本発明を図５Ａ〜Ｃに示した実施例１に基づいて説明する。
本実施例１に係るライナープレート集水井１の背面水の排水構造及び排水用部材は、一例として図４Ａ又はＢに示したような配列で、波部４ａ又は４ｂに、集水井１の中心から水平方向に見て円形に設けられた集水孔５を有するライナープレート４を用い、例えば図１或いは図２に例示した如く筒形に組み立ててライナープレート集水井１を構築する。この場合に、各ライナープレート４の前記集水孔５へ、排水用部材として、弾力性（及び／又は可撓性）を有する背面水誘導管１０を、その要所を弾性変形させて前記集水孔５の周端５ａ（図５Ｂを参照）の全周に対し密着する態様で止水状態に取り付けて実施される。
因みに図５に示す実施例１は、ライナープレート４の波形が集水井１の内方に向かって凸の波部４ａに設けられた集水孔５へ、排水用部材である背面水誘導管１０をライナープレート４との接触部分が止水状態となるように取り付けた構成を示している。
なお、後述する図６と図７の対比で明らかなように、本発明の実施例は、集水井１の内方に向かって凸の波部４ａへ背面水誘導管１０を取り付ける場合と、逆に集水井１の外方に向かって凸の波部４ｂへ背面水誘導管１０を取り付ける場合とに大別されるが、各実施例の構成に実質的な差異点はないことを予め申し添える。
また、ライナープレート４の波形部４ａ又は４ｂに、集水井１の中心から水平に見て円形になるように集水孔５を設ける手段としては、既往技術として知られるプレス加工、或いはレーザー加工法やプラズマ加工法の応用により実施することが出来る。 Next, this invention is demonstrated based on Example 1 shown to FIG.
The drainage structure and drainage member for the back water of the liner plate catchment well 1 according to the first embodiment are arranged as shown in FIG. 4A or B as an example, and the center of the catchment well 1 is placed in the wave portion 4a or 4b. A liner plate water well 1 is constructed by using a liner plate 4 having a water collecting hole 5 provided in a circular shape when viewed in the horizontal direction, for example, as shown in FIG. 1 or FIG . In this case, the water collecting hole 5 of each liner plate 4 is elastically deformed at its essential point as the drainage member as a drainage member, and the water collecting hole 5 of the liner plate 4 is elastically deformed. It implements by attaching to a water stop state in the aspect closely_contact | adhered with respect to the perimeter of the peripheral end 5a (refer FIG. 5B) of the water hole 5. FIG.
Incidentally, in the first embodiment shown in FIG. 5, the back surface water guide pipe 10, which is a drainage member, is provided to the water collection hole 5 provided in the wave portion 4 a having the corrugated liner plate 4 protruding inward of the water collection well 1. The structure which attached so that a contact part with the liner plate 4 may be in a water stop state is shown.
6 and 7, which will be described later, the embodiment of the present invention is opposite to the case where the back surface water guide pipe 10 is attached to the wave portion 4a that protrudes inward of the water collecting well 1. The case where the rear surface water guide pipe 10 is attached to the wave portion 4b that protrudes outwardly from the water collecting well 1 is roughly divided, but it should be noted in advance that there is no substantial difference in the configuration of each embodiment. .
Further, a wave shape portion 4a or 4b of the liner plate 4, as a means of providing a water collecting hole 5 so that the circular when viewed horizontally from the center of the collecting well 1, pressing, known as history technique, or laser processing It can be carried out by applying the plasma processing method or plasma processing method.

