JP3924492B2

JP3924492B2 - Waterway construction method and waterway components in pipes

Info

Publication number: JP3924492B2
Application number: JP2002112189A
Authority: JP
Inventors: ▲潤▼ 原田; 吉雄阿部
Original assignee: Kubota CI Co Ltd
Current assignee: Kubota CI Co Ltd
Priority date: 2002-01-21
Filing date: 2002-04-15
Publication date: 2007-06-06
Anticipated expiration: 2022-04-15
Also published as: JP2002227283A

Description

【０００１】
【発明の属する技術分野】
本発明は、新設の下水管や老朽化した既設の下水管等の管路内における水路の構成工法に係り、特に、少流量時の汚水等の円滑な流下を確保するため、又は老朽化により所定の勾配がとれず、場合によっては逆勾配となった管路内に、所定の勾配を有する新規の水路を低コストで効率よく形成することができる水路構成工法に関する。さらに、管径が小さく人が入ることができない管路に新設水路を効率よく構成することができる水路構成部材と、これを用いる水路構成工法に関する。
【０００２】
【従来の技術】
従来、この種の水路構成工法としては、特許第２７０４９７６号公報に記載された水路構成工法がある。この工法は、管路内底面に管路方向に下地コンクリートを打設する工程、樋状体の軸に沿った開口端面及び軸方向端面にそれぞれ半径方向へ延出する突縁が一体的に形成され、軸方向端面の突縁には締結部材用挿通孔が設けられ、樋状体の両側部にアンカー部材取付部を設けた水路構成部材を下地コンクリート上に配列して相互を締結部材を介して連結する工程、水路構成部材のアンカー部材取付部にアンカー部材を取付けて管路に固定する工程、水路構成部材と管路内面との間にセメントモルタルを打設する工程とからなるものである。
【０００３】
また、前記の工法における下地コンクリートの打設を省略し、管路内に水路構成部材を配列し相互に連結し、水路構成部材と管路内面との間にスペーサを挿入して水路構成部材の勾配及び姿勢を調整し、管路内に水路構成部材を固定するものである。そして、管路内への設置及び接続が容易な樋状の水路構成部材を提供し、施工も容易に行えモルタル打設後も界面剥離の生じることのない水路工法を提供するものである。
【０００４】
【発明が解決しようとする課題】
ところで、前記構造の水路構成工法は、管路が既設管路で供用中であって、下水道管に汚水等が流れている場合、この汚水等を堰き止め、新規の水路を構成する区間に沿って水替え用の配管を設置し、汚水等を新たに設置した水替え配管に流してから新規の水路を構成する必要があった。このため、区間ごとに水替え配管を設置する工程が必要となり、工程が増えるため作業が煩雑となり、工期が長くなると共に、コストが上昇するという問題点があった。
【０００５】
また、水路構成部材の多数のアンカー部材取付部に多数のアンカー部材を取付けて管路に水路構成部材を固定し、また所望の勾配にするためスペーサを使用して既成管路と水路構成部材との間隔を設定している。そして、アンカー部材やスペーサは、モルタル打設後は全てモルタル内に埋もれてしまうため、これらの部材を再度使用することができず、水路構成のたびに多数の部材が必要となっていた。さらに、下地コンクリートを打設するための管内の水抜き工程や、下地コンクリートを打設する工程が必要であり、工程が多いため多大な工期を必要としており、水路構成のコストが増大する問題点があった。
【０００６】
そして、前記構造の水路構成工法は、水路構成部材のアンカー部材取付部にアンカー部材を取付けて管路に固定するため、管路内に人が入って作業することが必要であった。このため、人が入れない管径の小さい管路では新規の水路構成ができないという問題点があった。
【０００７】
本発明は、このような問題に鑑みてなされたものであって、その目的とするところは、水替え配管を設置する工程が不要であり、勾配を付けた水路構成部材を利用することにより、供用中の下水道管に流れる汚水等の水替えが別途に水替え配管等を設置することなく行えるため、コストを大幅に削減できると共に、工程を大幅に短縮できる水路構成工法を提供するものである。
【０００８】
また、下地コンクリートを打設する工程が不要であり、工期を短縮することができ、水路構成部材の支持が容易に行えると共に、支持部材を何度でも使用することができるため、水路構成費用を低減できる管路内における水路構成工法を提供することにある。さらに、水路の勾配を支持部材により精度よく調整でき、新規の水路を汚水等が安定して流れる管路内における水路構成工法を提供することにある。そして、人が入れないような管径の小さい管路でも任意の勾配を付けて水路構成が行え、管路内の底面に新規の水路を構成することができ、しかも工程が簡単で水路形成が容易に行える水路構成部材と、この水路構成部材を用いた水路構成工法を提供することにある。
【０００９】
【課題を解決するための手段】
前記目的を達成すべく、本発明に係る管路内における水路構成工法は、地中に埋設された管路内に新規の水路を構成する工法であって、管路内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材を連結する工程と、連結された水路構成部材に所望の勾配を付ける工程と、勾配を付けた既に補修の済んだ上流側の水路に間隔を開けて新規の水路を構成し、該間隔に水路構成部材を挿入して上流側の水路と新規の水路とを連結し、該上流側の水路と新規の水路からなる水路を介して汚水を流す水替えの工程と、水路構成部材を管路に固定する工程とを備える。
【００１０】
水路構成部材は半割管や、インバート部の上部を補強したもの、インバート部の上端に傾斜部を有するもの、傾斜部の端部に補助傾斜部を連続したもの等、適宜のものを使用できる。これらの水路構成部材を管路に挿入する場合、管路内壁面に固定された支持部材でレール状の支持体を支持し、この支持体に沿わせて挿入することができ、また管路に沿ってガイドワイヤを張設し、このガイドワイヤに沿わせて挿入してもよい。
【００１１】
この構成によれば、インバート部を形成した水路構成部材を連結して管路内に挿入して勾配を付け、連結して勾配が付けられた水路構成部材を管路に固定するため、工程を大幅に簡略化でき、工事期間の大幅な短縮と、コストの大幅な低減が可能となる。また、勾配の付けられた水路構成部材に供用中の汚水等を流す工程を備えているため、別個の水替え用の配管を必要とせず、施工作業を容易にすることができる。
【００１２】
また、本発明に係る他の水路構成工法は、地中に埋設された管路内に新規の水路を構成する工法であって、管路内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部と該インバート部外方に延出する支持フランジ部とを形成した水路構成部材を前記支持部材により前記支持フランジ部で宙吊りに支持する工程と、支持部材により支持された水路構成部材の鉛直方向の位置を調整して水路構成部材に勾配を付ける工程と、水路構成部材を勾配を付けた状態で管路内に固定する工程と、支持部材を取外す工程とを備えることを特徴とする。水路構成部材は、断面が半円形のもの、角樋状のもの、略Ｕ字状のもの、略Ｖ字状のもの等、上方に開口する適宜の樋状のものを採用できる。
【００１３】
この構成によれば、宙吊りにされた水路構成部材に、支持部材を調整して勾配を付け、このあと勾配を付けた状態でコンクリート又はモルタル等で固定し、水路構成部材を支持していた支持部材を取り外すため、工程を簡略化することができ、支持部材は再度使用することができる。このため、水路構成のコストを大幅に低減することができる。
【００１４】
新規の水路を構成する管路が既設管路である場合、水路構成部材を勾配を付けた状態で管路に固定する工程の前工程として、水路構成部材に汚水等を流す水替えの工程を備えることが好ましい。この構成によれば、勾配を付けて宙吊りにした水路に供用中の汚水等を流すことができるため、多大な費用が発生する水替え作業が容易に行え、水替え用の別途の配管等は不要となる。
【００１５】
また、本発明に係る管路内における水路構成工法の好ましい具体的な態様としては、支持部材は、管路に略水平状態に固定される水平部材と、水平部材より垂下される垂直部材とを備え管路の長手方向に沿って所定間隔で設置され、垂直部材は可動部を設けた吊下げ軸で構成され、この吊下げ軸を移動させて水路構成部材の鉛直方向の位置を調整することを特徴としている。可動部としては外周にねじ部を形成した吊下げ軸が好適である。この構成によれば、水路構成部材を支持する支持部材を水平部材と垂直部材で構成し、外周にねじ部等の可動部を設けた垂直部材で水路構成部材の鉛直方向の位置を調整できるため、水路の勾配を連続的に精度よく設定することができる。
【００１６】
さらに、本発明に係る管路内における水路構成工法の好ましい具体的な他の態様としては、水路構成部材は、支持部材により管路に沿って宙吊りに支持された支持体に固定されて支持されることを特徴としており、支持体としては管路方向に連続した部材が好ましい。この構成によれば、支持部材により予め管路に沿って宙吊りに支持された、例えば２本のレール状の支持体に水路構成部材は固定されるため、水路構成部材の支持が容易に行え、勾配も連続的に精度よく設定できる。また、この支持体を利用して、管路への水路構成部材の搬入を容易に行うことができる。
【００１７】
本発明に係る管路内における水路構成工法の他の態様としては、地中に埋設された管路内に新規の水路を構成する工法であって、管路内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材を支持部材により支持された状態で連結する工程と、連結された水路構成部材に所望の勾配を付ける工程と、水路構成部材を勾配を付けた状態で管路に固定する工程とを備え、水路構成部材は、管路と水路構成部材との間に水路構成部材の移動を阻止できる程度の高さまでコンクリート又はモルタルを注入して仮固定され、支持部材を取り外したあと、水路構成部材の上部までコンクリート又はモルタルを注入して本固定されることを特徴としている。水路構成部材の移動を阻止できる程度の高さとは、支持部材を外したとき、水路構成部材が移動せず所望の勾配が保てる水路構成部材の全高の半分程度の高さで仮固定される高さであり、次にコンクリート又はモルタルを注入するとき、水路構成部材が移動しない状態とする。これにより、支持部材を外した水路構成部材の上端部までコンクリート等を傾斜状態に打設でき、水路構成部材の周囲部分から中心のインバート部の水路に水を安定して誘導できる。
【００１８】
本発明に係る水路構成部材は、地中に埋設された管路内に新規の水路を構成するものであって、汚水等が流れる水路を構成するインバート部の長手方向の両端部に外側に向けて直角に延出する接合フランジ部を有し、前記インバート部の上方の開口端部より僅かに下方に、外側に向けて延出する支持フランジ部が開口端部に沿って連続的に、接合フランジ部に達するように形成され、開口端部及び支持フランジ部を補強することを特徴とする。補強としては、開口端部と支持フランジ部を連結する断面が略Ｌ字状の金属製のアングル材を補強材として内蔵することが好ましい。
【００１９】
この構成によれば、開口端部及び支持フランジ部を補強されているため、例えば人が踏みつけた場合でも水路構成部材は破損することが少なく、コンクリート等で固定したあと、水路構成部材とコンクリート等との隙間に汚水が浸入して水路構成部材に浮力が作用しても変形することがない。また、開口端部の上端から僅かに下方に支持フランジ部が延出し、上端と支持フランジ部と間に所定の距離が取れるため、この距離に相当するコンクリート等の厚さを確保でき、ひび割れを防止することができる。この水路構成部材は、前記した水路構成工法に限らず、従来からの水路構成する工法にも適用できるものである。
【００２０】
本発明に係る管路内における水路構成工法の他の態様は、地中に埋設された管路内に新規の水路を構成する工法であって、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材に、垂直高さを調整したスペーサを固定して連結する工程と、連結された水路構成部材を管路の底面に対接させて固定する工程とを備えることを特徴とする。前記水路構成部材にスペーサを固定して連結する工程は、管路内にガイドワイヤ等のガイド手段を通して張設し、このガイド手段に水路構成部材を宙吊りにして行い、そのあと水路構成部材を管路に固定することが好ましい。管路は少なくとも２つのマンホール間を互いに連通するものが好ましく、マンホールから多数の水路構成部材を搬入して管路内に挿入して連結し、水路を構成する。
【００２１】
このように構成された本発明の管路内における水路構成工法は、管路内において水路構成部材にスペーサを固定して連結し、スペーサの垂直高さを調整して所望の勾配を付けるため、管路内に水路構成部材を連結して容易に勾配をつけて固定することができる。また、前記の水路構成部材にスペーサを固定して連結する工程において、管路内にガイドワイヤ等のガイド手段を通して張設し、ガイドワイヤに沿わせて水路構成部材を宙吊りにして順次連結し、水路構成部材を管路に固定してガイドワイヤを取外すと、人が入れないような小さい管径の管路であっても、新規の水路を構成することができる。しかも、工程が簡略であるため、短い工期で、低コストで施工することができる。なお、この水路構成工法は、人が入れるような管径の大きい管路にも適用できることは勿論である。
【００２２】
前記の水路構成工法の他の態様としては、地中に埋設された管路内に新規の水路を構成する工法であって、マンホール内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材と、垂直高さを調整できるスペーサとを搬入する工程と、マンホール内で前記スペーサを固定した前記水路構成部材を相互に連結し、前記スペーサで垂直高さを調整しながら順次前記管路内に挿入する工程と、スペーサを管路の底面に対接させて水路構成部材を管路に固定する工程とを備えることを特徴としている。
さらに他の態様としては、地中に埋設された管路内に新規の水路を構成する工法であって、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材に、垂直高さを調整したスペーサを固定して連結する工程と、連結された前記スペーサを前記管路の底面に対接させて前記水路構成部材を前記管路に固定する工程とを備え、前記水路構成部材にスペーサを固定して連結する工程は、前記管路内にガイド手段を通して張設し、該ガイド手段に前記水路構成部材を宙吊りにして行い、そのあと前記水路構成部材を前記管路に固定することを特徴とする。
さらに他の態様としては、地中に埋設された管路内に新規の水路を構成する工法であって、上流側マンホールと下流側マンホールとの間に、その端部が上流側マンホール及び下流側マンホールとで支持されたガイド手段を張設し、一方のマンホール内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部を形成した水路構成部材を順次搬入し、前記水路構成部材を前記ガイド手段に沿わせて該水路構成部材を宙吊り状態で順次連結しながら前記管路内に挿入し、前記水路構成部材を前記管路に固定してから前記ガイド手段を取り外すことを特徴としている。
【００２３】
水路構成部材の接合フランジ部にスペーサを挟んで固定し、スペーサの垂直高さを例えば徐々に短くなるように調整して管路底面に対接させると、水路構成部材に所望の勾配を付けることができる。水路構成部材の連結手段を少量のコンクリートで先ず固定し、次いで水路構成部材と管路との間にコンクリートを充填して固定すると、水路構成部材が移動することなく所定の位置に固定することができる。管路が既設で供用中の場合、勾配が付いて連結された水路構成部材に水替えできるため、水替え用の別個の管路が不要となり、コストを低減できる。
【００２４】
本発明に係る他の水路構成部材は、地中に埋設された管路内に新規の水路を構成する水路構成部材であって、上方に開口し長手方向に沿って汚水等が流れる樋状のインバート部を形成し、インバート部の長手方向の両端部に外側に向けて直角に延出する接合フランジ部を有し、インバート部の上端から外側に向けて上昇して連続する傾斜部を形成し、傾斜部の下面または接合フランジ部に水路構成部材を支持するガイド手段のためのガイド部を形成することを特徴とする。これにより、水路構成部材は軽量でねじれにくい形状とすることができる。インバート部は断面が半円形状のもの、角樋状のもの、略Ｕ字状のもの、略Ｖ字状のもの等、適宜の形状のものを採用できる。また、ガイド部は、例えばガイドワイヤ等のガイド手段が挿入されるガイド孔や、ガイド溝、スリット等で構成されることが好適である。
【００２５】
また、本発明に係る他の水路構成部材の好ましい具体的な態様としては、前記傾斜部の端部に連続する可撓性を有する補助傾斜板部を、さらに備えることを特徴としている。補助傾斜板部は、可撓性を有し自由に湾曲できるゴム板状のもの、あるいは任意に切断できる薄板状のものであり、傾斜部に接着等で連結されたり、傾斜部の端部に形成した溝部に嵌合して連結されたり、ビス等で固定されて連結されることが好ましい。
【００２６】
さらに、水路構成部材は傾斜部の下面に長手方向に沿ってガイド部を形成しているので、ねじれにくい形状となっており、管路内での施工が容易となる。また、ガイド部を形成することにより、剛性を高くすることができると共に見かけの比重を小さくでき、搬送や管路内への搬入が容易となり、軽量のため供用中の管路では汚水等に浮かせて管路内に挿入することができる。ガイド部を断面積の大きいガイド孔とし、水路構成部材を管路内に固定後、ガイド孔の上面を除去すると、水路の断面積を大きくできるため、管路内の断面欠損を最小とすることができる。
【００２７】
【発明の実施の形態】
以下、本発明に係る管路内における水路構成工法の一実施形態を図面に基づき詳細に説明する。先ず、管路内に新規の水路を構成するための水路構成部材について説明する。図１は、本実施形態に係る水路構成部材を示し、（ａ）は平面図、（ｂ）は一部を破断した正面図、（ｃ）は一部を破断した側面図、図２（ａ）は図１の要部拡大断面図、図２（ｂ），（ｃ）はそれぞれ補強材の他の例の断面図である。図１，２において、水路構成部材１は、基本的には円筒を軸方向に沿って半割にしたような形状をしており、例えば断面半円形のインバート部２の直径が５０ｃｍ程度で長さが２ｍ程度の樋形状をしている。水路構成部材１の長手方向の両端部には、外側に向けて直角に延出する接合フランジ部３，３が形成され、所定の間隔で複数の連結孔４が穿設されている。
【００２８】
水路構成部材１は樋形状で上方が開口しているが、図２（ａ）に示すように、上方の開口端部より僅かに下方に、好ましくは３０ｍｍ程度下方に長手方向に沿って水平方向に延出する支持フランジ部５，５が形成され、支持フランジ部５，５には所定の間隔で複数の支持孔６が穿設されると共に切欠き６ａが形成されている。水路構成部材１はガラス繊維等で補強した強化プラスチック（ＦＲＰ）で形成されており、上端部１ａ，１ａと支持フランジ部５，５とを連結するように、断面が略Ｌ字状の金属製のアングル材７が内蔵され開口端部側が補強されている。また、長手方向の途中の２個所には、インバート部２の外周に厚肉の補強部８が形成されている。
【００２９】
なお、水路構成部材は繊維強化プラスチックから形成されるものに限らず、金属板材を板金加工して形成したものや、金属鋳物で形成したもの、通常の合成樹脂から形成したもの等、適宜のものを採用することができる。また、図２（ｂ）に示すように、断面が略Ｔ字状の金属製の押出し材７Ａを内蔵し、垂直の上端部１ａと水平の支持フランジ部５とを連結するように補強してもよい。さらに、図２（ｃ）に示すように、金属メッシュ材７Ｂを上端部１ａと支持フランジ部５とに連続するようにインサートしてもよい。
【００３０】
前記した水路構成部材１を長手方向に所定数だけ連結して水路を構成することができる。すなわち、水路構成部材１，１の接合フランジ部３，３を対接して連結孔４をボルトナットあるいは長ボルトと２つのナット等の締結手段９（図４）で締結することにより長手方向に必要な長さだけ連結して、管路内に水路を構成することができる。このようにして形成した新規の水路は、勾配が変化した管路内に、任意の勾配を設定した水路を形成することができる。
【００３１】
つぎに、前記の水路構成部材１を管路内に宙吊り状態に支持する支持部材１０について、図３〜５を参照して説明する。図３は管路内の低い位置に固定された支持部材を示す断面図、図４は図３の一部を側面図としたＡ−Ａ線断面図、図５は管路内の高い位置に固定された支持部材を示す断面図である。支持部材１０は管路Ｐ内に水平状態に固定される水平部材として、断面が略コ字状のチャンネル材から形成される水平梁材１１と、この水平梁材から垂下される垂直部材として長ボルトから形成される２本の吊下げ軸１５，１５とを備えている。吊下げ軸１５，１５は水平梁材の中心から均等の距離に設けられ、外周には鉛直方向の可動部としてねじ部が形成されている。
【００３２】
水平梁材１１は水平方向の両端部にエンドプレート１１ａが溶接され、このエンドプレートに連結されたねじジャッキ１２により管路Ｐ内に略水平状態に固定される。すなわち、ねじジャッキ１２はベース板１２ａと、ベース板に垂設されたねじ軸１２ｂと、ねじ軸に螺合するクランプ１２ｃとを備え、エンドプレート１１ａの貫通孔にねじジャッキ１２のねじ軸１２ｂが挿入され、クランプ１２ｃがエンドプレート１１ａに当接する構成であり、クランプ１２ｃを回転させてベース板１２ａを管路Ｐの壁面に圧接させることにより、水平梁材１１は水平状態に固定される。なお、ベース板１２ａの四隅には、４本の調整ボルトがねじ込まれ、ベース板が壁面に４点で均等に当たるように構成している。
【００３３】
水平梁材１１と吊下げ軸１５との連結は、水平梁材の上下のフランジ部に設けた貫通孔に吊下げ軸１５を挿入し、ダブルナット１６，１７で固定する構成となっている。実際には、吊下げ軸１５の勾配に対応する上下移動範囲を大きくすると共に、吊下げ軸１５を安定して連結するため、水平梁材１１の上辺又は下辺に短尺の梁材１３を連結し、必要に応じて複数個連結して調整している。すなわち、図３に示すように管路Ｐの勾配の下方に対応する位置に水路構成部材１を固定するときは、水平梁材１１の下部に梁材１３を２個連結して水路構成部材１を下方に設置し、図５に示すように管路Ｐの勾配の上方の位置に対応する位置に水路構成部材１を支持するときは、水平梁材１１の上部に１つの梁材１３を連結して水路構成部材１を上方に設置する。また、図５のように、ねじジャッキのベース板１２ａと壁面との間に、例えば金属板材１４を介在させることにより、水平梁材１１をさらに上方に固定できる。
【００３４】
吊下げ軸１５，１５の下端に直接、水路構成部材１の支持フランジ部５を支持させるようにしてもよいが、本実施形態では吊下げ軸に管路の長手方向に沿う支持体２０を支持し、この支持体に水路構成部材１を固定するようにしている。すなわち、吊下げ軸１５，１５の下端に短尺のチャンネル材で形成した連結片１８を溶接等により固定し、この連結片に断面が略Ｃ字状のチャンネル材から構成した支持体２０をボルト締めし、支持体２０に水路構成部材１を蝶ねじ２１で固定するように構成している。支持体２０は、後述する図７に示すように、２ｍ程度の長さのチャンネル材２２を連結プレート２３で連結して構成される。
【００３５】
前記の如く構成された水路構成部材１、支持部材１０及び支持体２０を用いた本実施形態の管路内における水路構成工法について、図６〜８を参照して以下に説明する。図６は水路構成工法の各工程を示す管路の概略縦断面図、図７は水路構成部材を連結して勾配を付けて支持した状態の一部破断平面図、図８は図７の一部破断側面図である。管路Ｐは、本実施の形態では内径が１６５０の鉄筋コンクリート製のヒューム管が使用され、管路Ｐは汚水と雨水が流れる合流管である。管路Ｐは地中Ｇに埋設されてから長期間が経過して老朽化しており、不等沈下等により所定の勾配が得られていない状態となっており、雨水が流れる場合は汚水も同時に流れるが、汚水のみのときは流れにくく滞留しやすい状態で新規の水路が必要となっている。なお、管路は断面が円環の管路に限られず、断面が馬蹄形や矩形の管路でもよい。
【００３６】
前記した水路構成部材１を管路Ｐ内に設置して新規の水路を形成するときは、先ず１〜２ｍ程度の長さの各部材をマンホールから下水道管に搬入する。そして、図６（ａ）のように管路の軸方向に直角に、管路Ｐの内壁に略水平方向に突っ張って支持部材１０を支持固定させる。支持部材１０は管路Ｐに沿って例えば３ｍ間隔で設置する。すなわち、水平梁材１１を管路の上下中央部で略水平状態に位置させ、両端のねじジャッキ１２のクランプ１２ｃを調整してねじ軸１２ｂを延出し、ベース板１２ａを管路Ｐの壁面に圧接させる。壁面の凹凸が激しく、円柱面の状態が悪い場合は、ベース板１２ａの四隅の調整ボルトを出入させて壁面の凹凸に合わせることができる。このように、管路Ｐの壁面に孔を開けることなく水平梁材１１を壁面に固定することができ、管路Ｐを傷めることがない。
【００３７】
このように管路Ｐの壁面に固定された水平梁材１１に、図６（ｂ）のように吊下げ軸１５，１５をダブルナット１６，１７で連結する。管路内の高い位置に固定される水平梁材１１は、上部に短尺の梁材１３が位置するように、また勾配の下の位置に固定される水平梁材１１は短尺の梁材１３が下にくるように梁材１３をボルト締めする。なお、図６（ａ）に２点鎖線で示すように、水平梁材をねじジャッキ１２のねじ軸１２ｂを中心として回転させ、梁材１３を上下のどちらかに向けて固定してもよい。そして、水平梁材１１及び梁材１３のフランジ部分の貫通孔に吊下げ軸１５を貫通させ、上下端のフランジ部をダブルナット１６，１７で締めることにより吊下げ軸１５，１５を固定する。
【００３８】
吊下げ軸１５，１５と水路構成部材１との固定は、図６（ｃ）のように、長手方向に連結した支持体２０を介して行う。支持体２０はマンホールに挿入しやすい長さである２ｍ程度の長さの断面が略コ字状のチャンネル材２２を、複数個連結プレート２３を介してボルトナットで連結し、例えばマンホール間の距離に合わせている。支持体２０は水路構成部材１の開口端部に合わせて２本を平行に設置し、２本のレール状とする。そして、２本の支持体２０は、相互に一定の間隔を有するように幅止め用のアングル２４（図３参照）で連結されている。水路構成部材１は、支持フランジ部５がこれらの支持体２０に蝶ねじ２１（図３参照）で固定されて宙吊りに支持され、順次接合フランジ部３，３の連結孔４を締結手段９でボルト締めして連結する。管路Ｐが既設で汚水等が流下中であっても、水路構成部材１を宙吊りに支持することができる。このように、この工程では、管路Ｐ内に、上方に開口し長手方向に沿って汚水等が流れうる樋状のインバート部２を形成した水路構成部材１を連結している。
【００３９】
つぎに、このように宙吊りに支持された水路構成部材１に勾配を付ける工程に移る。この工程では、支持部材１０の垂直部材である吊下げ軸１５と水平梁材１１との固定位置を変えることにより吊下げ軸１５の鉛直方向の位置を調整する。この調整は吊下げ軸１５に螺合するダブルナット１６，１７を調整して行う。水平梁材１１と短尺の梁材１３とにより鉛直方向に離れた状態の２つのダブルナット１６，１７で吊下げ軸１５の調整を行うため調整が連続的に精度よく行え、固定後は調整状態が安定し水平梁材１１の長手方向に沿って吊下げ軸１５が移動するような横ぶれを防止することができる。
【００４０】
前記のように、管路Ｐ内に水路構成部材１を連結して所定の勾配を付けたあと、水替え（図示せず）を行う。水替えは、今まで流れていた汚水等を堰き止め、水路構成部材１で構成された新規の水路に流れを変えて、管路Ｐの底面の汚水を除去する。なお、水替えを行うときに、既に補修の済んだ上流側の水路構成部材を僅かに短尺のもの、例えば１．８５ｍ程度としておき、隣接する水路との間に１５ｃｍ程度の間隔を開けておき、この間隔部分に１５ｃｍ程度の短い別の水路構成部材を挿入して、既存の水路と新規の水路とを連結して水替えを行うようにすると、水替え作業が効率よく行える。また、水替えは水路構成部材１に勾配をつける前に行い、水替え後に勾配をつけるように工程を変更してもよい。そして、既設の管路の場合は水替えの工程が必要であるが、新規の管路や供用中でない管路の場合は、この水替えの工程は不要となる。
【００４１】
このようにして水替えが済んだあと、管路Ｐの所定の位置に水路構成部材をセットし直し、水路構成部材１の勾配を付けた状態を維持して、図６（ｄ）のように水路構成部材１をコンクリートＣ１で固定する。管路Ｐの底面に沿ってコンクリートを搬送チューブで圧送し、水路構成部材１と管路Ｐの底面との間をコンクリートＣ１で充填する。この充填高さは、水路構成部材１の垂直高さの半分程度の高さ、又は多少高低した高さで設定するが、少なくとも接合フランジ部３を連結する下方のボルト等の締結手段９が埋まる高さでなくてはならず、この状態で水路構成部材１を仮固定する。図示の例では、下方の４つのボルトがコンクリートＣ１で埋設され、水路構成部材１は移動することが阻止される。
【００４２】
このようにして、水路構成部材１を仮固定したあと、図６（ｅ）のように水路構成部材１を支持していた各種の部材を取り外す。すなわち、水路構成部材１と支持体２０とを固定している蝶ねじ２１を外すことにより、両者を容易に分離することができる。支持体２０との固定を解除しても、連結された水路構成部材１はコンクリートＣ１で管路Ｐに仮固定されているため、移動することはない。そして、支持体２０の連結プレート２３を外して元の２ｍ程度の長さのチャンネル材２２に分割する。さらに、水平梁材１１の両端のねじジャッキ１２を緩め支持部材１０を管路Ｐの壁面から取り外す。水平梁材１１と吊下げ軸１５とから構成される支持部材１０及び支持体２０は、分割して次の工程へ移動され、再度使用することができる。
【００４３】
このあと、すなわち、支持部材１０を取り外したあと、図６（ｆ）のように仮固定された水路構成部材１の上部までコンクリートＣ２を注入して固定する。前記の仮固定では、水路構成部材１は途中までコンクリートＣ１で固定されており、この上にさらに水路構成部材１の上端までコンクリートＣ２を注入し、コンクリートＣ２の上端面を中央のインバート部２に向かう傾斜面Ｃａとする。水路構成部材１の開口の上端部１ａはアングル材７で補強され、水平状の支持フランジ部５から上方に突条が突出しており、この突条の上端までコンクリートＣ２の傾斜面Ｃａが形成される。
【００４４】
コンクリートＣ２は水平状の支持フランジ部５を囲んで固着され、上端部１ａと支持フランジ部５は補強されているため、コンクリートＣ２と水路構成部材１との間の剥離が起こりにくく、傾斜面Ｃａからインバート部２で形成された水路への汚水等の誘導が安定して行える。また、コンクリートＣ２と水路構成部材１の上部は、支持フランジ部５より上の厚さで接合するため、コンクリートＣ２にひび割れが発生することを防止できる。さらに、コンクリートＣ１，Ｃ２と水路構成部材１とは、長ボルトと２つのナット等の締結手段９で結合されるため結合強度が大きく、両者の剥離や分離を防止することができる。
【００４５】
前記したように、老朽化して勾配が一定でない管路Ｐ内に、水路構成部材１を連結して任意の勾配の新規の水路をインバート部２により構成したので、汚水等は新規の水路内を安定して流れるため、汚水が滞留することがなくなり、臭気等が発生することを回避できる。特に、汚水と雨水が流れる合流管の場合、晴天で流量が少ない時でも汚水を円滑に流下させることができる。合流管の場合、晴天が続くと流量が少なくなり、汚水中の汚濁物質が堆積して臭気の発生原因となり、堆積した汚濁物質が雨天時に流出して公共水域を汚染するが、このような不具合を防止することができる。
【００４６】
また、周辺に雨が降り、雨水が管路内に流入すると、雨量が少ない場合はインバート部２の水路を流れるが、雨量が多くなるとインバート部２を流れると共に、その両側の傾斜面Ｃａを流れる。雨量が少なくなると、傾斜面Ｃａに沿って流れる汚水等はインバート部２に円滑に流れ、滞留することがないため管路から臭気が発生することはない。
【００４７】
前記の工程において、図６（ｃ）に示す水路構成部材１を支持体２０に固定する工程は、図９に示すようにしてもよい。図９において、水路構成部材１の両端部の上部に吊下げ部材２５を４個、蝶ねじ２１で別途固定する。吊下げ部材２５は断面が略コ字状のチャンネル材を１０ｃｍ程度の長さに切断し、下方のコーナー部を面取りして水路構成部材１の上端部１ａと支持フランジ部５のコーナーに対接するように構成している。
【００４８】
この吊下げ部材２５を用いることで、支持体２０の下方のフランジに吊下げ部材２５の上方のフランジを引掛けることができ、この状態で水路構成部材１を支持体２０に沿ってスライドさせて管路Ｐ内に搬入させることができる。このようにして、管路Ｐへの水路構成部材１の搬入はマンホールから容易に行うことができる。なお、吊下げ部材にコロ状の回転体を取付けて、搬入を軽い押圧力で行うようにしてもよい。また、管路Ｐに汚水Ｄ等が流れている状態でも、水路構成部材１の搬入は容易に行える。
【００４９】
管路Ｐが図１０の平面図に示すように湾曲している場合は、水路構成部材１を連結するときに、中間に図１１に示す曲がりコマ３０を挿入して湾曲状態に合わせるようにする。曲がりコマ３０は水路構成部材１と同一の断面形状をしており、水路構成部材１と連結する左右の接合フランジ部３１，３１が傾斜状態に連続しており、接合フランジ部間の距離が左右の壁面で異なっている。接合フランジ部３１には所定の間隔で複数の連結孔３２が穿設されている。この曲がりコマ３０を中間に挟んで水路構成部材１を連結することにより、湾曲した管路Ｐに合わせて新規の水路を構成することができる。
【００５０】
つぎに、本発明に係る他の水路構成部材、及びこの水路構成部材を用いる水路構成工法の他の実施形態を図面に基づき詳細に説明する。先ず、管路内に新規の水路を構成するための水路構成部材について説明する。図１２は、本実施形態に係る水路構成部材を示し、（ａ）は一部を破断した平面図、（ｂ）は（ａ）の一部を破断した正面図、図１３（ａ）は図１２の水路構成部材の側面図、（ｂ）は図１２のＡ−Ａ線断面図である。
【００５１】
図１２，１３において、水路構成部材４１は、円筒を軸方向に沿って半割にしたような形状の断面半円形のインバート部４２と、このインバート部の上端から外側に向けて上昇して連続する傾斜部４３，４３と、インバート部４２の長手方向の両端部に外側に向けて、また傾斜部の長手方向の両端部に下側に向けて、直角方向に延出する接合フランジ部４４，４４とを備えている。インバート部４２は直径が５０ｃｍ程度の半円部と、その上部の平行部４２ａとを備えており、長手方向の長さがマンホールから挿入できる２ｍ程度の樋形状をしており、汚水が流れると共に少量の雨水が流れる部分である。
【００５２】
インバート部４２の外周には、長手方向の２個所に厚肉の補強部４２ｂが形成されている。水路構成部材４１の両端部の接合フランジ部４４，４４には、所定の間隔で複数個の連結孔４５が穿設されている。傾斜部４３，４３の勾配は、外周部から中央部に向けて１５％程度の傾斜が好ましく、大雨の時はこの部分も汚水や雨水が流れる。水路構成部材４１は、マンホールから挿入できる程度の長さであれば１〜２ｍの適宜の長さでよい。なお、インバート部４２は断面が半円形状の丸樋状をしているが、角樋状、略Ｕ状、略Ｖ状等適宜の形状を用いてもよい。
【００５３】
水路構成部材４１はガラス繊維等で補強した強化プラスチック（ＦＲＰ）等で形成され、傾斜部４３，４３の下面にインバート部４２の長手方向に沿うガイド部として、例えば６個のガイド孔４６を形成してある。ガイド孔４６は各傾斜部４３の下方に３本ずつ並べて配置され、内径が２０〜５０ｍｍ程度のパイプ状物で形成され、両端の接合フランジ部４４，４４に開口している。従って、複数の水路構成部材４１を接合フランジ部４４，４４の連結孔４５にボルトナット等を通して連結すると、ガイド孔４６は相互に連通するように構成され、このガイド孔４６に例えばガイドワイヤを挿通してマンホールから管路内に水路構成部材４１を挿入することができる。本例では、外側の２つのガイド孔４６Ａは水平方向に形成したスリットにより側方に開口している。水路構成部材４１は、長手方向に沿ってガイド孔４６，４６Ａが形成されているため、ねじれにくい形状となっており、軽量に形成されている。
【００５４】
水路構成部材４１は前記のように接合フランジ部４４，４４を対接させて連結することができるが、図１４に示すようなスペーサ４７を挟んで、６本の長ボルト４８ａと１２個のナット４８ｂで構成される連結手段４８により連結することもできる。スペーサ４７は５〜１０ｍｍ程度の厚さの合成樹脂板材から形成され、接合フランジ部４４，４４と略同一形状の本体部から２本の脚部４７ａが突出形成されている。そして、２本の脚部には複数の折線４７ｂが形成され、この折線部分で切断することにより脚部の垂直高さを調整することができる。スペーサ４７の脚部は、下水管等の管路Ｐの底面に接触するため、連結された水路構成部材４１に所望の勾配を付けることができる。スペーサ４７は合成樹脂板材以外の金属板材等から形成するようにしてもよい。スペーサ４７にはガイド孔４６と同じ位置に６個の貫通孔４７ｃが形成され、連結孔４５と同じ位置に６個の小径の貫通孔４７ｄが形成されている。
【００５５】
なお、スペーサ４７と接合フランジ部４４，４４との対接面に、漏水を防止するパッキング（図示せず）を挿入して連結することが好ましい。また、管路Ｐと水路構成部材４１との間隔を保つスペーサ４７は、接合フランジ部４４，４４同士をパッキングを介して対接させ、一方の接合フランジ部４４の対接面と反対側の面に連結手段４８により共締めして固定してもよい。