上記の排水用部材として用いる弾力性（及び／又は可撓性）を有する背面水誘導管１０は、背面水により腐食され難い材質、例えばゴムやシリコン、合成樹脂等々の材料を用いて成形することができる。
図５に示した実施例１の場合、ライナープレート４は、厚さ２．７ｍｍの鋼板に集水井１の内面から見て３山の波付け処理をして縦幅寸法を５００ｍｍに成形すると共に、その波部４ａ、４ｂに集水孔５を設けた後に、溶融亜鉛メッキなどをライナープレート４へ施している。集水孔５を集水井１の中心側から見た円形の口径が５０ｍｍである場合に、背面水誘導管１０は、硬度が４０〜７０度のゴムにより、一例として外径を５８ｍｍ、内径は４８ｍｍ、集水孔５の周端５ａと密着させる部分の外径は５２ｍｍ、肉厚５ｍｍの管体として成形されている。
そして、同管体の外周面部には、図５Ｃ、Ｄに詳示した如く、上記ライナープレート４に設けられた集水孔５の周端５ａ（直接的には集水孔５の内周面を指すが、孔縁の意味も含むことを申し添える。）に沿うように三次元形状（図５Ｄ参照）に形成した溝部１５が、前記集水孔５の孔内へ止水状態に嵌め込めるように、次のような構成で設けられている（請求項３、６の発明）。
即ち、溝部１５の深さは、上記の寸法仕様において３ｍｍ程度とされ、溝底の厚さは２ｍｍ程度とされている。
この溝部１５の開口部幅（最大溝幅）は１３ｍｍとし、集水孔５が複雑な三次元形状を呈するのに対応して、同集水孔５の全周端５ａに沿ってその孔内へ止水状態に嵌め込まれる余裕が確保されている。 The back surface water guide tube 10 having elasticity (and / or flexibility) used as the drainage member is molded using a material that is not easily corroded by the back surface water, such as rubber, silicon, and synthetic resin. Can do.
In the case of Example 1 shown in FIG. 5, the liner plate 4 is formed in a steel plate having a thickness of 2.7 mm by corrugating three ridges as viewed from the inner surface of the drainage well 1 to form a vertical width dimension of 500 mm. After the water collecting holes 5 are provided in the wave portions 4a and 4b, the galvanizing or the like is applied to the liner plate 4. When the circular bore diameter of the water collecting hole 5 viewed from the center side of the water collecting well 1 is 50 mm, the back surface water guiding pipe 10 is made of rubber having a hardness of 40 to 70 degrees. 48 mm, the outer diameter of the portion to be in close contact with the peripheral end 5a of the water collecting hole 5 is formed as a tubular body having a thickness of 52 mm and a thickness of 5 mm.
Further, as shown in detail in FIGS. 5C and 5D, the outer peripheral surface portion of the tube body has a peripheral end 5 a of the water collecting hole 5 provided in the liner plate 4 (directly the inner peripheral surface of the water collecting hole 5). However, the groove 15 formed in a three-dimensional shape (see FIG. 5D) along the hole edge can be fitted into the water collecting hole 5 in a water-stopping state. Thus, it is provided in the following configuration (inventions of claims 3 and 6).
That is, the depth of the groove 15 is about 3 mm in the above dimensional specification, and the thickness of the groove bottom is about 2 mm.
The opening width (maximum groove width) of the groove portion 15 is 13 mm, and the water collecting hole 5 has a complicated three-dimensional shape. A margin for fitting into the water-stopping state is secured.

上記集水孔５の周端５ａに沿って形成される溝部１５の形状は、具体的には図５Ｄの場合であれば、背面水誘導管１０の上面で背面土方向へ凸の弧状をなし、前記上面から側面へかけて緩やかに集水井１の中心方向へ凸の弧状となり、前記側面から底面へは緩やかに背面土方向へ曲がって形成され、前記底面で背面土方向へ凸の弧状となる。
また、溝部１５の具体的形状は、図７Ｂの場合であれば、背面水誘導管１０の上面で集水井１の中心方向へ凸の弧状をなし、前記上面から側面へかけて緩やかに背面土の方向へ曲がって形成され、同側面で背面土方向へ凸の弧状となり、前記側面から底面へは緩やかに集水井の中心方向へ曲がって形成され、同底面では集水井の中心方向へ凸の弧状に形成されている。
上記のとおり、溝部１５は図５Ｄの場合、或いは図７Ｂの場合であっても、背面土方向へ曲がり、次には集水井１の中心方向へ曲がり、そして、再び背面土方向に曲がることを交互に繰り返す曲がり状態に形成され、背面水誘導管１０の外周面を一周して元の位置に戻る形態を呈する。 In the case of FIG. 5D, the shape of the groove 15 formed along the peripheral end 5a of the water collecting hole 5 is an arc shape convex toward the back soil direction on the upper surface of the back water guiding tube 10. And from the upper surface to the side surface, the arc gradually protrudes toward the center of the drainage well 1, and from the side surface to the bottom surface, the arc gently protrudes toward the back soil direction. Become.
Further, in the case of FIG. 7B, the specific shape of the groove portion 15 is an arc shape convex toward the center of the catchment well 1 on the upper surface of the rear water guide pipe 10, and gently spreads from the upper surface to the side surface. In the same side, it forms an arc that is convex in the direction of the back soil, and from the side to the bottom, it is gently bent in the direction of the center of the drainage well. It is formed in an arc shape.
As described above, in the case of FIG. 5D or FIG. 7B, the groove 15 bends toward the back soil, then bends toward the center of the drainage well 1, and bends again toward the back soil. It is formed in a bent state that repeats alternately, and takes a form that goes around the outer peripheral surface of the back surface water guide tube 10 and returns to the original position.

したがって、当該背面水誘導管１０は、その弾性を利用して必要な部分を適度に圧縮変形させつつ集水孔５の孔内へ嵌め込み、最終的に溝部１５を集水孔５の全周端５ａへ嵌め込むと、それだけで両者はきっちりと弾力的に密接（密着）して止水状態の取り付けを達成できて、他に何ら処置を施す必要も無いのである。この溝部１５が、ライナープレート４の波部４ａ、４ｂに形成された集水孔５の周端５ａに沿う特異な三次元形状であることは、およそ上記図５ＢとＤと、及び図７Ｂに例示した通りである。
上記した構成であるから、図５Ｃをはじめ図６Ｂ、図８、図９に例示したところからも理解出来るように、弾力性を有する背面水誘導管１０の要所を適度に圧縮変形させて集水孔５の中へ差し入れると、溝部１５の溝底が集水孔５の周端５ａの全周にわたり弾性変形した状態で密着（接触）すると共に、前記弾性変形に基づく反力Ｒが集水孔５の周端５ａの全周にわたり外向きに作用する態様で確実に止水状態の接触を実現するのである。 Therefore, the back surface water guide tube 10 is fitted into the hole of the water collecting hole 5 while appropriately compressing and deforming a necessary portion by using its elasticity, and finally the groove portion 15 is fitted to the entire peripheral end of the water collecting hole 5. When it is fitted into 5a, both of them can tightly and tightly (closely) closely contact each other to achieve the water-stopping attachment, and no other treatment is required. That the groove portion 15 has a unique three-dimensional shape along the peripheral end 5a of the water collecting hole 5 formed in the wave portions 4a and 4b of the liner plate 4 is approximately in FIGS. 5B and D and FIG. 7B. It is as illustrated.
Because of the above-described configuration, as can be understood from the examples illustrated in FIG. 5C, FIG. 6B, FIG. 8, and FIG. 9, the essential points of the elastic rear water guide tube 10 are collected by appropriately compressing and deforming. When inserted into the water hole 5, the groove bottom of the groove portion 15 comes into close contact (contacts) with the entire circumference of the peripheral end 5 a of the water collection hole 5 being elastically deformed, and a reaction force R based on the elastic deformation is collected. The contact in the water-stopping state is reliably realized in a mode in which the outer periphery acts on the entire circumference of the peripheral end 5 a of the water hole 5.

しかも当該背面水誘導管１０には、上記溝部１５の位置から、集水井１の背面土側に向かって突き出る背面水受け入れ管部１２が、上記した寸法仕様において約２４ｍｍの長さに形成されている。この背面水受け入れ管部１２の先端面部は、本実施例１の場合は管軸に対して直角な平面に形成されている。そこで背面土から滲み出る背面水の受け入れと集水機能を高める目的で、背面水受け入れ管部１２の上面部（使用態様として上面に位置させる部位）に、先端面から管軸方向に約１９ｍｍの長さに及ぶ切り欠き状スリット１６が、具体的には図５Ｄに示したようにＵ字形に形成され、背面水の受水効果を高める構成とされている。切り欠き状スリット１６の形状については、適度な受水効果を奏するかぎり、前記形状に限らないことを申し添える。
したがって、当該背面水誘導管１０を設置した近傍の背面土から滲み出る背面水は、背面水受け入れ管部１２の前記切り欠き状スリット１６などを通じて受け入れ、集水井１の内部へ排出する機能を効果的に発揮する。
背面水受け入れ管部１２はまた、背面水誘導管１０を集水孔５の孔内へ嵌め込んでライナープレート４へ取り付けると、必然的に集水井１の外周部の背面土へ突き当たる状態にもなる。その結果、背面土へ突き当たった背面水受け入れ管部１２によって背面水誘導管１０は背面土で固定して保持する状態となり、ライナープレート４への取り付け状態を安定化させる効果も奏する。 In addition, the back surface water guide tube 10 has a back surface water receiving tube portion 12 protruding from the position of the groove portion 15 toward the back soil side of the water collecting well 1 to have a length of about 24 mm in the above dimensional specification. Yes. In the case of the first embodiment, the front end surface portion of the back surface water receiving tube portion 12 is formed in a plane perpendicular to the tube axis. Therefore, for the purpose of enhancing the function of collecting and collecting water from the backside water that oozes out from the backside soil, about 19 mm in the tube axis direction from the front end surface is formed on the upper surface portion of the backwater receiving tube portion 12 (the portion located on the upper surface as a use mode) Specifically, the notch-like slit 16 extending over the length is formed in a U-shape as shown in FIG. 5D and is configured to enhance the water receiving effect of the back surface water. The shape of the notch-shaped slit 16 is not limited to the above-mentioned shape as long as an appropriate water receiving effect is obtained.
Therefore, the back surface water that oozes out from the back side soil in the vicinity where the back side water guiding pipe 10 is installed is received through the notched slit 16 or the like of the back side water receiving pipe part 12 and discharged to the inside of the drainage well 1. Demonstrate.
The back water receiving pipe portion 12 is also in a state where it inevitably hits the back soil of the outer peripheral portion of the water collecting well 1 when the back water guiding pipe 10 is fitted into the water collecting hole 5 and attached to the liner plate 4. Become. As a result, the back surface water guide tube 10 that hits the back surface soil is in a state where the back surface water guiding tube 10 is fixed and held by the back surface soil, and the effect of stabilizing the attachment state to the liner plate 4 is also achieved.