【００５６】
つぎに、前記の水路構成部材４１を地中Ｇに埋設された下水道管等の管路Ｐ内に挿入するガイド手段としてガイドワイヤＷを支持するワイヤ支持部材５０について、図１５を参照して説明する。ワイヤ支持部材５０は管路Ｐ内に水平状態に固定される断面が略コ字状のチャンネル材から形成される水平梁材５１ａと、この水平梁材の中央部から上方に向けて溶接等により固定された垂直部材５１ｂから構成された略逆Ｔ字状をしたフレーム材５１を備えている。
【００５７】
フレーム材５１は水平梁材５１ａの両端部、及び垂直部材５１ｂの上端部にエンドプレート５１ｃが溶接され、このエンドプレートに連結された３個のねじジャッキ５２により管路Ｐ内に固定される。すなわち、ねじジャッキ５２はベース板５２ａと、ベース板に垂設されたねじ軸５２ｂと、ねじ軸に螺合するクランプ５２ｃとを備え、エンドプレート５１ｃの貫通孔にねじジャッキ５２のねじ軸５２ｂが挿入され、クランプ５２ｃがエンドプレート５１ｃに当接する構成であり、クランプ５２ｃを回転させてベース板５２ａを管路Ｐの壁面に圧接させることにより、フレーム材５１は管路壁面に固定される。なお、ベース板５２ａの四隅には、４本の調整ボルトがねじ込まれ、ベース板５２ａが壁面に４点で均等に当接するように構成している。
【００５８】
そして、この水平梁材５１ａから垂下される垂直部材として長ボルトから形成される２本の吊下げ軸５３，５３とを備えている。吊下げ軸５３，５３は水平梁材５１ａの中心から均等の距離に設けられ、外周には鉛直方向の可動部としてねじ部が形成されている。吊下げ軸５３，５３の下端には、ガイドワイヤＷを支持する支持梁材５４が水平状態に連結されている。吊下げ軸５３，５３を調整することにより、支持梁材５４の上下位置を調整できる。支持梁材５４の両端部にはガイドワイヤＷの端部が固定されている。ガイドワイヤＷは図示していないフック等で支持梁材５４に連結され、チェーンブロックやターンバックル等の張力付与手段（図示せず）により略水平状態に張設される。
【００５９】
前記の如く構成された本実施形態の水路構成部材４１をマンホールＨ１，Ｈ２から管路Ｐに挿入し、連結して管路Ｐ内に水路を形成する工法について、図１６〜１８を参照して以下に説明する。
【００６０】
先ず、図１６（ａ）に示すように、２つのマンホールＨ１，Ｈ２間を互いに連通するように地中Ｇに埋設された管路Ｐ内に、複数の水路構成部材４１を挿入するときのガイドとなるガイドワイヤＷを通すためのワイヤ支持部材５０，５０をマンホールＨ１，Ｈ２から管路Ｐ内にそれぞれ固定する。すなわち、図１５に示すように、フレーム材５１の左右の端部と上方の端部のねじジャッキ５２を操作してねじ軸５２ｂを外方に繰り出すことにより、ねじ軸が管路Ｐの壁面に当接して固定される。フレーム材５１からはガイドワイヤＷを支持する支持梁材５４が吊下げ軸５３，５３により上下動可能に支持されており、吊下げ軸を調整することにより支持梁材５４の上下位置及び水平状態を調整する。
【００６１】
つぎに、固定されたワイヤ支持部材５０，５０にガイドワイヤＷを張設する工程に移る。管路Ｐ内に固定されたワイヤ支持部材５０，５０の支持梁材５４間に２本のガイドワイヤＷ，Ｗを通して、チェーンブロックやターンバックル等の張力付与手段（図示せず）を使用してガイドワイヤＷ，Ｗに張力を与える。ガイドワイヤＷとして例えばワイヤを撚り合わせた金属製のワイヤロープを使用する場合は、直径が１０〜２０ｍｍ程度のステンレス鋼のワイヤロープや鉄棒等を使用することができ、他にナイロンロープや麻ロープ等、適宜の直径のロープ等を使用してもよい。ワイヤ支持部材５０は、管路Ｐの内壁に逆Ｔ字状のフレーム材５１が３点で支持されるため、ガイドワイヤＷ，Ｗに張力を付与してもフレーム材５１が旋回や移動することなく、ガイドワイヤＷ，Ｗを強固に支持することができる。
【００６２】
前記のようにしてガイドワイヤＷ，Ｗを張設した後、図１６（ｂ）に示すように、ガイドワイヤＷ，Ｗに沿わせて水路構成部材４１を管路Ｐ内に挿入する工程に移る。この例では、一方側のマンホールＨ１から水路構成部材４１を搬入し、側方に開口するスリットを形成したガイド孔４６Ａ，４６Ａを使用し、ガイドワイヤＷ，Ｗをスリットに通してガイド孔４６Ａ，４６Ａに挿入し、１番目の水路構成部材４１を宙吊りの状態とする。
【００６３】
１番目の水路構成部材４１を管路Ｐ内に押し込み、２番目の水路構成部材４１を同様にしてガイドワイヤＷ，Ｗに支持させ、２番目の水路構成部材と１番目の水路構成部材とを接合フランジ部４４，４４で連結する。この連結は、接合フランジ部４４，４４間にスペーサ４７を挟んでボルトナット等の連結手段４８で連結する。連結手段４８としては、図１４示のように１本の長ボルト４８ａに対して、２個のナット４８ｂを螺合させることが好ましいが通常のボルトナットでもよい。水路構成部材４１を管路Ｐ内に挿入するとき、スペーサ４７が管路Ｐの底面に接触しないようにガイドワイヤＷ，Ｗの位置を高めに設定すると、挿入が容易となる。なお、ガイド孔４６ＡからガイドワイヤＷが脱落するのを防止するため、スリットに楔を打ち込むことや、スリットの開口を塞ぐようにピンを差し込むと好適である。
【００６４】
水路構成部材４１を管路Ｐ内に挿入する工程として、図１７（ａ）に示すように、下流側のマンホールＨ２に仕切り材Ｓ１を固定して汚水Ｄ１を堰き止め、この汚水Ｄ１に水路構成部材４１を浮かせて管路Ｐ内に挿入するようにしてもよい。水路構成部材４１はＦＲＰ等の樹脂で形成され、見かけの比重が小さく汚水に浮くため、管路Ｐ内への挿入が容易に行える。
【００６５】
このようにして、複数の水路構成部材４１…を順次連結して管路Ｐ内に挿入し、他方側のマンホールＨ２に到達するまで繰り返す。水路構成部材４１は軽量で、ねじれにくい形状であるため、管路Ｐ内への挿入が容易に行える。管路Ｐが供用中の既設管路の場合は、１番目の水路構成部材の先端には高さ調整のスペーサと共に先端キャップ（図示せず）を取付けて水路構成部材４１のインバート部４２に汚水が入り込むのを防止すると作業が容易となる。
【００６６】
なお、スリットを形成していないガイド孔４６，４６を用いるときは、ガイドワイヤＷ，Ｗの一端を外して１番目の水路構成部材４１のガイド孔４６，４６に通し、２番目の水路構成部材４１のガイド孔４６，４６にガイドワイヤＷ，Ｗを通して水路構成部材４１の接合フランジ部４４，４４間にスペーサ４７を挟んでボルトナット等の連結手段４８で同様に連結し、先端側の水路構成部材から順次管路Ｐ内に挿入してゆく。
【００６７】
スペーサ４７は連結された水路構成部材４１が所定の勾配となるように脚部４７ａの高さを調整して２つの接合フランジ部４４，４４の間に挟まれる。既設の管路Ｐが不等沈下により勾配が一定でない場合は、予め計測した管路の凹凸に合わせてスペーサ４７の脚部４７ａの高さを折線４７ｂにより切断して垂直高さを設定しておくと、全ての水路構成部材４１が管路Ｐに挿入されたときに所定の勾配となり好ましい。このように、スペーサ４７の脚部４７ａの高さを調整するだけで、連結された水路構成部材４１に所定の勾配を、極めて容易に付けることができる。なお、この折線４７ｂは、円弧に限らず直線でもよい。
【００６８】
このようにして、水路構成部材４１を順次ガイドワイヤＷ，Ｗに通して連結し、ガイドワイヤＷ，Ｗにガイド孔４６Ａ，４６Ａを沿わせて管路Ｐ内に挿入していく。図１７（ｂ）、図１８（ａ）は管路Ｐ内に、所定の個数の水路構成部材４１が、所望の勾配が付けられて挿入された状態を示している。水路構成部材４１…は、管路Ｐ内に挿入されるとき、ガイドワイヤＷ，Ｗにガイドされて保持されているため、作業中に大雨等で雨水の流量が急激に増量し、作業を中断しても水路構成部材４１が流されることはない。水路構成部材４１…に所望の勾配を付ける脚部４７ａの垂直高さの調整は、折線４７ｂを折ることに限らず、グラインダ等で研削して所定の高さとするようにしてもよい。また、脚部の下端にアジャスト用のねじを組み込み、調整してもよい。
【００６９】
このあと、図１７（ｂ）に示す水替えの工程に移る。上流側のマンホールＨ１の底面に仕切り板Ｓ２を固定して流下中の汚水を堰き止め、汚水Ｄ２が溜められる。図１７（ａ）の工程の場合は、下流側のマンホールＨ２の仕切り板Ｓ１を外すと、堰き止められた汚水Ｄ１は管路Ｐに沿って下流側に排水され、スペーサ４７は管路Ｐの底面と接触して連結された水路構成部材４１は所定の勾配となる。
【００７０】
仕切り板Ｓ２により溜められた汚水Ｄ２内にポンプ５８を設置し、ポンプから排水管５８ａを連結し勾配が付けられた水路構成部材４１…の上部に位置させる。ポンプ５８を作動させると汚水Ｄ２は吸い上げられ、排水管５８ａから水路構成部材４１…上に排出され、勾配により下流側（図の右側）に流れる。このように連結された水路構成部材４１…を使用して水替えをするので、別の水替え用の配管を設置する必要がなく、工程を大幅に簡略化できると共に、工期を大幅に短縮できる。
【００７１】
この水替えの工程により、汚水等は連結された水路構成部材４１…のインバート部４２を流れるため、管路Ｐの底面は汚水等が流れなくなり、この底面を清掃することも可能となり、次のコンクリート又はモルタルによる水路構成部材４１…の固定が容易となる。なお、新規の管路に水路を構成する場合は、水替えの工程は実施しない。
【００７２】
つぎに、管路Ｐ内に挿入して勾配を付けた複数の水路構成部材４１…を管路Ｐの底面にコンクリートＣ１又はモルタルで固定する工程に移る。管路Ｐの一方のマンホールＨ１側からコンクリートの圧送管をマンホールＨ２側まで挿入し、コンクリートＣ１を注入しながら圧送管を徐々に引き抜くと、コンクリートＣ１は清掃した管路Ｐの底面と水路構成部材４１…との間に注入される。コンクリートＣ１を一度に多量に注入すると、連結された水路構成部材４１…がコンクリートＣ１の勢いで移動してしまうので、接合フランジ部４４，４４の連結手段４８を埋設固定する程度の少量とする。これにより、注入時の勢いで水路構成部材４１…の移動や浮き上がりは防止され、水路構成部材４１…は図１８（ｂ）に示すように、所望の勾配が付いた状態で管路Ｐの底面に少量のコンクリートＣ１で固定される。
【００７３】
なお、コンクリートＣ１を注入するとき、ガイド孔の１つを内径が５０ｍｍ以上で下方にスリットが開口する孔（図示せず）として形成し、この孔に外径が５０ｍｍ未満のコンクリート圧送管を挿入し、コンクリートを流しながら圧送管を引き抜くと、注入されたコンクリートはスリットから下方に流れ出し、水路構成部材４１…と管路底面との間に確実に注入され、水路構成部材４１…が圧送管の移動で変位することを防止できる。
【００７４】
コンクリートＣ１の注入後、所定時間経過して固定された水路構成部材４１…を支持しているガイドワイヤＷ，Ｗを取外す工程に移る。前記の工程で連結固定された水路構成部材４１…は、コンクリートＣ１により接合フランジ部４４，４４の連結手段４８が固定されているため、ガイドワイヤＷ，Ｗを取外しても水路構成部材４１…は所定の位置から移動することはない。ガイドワイヤＷ，Ｗやワイヤ支持部材５０は取り外し後、次の工程で再度使用することができる。
【００７５】
この状態でコンクリート又はモルタルを再度注入し、図１８（ｃ）に示すように、水路構成部材４１の傾斜部４３，４３の下方の空間をコンクリートＣ２で充填して固定する。この工程により水路構成部材４１…は管路Ｐに確実に固定される。そして、水路構成部材４１…の傾斜部４３，４３と管路壁面との間は、コンクリートＣ２で充填され、コンクリートＣ２の上面は平坦になり、管路Ｐ内にインバート部４２に相当する新規の水路が所望の勾配をもって形成される。
【００７６】
このようにして、例えば老朽化して勾配が変化してしまった状態の既設の管路Ｐ内に、新規の水路を構成することができ、汚水はインバート部４２で形成される新規の水路部分を漏水も無く、また窪みによって滞留することも無く所定の勾配によって流下し、流量が増したときにはインバート部４２で形成される水路部分と傾斜部４３，４３とを使用して流下することができる。さらに、滞留による臭気の発生も防止することができる。
【００７７】
このように老朽化した管路Ｐに新規の水路を構成することにより管路Ｐは補強され、さらに長期間使用することができる。そして、汚水等が安定して排水できるため、オイルボール等が発生することを回避でき、公共水域の保全が達成される。また管路Ｐ内に水路構成部材４１…を連結して新規の水路を構成したとき、ガイド孔４６は水路に沿って連通しているため、この孔を利用して光ファイバーや、他のケーブル等を挿通することができる。
【００７８】
なお、コンクリートＣ１を注入して所定時間経過して水路構成部材４１…が固定されたあと、ガイドワイヤＷ，Ｗを取外す前にコンクリートＣ２を充填して固定を行い、そのあとにガイドワイヤＷ，Ｗを外すように工程を前後させてもよい。また、前記の工程では、マンホールＨ１，Ｈ２間の区間の水路構成について述べたが、同様の工程により次の隣接する区間の水路構成を行い、所定の区間の水路構成を順次行って老朽化した管路Ｐ内に新規の水路を構成するものである。最初の区間に連結された水路構成部材４１…と、次の区間に連結された水路構成部材４１…とは別の水路構成部材で連結するか、或いはマンホールに相当する部分にコンクリートやモルタルでインバート部を形成して連結する。
【００７９】
さらに、前記の工程では、水路構成部材４１を管路Ｐ内に挿入する際のガイドとなるガイドワイヤＷを張設するワイヤ支持部材５０を用いる例を示したが、このような部材を使用せずに、図１９に示すようにガイドワイヤＷ，Ｗを張設するようにしてもよい。すなわち、図１９において、マンホールＨ１，Ｈ２の上部に架台Ｋ１，Ｋ２を設置し、一方の架台Ｋ１はガイドワイヤを巻き取るウィンチ５５が固定され、両方の架台はマンホール内に挿入する２本の垂直軸５６を支持している。垂直軸５６は下端に滑車５７やプーリが固定されている。なお、この例で、マンホールＨ１，Ｈ２の間に別のマンホールＨ３がある場合は、中間のマンホールＨ３を通過してガイドワイヤＷを張設することができる。
【００８０】
この例で、ガイドワイヤＷを張設する場合は、一方の架台Ｋ１のウィンチ５５を巻き戻してガイドワイヤＷを伸ばし、マンホールＨ１を下降させ滑車５７，５７を用いて管路Ｐを経由してマンホールＨ２を上昇させ、ガイドワイヤＷの一端を架台Ｋ２に固定する。そして、ウィンチ５５を巻き取るとガイドワイヤＷに所定の張力が付与され、管路Ｐ内に張設される。
【００８１】
なお、複数のマンホールが比較的接近して埋設されている場合は、複数のマンホールを連続するように、水路を構成することができる。例えば３つ或いは４つのマンホール間を連続して水路を構成する場合、両端の２つのマンホールからガイドワイヤを挿入し、中間のマンホールを通過するようにガイドワイヤＷを張設し、ガイドワイヤＷに沿わせて３つ或いは４つのマンホール間を連続する管路Ｐ内に水路構成部材４１…を挿入することができる。
【００８２】
また、コンクリートＣ１を注入するとき、図２０に示すように押付け治具５９を使用して、水路構成部材４１と管路Ｐとの間に挿入し、水路構成部材がコンクリートの圧力で浮き上がるのを防止すると好ましい。押付け治具５９は管路Ｐの上部壁面に当接する上部当て板５９ａと、この上部当て板に揺動可能に連結される２つの略Ａ字状のアーム５９ｂと、このアームの脚に固定される４つの下部当て板５９ｃとを備えており、これらを必要な長さだけ連結して構成され、支持ワイヤＳＷに沿って管路Ｐ内に挿入される。
【００８３】
この例では、水路構成部材４１は破断した管路Ｐの底面とスペーサ４７Ａ，４７Ｂで間隔が保たれて勾配が付けられている。管路Ｐが途中で破断しているときでも、管路Ｐをモルタル等で補修したあと押付け治具５９のアーム５９ｂを揺動させて、４つの下部当て板５９ｃを水路構成部材４１の傾斜部又はフランジ部分に当接させ、上部当て板５９ａを管路Ｐの上部壁面に当接させることにより水路構成部材４１を下方に押付けることができ、コンクリートやモルタルの注入時に水路構成部材４１が浮き上がり、移動することを防止できる。さらに、図示していないが、押付け治具５９の代わりに、水路構成部材と管路の上面との間にエアバックを挿入し、これに空気を注入して膨らませることにより水路構成部材の浮き上がりを防止することもできる。
【００８４】
本発明に係る水路構成部材の他の実施形態を図２１に基づき詳細に説明する。図２１は本発明に係る水路構成部材の他の実施形態を示し、（ａ）は要部断面図、（ｂ），（ｃ）はそれぞれ小径、大径の管路に固定した状態の概略断面図である。なお、この実施形態は前記した実施形態に対し、水路構成部材は、傾斜部の端部に連続する補助傾斜板部を、さらに備えるものである。そして、他の実質的に同等の構成については同じ符号を付して詳細な説明は省略する。
【００８５】
図２１において、水路構成部材４１のインバート部４２の上端に連続する傾斜部４３，４３の端部には、可撓性を有するゴム製の補助傾斜板部４３Ａ，４３Ａが連続している。すなわち、補助傾斜板部４３Ａ，４３Ａは、内側の端部に係合溝が形成され、この係合溝で傾斜部４３，４３に嵌合固定されている。補助傾斜板部４３Ａ，４３Ａは必要に応じて鋏等で任意の幅に切断することができ、所定の幅に切断して管路の内壁面と傾斜部とを任意の曲率で、或いは直線的に連結することができ、補助傾斜板部４３Ａと管路Ｐの内壁面とは弾接することが好ましい。
【００８６】
前記と同様の水路構成工法によって、管路Ｐ内に所望の勾配をもって水路構成部材４１…を連結したときに、上流側の水路構成部材４１は傾斜部４３，４３と管路内壁面との間隔が大きくなり、下流側は傾斜部４３，４３と管路内壁面との間隔が小さくなるが、この実施形態においては、補助傾斜板部４３Ａ，４３Ａが湾曲して間隔部分を連結するため、水路構成部材４１の下方にコンクリートＣ２を容易に充填することができ、傾斜部４３，４３と管路Ｐの内壁面との間に段差ができないため汚水等が滞留することがなくなり、汚水等は円滑に流下することができ、臭気等を発生することはない。
【００８７】
また、図２１（ｂ）のように小径の管路Ｐ１の場合、補助傾斜板部４３Ａ，４３Ａは湾曲して内壁面に弾接し、図２１（ｃ）のように大径の管路Ｐ２の場合、補助傾斜板部４３Ａ，４３Ａは直線的に内壁面に弾接する。さらに大径の管路の場合、幅がさらに大きい補助傾斜板部を連結することも可能である。補助傾斜板部は、係合溝に嵌合させて連結することに限らず、接着剤で固定してもよく、ビス止め等で連結するようにしてもよい。
【００８８】
つぎに、水路構成部材のさらに他の実施形態を、図２２を参照して説明する。この実施形態に示す水路構成部材６０は、前記した実施形態と比較して、ガイドワイヤＷでガイドして支持されるガイド部が断面積の大きいガイド孔６５より形成されることを特徴としている。すなわち、ガイド孔６５はインバート部６１の下方と傾斜部６２の外方とを連結する三角柱状をしており、断面積が大きく形成され、剛性が高くねじれにくい形状であり、汚水等に浮かせた状態で浮力が大きく作用する形状をしている。そして、インバート部と傾斜部の外側に接合フランジ部６３が形成され、６個の連結孔６４が開いている。
【００８９】
この水路構成部材６０を管路Ｐ内にガイドワイヤＷに沿わせて挿入し、コンクリートＣ１，Ｃ２等で固定したあと、ガイド孔６５を構成するインバート部６１と傾斜部６２の壁面を除去することにより、汚水等の流れる水路部分の断面積を大きくすることができ、管路Ｐ内に水路を構成したときの水路の断面欠損を最小とすることができ、流量を大きくすることができる。
【００９０】
また、ガイド孔６５の断面積が大きく、汚水等を堰き止めて水路構成部材６０を浮かして管路Ｐ内に挿入するとき、浮力が大きく作用するため挿入が容易に行える。この水路構成部材６０の場合、インバート部６１と傾斜部６２の壁面を除去しなくても、水路構成部材６０，６０を連結するマンホールのインバート部の幅をガイド孔の幅と同じに大きくすることにより、汚水や雨水をガイド孔６５に流すことができ、断面欠損を少なくできる。
【００９１】
なお、前記した実施の形態では、ガイドワイヤで案内されるガイド部として、片側に３個のガイド孔の例を示したが、図２３（ａ）に示すような３対のガイド溝４６ａを有する水路構成部材４１Ａや、図２３（ｂ）に示すような１対のスリット４６ｂを有する水路構成部材４１Ｂ等でもよく、また個数は３個に限らず、１個でも、さらに多数でもよい。前記のガイド溝やスリットの場合、ガイドワイヤを開口部から挿入できるため、水路構成部材を管路に挿入するときにガイドワイヤの一端を外さずにガイドすることができる。ガイド溝やスリットの入口の幅をガイドワイヤの径より僅かに小さく設定すると、嵌合されたときに安易に外れることがなく好ましい。
【００９２】
また、図２４に示す水路構成部材は、（ａ）に示す通常型の水路構成部材７０と、（ｂ）に示す浅型の水路構成部材７５がある。水路構成部材７０のインバート部７１は半円状をしており、インバート部７１の上端から傾斜部７２が連続しており、傾斜部７２の下方にガイド部７３が形成されている。水路構成部材７５のインバート部７６は開口幅が大きく曲率半径の大きい円弧で形成され、インバート部７６の上端から傾斜部７７が連続しており、その下面にガイド部７８が形成されている。浅型の水路構成部材７５は、管路Ｐの低い位置に固定できるため、適正勾配を保ちつつ管路Ｐの断面欠損を少なくできる。
【００９３】
前記した実施の形態では、支持部材１０に宙吊り状態に支持される支持体２０として、断面が略コ字状の支持体の例を示したが、断面が略Ｌ字状のアングル材や、断面が矩形状の支持体を用いてもよいのは勿論である。また、２本の支持体を連結する幅止めも、アングル２４に限られるものでなく、適宜の断面形状を有するものを使用してもよい。
【００９４】
管路内に水路構成部材を固定する工程において、途中までコンクリートＣ１を注入する仮固定と、上部までコンクリートＣ２を注入する本固定に分けて固定する例を示したが、支持部材による水路構成部材の支持を、例えば水路構成部材の内側にする等の変更を行い、１度で上部までコンクリートを注入するようにしてもよい。また、仮固定を接着剤等で行い、本固定を充填剤やコンクリートで行うようにしてもよい。
【００９５】
さらに、２本のレール状の支持体２０に、水路構成部材１を固定する手段として蝶ねじ２１を示したが、これに限られるものでなく、例えばビス止めやボルト止め等や、他の固定手段を使用してもよい。支持部材と管路の壁面との固定はねじジャッキで圧接する例を示したが、例えばラックピニオン等の機構やバネを用いた弾接機構等を用いて壁面を押圧して固定するように構成してもよい。また、吊下げ軸の可動部として、外周ねじ部とダブルナットによって鉛直方向の位置を調整する例を示したが、ウォームギヤ等の他の機構を用いて調整するようにしてもよい。
【００９６】
また、水路構成部材は合成樹脂製に限られるものでなく、金属板材を屈成して形成したもの等、適宜のものを採用できる。ガイドワイヤＷを支持するワイヤ支持部材５０は前記した構成に限られず、ガイドワイヤを張った状態に支持できるものであれば、どのような構成でもよい。さらに、本発明は、老朽化した既設の管路内に水路を構成するものに限らず、新規の管路内に水路を構成するものにも適用できることは勿論である。
【００９７】
管路内にガイド手段を張設する工程で、ワイヤ支持部材を使用する例や、架台に垂直軸を支持して垂直軸の下端の滑車を用いてガイドワイヤを張設する例を示したが、これらの部材や架台を用いずにマンホール内に木材を組み合わせて仮枠を現場施工で構成し、この仮枠を使用してガイドワイヤ等を張設するように構成してもよく、ガイド手段を張設する構成は問わない。
【００９８】
【発明の効果】
以上の説明から理解できるように、本発明の管路内における水路構成工法は、工程を大幅に簡略化でき、工事期間の大幅な短縮と、コストの大幅な低減が可能となる。また、管路が供用中であり、汚水等が流下している状態でも、勾配を付けて連結した水路構成部材に水替えすることができるため、水替え配管を別途に設置する必要がなく、工程を大幅に簡略化でき、工期を大幅に短縮できる。
【００９９】
また、本発明の他の水路構成工法は、下地コンクリートを打設する工程を省略でき、工期を短縮することができ、水路構成部材の支持が容易に行えると共に、支持部材を何度でも使用することができるため、コストを低減できる。さらに、勾配を容易に設定でき、しかも精度よく連続的に設定できるため、汚水等を円滑に流下させることができ、滞留や臭気の発生を防止できる。
【０１００】
本発明の水路構成部材は、開口端部及び支持フランジ部を補強されているため破損することが少なく、施工が容易となる。また、水路構成部材をコンクリート等で固定したとき、上端と支持フランジ部と間に所望のコンクリート厚が取れるため、コンクリート等のひび割れを防止できると共に、水路構成部材の耐久性を向上させることができる。
【０１０１】
本発明の他の水路構成工法は、水路構成部材に垂直高さを調整したスペーサを固定して連結するため、水路構成部材の所望の勾配を容易に付けることができる。また、少なくとも２つのマンホール間にガイドワイヤ等のガイド手段を張設し、このガイド手段に沿わせて水路構成部材を順次連結して管路内に挿入するため、人が入れないような管径の小さい管路でも管路内に新規の水路を構成することができる。さらに、工程が簡略化できるため、短期間で、しかも低コストで管路内に水路を構成することができる。
【０１０２】
水路構成部材を連結するとき、接合フランジ部に高さを調整できるスペーサを固定し管路の底面に対接させると、連結された水路構成部材に任意の勾配を付けることができる。水路構成部材の管路への固定は、先ず少量のコンクリート等で水路構成部材の連結手段を固定したあと、水路構成部材と管路との間をコンクリート等で充填するように２段階とすると、水路構成部材が移動することなく安定して固定でき、水路構成部材の下方へのコンクリート等の充填により水路構成部材が浮き上がることなく確実に行える。連結された水路構成部材に水替えすると、別の水替え用の配管等が不要となり工程を簡略化でき、部材を節減できると共にコストを低減できる。
【０１０３】
本発明の他の水路構成部材は、インバート部に連続する傾斜部を備えており、傾斜部の下面にガイド部を備えているため、軽量でねじれにくい形状とすることができる。また、マンホール間に張設したガイドワイヤに沿わせて管路内に挿入でき、接合フランジ部を連結して管路内に新規の水路を容易に構成することができる。さらに、傾斜部の端部に補助傾斜板部を連続させると、水路構成部材の下方にコンクリートやモルタルを容易に充填でき、水路構成部材と管路との間に段差ができず汚水等が滞留することを防止できる。
【図面の簡単な説明】
【図１】本発明に係る水路構成工法に用いる水路構成部材を示し、（ａ）は平面図、（ｂ）は一部を破断した正面図、（ｃ）は（ｂ）の一部を破断した側面図。
【図２】（ａ）は図１の要部拡大断面図、（ｂ），（ｃ）はそれぞれ補強材の他の例の断面図。
【図３】管路内の低い位置に固定された支持部材を示す断面図。
【図４】図３の一部を側面図としたＡ−Ａ線断面図。
【図５】管路内の高い位置に固定された支持部材を示す断面図。
【図６】水路構成工法の各工程を示す管路の概略縦断面図。
【図７】水路構成部材を連結して勾配を付けて支持した状態の一部破断平面図。
【図８】図７の一部破断側面図。
【図９】図６（ｃ）の工程の他の例を示す断面図。
【図１０】湾曲している管路の平面図。
【図１１】（ａ）は図１０の管路に使用する曲がりコマの平面図、（ｂ）は（ａ）の概略斜視図。
【図１２】本発明に係る水路構成部材の他の実施形態を示し、（ａ）は一部を破断した平面図、（ｂ）は一部を破断した正面図。
【図１３】（ａ）は図１２の水路構成部材の側面図、（ｂ）は図１２のＡ−Ａ線断面図。
【図１４】（ａ）は水路構成部材に挟むスペーサの正面図、（ｂ）は（ａ）のスペーサを挟んで連結した水路構成部材の要部の連結状態図。
【図１５】ガイドワイヤを支持する支持部材を管路に固定した状態の管路断面図。
【図１６】他の水路構成工法の各工程を示し、（ａ）はガイドワイヤを張設した状態、（ｂ）は水路構成部材を挿入する状態のマンホールと管路の概略断面図。
【図１７】図１６の工程に続く各工程を示し、（ａ）は水路構成部材を挿入する他の状態、（ｂ）は水替えの工程を示すマンホールと管路の概略断面図。
【図１８】他の水路構成工法の各工程を示す管路の概略断面図。
【図１９】ガイドワイヤを張接する他の工程の例を示す管路の概略断面図。
【図２０】コンクリートで水路構成部材を固定する前工程の他の例を示し、（ａ）は水路構成部材の押付け治具の概略斜視図、（ｂ）は管路の概略断面図。
【図２１】本発明に係る水路構成部材のさらに他の実施形態を示し、（ａ）は要部断面図、（ｂ），（ｃ）はそれぞれ小径、大径の管路に固定した状態の概略断面図。
【図２２】本発明に係る水路構成部材のさらに他の実施形態を示し、（ａ）は要部断面図、（ｂ）は管路に固定した状態の概略断面図。
【図２３】（ａ）、（ｂ）はそれぞれ水路構成部材のガイド部の他の例を示す断面図。
【図２４】（ａ）、（ｂ）はそれぞれ水路構成部材の他の例を示す管路の断面図。
【符号の説明】
１水路構成部材、２インバート部、
３接合フランジ部、５支持フランジ部、
７アングル材（補強材）、
１０支持部材、
１１水平梁材（水平部材）、
１５吊下げ軸（垂直部材）、
２０支持体、２１蝶ねじ、
２５吊下げ部材、
４１，４１Ａ，４１Ｂ水路構成部材、
４２，６１インバート部、
４３，６２傾斜部、
４３Ａ補助傾斜板部、
４４，６３接合フランジ部、
４５，６４連結孔、
４６，４６Ａ，６５ガイド孔（ガイド部）、
４６ａガイド溝（ガイド部）、
４６ｂスリット（ガイド部）、
４７スペーサ、４７ａ脚部、
４８連結手段、５０ワイヤ支持部材、
７０，７５水路構成部材、
７１，７６インバート部、
７２，７７傾斜部、
７３，７８ガイド部、
Ｐ管路、
Ｗガイドワイヤ（ガイド手段）、
Ｈ１，Ｈ２マンホール、
Ｃ１コンクリート、Ｃ２コンクリート
Ｃａ傾斜面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction method of a water channel in a pipeline such as a newly installed sewage pipe or an aging existing sewage pipe, and in particular, to ensure a smooth flow of sewage at a small flow rate or due to aging. The present invention relates to a waterway construction method capable of efficiently forming a new waterway having a predetermined gradient in a pipe line that has a predetermined gradient and sometimes has a reverse gradient. Furthermore, the present invention relates to a waterway component that can efficiently construct a new waterway in a pipe that has a small diameter and cannot be entered by a person, and a waterway configuration method that uses the waterway component.
[0002]
[Prior art]
Conventionally, as this kind of waterway construction method, there is a waterway construction method described in Japanese Patent No. 2704976. In this method, the concrete is placed in the pipe bottom surface in the pipe direction, and the opening end face along the axis of the rod-like body and the protruding edge extending in the radial direction are integrally formed on the axial end face. A fastening member insertion hole is provided at the protruding edge of the axial end surface, and a waterway component member provided with anchor member attachment portions on both sides of the bowl-like body is arranged on the ground concrete and the mutual is interposed through the fastening member. And a step of attaching the anchor member to the anchor member mounting portion of the water channel constituent member and fixing the anchor member to the pipe line, and a step of placing cement mortar between the water channel constituent member and the pipe inner surface. .
[0003]
Further, the placement of the ground concrete in the above-mentioned construction method is omitted, and the waterway constituent members are arranged and connected to each other in the pipe, and a spacer is inserted between the waterway constituent member and the inner surface of the pipe. The gradient and posture are adjusted, and the water channel constituent member is fixed in the pipe. The present invention also provides a canal-shaped waterway constituent member that can be easily installed and connected in a pipeline, and provides a waterway method that can be easily constructed and that does not cause interface peeling even after mortar placement.
[0004]
[Problems to be solved by the invention]
By the way, the waterway construction method of the above structure is in line with a section where a new waterway is constructed by blocking the sewage and the like when the pipe is in service with an existing pipe and sewage is flowing into the sewer pipe. Therefore, it was necessary to construct a new water channel after installing a water replacement pipe and flowing sewage into the newly installed water replacement pipe. For this reason, the process which installs water replacement piping for every area is needed, and since the process increased, work became complicated, and there existed a problem that work cost became long and cost increased.
[0005]
In addition, a large number of anchor members are attached to a large number of anchor member mounting portions of the water channel constituent member to fix the water channel constituent member to the pipe line, and a spacer is used to make a desired gradient, and the existing pipe line and the water channel constituent member are The interval is set. And since anchor members and spacers are all buried in the mortar after the mortar is placed, these members cannot be used again, and a large number of members are required for each water channel configuration. In addition, it requires a draining process in the pipe for placing the ground concrete and a process for placing the ground concrete, which requires many construction periods and increases the cost of the waterway configuration. was there.