当該背面水誘導管１０は、上記溝部１５の位置（実質的に集水孔５の位置）から集水井１の内部に向かって一定の長さ突き出る背面水放出管部１３を備えている。この背面水放出管部１３の長さは、放水する面水がライナープレート４の内面を濡らす虞がない長さに設計され、本実施例１では約５５０ｍｍの長さとされている。
したがって、当該背面水誘導管１０をライナープレート集水井１の各集水孔５へ取り付けると、上記した如く背面水受け入れ管部１２で背面水を受け入れ、それを背面水放出管部１３が集水井１の内方へライナープレート４の内面を濡らすことのないように放出する。
よって、当該集水井１は地すべり抑制工としての機能を良く発揮する上に、背面水がライナープレート４の内面を濡らすことはないので、ライナープレート４の内面へ鉄分などの異物が付着したり、腐食が発生することを防止し、長期間の耐用寿命を維持することに大きく寄与する。
なお、上記構成の背面水誘導管１０は、上記溝部１５が、後述する実施例２〜４の段部１１や突起１４と同様に、各集水孔５への取り付け状態の長期安定性を確保できる。その安定化作用は、上記段落番号［００２４］において説明したように、集水井１の背面土側に向かって突き当たった背面水受け入れ管部１２が、背面土による固定・保持の作用を受けて、集水井１の内部に向かって突き出す背面水放出管部１３の重量、および同管内を流れる背面水の重量に起因する下向きモーメントの作用に対して抵抗する働きがあり、同背面水誘導管１０の上記取り付け状態の長期安定性が得られる。 The back surface water guide tube 10 includes a back surface water discharge tube portion 13 that protrudes from the position of the groove portion 15 (substantially the position of the water collecting hole 5) toward the inside of the water collecting well 1 by a certain length. The length of the back surface water discharge pipe portion 13 is designed such that the surface water to be discharged does not wet the inner surface of the liner plate 4, and is about 550 mm in the first embodiment.
Therefore, when the back surface water guide pipe 10 is attached to each water collecting hole 5 of the liner plate water collection well 1, the back water is received by the back water receiving pipe section 12 as described above, and the back water discharge pipe section 13 receives the back water. 1 is discharged inward so as not to wet the inner surface of the liner plate 4.
Therefore, on the screen well 1 to well function as landslides suppression Engineering, since the back water will not wet the inner surface of the liner plate 4, or adhered foreign matter such as iron to the inner surface of the liner plate 4, It greatly contributes to preventing the occurrence of corrosion and maintaining a long service life.
In addition, as for the back surface water induction pipe 10 of the said structure, the said groove part 15 ensures the long-term stability of the attachment state to each water collecting hole 5 similarly to the step part 11 and protrusion 14 of Examples 2-4 mentioned later. it can. As described in paragraph [0024] above, the stabilizing action is such that the back water receiving pipe portion 12 that has struck toward the back soil side of the catchment well 1 receives the action of fixing and holding by the back soil, The rear water discharge pipe portion 13 protruding toward the inside of the drainage well 1 and the function of resisting the action of a downward moment due to the weight of the back water flowing in the pipe, Long-term stability in the attached state can be obtained.

次に、図６に示した実施例２を説明する。この実施例２の構成の大部分は、上記実施例１とほぼ共通する。そこで以下には主に差異点について説明を進める。
図５Ａと図６Ａ、及び図５Ｃと図６Ｂを対比すると明かなとおり、本実施例２の場合は、背面水誘導管１０において、集水井１の内方に向かって突き出る背面水放出管部１３の長さは、放水する背面水がライナープレート４の内面を濡らす虞がない長さ、具体的には上記実施例１のものに比して短く、約７２ｍｍに形成されている。
このようにライナープレート４の内面を濡らすことなく放水する手段として、本実施例２の場合は、上記のように短い背面水放出管部１３の外側端の外周面に継手管１７が止水状態に密接に嵌められ、この継手管１７を利用してその他端側に、所要の長さを有する別異の管体１８が止水状態に一連に接続された構成を特徴とする（請求項９の発明）。
つまり、本実施例２によれば、継手管１７の他端側に、別異の長い管体１８を接続する構成としたので、管体１８の長さを、背面水がライナープレート４の内面を濡らすことのない長さに適宜に調節して用意し実施することが可能である。
よって、集水井１の内部に昇降用の梯子などの設備類が存在して、これらが内部放水の背面水で濡れたり、或いは梯子など設備類を使用する作業員に降りかかる不都合が懸念される場合に、前記不都合の解消を現場において自在に対応できる利便性を発揮する。
なお、図７Ａは、構成は殆ど図６Ａと共通するが、集水井１の外向きに凸の波部４ｂに設けた集水孔５へ背面水誘導管１０を取り付け実施例を示している。継手管１７の他端側に、別異の長い管体１８を接続した構成は図６Ａと共通する。
つまり、本発明の排水構造及び排水用部材は、ライナープレート４の波部が集水井１の内向きに凸か、外向きに凸かの別なく実施できる例を示している。 Next, Example 2 shown in FIG. 6 will be described. Most of the configuration of the second embodiment is almost the same as that of the first embodiment. Therefore, the explanation will be made mainly on the differences.
5A and 6A, and FIG. 5C and FIG. 6B, as is clear, in the case of the present Example 2, the back water discharge pipe portion 13 protruding toward the inside of the water collecting well 1 in the back water guide pipe 10 is used. the length of the fear that no length back water to discharge water wets the inner surface of the liner plate 4, the concrete shorter than that of the first embodiment, is formed to approximately 72 mm.
As a means for discharging water without wetting the inner surface of the liner plate 4 in this way, in the case of the second embodiment, the joint pipe 17 is in a water-stopping state on the outer peripheral surface of the outer end of the short back water discharge pipe portion 13 as described above. And another pipe body 18 having a required length is connected in series to a water-stopped state on the other end side using the joint pipe 17 (Claim 9). Invention).
That is, according to the second embodiment, since the different long pipe 18 is connected to the other end of the joint pipe 17, the length of the pipe 18 is set so that the back surface water is the inner surface of the liner plate 4. It is possible to prepare and carry out by appropriately adjusting the length so as not to wet.
Therefore, when there are facilities such as ladders for raising and lowering in the drainage well 1, and there is a concern that these may get wet with the back water of the internal water discharge or get down to workers who use the facilities such as ladders. Moreover, the convenience that can solve the inconvenience freely at the site is exhibited.
7A shows an embodiment in which the rear water guide pipe 10 is attached to the water collecting hole 5 provided in the wave portion 4b protruding outward of the water collecting well 1, although the configuration is almost the same as that of FIG. 6A. The configuration in which a different long pipe 18 is connected to the other end of the joint pipe 17 is the same as that in FIG. 6A.
That is, the drainage structure and drainage member of the present invention show an example that can be implemented regardless of whether the wave portion of the liner plate 4 is convex inward or outward in the drainage well 1.

次に、図８に示した実施例３を説明する。この実施例３に係る背面水誘導管１０の構成は、上記図５Ｃの実施例１と基本的に変わるところはない。
ただし、本実施例３に係る背面水誘導管１０は、上記実施例１の如く完全な溝部１５の構成は有さず、同溝部１５の一方（右側）の側壁と同様の構成で、前記ライナープレート４に設けた集水孔５の周端５ａに沿うように形成され段部１１を、背面水誘導管１０の外周面部に備えている構成が特徴である（請求項１、４の発明）。
前記段部１１の位置から、集水井１の背面土側に向かって突き出る背面水受け入れ管部１２が、言わば上記溝部１５の溝底に相当する肉厚で形成したに等しい小径の管部として設けられている。
また、前記段部１１の位置から集水井１の内部に向かって放水する背面水を、ライナープレート４の内面を濡らす虞のない長さ突き出る背面水放出管部１３を備える構成も変わらない。
本実施例３の背面水誘導管１０は、背面水受け入れ管部１２が上記した如く小径の管部として形成されているので、これを集水井１の集水孔５へ挿し入れて取り付ける作業が比較的に容易である。もっともこの背面水受け入れ管部１２を集水孔５へ挿し入れる際にも、その材質特有の弾力性を利用して適所を部分的に圧縮しつつ集水孔５へ挿し入れることは変わりない。
かくして集水孔５へ差し入れた背面水受け入れ管部１２は、集水孔５の周端５ａの全周に対して、前記圧縮の反力Ｒで密着（圧着）する態様で止水状態に取り付けられる。しかも背面水受け入れ管部１２が集水井１の背面土へ当たって止められるほか、前記段部１１がライナープレート４の内面に突き当たって、背面水放出管部１３がその重量効果などで垂れ下がろうとする作用に抵抗するので、安定した取り付け状態を実現できる。 Next, Embodiment 3 shown in FIG. 8 will be described. The configuration of the back water guide pipe 10 according to the third embodiment is basically the same as that of the first embodiment shown in FIG. 5C.
However, the back surface water guide pipe 10 according to the third embodiment does not have a complete groove portion 15 as in the first embodiment, and has the same configuration as that of one side wall (right side) of the groove portion 15. A feature is that the step portion 11 formed along the peripheral end 5a of the water collecting hole 5 provided in the plate 4 is provided on the outer peripheral surface portion of the back surface water guide pipe 10 (inventions of claims 1 and 4). .
The back water receiving pipe portion 12 protruding from the position of the step portion 11 toward the back soil side of the drainage well 1 is provided as a small diameter pipe portion that is equivalent to a wall thickness equivalent to the groove bottom of the groove portion 15. It has been.
Further, the back water discharge water towards the interior of the collecting well 1 from the position of the stepped portion 11, also do not change configuration having the back water discharge pipe portion 13 projecting fear no length to wet the inner surface of the liner plate 4.
In the back surface water guide tube 10 of the third embodiment, the back surface water receiving tube portion 12 is formed as a small-diameter tube portion as described above, and therefore, the work of inserting the back water receiving tube portion 12 into the water collecting hole 5 of the water collecting well 1 is required. It is relatively easy. However, even when the back water receiving pipe portion 12 is inserted into the water collecting hole 5, the insertion into the water collecting hole 5 is not changed without partially compressing an appropriate place using the elasticity unique to the material.
Thus, the back surface water receiving pipe portion 12 inserted into the water collecting hole 5 is attached in a water-stopping state in such a manner that it adheres (crimps) to the entire circumference of the peripheral end 5a of the water collecting hole 5 by the compression reaction force R. It is done. In addition, the back surface water receiving pipe portion 12 hits the back soil of the catchment well 1 and is stopped, and the step portion 11 hits the inner surface of the liner plate 4 so that the back surface water discharge pipe portion 13 hangs down due to its weight effect. Since it resists the action to be attempted, a stable mounting state can be realized.