[0006]
And since the waterway construction method of the said structure attaches an anchor member to the anchor member attaching part of a waterway constituent member, and fixes it to a pipe line, it was necessary for a person to enter and work in a pipe line. For this reason, there was a problem that a new water channel configuration could not be made with a small-diameter pipe that cannot be entered by a person.
[0007]
The present invention has been made in view of such a problem, and the purpose thereof is that a step of installing a water replacement pipe is unnecessary, and by utilizing a water channel component member having a slope, It is possible to change the water flow of sewage flowing into the sewer pipes in service without installing a separate water replacement pipe, etc., thus providing a waterway construction method that can drastically reduce costs and greatly shorten the process. .
[0008]
In addition, the process of placing the ground concrete is unnecessary, the construction period can be shortened, the water channel component can be easily supported, and the support member can be used any number of times. The object is to provide a waterway construction method in a pipeline that can be reduced. It is another object of the present invention to provide a method for constructing a water channel in a pipeline in which the gradient of the water channel can be accurately adjusted by a support member, and sewage or the like flows stably through the new water channel. And even if the pipe diameter is small enough to prevent people from entering it, it is possible to configure the water channel with an arbitrary gradient, and it is possible to configure a new water channel on the bottom of the pipe, and the process is simple and the water channel is formed. An object of the present invention is to provide a waterway constituent member which can be easily performed and a waterway constituent method using this waterway constituent member.
[0009]
[Means for Solving the Problems]
 In order to achieve the above object, the waterway construction method in the pipeline according to the present invention is a construction method for constructing a new waterway in the pipeline buried in the ground, and is open upward in the pipeline. A step of connecting a water channel component formed with a bowl-shaped invert portion through which sewage can flow along the longitudinal direction, a step of applying a desired gradient to the connected water channel component, and a gradientAn upstream water channel that has already been repaired is spaced to form a new water channel, a water channel component is inserted into the space to connect the upstream water channel and the new water channel, and the upstream water channel and Run sewage through a new channelA step of water replacement and a step of fixing the water channel constituent member to the pipe.
[0010]
As the water channel component member, an appropriate one can be used, such as a half pipe, one in which the upper part of the invert part is reinforced, one having an inclined part at the upper end of the invert part, one in which an auxiliary inclined part is continued at the end of the inclined part . When inserting these waterway constituent members into the pipeline, the rail-like support is supported by a support member fixed to the inner wall surface of the pipeline, and can be inserted along the support, and can also be inserted into the pipeline. A guide wire may be stretched along the guide wire and inserted along the guide wire.
[0011]
 According to this configuration, the water channel constituent member forming the invert part is connected and inserted into the pipe to give a gradient, and the connected water pipe constituent member having the gradient is fixed to the pipe. It can be greatly simplified, and the construction period can be greatly shortened and the cost can be greatly reduced. Moreover, since the process of flowing the sewage etc. which are in service to the waterway structural member with which the gradient was attached is provided, piping for a separate water change is not required and construction work can be made easy.
[0012]
 In addition, another waterway construction method according to the present invention is a construction method for constructing a new waterway in a pipe buried in the ground, and is opened upward in the pipe and sewage etc. along the longitudinal direction. Inverted part that can flowAnd a support flange portion extending outward from the invert portionThe waterway component that formedSaidDepending on the support memberIn the support flangeThe process of supporting in suspension, the process of adjusting the vertical position of the water channel component supported by the support member to give a gradient to the water channel component, and fixing the water channel component in the pipeline with the gradient And a step of removing the support member. As the water channel constituent member, an appropriate bowl-shaped member that opens upward, such as a semicircular section, a square bowl-shaped section, a substantially U-shaped section, or a substantially V-shaped section, can be adopted.
[0013]
According to this configuration, the support member is adjusted to be suspended by hanging the support member by adjusting the support member, and then fixed with concrete or mortar or the like in a state where the slope is provided, and the support that supported the canal component Since the member is removed, the process can be simplified and the support member can be used again. For this reason, the cost of a water channel structure can be reduced significantly.
[0014]
When the pipelines that make up the new channel are existing pipelines, as a pre-process of the step of fixing the channel components to the pipeline with a gradient, a water changing step of flowing sewage etc. through the channel components It is preferable to provide. According to this configuration, since the sewage in service can be made to flow in a suspended water channel with a gradient, it is possible to easily carry out water change work that requires a great amount of cost. It becomes unnecessary.
[0015]
Moreover, as a preferable specific aspect of the waterway construction method in the pipe according to the present invention, the support member includes a horizontal member fixed to the pipe in a substantially horizontal state and a vertical member suspended from the horizontal member. The vertical member is composed of a suspension shaft provided with a movable part, and the vertical position of the waterway component member is adjusted by moving the suspension shaft. It is characterized by. As the movable part, a hanging shaft having a screw part formed on the outer periphery is suitable. According to this configuration, since the support member that supports the water channel component member is configured by a horizontal member and a vertical member, and the vertical member in which a movable portion such as a screw portion is provided on the outer periphery, the vertical position of the water channel component member can be adjusted. The gradient of the water channel can be set continuously and accurately.
[0016]
Furthermore, as another preferable specific aspect of the waterway construction method in the pipe according to the present invention, the waterway construction member is fixed and supported by a support body supported suspended in the air along the pipe by the support member. The support is preferably a member continuous in the pipe direction. According to this configuration, since the water channel component member is fixed to, for example, two rail-shaped supports that are suspended in advance along the pipeline by the support member, the water channel component member can be easily supported, The gradient can be set continuously and accurately. Moreover, it is possible to easily carry in the water channel constituent member to the pipe using this support.
[0017]
 Waterway construction method in a pipeline according to the present inventionOtherAs an aspect,This is a method of constructing a new water channel in a conduit buried in the ground, and a channel configuration in which a bowl-shaped invert portion that opens upward and allows sewage and the like to flow along the longitudinal direction is formed in the conduit. A step of connecting the members while being supported by the support member, a step of adding a desired gradient to the connected water channel components, and a step of fixing the water channel components to the pipelines with a gradient.The waterway component is between the pipe and the waterway component.To prevent movement of waterway componentsConcrete or mortar is injected and temporarily fixed to a height of 10 mm, and after the support member is removed, concrete or mortar is injected and fixed to the upper part of the waterway constituent member.To prevent movement of waterway componentsThe height of the water channel is temporarily fixed at a height that is about half of the total height of the water channel component that can maintain the desired gradient without moving the water channel component when the support member is removed.Is the heightThen, when concrete or mortar is poured next, the water channel component is not moved. Accordingly, concrete or the like can be placed in an inclined state up to the upper end portion of the water channel component member from which the support member is removed, and water can be stably guided from the peripheral portion of the water channel component member to the water channel of the central invert portion.
[0018]
 The waterway constituent member according to the present invention constitutes a new waterway in a conduit buried in the ground, and is an invert part constituting a waterway through which dirty water flows.The invert part has a joining flange part extending at right angles toward the outside at both ends in the longitudinal direction,Slightly below the opening end aboveOutwardExtending support flangeTo reach the connecting flange continuously along the open endIt is formed and is characterized by reinforcing the opening end portion and the support flange portion. As reinforcement, it is preferable to incorporate a metal angle member having a substantially L-shaped cross section connecting the opening end portion and the support flange portion as a reinforcement member.
[0019]
According to this configuration, since the opening end portion and the support flange portion are reinforced, for example, even when a person steps on the water channel constituent member, the water channel constituent member is less likely to be damaged. Even if sewage enters the gap between the two and the buoyancy acts on the waterway constituting member, it will not be deformed. In addition, the support flange extends slightly downward from the upper end of the opening end, and a predetermined distance is secured between the upper end and the support flange, so that the thickness of the concrete or the like corresponding to this distance can be secured, and cracks can be generated. Can be prevented. This waterway constituent member is applicable not only to the above-mentioned waterway construction method but also to a conventional construction method for waterways.
[0020]
Another aspect of the waterway construction method in the pipeline according to the present invention is a construction method for constructing a new waterway in the pipeline buried in the ground, and the sewage and the like are open upward and along the longitudinal direction. A step of fixing and connecting a spacer whose vertical height is adjusted to a waterway component member in which a flowable bowl-shaped invert part is formed, and a step of fixing the connected waterway component member in contact with the bottom surface of the pipe WithIt is characterized by that.The step of fixing and connecting the spacer to the water channel component member is carried out by extending the pipe channel member through guide means such as a guide wire, the water channel component member is suspended in the guide means, and then the water channel component member is piped. It is preferable to fix to the road.It is preferable that the pipes communicate with each other between at least two manholes. A large number of waterway constituent members are carried from the manholes, inserted into the pipes, and connected to form a waterway.
[0021]
The waterway construction method in the pipeline of the present invention configured as described above isIn the pipeline, the spacer is fixed and connected to the waterway component, and the vertical height of the spacer is adjusted to give the desired gradient, so the waterway component is connected and fixed easily in the pipeline. can do. Moreover, in the step of fixing and connecting a spacer to the waterway constituent member,Guide means such as a guide wire in the pipelinethroughStretched and guidewireAlongLet the waterway componentsHanging in the airSequentiallyConnect, Fix the waterway component to the pipe and fix the guide wireWhen removedEven if it is a small diameter pipe line that cannot be entered by a person, a new water channel can be constructed. And since a process is simple, it can construct with a short construction period and low cost. Needless to say, this waterway construction method can be applied to a pipe having a large pipe diameter that can be inserted by a person.
[0022]
 Another aspect of the above waterway construction method is a construction method for constructing a new waterway in a pipe line buried in the ground, and the manhole is opened upward and sewage flows along the longitudinal direction. In the manhole, the process of carrying in the waterway component that formed the ridge-like invert part and the spacer capable of adjusting the vertical height,The waterway constituent members to which the spacer is fixed are connected to each other, and the vertical height is adjusted by the spacer.The step of sequentially inserting into the conduit while the spacer is brought into contact with the bottom surface of the conduitOn the pipelineAnd a fixing step.
 Still another aspect is a method of constructing a new water channel in a pipeline buried in the ground, and a bowl-shaped invert portion is formed that opens upward and allows sewage and the like to flow along the longitudinal direction. A step of fixing and connecting a spacer whose vertical height is adjusted to the water channel component, and a step of fixing the water channel component to the pipeline by bringing the connected spacer into contact with the bottom surface of the pipeline; The step of fixing and connecting a spacer to the water channel component member is carried out by extending the guide channel through the guide means, and the water channel component member is suspended in the guide means, and then the water channel component member Is fixed to the pipe line.
 Yet another embodiment is a method of constructing a new water channel in a conduit buried in the ground, the end of which is located between the upstream manhole and the downstream manhole. A guide means supported by a manhole is stretched, and in one manhole, a waterway component member formed in a bowl-like invert portion that opens upward and allows sewage or the like to flow along the longitudinal direction is sequentially carried in, Inserting the water channel constituent member into the pipe while sequentially connecting the water channel constituent member along the guide means in a suspended state, fixing the water channel constituent member to the pipe, and then removing the guide means It is characterized by.
[0023]
 Spacer on the joint flange of the waterway componentSandwichIf it fixes and adjusts the vertical height of a spacer so that it may become short gradually, for example, a desired gradient can be given to a channel constituent member. The connecting means of the waterway constituent member is first fixed with a small amount of concrete, and then when the concrete is filled between the waterway constituent member and the pipe and fixed, the waterway constituent member can be fixed at a predetermined position without moving. it can. When the pipeline is already in use and is in service, the water can be changed to a waterway constituent member connected with a gradient, so that a separate pipeline for changing the water becomes unnecessary, and the cost can be reduced.
[0024]
 Another waterway constituent member according to the present invention is a waterway constituent member that forms a new waterway in a pipe buried in the ground, and is a bowl-shaped member that opens upward and allows sewage and the like to flow along the longitudinal direction. Invert part is formed, invert partInverted portions having joint flange portions extending at right angles toward the outside at both ends in the longitudinal directionThe lower surface of the inclined portion forms a continuous inclined portion that rises outward from the upper end of theOr joint flangeInFor guide means for supporting the channel componentA guide portion is formed. Thereby, a water channel component can be made into the shape which is lightweight and is hard to twist. The invert portion may have an appropriate shape such as a semicircular cross section, a square hook shape, a substantially U shape, or a substantially V shape. In addition, the guide portion is preferably configured by a guide hole into which guide means such as a guide wire is inserted, a guide groove, a slit, or the like.
[0025]
 Moreover, as a preferable specific aspect of the other water channel component according to the present invention, it is continuous with the end of the inclined portion.FlexibleAn auxiliary inclined plate portion is further provided. The auxiliary inclined plate is flexible and can be bent freely, or a thin plate that can be cut arbitrarily.AndIt is preferable that the inclined portion is connected by bonding or the like, is fitted and connected to a groove formed at the end of the inclined portion, or is fixed and connected by a screw or the like.
[0026]
Furthermore, since the water channel component member forms the guide portion along the longitudinal direction on the lower surface of the inclined portion, it has a shape that is difficult to twist, and the construction in the pipeline is easy. In addition, by forming the guide section, the rigidity can be increased and the apparent specific gravity can be reduced, making it easy to transport and carry into the pipeline. Can be inserted into the pipeline. If the guide section is a guide hole with a large cross-sectional area, and the water channel component is fixed in the pipe, and the upper surface of the guide hole is removed, the cross-sectional area of the water channel can be increased. Can do.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a waterway construction method in a pipeline according to the present invention will be described in detail with reference to the drawings. First, a water channel component for configuring a new water channel in the pipe will be described. 1A and 1B show a waterway component according to the present embodiment, wherein FIG. 1A is a plan view, FIG. 1B is a front view with a part broken away, FIG. ) Is an enlarged sectional view of a main part of FIG. 1, and FIGS. 2B and 2C are sectional views of other examples of the reinforcing material. 1 and 2, the water channel component 1 is basically shaped like a cylinder divided in half along the axial direction. For example, the invert part 2 having a semicircular cross section has a diameter of about 50 cm and is long. It has a bowl shape of about 2m. At both ends in the longitudinal direction of the water channel constituent member 1, joint flange portions 3, 3 extending at right angles toward the outside are formed, and a plurality of connecting holes 4 are formed at predetermined intervals.
[0028]
As shown in FIG. 2 (a), the water channel component 1 has a bowl shape, and as shown in FIG. 2 (a), it is slightly below the upper opening end, preferably about 30 mm below, along the longitudinal direction. The support flange portions 5 and 5 are formed in the support flange portions 5 and 5, and a plurality of support holes 6 are formed at predetermined intervals and a notch 6 a is formed. The water channel component 1 is made of reinforced plastic (FRP) reinforced with glass fiber or the like, and is made of a metal having a substantially L-shaped cross section so as to connect the upper end portions 1a, 1a and the support flange portions 5, 5 to each other. The angle member 7 is incorporated and the opening end side is reinforced. Further, thick reinforcing portions 8 are formed on the outer periphery of the invert portion 2 at two locations in the middle of the longitudinal direction.
[0029]
In addition, the channel member is not limited to one formed from fiber reinforced plastic, but may be any appropriate one such as one formed by processing a metal plate material, one formed from a metal casting, one formed from a normal synthetic resin, etc. Can be adopted. Further, as shown in FIG. 2 (b), a metal extrusion material 7A having a substantially T-shaped cross section is built in and reinforced so as to connect the vertical upper end portion 1a and the horizontal support flange portion 5. Also good. Further, as shown in FIG. 2 (c), the metal mesh material 7 B may be inserted so as to be continuous with the upper end portion 1 a and the support flange portion 5.
[0030]
A predetermined number of the above-described waterway constituent members 1 can be connected in the longitudinal direction to form a waterway. That is, it is necessary in the longitudinal direction by contacting the connecting flange portions 3 and 3 of the waterway constituent members 1 and 1 and fastening the connecting hole 4 with fastening means 9 (FIG. 4) such as a bolt nut or a long bolt and two nuts. It is possible to form a water channel in the pipeline by connecting only a certain length. The new water channel formed in this way can form a water channel with an arbitrary slope set in the pipe line with the changed slope.
[0031]
Next, the support member 10 that supports the water channel constituent member 1 in a suspended state in the pipe will be described with reference to FIGS. 3 is a cross-sectional view showing a support member fixed at a low position in the pipe line, FIG. 4 is a cross-sectional view taken along line AA with a part of FIG. 3 as a side view, and FIG. 5 is a high position in the pipe line. It is sectional drawing which shows the support member fixed. The support member 10 is a horizontal member fixed in a horizontal state in the pipe P, a horizontal beam member 11 formed of a channel member having a substantially U-shaped cross section, and a vertical member suspended from the horizontal beam member. Two suspension shafts 15 and 15 formed of bolts are provided. The suspension shafts 15 and 15 are provided at equal distances from the center of the horizontal beam member, and a screw portion is formed on the outer periphery as a movable portion in the vertical direction.
[0032]
An end plate 11a is welded to both ends in the horizontal direction of the horizontal beam member 11, and is fixed in a substantially horizontal state in the pipe P by a screw jack 12 connected to the end plate. That is, the screw jack 12 includes a base plate 12a, a screw shaft 12b suspended from the base plate, and a clamp 12c screwed to the screw shaft. The screw shaft 12b of the screw jack 12 is inserted into the through hole of the end plate 11a. The clamp 12c is inserted into contact with the end plate 11a, and the horizontal beam 11 is fixed in a horizontal state by rotating the clamp 12c to press the base plate 12a against the wall surface of the pipe P. In addition, four adjustment bolts are screwed into the four corners of the base plate 12a, and the base plate is configured to equally contact with the wall surface at four points.
[0033]
The horizontal beam member 11 and the suspension shaft 15 are connected to each other by inserting the suspension shaft 15 into through holes provided in the upper and lower flange portions of the horizontal beam member and fixing them with double nuts 16 and 17. Actually, in order to increase the vertical movement range corresponding to the gradient of the suspension shaft 15 and connect the suspension shaft 15 stably, the short beam member 13 is connected to the upper side or the lower side of the horizontal beam member 11. If necessary, multiple units are connected and adjusted. That is, as shown in FIG. 3, when the water channel constituent member 1 is fixed at a position corresponding to the lower side of the gradient of the pipe P, two beam members 13 are connected to the lower part of the horizontal beam material 11 to connect the water channel constituent member 1. When the water channel component 1 is supported at a position corresponding to the position above the gradient of the pipe P as shown in FIG. 5, one beam 13 is connected to the upper part of the horizontal beam 11. And the waterway component 1 is installed upwards. Further, as shown in FIG. 5, the horizontal beam member 11 can be fixed further upward by interposing, for example, a metal plate member 14 between the base plate 12a of the screw jack and the wall surface.
[0034]
The support flange portion 5 of the water channel constituent member 1 may be directly supported on the lower ends of the suspension shafts 15, 15, but in this embodiment, the support body 20 along the longitudinal direction of the pipeline is supported by the suspension shaft. The water channel component 1 is fixed to the support. That is, a connecting piece 18 formed of a short channel material is fixed to the lower ends of the suspension shafts 15 and 15 by welding or the like, and a support body 20 made of a channel material having a substantially C-shaped cross section is bolted to the connecting piece. The water channel component 1 is fixed to the support 20 with a thumbscrew 21. As shown in FIG. 7 to be described later, the support 20 is configured by connecting channel members 22 having a length of about 2 m with a connecting plate 23.
[0035]
The channel construction method in the pipe of this embodiment using the channel construction member 1, the support member 10 and the support body 20 configured as described above will be described below with reference to FIGS. 6 is a schematic longitudinal sectional view of a pipe showing each step of the water channel construction method, FIG. 7 is a partially broken plan view of a state where the water channel constituent members are connected and supported with a gradient, and FIG. FIG. In this embodiment, the pipe P is a reinforced concrete fume pipe having an inner diameter of 1650, and the pipe P is a junction pipe through which dirty water and rainwater flow. The pipe P has been aged for a long time since it was buried in the underground G, and a predetermined gradient has not been obtained due to unequal subsidence or the like. Although it flows, when it is only sewage, it is difficult to flow and a new water channel is required in a state where it is easy to stay. The pipe is not limited to a pipe having a circular cross section, and may be a horseshoe or rectangular pipe.
[0036]
When the above-described water channel component 1 is installed in the pipe P to form a new water channel, first, each member having a length of about 1 to 2 m is carried into the sewer pipe from the manhole. Then, as shown in FIG. 6A, the support member 10 is supported and fixed by stretching in a substantially horizontal direction on the inner wall of the pipe P at a right angle to the axial direction of the pipe. The support member 10 is installed along the pipe line P at intervals of 3 m, for example. That is, the horizontal beam member 11 is positioned in a substantially horizontal state at the upper and lower center portions of the pipe, the clamps 12c of the screw jacks 12 at both ends are adjusted, the screw shaft 12b is extended, and the base plate 12a is attached to the wall surface of the pipe P. Press contact. When the unevenness of the wall surface is severe and the state of the cylindrical surface is bad, the adjustment bolts at the four corners of the base plate 12a can be put in and out to match the unevenness of the wall surface. In this way, the horizontal beam member 11 can be fixed to the wall surface without making a hole in the wall surface of the pipeline P, and the pipeline P is not damaged.
[0037]
The suspension shafts 15 and 15 are connected to the horizontal beam member 11 fixed to the wall surface of the pipe P in this way with double nuts 16 and 17 as shown in FIG. The horizontal beam 11 fixed at a high position in the pipe line is arranged such that the short beam 13 is positioned at the upper part, and the horizontal beam 11 fixed at a position below the gradient is the short beam 13. The beam member 13 is bolted so as to come down. 6A, the horizontal beam material may be rotated about the screw shaft 12b of the screw jack 12, and the beam material 13 may be fixed either up or down. Then, the suspension shaft 15 is passed through the through holes of the flange portions of the horizontal beam member 11 and the beam member 13, and the flange portions at the upper and lower ends are fastened with double nuts 16, 17 to fix the suspension shafts 15, 15.
[0038]
The suspension shafts 15 and 15 and the water channel constituent member 1 are fixed via a support body 20 connected in the longitudinal direction as shown in FIG. The support member 20 is formed by connecting a plurality of channel members 22 having a substantially U-shaped cross section having a length of about 2 m, which is easy to insert into manholes, with bolts and nuts via a plurality of connecting plates 23, for example, the distance between the manholes. To match. Two supports 20 are installed in parallel in accordance with the opening end of the waterway component 1 to form two rails. And the two support bodies 20 are connected with the angle 24 (refer FIG. 3) for width stop so that it may have a fixed space | interval mutually. In the water channel component 1, the support flange portion 5 is fixed to these supports 20 with a thumbscrew 21 (see FIG. 3) and supported in a suspended manner, and the connecting holes 4 of the joint flange portions 3 and 3 are sequentially connected by the fastening means 9. Connect with bolts. Even if the pipe P is already installed and the sewage is flowing down, the water channel constituent member 1 can be supported in a suspended manner.As described above, in this step, the water channel constituent member 1 is connected to the pipe P. The water channel constituting member 1 is formed with a bowl-shaped invert portion 2 that opens upward and allows sewage and the like to flow along the longitudinal direction.
[0039]
Next, it moves to the process of giving a gradient to the waterway component 1 supported in this way. In this step, the vertical position of the suspension shaft 15 is adjusted by changing the fixing position of the suspension shaft 15 that is a vertical member of the support member 10 and the horizontal beam member 11. This adjustment is performed by adjusting the double nuts 16 and 17 screwed onto the suspension shaft 15. Since the suspension shaft 15 is adjusted by the two double nuts 16 and 17 separated in the vertical direction by the horizontal beam member 11 and the short beam member 13, the adjustment can be performed continuously and accurately, and after the fixing, the adjusted state Can be prevented, and a lateral shake such that the suspension shaft 15 moves along the longitudinal direction of the horizontal beam member 11 can be prevented.
[0040]
As described above, the water channel constituent member 1 is connected in the pipe P to give a predetermined gradient, and then water is changed (not shown). In the water change, sewage that has been flowing up to now is blocked, the flow is changed to a new water channel constituted by the water channel component 1, and the sewage on the bottom surface of the pipe P is removed. In addition, when performing water change, the upstream waterway constituent member that has already been repaired should be slightly shorter, for example, about 1.85 m, with an interval of about 15 cm between adjacent waterways. If another short water channel component having a length of about 15 cm is inserted into the space and the existing water channel and the new water channel are connected to perform water replacement, the water replacement work can be performed efficiently. Moreover, water change may be performed before giving a gradient to the waterway component 1, and the process may be changed so as to give a gradient after the water change. In the case of an existing pipe line, a water changing step is necessary, but in the case of a new pipe line or a pipe line that is not in service, this water changing step becomes unnecessary.
[0041]