次に、図９に示した実施例４を説明する。この実施例４に係る背面水誘導管１０は、上記実施例３の構成を基本として、更に工夫した構成である。
即ち、本実施例４に係る背面水誘導管１０も、上記実施例１の如き溝部１５の構成は有さず、同溝部１５の一方（右側）の側壁と同じく前記ライナープレート４に設けた集水孔５の周端５ａに沿うように形成された段部１１を、背面水誘導管１０の外周面部に備えた構成が上記実施例３と共通する。
そして、前記段部１１の位置からは、集水井１の背面土側に向かって突き出る背面水受け入れ管部１２が、言わば上記溝部１５の溝底に相当する肉厚で形成したに等しい小径の管部として備えている点、及び前記段部１１の位置から集水井１の内部に向かって必要な長さ突き出る背面水放出管部１３を備えている構成までは、上記実施例３と共通する。
本実施例４の背面水誘導管１０の場合は、前記段部１１の位置から、集水井１の背面土側に向かって突き出る小径の背面水受け入れ管部１２の外周面の上面部位に、前記した段部１１と相対峙して集水孔５の孔縁に隣接してライナープレート４へ当たる少なくとも１個の突起部１４を備えている構成を特徴とする（請求項２、５の発明）。 Next, Example 4 shown in FIG. 9 will be described. The back surface water guide tube 10 according to the fourth embodiment is a further devised configuration based on the configuration of the third embodiment.
That is, the back surface water guide pipe 10 according to the fourth embodiment also does not have the configuration of the groove portion 15 as in the first embodiment, and is provided on the liner plate 4 as well as one side wall (right side) of the groove portion 15. The structure which provided the step part 11 formed along the peripheral end 5a of the water hole 5 in the outer peripheral surface part of the back surface water guide pipe 10 is common with the said Example 3. FIG.
And from the position of the said step part 11, the small diameter pipe | tube equivalent to the back surface water receiving pipe part 12 which protrudes toward the back soil side of the catchment well 1 is formed with the thickness equivalent to the groove bottom of the said groove part 15, so to speak. The point provided as a part, and the structure provided with the back surface water discharge pipe part 13 which protrudes from the position of the said step part 11 toward the inside of the catchment well 1 are common to the said Example 3.
In the case of the back surface water guide pipe 10 of the fourth embodiment, the upper surface portion of the outer peripheral surface of the small-diameter back water receiving pipe portion 12 protruding toward the back soil side of the water collecting well 1 from the position of the step portion 11 And at least one protrusion 14 that contacts the liner plate 4 adjacent to the hole edge of the water collecting hole 5 so as to face the stepped portion 11 (inventions of claims 2 and 5). .

上記の通り、背面水受け入れ管部１２が小径管部なので、この背面水誘導管１０も、集水井１を構成するライナープレート４の集水孔５に対しては、要所に圧縮変形を加えつつ挿し入れて取り付ける作業が容易である。しかもその取り付け状態は、集水孔５の周端５ａの全周に対して、前記圧縮の反力Ｒにより密着（圧着）する態様で止水状態に取り付けられることは、上記実施例１〜３と共通する。
集水孔５へ挿し入れた背面水受け入れ管部１２は、前記段部１１と相対峙する配置の突起部１４が段部１１との間に集水孔５の孔縁に当接してライナープレート４へ突き当たる作用を奏するので、背面水放出管部１３がその重量効果などで垂れ下がろうとする力に抵抗して、実施例３よりも一層安定した取り付け状態を実現できる。
したがって、突起部１４は、少なくとも１個設ければ、前記の目的を達成できる。より好ましい実施態様として、突起部１４は、当該背面水誘導管１０の取り付け姿勢において、図９のように上面部位に設けるのが有効的である。そして、背面水受け入れ管部１２の外周面に複数個設けて、前記取り付け状態の一層の安定化を図る構成で実施することも好ましい。突起部１４は、弾力性を有する材質の背面水受け入れ管部１２へ一体的に設けるので、集水孔５の孔縁を潜らせて取り付ける作業にはさして困難性をもたらさない。 As described above, since the back surface water receiving tube portion 12 is a small diameter tube portion, the back surface water guide tube 10 is also subjected to compressive deformation on the water collecting holes 5 of the liner plate 4 that constitutes the water collecting well 1. It is easy to insert and attach it. Moreover, the mounting state is that the water is attached to the entire circumference of the peripheral end 5a of the water collecting hole 5 in a state of being in close contact (crimping) by the reaction force R of the compression. And in common.
The back surface water receiving pipe portion 12 inserted into the water collecting hole 5 is in contact with the edge of the water collecting hole 5 between the protruding portion 14 arranged so as to face the step portion 11 and the liner plate. Therefore, the rear water discharge pipe portion 13 resists the force of drooping due to its weight effect, and a more stable mounting state than that of the third embodiment can be realized.
Therefore, if at least one protrusion 14 is provided, the above object can be achieved. As a more preferred embodiment, it is effective to provide the protrusion 14 on the upper surface portion as shown in FIG. 9 in the mounting posture of the back surface water guide tube 10. And it is also preferable to carry out by the structure which provides two or more in the outer peripheral surface of the back surface water acceptance pipe part 12, and aims at the further stabilization of the said attachment state. Since the protrusion 14 is integrally provided on the back surface water receiving tube 12 made of a material having elasticity, it does not cause any difficulty in the operation of attaching the water collecting hole 5 while being hidden.