After the water is changed in this way, the water channel constituent member is reset at a predetermined position of the pipe P, and the state where the water channel constituent member 1 is inclined is maintained, as shown in FIG. The waterway component 1 is fixed with concrete C1. Concrete is pumped along the bottom surface of the pipe line P with a transport tube, and the space between the water channel component 1 and the bottom surface of the pipe line P is filled with concrete C1. The filling height is set to a height that is about half the vertical height of the water channel component 1 or a height that is slightly higher or lower, but at least the fastening means 9 such as a lower bolt that connects the joining flange portion 3 is buried. It must have a height, and the water channel constituent member 1 is temporarily fixed in this state. In the illustrated example, the lower four bolts are embedded with concrete C1, and the waterway component 1 is prevented from moving.
[0042]
Thus, after temporarily fixing the waterway component 1, the various members that supported the waterway member 1 are removed as shown in FIG. 6 (e). That is, the two can be easily separated by removing the thumbscrew 21 that fixes the water channel component 1 and the support 20. Even if the fixation with the support 20 is released, the connected waterway constituent member 1 is temporarily fixed to the pipe P with the concrete C1 and therefore does not move. Then, the connecting plate 23 of the support 20 is removed and divided into the original channel material 22 having a length of about 2 m. Further, the screw jacks 12 at both ends of the horizontal beam member 11 are loosened, and the support member 10 is removed from the wall surface of the pipeline P. The support member 10 and the support body 20 composed of the horizontal beam member 11 and the suspension shaft 15 are divided and moved to the next step and can be used again.
[0043]
After that, that is, after the support member 10 is removed, the concrete C2 is poured and fixed to the upper part of the water channel component 1 temporarily fixed as shown in FIG. 6 (f). In the temporary fixing, the water channel constituent member 1 is fixed with concrete C1 halfway, and concrete C2 is further poured onto the upper end of the water channel constituent member 1 so that the upper end surface of the concrete C2 is placed in the central invert portion 2. It is assumed that the inclined surface Ca heads. The upper end portion 1a of the opening of the water channel component 1 is reinforced by an angle member 7, and a ridge protrudes upward from the horizontal support flange portion 5. An inclined surface Ca of the concrete C2 is formed up to the upper end of the ridge. The
[0044]
Since the concrete C2 is fixed so as to surround the horizontal support flange portion 5, and the upper end portion 1a and the support flange portion 5 are reinforced, the separation between the concrete C2 and the water channel component 1 hardly occurs, and the inclined surface Ca Thus, it is possible to stably guide sewage to the water channel formed by the invert unit 2. Moreover, since the upper part of concrete C2 and the waterway component 1 is joined by the thickness above the support flange part 5, it can prevent that a crack generate | occur | produces in concrete C2. Furthermore, since the concrete C1 and C2 and the water channel component 1 are coupled by the fastening means 9 such as a long bolt and two nuts, the coupling strength is high, and separation and separation of both can be prevented.
[0045]
As described above, since the water channel constituent member 1 is connected to the pipe P which is aged and the gradient is not constant, and the new water channel having an arbitrary gradient is configured by the invert portion 2, the sewage and the like are contained in the new water channel. Since it flows stably, sewage does not stay and it can be avoided that odors are generated. In particular, in the case of a merging pipe through which sewage and rainwater flow, the sewage can flow smoothly even when the flow rate is fine and the flow rate is low. In the case of confluence pipes, the flow rate decreases when clear weather continues, causing pollutants in the sewage to accumulate and causing odors, and the accumulated pollutants flow out in the rain and contaminate public water areas. Can be prevented.
[0046]
Further, when it rains in the vicinity and rainwater flows into the pipeline, it flows through the water channel of the invert unit 2 when the rainfall is small, but flows through the invert unit 2 and the inclined surfaces Ca on both sides thereof when the rainfall is large. . When the rainfall is reduced, the sewage flowing along the inclined surface Ca smoothly flows to the invert part 2 and does not stay there, so that no odor is generated from the pipeline.
[0047]
In the above step, the step of fixing the water channel component 1 shown in FIG. 6C to the support 20 may be as shown in FIG. In FIG. 9, four hanging members 25 are separately fixed to the upper portions of both ends of the water channel component member 1 with the thumbscrews 21. The suspension member 25 cuts a channel material having a substantially U-shaped cross section into a length of about 10 cm, chamfers the lower corner portion, and comes into contact with the upper end portion 1 a of the water channel component 1 and the corner of the support flange portion 5. It is configured as follows.
[0048]
By using the suspension member 25, the upper flange of the suspension member 25 can be hooked on the lower flange of the support body 20, and the water channel component member 1 is slid along the support body 20 in this state. It can be carried into the pipeline P. In this way, the water channel component 1 can be carried into the pipe P easily from the manhole. Note that a roller-like rotating body may be attached to the suspension member, and the carry-in may be performed with a light pressing force. Even when the sewage D or the like is flowing through the pipe P, the water channel component 1 can be easily carried in.
[0049]
When the pipe P is curved as shown in the plan view of FIG. 10, when connecting the water channel component 1, the bending piece 30 shown in FIG. 11 is inserted in the middle to match the curved state. . The bending piece 30 has the same cross-sectional shape as the water channel component 1, the left and right joint flange portions 31, 31 connected to the water channel component member 1 are continuous in an inclined state, and the distance between the joint flange portions is left and right The wall is different. A plurality of connection holes 32 are formed in the joint flange portion 31 at predetermined intervals. A new water channel can be formed in accordance with the curved pipe line P by connecting the water channel component 1 with the bent piece 30 interposed therebetween.
[0050]
Next, another embodiment of the waterway constituent member according to the present invention and another embodiment of the waterway constituent method using this waterway constituent member will be described in detail with reference to the drawings. First, a water channel component for configuring a new water channel in the pipe will be described. FIG. 12 shows a water channel component according to the present embodiment, (a) is a plan view with a part broken away, (b) is a front view with part (a) broken, and FIG. 13 (a) is a figure. 12 is a side view of the water channel constituent member, and FIG. 12B is a cross-sectional view taken along line AA of FIG.
[0051]
12 and 13, the water channel component member 41 is continuously raised from the upper end of the invert part toward the outside, and the invert part 42 having a semicircular cross section having a shape in which the cylinder is halved along the axial direction. Inclined flange portions 43, 43, and joining flange portions 44 extending in a right angle direction toward both ends in the longitudinal direction of the invert portion 42 and downward toward both ends in the longitudinal direction of the tilt portion. 44. The invert part 42 is provided with a semicircular part having a diameter of about 50 cm and a parallel part 42a on the upper part thereof. The invert part 42 has a bowl shape with a longitudinal length of about 2 m that can be inserted from a manhole. This is where a small amount of rainwater flows.
[0052]
On the outer periphery of the invert portion 42, thick reinforcing portions 42b are formed at two locations in the longitudinal direction. A plurality of connecting holes 45 are formed at predetermined intervals in the joint flange portions 44, 44 at both ends of the water channel component member 41. The gradient of the inclined portions 43, 43 is preferably about 15% from the outer peripheral portion toward the central portion, and when there is heavy rain, dirty water and rainwater flow through this portion. The water channel constituent member 41 may have an appropriate length of 1 to 2 m as long as it can be inserted from the manhole. The invert portion 42 has a round rod shape with a semicircular cross section, but an appropriate shape such as a square rod shape, a substantially U shape, or a substantially V shape may be used.
[0053]
The water channel constituent member 41 is formed of reinforced plastic (FRP) reinforced with glass fiber or the like, and, for example, six guide holes 46 are formed as guide portions along the longitudinal direction of the invert portion 42 on the lower surfaces of the inclined portions 43 and 43. It is. Three guide holes 46 are arranged side by side below each inclined portion 43, are formed of pipes having an inner diameter of about 20 to 50 mm, and open to the joint flange portions 44 and 44 at both ends. Therefore, when a plurality of water channel constituent members 41 are connected to the connection holes 45 of the joint flange portions 44 and 44 through bolts and nuts, the guide holes 46 are configured to communicate with each other, and a guide wire is inserted into the guide holes 46, for example. Then, the water channel constituent member 41 can be inserted into the pipe line from the manhole. In this example, the outer two guide holes 46A are opened laterally by slits formed in the horizontal direction. Since the water channel component member 41 is formed with guide holes 46 and 46A along the longitudinal direction, the water channel component member 41 has a shape that is difficult to twist and is lightweight.
[0054]
As described above, the water channel component member 41 can be connected by connecting the joint flange portions 44, 44, but the six long bolts 48a and the twelve nuts are sandwiched with the spacer 47 as shown in FIG. It can also connect by the connection means 48 comprised by 48b. The spacer 47 is formed of a synthetic resin plate having a thickness of about 5 to 10 mm, and two leg portions 47a are formed so as to protrude from the main body portion having substantially the same shape as the joint flange portions 44 and 44. A plurality of fold lines 47b are formed on the two leg portions, and the vertical height of the leg portions can be adjusted by cutting at the fold line portions. Since the leg part of the spacer 47 contacts the bottom surface of the pipe P such as a sewer pipe, a desired gradient can be given to the connected water channel constituting member 41. The spacer 47 may be formed of a metal plate material other than the synthetic resin plate material. The spacer 47 has six through holes 47 c formed at the same position as the guide holes 46, and six small diameter through holes 47 d formed at the same position as the connecting holes 45.
[0055]
In addition, it is preferable to insert and connect the packing (not shown) which prevents a water leak to the contact surface of the spacer 47 and the joining flange parts 44 and 44. FIG. Further, the spacer 47 that keeps the distance between the pipe P and the water channel component member 41 brings the joint flange portions 44 and 44 into contact with each other through packing, and is a surface opposite to the contact surface of one joint flange portion 44. And may be fastened together by the connecting means 48 and fixed.
[0056]
Next, a wire support member 50 that supports a guide wire W as a guide means for inserting the water channel constituent member 41 into a pipe P such as a sewer pipe embedded in the underground G will be described with reference to FIG. To do. The wire support member 50 includes a horizontal beam member 51a formed of a channel material having a substantially U-shaped cross section fixed in a horizontal state in the pipe P, and welding or the like upward from the center portion of the horizontal beam member. A frame member 51 having a substantially inverted T-shape composed of a fixed vertical member 51b is provided.
[0057]
An end plate 51c is welded to both end portions of the horizontal beam member 51a and the upper end portion of the vertical member 51b, and the frame member 51 is fixed in the pipe P by three screw jacks 52 connected to the end plate. That is, the screw jack 52 includes a base plate 52a, a screw shaft 52b suspended from the base plate, and a clamp 52c that is screwed to the screw shaft. The screw shaft 52b of the screw jack 52 is inserted into the through hole of the end plate 51c. The clamp 52c is inserted into contact with the end plate 51c, and the frame member 51 is fixed to the pipeline wall surface by rotating the clamp 52c to press the base plate 52a against the wall surface of the pipeline P. Note that four adjustment bolts are screwed into the four corners of the base plate 52a, and the base plate 52a is configured to abut against the wall surface evenly at four points.
[0058]
And the two suspension shafts 53 and 53 formed from a long volt | bolt are provided as a vertical member suspended from this horizontal beam material 51a. The suspension shafts 53 and 53 are provided at equal distances from the center of the horizontal beam member 51a, and a threaded portion is formed on the outer periphery as a movable portion in the vertical direction. A support beam material 54 that supports the guide wire W is connected to the lower ends of the suspension shafts 53 in a horizontal state. By adjusting the suspension shafts 53, 53, the vertical position of the support beam 54 can be adjusted. The ends of the guide wire W are fixed to both ends of the support beam 54. The guide wire W is connected to the support beam member 54 by a hook or the like (not shown), and is stretched in a substantially horizontal state by a tension applying means (not shown) such as a chain block or a turnbuckle.
[0059]
With reference to FIGS. 16 to 18, a method of inserting the waterway constituting member 41 of the present embodiment configured as described above into the pipe P from the manholes H 1 and H 2 and connecting them to form a waterway in the pipe P will be described with reference to FIGS. This will be described below.
[0060]
First, as shown in FIG. 16A, a guide for inserting a plurality of waterway constituent members 41 into a pipe P buried in the underground G so as to communicate between the two manholes H1, H2. The wire support members 50 and 50 for passing the guide wire W are fixed in the pipe line P from the manholes H1 and H2, respectively. That is, as shown in FIG. 15, by operating the screw jacks 52 at the left and right ends and the upper end of the frame member 51 to feed the screw shaft 52b outward, the screw shaft is moved to the wall surface of the pipe P. Abutted and fixed. A support beam material 54 that supports the guide wire W is supported from the frame material 51 so as to be movable up and down by suspension shafts 53 and 53, and the vertical position and horizontal state of the support beam material 54 are adjusted by adjusting the suspension shaft. Adjust.
[0061]
Next, the process proceeds to a step of stretching the guide wire W between the fixed wire support members 50 and 50. Using tension applying means (not shown) such as a chain block or a turnbuckle through the two guide wires W, W between the support beam members 54 of the wire support members 50, 50 fixed in the pipe P. Tension is applied to the guide wires W and W. For example, when using a wire rope made of a twisted wire as the guide wire W, a stainless steel wire rope or iron bar having a diameter of about 10 to 20 mm can be used. For example, a rope having an appropriate diameter may be used. In the wire support member 50, since the inverted T-shaped frame material 51 is supported at three points on the inner wall of the pipe P, the frame material 51 can turn and move even when tension is applied to the guide wires W and W. In addition, the guide wires W and W can be firmly supported.
[0062]
After the guide wires W and W are stretched as described above, the process proceeds to the step of inserting the water channel constituting member 41 into the pipe P along the guide wires W and W as shown in FIG. . In this example, the water channel constituent member 41 is carried in from one side manhole H1, and guide holes 46A and 46A in which slits are formed to open to the side are used, and guide wires W and W are passed through the slits to guide holes 46A and 46A. It inserts in 46A and makes the 1st waterway component 41 the state suspended.
[0063]
The first water channel component member 41 is pushed into the pipe P, and the second water channel component member 41 is supported by the guide wires W and W in the same manner, and the second water channel component member and the first water channel component member are The connecting flange portions 44 and 44 are connected. This connection is performed by connecting means 48 such as a bolt and nut with a spacer 47 interposed between the joining flange portions 44 and 44. As the connecting means 48, as shown in FIG. 14, it is preferable to screw two nuts 48b into one long bolt 48a, but a normal bolt nut may be used. When the water channel constituent member 41 is inserted into the pipe P, the insertion becomes easy if the positions of the guide wires W and W are set high so that the spacer 47 does not contact the bottom surface of the pipe P. In order to prevent the guide wire W from falling off the guide hole 46A, it is preferable to drive a wedge into the slit or insert a pin so as to close the opening of the slit.
[0064]
As shown in FIG. 17 (a), as a step of inserting the water channel component 41 into the pipe P, the partition material S1 is fixed to the downstream manhole H2 and the sewage D1 is dammed, and the sewage D1 has a water channel configuration. The member 41 may be floated and inserted into the pipe P. The water channel constituent member 41 is formed of a resin such as FRP and has a small apparent specific gravity and floats in sewage. Therefore, it can be easily inserted into the pipe P.
[0065]
In this way, a plurality of waterway constituent members 41 are sequentially connected and inserted into the pipe P, and the process is repeated until the other side of the manhole H2 is reached. Since the water channel constituent member 41 is lightweight and has a shape that is not easily twisted, it can be easily inserted into the pipe P. When the pipeline P is an existing pipeline in service, a tip cap (not shown) is attached to the tip of the first water channel component member together with a height adjusting spacer, and the inverted portion 42 of the water channel component member 41 is contaminated with sewage. If it is prevented from entering, work becomes easy.
[0066]
When using the guide holes 46 and 46 in which no slit is formed, one end of the guide wires W and W is removed and passed through the guide holes 46 and 46 of the first water channel component member 41. The second water channel component member 41 is connected to the guide holes 46, 46 in the same manner by connecting means 48 such as bolts and nuts with a spacer 47 between the joint flange portions 44, 44 of the water channel constituent member 41 through the guide wires W, W, and the water channel configuration on the tip side. It inserts in the pipe line P sequentially from a member.
[0067]
The spacer 47 is sandwiched between the two joining flange portions 44 and 44 by adjusting the height of the leg portion 47a so that the connected water channel constituent member 41 has a predetermined gradient. If the gradient of the existing pipe P is not constant due to uneven settlement, the vertical height is set by cutting the height of the leg 47a of the spacer 47 with the broken line 47b in accordance with the unevenness of the pipe measured in advance. If it puts, when all the waterway constituent members 41 are inserted in pipe P, it will become a predetermined gradient and is preferred.Thus, a predetermined gradient can be given to the connected waterway constituent member 41 very easily only by adjusting the height of the leg portion 47a of the spacer 47. In addition,The broken line 47b is not limited to an arc, but may be a straight line.
[0068]
In this way, the water channel constituent member 41 is sequentially connected through the guide wires W and W, and the guide holes 46A and 46A are inserted into the pipe P along the guide wires W and W. FIG. 17B and FIG. 18A show a state where a predetermined number of water channel constituent members 41 are inserted into the pipe P with a desired gradient. When the water channel constituent members 41 are inserted into the pipe P, they are guided and held by the guide wires W, W, so that the flow of rainwater suddenly increases due to heavy rain during the work, and the work is interrupted. Even if it does, the water channel component 41 is not flowed. The adjustment of the vertical height of the leg portion 47a that gives a desired gradient to the water channel constituent members 41 is not limited to folding the folding line 47b, but may be ground to a predetermined height by a grinder or the like. Further, an adjustment screw may be incorporated into the lower end of the leg portion for adjustment.
[0069]
Thereafter, the process proceeds to the water changing step shown in FIG. The partition plate S2 is fixed to the bottom surface of the upstream manhole H1, and the sewage flowing down is dammed to collect the sewage D2. In the case of the process of FIG. 17A, when the partition plate S1 of the manhole H2 on the downstream side is removed, the sewage D1 that has been dammed is drained downstream along the pipe P, and the spacer 47 is connected to the pipe P. The water channel constituent member 41 connected in contact with the bottom surface has a predetermined gradient.
[0070]
A pump 58 is installed in the sewage D2 collected by the partition plate S2, and a drain pipe 58a is connected from the pump and is positioned above the water channel constituent members 41. When the pump 58 is operated, the sewage D2 is sucked up, discharged from the drain pipe 58a onto the water channel constituting member 41, and flows downstream (right side in the figure) due to the gradient. Since water is changed by using the waterway constituent members 41 connected in this way, it is not necessary to install another pipe for water change, the process can be greatly simplified, and the construction period can be greatly shortened. .
[0071]
Since the sewage flows through the invert portions 42 of the connected water channel components 41... By this water changing process, the sewage etc. does not flow on the bottom surface of the pipe P, and this bottom surface can be cleaned. It becomes easy to fix the water channel constituent members 41 with concrete or mortar. In addition, when constructing a water channel in a new pipeline, the water changing step is not performed.
[0072]
Next, the process moves to a step of fixing a plurality of water channel constituent members 41... Inserted into the pipe P and having a gradient to the bottom surface of the pipe P with concrete C1 or mortar. When a concrete pressure feeding pipe is inserted from one manhole H1 side of the pipe P to the manhole H2 side and the pressure feeding pipe is gradually pulled out while injecting the concrete C1, the concrete C1 becomes the bottom surface of the cleaned pipe P and the water channel component. 41... When a large amount of concrete C1 is poured at once, the connected waterway constituent members 41... Move with the momentum of the concrete C1, so that the connecting means 48 of the joining flange portions 44, 44 is small enough to be embedded and fixed. Accordingly, the movement and lifting of the water channel constituent members 41 are prevented by the momentum at the time of injection, and the water channel constituent members 41 are kept at the bottom surface of the pipe P with a desired gradient as shown in FIG. Fixed with a small amount of concrete C1.
[0073]
In addition, when injecting concrete C1, one of the guide holes is formed as a hole (not shown) having an inner diameter of 50 mm or more and a slit opened downward, and a concrete pressure feeding pipe having an outer diameter of less than 50 mm is inserted into this hole. Then, when the pressure feeding pipe is pulled out while flowing the concrete, the injected concrete flows downward from the slit and is surely injected between the water channel constituent member 41 and the bottom surface of the pipe, and the water channel constituent member 41. Displacement due to movement can be prevented.
[0074]
After the concrete C1 is injected, the process proceeds to a step of removing the guide wires W, W supporting the water channel constituent members 41. The water channel constituent members 41... Connected and fixed in the above-described process have the connection means 48 of the joint flange portions 44 and 44 fixed by the concrete C1. Therefore, even if the guide wires W and W are removed, the water channel constituent members 41. There is no movement from a predetermined position. After the guide wires W and W and the wire support member 50 are removed, they can be used again in the next step.
[0075]
In this state, concrete or mortar is poured again, and as shown in FIG. 18 (c), the space below the inclined portions 43, 43 of the water channel constituting member 41 is filled and fixed with concrete C2. By this step, the water channel constituent members 41 are securely fixed to the pipe P. And between the inclined parts 43 and 43 of the waterway component 41 ... and the pipe wall surface is filled with concrete C2, the upper surface of the concrete C2 becomes flat, and a new corresponding to the invert part 42 in the pipe P is obtained. A water channel is formed with the desired slope.
[0076]
In this way, for example, a new water channel can be formed in the existing pipeline P in a state where the gradient has changed due to aging, and the new water channel portion formed by the invert portion 42 is used as sewage. There is no water leakage, no stagnation due to the depression, and the water flows down with a predetermined gradient. When the flow rate increases, the water channel portion formed by the invert portion 42 and the inclined portions 43 and 43 can be used. Furthermore, generation of odor due to retention can be prevented.
[0077]
By constructing a new water channel in the thus-aged pipeline P, the pipeline P is reinforced and can be used for a long time. And since dirty water etc. can be drained stably, it can avoid that an oil ball etc. generate | occur | produce and the maintenance of a public water area is achieved. In addition, when a new water channel is formed by connecting the water channel components 41... In the pipe P, the guide hole 46 communicates along the water channel, so that an optical fiber, other cables, etc. are utilized using this hole. Can be inserted.
[0078]
It should be noted that after the concrete C1 is injected and the water channel constituent members 41 are fixed after a predetermined time has passed, the concrete C2 is filled and fixed before the guide wires W and W are removed, and then the guide wires W and You may make a process go back and forth so that W may be removed. In the above process, the channel configuration of the section between the manholes H1 and H2 has been described, but the channel configuration of the next adjacent section is performed by the same process, and the channel configuration of the predetermined section is sequentially performed to be aged. A new water channel is formed in the pipe P. The waterway constituent member 41 connected to the first section and the waterway constituent member 41 connected to the next section are connected by a different waterway constituent member, or inverted with concrete or mortar in a portion corresponding to a manhole. Form parts and connect.
[0079]
Furthermore, in the above-described process, the example in which the wire support member 50 that stretches the guide wire W that serves as a guide when the water channel component member 41 is inserted into the pipe P is shown. Instead, the guide wires W, W may be stretched as shown in FIG. That is, in FIG. 19, gantry K1 and K2 are installed above manholes H1 and H2, and one gantry K1 is fixed with a winch 55 for winding a guide wire, and both cradles are inserted into two manholes. The shaft 56 is supported. A pulley 57 and a pulley are fixed to the lower end of the vertical shaft 56. In this example, when another manhole H3 exists between the manholes H1 and H2, the guide wire W can be stretched through the intermediate manhole H3.
[0080]
In this example, when the guide wire W is stretched, the winch 55 of one gantry K1 is unwound to extend the guide wire W, the manhole H1 is lowered, and the pulleys 57 and 57 are used to pass through the pipeline P. The manhole H2 is raised and one end of the guide wire W is fixed to the gantry K2. When the winch 55 is wound up, a predetermined tension is applied to the guide wire W, and the guide wire W is stretched in the pipe P.
[0081]
In addition, when several manholes are embed | buried comparatively close, a water channel can be comprised so that several manholes may be continued. For example, when a water channel is continuously formed between three or four manholes, a guide wire is inserted from two manholes at both ends, and a guide wire W is stretched so as to pass through an intermediate manhole. It is possible to insert the water channel constituent members 41... Into the pipe line P continuous between three or four manholes.
[0082]
Further, when injecting the concrete C1, as shown in FIG. 20, the pressing jig 59 is used to insert between the water channel constituent member 41 and the pipe P, and the water channel constituent member is lifted by the pressure of the concrete. It is preferable to prevent it. The pressing jig 59 is fixed to the upper abutting plate 59a that abuts on the upper wall surface of the pipe P, two substantially A-shaped arms 59b that are swingably connected to the upper abutting plate, and the legs of this arm. And four lower abutting plates 59c, which are connected by a necessary length, and are inserted into the pipe P along the support wire SW.
[0083]
In this example, the water channel constituent member 41 is provided with a gradient by keeping a gap between the bottom surface of the broken pipe P and the spacers 47A and 47B. Even when the pipe P is broken in the middle, after repairing the pipe P with mortar or the like, the arm 59b of the pressing jig 59 is swung so that the four lower backing plates 59c are inclined portions of the water channel constituent member 41. Alternatively, the water channel constituent member 41 can be pressed downward by contacting the flange portion and the upper contact plate 59a against the upper wall surface of the pipe P, and the water channel constituent member 41 is lifted when concrete or mortar is poured. , Can prevent moving. Further, although not shown in the drawing, instead of the pressing jig 59, an air bag is inserted between the water channel constituent member and the upper surface of the pipe, and the air channel is inflated by inflating the air channel constituent member. Can also be prevented.
[0084]
Another embodiment of the waterway constituting member according to the present invention will be described in detail with reference to FIG. FIG. 21 shows another embodiment of the waterway constituent member according to the present invention, wherein (a) is a cross-sectional view of the main part, and (b) and (c) are schematic cross-sections in a state of being fixed to a small-diameter and large-diameter pipe, respectively. FIG. In this embodiment, in contrast to the above-described embodiment, the water channel constituent member further includes an auxiliary inclined plate portion continuous with the end portion of the inclined portion. Other substantially equivalent configurations are denoted by the same reference numerals, and detailed description thereof is omitted.
[0085]
In FIG. 21, flexible auxiliary inclined plate portions 43 A and 43 A having flexibility are continuous with the end portions of the inclined portions 43 and 43 that are continuous with the upper end of the invert portion 42 of the water channel component member 41. That is, the auxiliary inclined plate portions 43A and 43A are formed with engaging grooves at the inner ends, and are fitted and fixed to the inclined portions 43 and 43 by the engaging grooves. The auxiliary inclined plate portions 43A and 43A can be cut to an arbitrary width with a scissors or the like as necessary. It is preferable that the auxiliary inclined plate portion 43A and the inner wall surface of the pipe line P are in elastic contact with each other.