（その他の実施例）
最後に図１０〜図１２は、上記した各実施例について、背面水誘導管１０の構成を説明する。
先ず図１０Ａ、Ｂに示した実施例は、排水用部材として図７Ａ、Ｂの実施例３と同様な向きの溝部１５を有する背面水誘導管１０を単独で示したもので、言わば溝部１５の特異な三次元形態を具体的に記載している。併せて背面水受け入れ管部１２の先端面は管軸と直角な垂直面に形成され、上面部に切り欠き状スリット１６が形成された構成を明解に示している。
図１１Ａ、Ｂに示した実施例は、排水用部材として、やはり図７Ａ、Ｂに実施例３と同様な形態の溝部を有する背面水誘導管１０を単独で示したものである。特に、背面水受け入れ管部１２の先端面は、管軸に対して上方側が短い受け口１９を有する傾斜面に形成され、図１０Ａの切り欠き状スリット１６を無用とした構成の例を示している。
更に図１２Ａ、Ｂに示した実施例も、排水用部材として図７Ａ、Ｂの実施例３と同様な向きの溝部１５を有する背面水誘導管１０を単独で示したもので、言わば背面水受け入れ管部１２の先端面は管軸と直角な垂直面に形成されているが、図１０Ａの切り欠き状スリット１６を持たない構成の例を示している。 (Other examples)
Finally, FIGS. 10 to 12 illustrate the configuration of the back water guide tube 10 for each of the above-described embodiments.
First, the embodiment shown in FIGS. 10A and 10B shows the rear water guide pipe 10 having the groove portion 15 in the same direction as the embodiment 3 of FIGS. 7A and 7B as a drainage member. Specific three-dimensional forms are specifically described. In addition, the configuration in which the front end surface of the back water receiving tube portion 12 is formed in a vertical surface perpendicular to the tube axis and the notched slit 16 is formed in the upper surface portion is clearly shown.
The embodiment shown in FIGS. 11A and 11B shows the rear water guide pipe 10 having a groove having the same form as that of the embodiment 3 in FIGS. 7A and 7B as a member for drainage. In particular, the front end surface of the back surface water receiving pipe portion 12 is formed as an inclined surface having a receiving port 19 whose upper side is short with respect to the pipe axis, and shows an example of a configuration in which the notched slit 16 of FIG. .
Further, the embodiment shown in FIGS. 12A and 12B also shows the rear surface water guide pipe 10 having a groove portion 15 in the same direction as that of the third embodiment of FIGS. 7A and B as a drainage member. Although the distal end surface of the tube portion 12 is formed on a vertical surface perpendicular to the tube axis, an example of a configuration without the notch-shaped slit 16 of FIG. 10A is shown.

以上に本発明を図示した各実施例に基づいて説明したが、もとより本発明は実施例の構成、作用に限定されるものではない。当業者が必要に応じて行う設計変更に類する変更、応用の範囲までを含む技術的思想であることを念のため申し添える。 Although the present invention has been described above based on the illustrated embodiments, the present invention is not limited to the configuration and operation of the embodiments. I would like to remind you that this is a technical idea that includes the scope of application and changes similar to design changes made by those skilled in the art.

４ライナープレート
１集水井
４ａ、４ｂ波部
５集水孔
５ａ集水孔の周端
１０背面水誘導管
１１段部
１２背面水受け入れ管部
１３背面水放出管部
１４突起部
１５溝部
１９受け口
１６受水用切り欠き部
１７継手管
１８管体 4 Liner plate 1 Water collection well 4a, 4b Wave part 5 Water collection hole 5a Circumferential end 10 of water collection hole Back water guide pipe 11 Step part 12 Back water receiving pipe part 13 Back water discharge pipe part 14 Projection part 15 Groove part 19 Receptacle 16 Notch portion 17 for water receiving pipe 18 joint pipe

Claims

Back water that has elasticity to the water collecting holes provided in a circular shape when viewed in the horizontal direction from the center of the collecting well at the corrugated portion of the liner plate collecting well constructed by assembling the liner plate into a cylindrical shape A guide pipe is inserted, and the back water guide pipe is elastically deformed and closely attached to the entire circumference of the peripheral edge of the water collecting hole, and is attached to a water stop state.
The back water guide pipe is provided with a step formed along the peripheral end of the water collecting hole on the inner side of the water collecting well than the liner plate on the outer peripheral surface,
From the position of the stepped portion, it has a small-diameter back water receiving pipe portion protruding toward the back soil side of the catchment well,
The rear water discharge pipe portion protruding from the stepped portion toward the inside of the catchment well protrudes into the catchment well rather than the wave portion of the liner plate, and there is a possibility that the drained water will wet the inner surface of the liner plate. The drainage structure of the back water of the liner plate drainage well, characterized by a configuration with no length.

Back water that has elasticity to the water collecting holes provided in a circular shape when viewed in the horizontal direction from the center of the collecting well at the corrugated portion of the liner plate collecting well constructed by assembling the liner plate into a cylindrical shape A guide pipe is inserted, and the back water guide pipe is elastically deformed and closely attached to the entire circumference of the peripheral edge of the water collecting hole, and is attached to a water stop state.
The back water guide pipe is provided with a step portion formed along the peripheral end of the water collecting hole on the inner side of the water collecting well than the liner plate on the outer peripheral surface portion,
A small-diameter back surface water receiving pipe portion projecting from the position of the step portion toward the back soil side of the water collection well is provided, and the water collection is carried out against the step portion on the outer peripheral surface of the back surface water receiving pipe portion. Comprising at least one protrusion adjacent to the hole edge of the hole;
The rear water discharge pipe portion protruding from the stepped portion toward the inside of the catchment well protrudes into the catchment well rather than the wave portion of the liner plate, and there is a possibility that the drained water will wet the inner surface of the liner plate. The drainage structure of the back water of the liner plate water collection well, characterized by a configuration with no length.