[0086]
When the water channel constituent members 41 are connected to the pipe P with a desired gradient by the same water channel construction method as described above, the upstream water channel constituent member 41 has a gap between the inclined portions 43 and 43 and the inner wall surface of the pipe. However, in this embodiment, the auxiliary inclined plate portions 43A and 43A are curved to connect the interval portions, so that the water channel Concrete C2 can be easily filled below the constituent member 41, and there is no step between the inclined portions 43, 43 and the inner wall surface of the pipe P, so that sewage does not stay and the sewage is smooth. It can flow down and does not generate odors.
[0087]
In the case of the small-diameter pipe P1 as shown in FIG. 21 (b), the auxiliary inclined plate portions 43A and 43A are curved and elastically contact the inner wall surface, and as shown in FIG. 21 (c), the large-diameter pipe P2 In this case, the auxiliary inclined plate portions 43A and 43A elastically contact the inner wall surface linearly. Furthermore, in the case of a large-diameter pipe, it is also possible to connect an auxiliary inclined plate portion having a larger width. The auxiliary inclined plate portion is not limited to being fitted and connected to the engaging groove, but may be fixed by an adhesive, or may be connected by screwing or the like.
[0088]
Next, still another embodiment of the waterway constituting member will be described with reference to FIG. The channel constituting member 60 shown in this embodiment is characterized in that a guide portion guided and supported by a guide wire W is formed by a guide hole 65 having a large cross-sectional area, as compared with the above-described embodiment. That is, the guide hole 65 has a triangular prism shape that connects the lower part of the invert part 61 and the outer side of the inclined part 62, has a large cross-sectional area, has a high rigidity and is difficult to twist, and is floated in sewage or the like. It has a shape in which buoyancy acts greatly in the state. And the joining flange part 63 is formed in the outer side of an invert part and an inclination part, and the six connection holes 64 are opened.
[0089]
After inserting this water channel component member 60 along the guide wire W into the pipe P and fixing it with concrete C1, C2, etc., the wall surfaces of the invert portion 61 and the inclined portion 62 constituting the guide hole 65 are removed. Thus, the cross-sectional area of the water channel portion through which sewage or the like flows can be increased, the cross-sectional defect of the water channel when the water channel is configured in the pipe P can be minimized, and the flow rate can be increased.
[0090]
Further, the guide hole 65 has a large cross-sectional area, and when sewage or the like is blocked and the water channel constituent member 60 is floated and inserted into the pipe P, the buoyancy acts so much that the insertion can be easily performed. In the case of this waterway constituent member 60, the width of the invert part of the manhole connecting the waterway constituent members 60 and 60 should be made the same as the width of the guide hole without removing the wall surfaces of the invert part 61 and the inclined part 62. As a result, dirty water or rainwater can be flowed into the guide hole 65, and cross-sectional defects can be reduced.
[0091]
In the above-described embodiment, the example of three guide holes on one side is shown as the guide portion guided by the guide wire, but there are three pairs of guide grooves 46a as shown in FIG. The water channel constituent member 41A or the water channel constituent member 41B having a pair of slits 46b as shown in FIG. 23B may be used, and the number is not limited to three, and may be one or more. In the case of the guide groove or the slit, since the guide wire can be inserted from the opening, it is possible to guide without removing one end of the guide wire when inserting the water channel constituent member into the pipe. Setting the width of the entrance of the guide groove or slit to be slightly smaller than the diameter of the guide wire is preferable because it does not easily come off when fitted.
[0092]
Further, the water channel constituting member shown in FIG. 24 includes a normal water channel constituting member 70 shown in (a) and a shallow water channel constituting member 75 shown in (b). The invert part 71 of the water channel constituent member 70 has a semicircular shape, an inclined part 72 is continuous from the upper end of the invert part 71, and a guide part 73 is formed below the inclined part 72. The invert portion 76 of the water channel component member 75 is formed by an arc having a large opening width and a large curvature radius, an inclined portion 77 is continuous from the upper end of the invert portion 76, and a guide portion 78 is formed on the lower surface thereof. Since the shallow water channel constituent member 75 can be fixed at a low position of the pipe P, the cross-sectional defect of the pipe P can be reduced while maintaining an appropriate gradient.
[0093]
In the above-described embodiment, an example of a support body having a substantially U-shaped cross section as the support body 20 supported in a suspended state by the support member 10 has been shown. Of course, a rectangular support may be used. Further, the width stopper for connecting the two supports is not limited to the angle 24, and one having an appropriate cross-sectional shape may be used.
[0094]
In the step of fixing the water channel constituent member in the pipe line, an example of fixing by temporarily fixing concrete C1 to the middle and main fixing injecting concrete C2 to the upper part is shown. The support may be changed, for example, to the inside of the waterway constituent member, and the concrete may be poured into the upper portion at a time. Alternatively, temporary fixing may be performed with an adhesive or the like, and main fixing may be performed with a filler or concrete.
[0095]
Furthermore, although the thumbscrew 21 is shown as a means for fixing the water channel constituent member 1 to the two rail-shaped supports 20, the present invention is not limited to this, and for example, screws or bolts or other fixings. Means may be used. Although the example in which the support member and the wall surface of the pipe line are press-contacted with a screw jack has been shown, the structure is such that the wall surface is pressed and fixed using a mechanism such as a rack and pinion or an elastic contact mechanism using a spring, for example. May be. Moreover, although the example which adjusts the position of a perpendicular direction with an outer peripheral thread part and a double nut was shown as a movable part of a hanging shaft, you may make it adjust using other mechanisms, such as a worm gear.
[0096]
In addition, the water channel constituent member is not limited to a synthetic resin, and an appropriate member such as one formed by bending a metal plate material can be adopted. The wire support member 50 that supports the guide wire W is not limited to the above-described configuration, and may be any configuration as long as it can support the guide wire in a stretched state. Further, the present invention is not limited to the construction of a water channel in an existing pipeline that has been aged, but can be applied to a construction of a water channel in a new pipeline.
[0097]
In the process of stretching the guide means in the pipeline, an example in which a wire support member is used, and an example in which a guide wire is stretched using a pulley at the lower end of the vertical axis while supporting the vertical axis on the gantry are shown. The temporary frame may be constructed in the field by combining wood in the manhole without using these members and mounts, and a guide wire or the like may be stretched using this temporary frame. There is no limitation on the configuration for stretching.
[0098]
【The invention's effect】
As can be understood from the above description, the waterway construction method in the pipeline of the present invention is:The process can be greatly simplified, and the construction period can be greatly shortened and the cost can be significantly reduced. Also,Even when the pipeline is in service and sewage is flowing down, it is possible to change the water to the connected water channel components with a gradient, so there is no need to install a separate water replacement pipe, and the process It can be greatly simplified and the construction period can be greatly shortened.
[0099]
In addition, the other waterway construction method of the present invention can omit the step of placing the ground concrete, can shorten the work period, can easily support the waterway construction member, and use the support member any number of times. Therefore, cost can be reduced. Furthermore, since the gradient can be set easily and can be set continuously with high accuracy, sewage and the like can be smoothly flowed down, and generation of stagnation and odor can be prevented.
[0100]
Since the water channel component of the present invention is reinforced at the opening end portion and the support flange portion, it is less likely to be damaged, and the construction is facilitated. In addition, when the water channel component is fixed with concrete or the like, a desired concrete thickness can be obtained between the upper end and the support flange portion, so that cracking of the concrete or the like can be prevented and the durability of the water channel component can be improved. .
[0101]
Other waterway construction method of the present invention,Since the spacer whose vertical height is adjusted is fixedly connected to the water channel component member, a desired gradient of the water channel component member can be easily given. Also,A guide means such as a guide wire is stretched between at least two manholes, and the waterway constituent members are sequentially connected along the guide means and inserted into the pipe. Even in the pipeline, a new water channel can be formed in the pipeline.furtherSince the process can be simplified, the water channel can be formed in the pipe line in a short period of time and at a low cost.
[0102]
When connecting the waterway constituent members, fixing the spacer capable of adjusting the height to the joint flange portion and bringing it into contact with the bottom surface of the pipe line can give an arbitrary gradient to the connected waterway constituent members. The fixing of the water channel constituent member to the pipe is first made by fixing the connecting means of the water channel constituent member with a small amount of concrete and the like and then filling the space between the water channel constituent member and the pipe with concrete etc. The water channel constituent member can be stably fixed without moving, and the water channel constituent member can be reliably fixed without being lifted by filling concrete or the like below the water channel constituent member. When the water is changed to the connected waterway constituent member, another pipe for water change or the like becomes unnecessary, the process can be simplified, the member can be saved and the cost can be reduced.
[0103]
Since the other waterway constituent member of the present invention includes an inclined portion continuous with the invert portion, and includes a guide portion on the lower surface of the inclined portion,It can be made light and difficult to twist. Also,It can be inserted into the pipeline along the guide wire stretched between the manholes, and a new water channel can be easily constructed in the pipeline by connecting the joint flange portions.furtherWhen the auxiliary inclined plate portion is made continuous with the end portion of the inclined portion, concrete or mortar can be easily filled below the water channel constituent member, and there is no step between the water channel constituent member and the pipe, and sewage etc. is retained. Can be prevented.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows a channel configuration member used in a channel configuration method according to the present invention, wherein (a) is a plan view, (b) is a front view partly broken, and (c) is partly broken (b). Side view.
2A is an enlarged cross-sectional view of a main part of FIG. 1, and FIGS. 2B and 2C are cross-sectional views of other examples of a reinforcing material, respectively.
FIG. 3 is a cross-sectional view showing a support member fixed at a low position in a pipeline.
4 is a cross-sectional view taken along line AA in which a part of FIG. 3 is a side view.
FIG. 5 is a cross-sectional view showing a support member fixed at a high position in a pipeline.
FIG. 6 is a schematic longitudinal sectional view of a pipe showing each step of the waterway construction method.
FIG. 7 is a partially broken plan view of a state in which waterway constituent members are connected and supported with a gradient.
8 is a partially cutaway side view of FIG.
FIG. 9 is a cross-sectional view showing another example of the process of FIG.
FIG. 10 is a plan view of a curved pipe line.
11A is a plan view of a bending piece used in the conduit of FIG. 10, and FIG. 11B is a schematic perspective view of FIG.
12A and 12B show another embodiment of the waterway component according to the present invention, in which FIG. 12A is a plan view with a part broken away, and FIG. 12B is a front view with a part cut away.
13A is a side view of the water channel component of FIG. 12, and FIG. 13B is a cross-sectional view taken along line AA of FIG.
14A is a front view of a spacer sandwiched between waterway constituent members, and FIG. 14B is a connection state diagram of a main part of the waterway constituent members connected with the spacer of FIG.
FIG. 15 is a cross-sectional view of a pipe line in a state where a support member that supports a guide wire is fixed to the pipe line.
FIGS. 16A and 16B show respective steps of another water channel construction method, in which FIG. 16A is a state in which a guide wire is stretched, and FIG.
FIG. 17 shows each step subsequent to the step of FIG. 16, (a) is another state in which the water channel constituting member is inserted, and (b) is a schematic sectional view of the manhole and the pipe line showing the water changing step.
FIG. 18 is a schematic cross-sectional view of a pipe showing each step of another waterway construction method.
FIG. 19 is a schematic cross-sectional view of a pipe line showing an example of another process for tensioning a guide wire.
20A and 20B show another example of a pre-process for fixing a water channel constituent member with concrete, FIG. 20A is a schematic perspective view of a pressing jig for the water channel constituent member, and FIG. 20B is a schematic cross-sectional view of a pipe channel.
FIG. 21 shows still another embodiment of a waterway component according to the present invention, in which (a) is a cross-sectional view of an essential part, and (b) and (c) are respectively fixed to a small-diameter and a large-diameter pipe. FIG.
22A and 22B show still another embodiment of a water channel component according to the present invention, in which FIG. 22A is a cross-sectional view of the main part, and FIG.
FIGS. 23A and 23B are cross-sectional views showing other examples of guide portions of waterway constituent members, respectively.
FIGS. 24A and 24B are cross-sectional views of pipes showing other examples of waterway constituent members, respectively.
[Explanation of symbols]
1 waterway component, 2 invert section,
3 joint flange, 5 support flange,
7 Angle material (reinforcing material),
10 support member,
11 Horizontal beam material (horizontal member),
15 Suspension shaft (vertical member),
20 support body, 21 thumbscrew,
25 suspension members,
41, 41A, 41B waterway components,
42,61 Invert section,
43, 62 inclined part,
43A Auxiliary inclined plate part,
44, 63 Joint flange,
45, 64 connecting holes,
46, 46A, 65 guide hole (guide part),
46a Guide groove (guide part),
46b Slit (guide part),
47 spacers, 47a legs,
48 connection means, 50 wire support member,
70,75 waterway components,
71,76 Invert section,
72,77 inclined part,
73, 78 guide part,
P pipeline,
W guide wire (guide means),
H1, H2 manhole,
C1 concrete, C2 concrete
Ca inclined surface

Claims

A method of constructing a new waterway in a pipeline buried underground,
In the pipe, connecting a waterway component that forms a bowl-shaped invert portion that opens upward and allows sewage or the like to flow along the longitudinal direction;
Applying a desired gradient to the connected waterway component;
A new water channel is formed by opening a gap in the already repaired upstream water channel, and the upstream water channel and the new water channel are connected to each other by inserting a water channel component into the gap, A process of changing water in which sewage flows through a waterway comprising the upstream waterway and a new waterway;
Fixing the water channel constituent member to the pipe, and a water channel construction method in the pipe.

A method of constructing a new waterway in a pipeline buried underground,
In the pipe, a waterway constituent member formed with a flange-shaped invert portion that opens upward and allows sewage or the like to flow along the longitudinal direction and a support flange portion that extends outward from the invert portion is formed by the support member. A process of supporting the suspension flange in a suspended manner,
Adjusting the vertical position of the water channel component supported by the support member to give a gradient to the water channel component;
Fixing the water channel constituent member to the pipe line with a gradient;
A process for removing the support member, and a waterway construction method in a pipe.

A method of constructing a new waterway in a pipeline buried underground,
A step of supporting the water channel component member formed in the pipe line and forming a bowl-shaped invert portion that can be opened upward and sewage can flow along the longitudinal direction by a support member;
Adjusting the vertical position of the water channel component supported by the support member to give a gradient to the water channel component;
A new water channel is formed by opening a gap in the already repaired upstream water channel, and the upstream water channel and the new water channel are connected to each other by inserting a water channel component into the gap, A process of changing water that causes the sewage in service to flow through a waterway comprising the upstream waterway and a new waterway;
Fixing the water channel constituent member to the pipe line with a gradient;
A process for removing the support member, and a waterway construction method in a pipe.

The support member supports the water channel constituent member on the left and right sides of the invert part by two left and right suspension shafts having movable parts installed at predetermined intervals along the longitudinal direction of the pipe line,
Adjusting the vertical position of the waterway component by moving the two left and right suspension shafts for each waterway component;
The waterway constituent construction method in a pipe line according to claim 2 or 3, wherein a predetermined gradient is given to the whole waterway constituent member.

The water channel component member fixes a suspension member to a support flange portion, hooks the suspension member to the support member, supports the water channel component member suspended along the pipe line, and the water channel component member. The water channel construction method in a pipe line according to any one of claims 2 to 4, wherein the supporting body to be supported is a rail-like continuous member.

A method of constructing a new waterway in a pipeline buried underground,
A step of connecting a waterway component member, which is open upward and has a bowl-shaped invert portion in which sewage and the like can flow along the longitudinal direction, supported by a support member; and the connected waterway Providing the component with a desired gradient, and fixing the water channel component with the gradient in the pipeline,
The water channel component member is temporarily fixed by injecting concrete or mortar to a height that can prevent movement of the water channel component member between the pipe channel and the water channel component member, and after removing the support member, A method for constructing a water channel in a pipe, characterized in that concrete or mortar is injected and fixed to the upper part of the water channel component.

A method of constructing a new waterway in a pipeline buried underground,
A step of fixing and connecting a spacer having a vertical height between the waterway constituent members that are open upward and that form a bowl-shaped invert portion through which sewage and the like can flow along the longitudinal direction, and the connected And a step of fixing a water channel constituent member to the pipe by bringing a spacer into contact with the bottom surface of the pipe.

A method of constructing a new waterway in a pipeline buried underground,
Into the manhole, a step of carrying in a water channel component member formed with a bowl-shaped invert portion that opens upward and allows sewage or the like to flow along the longitudinal direction, and a spacer that can adjust the vertical height,
Fixing and connecting the water channel constituent member in a manhole with the spacer interposed therebetween, and sequentially inserting the water channel constituent member into the pipe line while adjusting the vertical height with the spacer;
And a step of fixing the water channel constituent member to the pipe line by bringing the spacer into contact with the bottom surface of the pipe line.

A method of constructing a new waterway in a pipeline buried underground,
A step of fixing and connecting a spacer having an adjusted vertical height to a waterway constituent member formed with a bowl-shaped invert portion that opens upward and through which sewage and the like can flow along the longitudinal direction; and A process of fixing the water channel constituent member to the pipeline in contact with the bottom surface of the pipeline,
The step of fixing and connecting a spacer to the water channel constituent member is performed by extending a guide means in the pipe, and hanging the water channel constituent member in the guide means, and then the water channel constituent member is connected to the pipe. A waterway construction method in a pipeline characterized by being fixed to a channel.

A method of constructing a new waterway in a pipeline buried underground,
Between the upstream manhole and the downstream manhole, a guide means whose end is supported by the upstream manhole and the downstream manhole is stretched and opened upward in one manhole along the longitudinal direction. Sequentially carry in the waterway constituent member formed with a bowl-shaped invert portion through which sewage and the like can flow, align the waterway constituent member along the guide means, and sequentially connect the waterway constituent member in a suspended state into the pipeline. A water channel construction method in a pipe, wherein the guide means is removed after inserting and fixing the water channel constituting member to the pipe.

As a pre-process of the process of fixing the water channel constituent member to the pipeline,
The water channel configuration in a pipe line according to any one of claims 2, 6 to 10, further comprising a step of water replacement for flowing sewage in service to the water channel component member provided with a gradient or connected thereto. Construction method.

A waterway component that constitutes a new waterway in a pipeline buried in the ground,
There are joint flange portions extending at right angles toward the outside at both ends in the longitudinal direction of the invert portion constituting the water channel through which the sewage flows, and slightly outward and slightly outward from the opening end portion above the invert portion. A waterway constituent member characterized in that a support flange portion extending toward the joint flange portion is continuously formed along the opening end portion to reinforce the opening end portion and the support flange portion. .

A waterway component that constitutes a new waterway in a pipeline buried in the ground,
Form a bowl-shaped invert part that opens upward and flows sewage along the longitudinal direction,
A joint flange portion extending at a right angle toward the outside at both ends in the longitudinal direction of the invert portion;
Forming an inclined part that rises outward from the upper end of the invert part and continues,
A water channel constituent member, characterized in that a guide portion is formed on a lower surface of the inclined portion or the joint flange portion to be supported by guide means extending in a pipe line that supports the water channel constituent member.

A waterway component that constitutes a new waterway in a pipeline buried in the ground,
Form a bowl-shaped invert part that opens upward and flows sewage along the longitudinal direction,
A joint flange portion extending at a right angle toward the outside at both ends in the longitudinal direction of the invert portion;
Forming an inclined part that rises outward from the upper end of the invert part and continues,
Forming a guide portion to be supported by guide means for supporting the water channel constituent member on the lower surface of the inclined portion or the joining flange portion;
The water channel component member further includes an auxiliary inclined plate portion having flexibility that is continuous with an end portion of the inclined portion.