Back water that has elasticity to the water collecting holes provided in a circular shape when viewed in the horizontal direction from the center of the collecting well at the corrugated portion of the liner plate collecting well constructed by assembling the liner plate into a cylindrical shape A guide pipe is inserted, and the back water guide pipe is elastically deformed and closely attached to the entire circumference of the peripheral edge of the water collecting hole, and is attached to a water stop state.
The back water guide pipe includes a groove portion formed on the outer peripheral surface portion along the peripheral end of the water collecting hole of the liner plate and into which the peripheral end of the water collecting hole is fitted,
A rear water receiving pipe portion 12 that protrudes from the position of the groove portion 15 toward the back soil side of the drainage well 1;
The back surface water discharge pipe portion protruding toward the inside of the water collection well from the position of the groove portion protrudes into the water collection well rather than the wave portion of the liner plate, and there is no possibility that the back surface water discharged will wet the inner surface of the liner plate. The drainage structure of the back water of the liner plate drainage well, characterized by its length configuration.

It is a member used for the drainage structure of the back water of the liner plate catchment well according to claim 1, and is circular when viewed in the horizontal direction from the center of the catchment well at the wave portion of the liner plate constituting the liner plate catchment well. A back water guide pipe having elasticity, attached in a water-stopping state in a mode of being elastically deformed and closely attached to the entire circumference of the provided water collecting hole,
The outer peripheral surface portion includes a stepped portion formed along the peripheral end of the water collecting hole to the inner surface of the liner plate,
From the position of the stepped portion, it has a small-diameter back water receiving pipe portion protruding toward the back soil side of the catchment well,
The rear water discharge pipe portion protruding from the stepped portion toward the inside of the catchment well protrudes into the catchment well rather than the wave portion of the liner plate, and there is a possibility that the drained water will wet the inner surface of the liner plate. A member for drainage characterized by a structure provided with no length.

It is a member used for the drainage structure of the back water of the liner plate catchment well according to claim 2, and is provided in the wave part of the liner plate of the liner plate catchment well in a circular shape when viewed in the horizontal direction from the center of the catchment well. An elastic back water guide pipe attached to a water-stopping state in a mode of being elastically deformed and closely attached to the entire circumference of the collected water collecting hole,
The outer peripheral surface portion is provided with a step portion formed so as to be along the peripheral edge of the water collecting hole on the inner surface side of the liner plate.
A small-diameter back surface water receiving pipe portion projecting from the position of the step portion toward the back soil side of the water collection well is provided, and the water collection is carried out against the step portion on the outer peripheral surface of the back surface water receiving pipe portion. Comprising at least one protrusion adjacent to the hole edge of the hole;
The rear water discharge pipe portion protruding from the stepped portion toward the inside of the catchment well protrudes into the catchment well rather than the wave portion of the liner plate, and there is a possibility that the drained water will wet the inner surface of the liner plate. A member for drainage, characterized in that it has a structure with no length.

It is a member used for the drainage structure of the back water of the liner plate catchment well according to claim 3, and is circular in a wave portion of the liner plate constituting the liner plate catchment well as viewed in the horizontal direction from the center of the catchment well. A back water guide pipe having elasticity, attached in a water-stopping state in a mode of being elastically deformed and closely attached to the entire circumference of the provided water collecting hole,
The outer peripheral surface portion is provided with a groove portion formed along the peripheral edge of the water collecting hole of the liner plate,
A rear water receiving pipe portion protruding from the position of the groove portion toward the rear soil side of the catchment well,
The back surface water discharge pipe portion protruding toward the inside of the water collection well from the position of the groove portion protrudes into the water collection well rather than the wave portion of the liner plate, and there is no possibility that the back surface water discharged will wet the inner surface of the liner plate. A member for drainage, characterized in that it is provided with a length.

The tip surface of the back water receiving pipe part protruding from the position of the water collecting hole toward the back soil side of the water collecting well is formed at right angles to the pipe axis, or the upper side of the pipe axis is formed on the inclined surface of the short receiving port. The drainage member according to any one of claims 4 to 6, wherein the drainage member is provided.

When the tip surface of the back water receiving pipe protruding from the water collecting hole position toward the back soil side of the water collecting well is formed at right angles to the pipe axis, water is received from the top face to the pipe axis in the top surface. The drainage member according to claim 7, wherein a cutout portion is formed.

The back surface water discharge pipe part protruding toward the inside of the catchment well from the position of the stepped part or the groove part is a different plate connected to the back surface water guide pipe through the joint pipe, and the back surface water discharged is the liner plate. The drainage member according to any one of claims 4 to 6, wherein the drainage member is formed with a length that does not cause the inner surface of the drainage to wet.