JP4132995B2 - Rehabilitation method of sewage pipes including concrete public fences - Google Patents

Rehabilitation method of sewage pipes including concrete public fences Download PDF

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JP4132995B2
JP4132995B2 JP2002161952A JP2002161952A JP4132995B2 JP 4132995 B2 JP4132995 B2 JP 4132995B2 JP 2002161952 A JP2002161952 A JP 2002161952A JP 2002161952 A JP2002161952 A JP 2002161952A JP 4132995 B2 JP4132995 B2 JP 4132995B2
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pipe
public
downstream
rehabilitation
fence
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JP2002161952A
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JP2004011127A (en
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正 田中
良夫 金子
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、民間下水を埋設公共下水に流入させる場合に、民間下水と公共下水との境界線近傍に設置される、コンクリート製公共桝を含む下水管路の更生工法に関する。
【0002】
【従来の技術】
従来、公共下水道が敷設されている地域には、民間下水と公共下水との境界近傍に公共桝が設置されている。古くから公共下水道が敷設されている地域では、この公共桝は、一般に、コンクリート製円筒状の桝本体に対向する両側面に流入口及び流出口が開口され、それぞれの開口部に上流側及び下流側下水管が接続されている。
【0003】
このようなコンクリート製公共桝は、長期間使用すると、地盤の振動等により、各接続部や公共桝の下水管取り付け部が剥離を起こし、これら接続部から下水の漏洩や雨水等の浸入という不具合が起こってしまう。従って、これらの不具合を解決するために、接続部をモルタルで補修したり、老朽化した公共桝を新しいものに取り換えることで対応している。
【0004】
しかしながら、モルタルで補修する方法では、確実に止水できないという問題があった。また、既設のコンクリート製公共桝を新しいものと取り替える場合は、施工費用が高くなるという問題があった。
【0005】
このような問題点を解決する方法として、特開平7−3863号公報にて、筒状の桝本体、この桝本体に形成された底板、および桝に接続されている下水管の管底と上記底板の上面とが略同一レベルになるように、一端が前記桝本体に固着され、かつ他端が既設下流管に接続される流出管を備えた更生桝を用いて、既設のコンクリート桝を更生する方法が開示されている。
【0006】
又、特開平7−34521号公報にて、既設コンクリート桝の上流、下流方向に対応する開口部を有し、下流管と桝とを接続する接続継手が備えられた更生桝を用いて、既設のコンクリート桝を更生する方法が開示されている。
【0007】
更に、特開2001−182144号公報に、既設桝のインバート部に載置されるインバートと、補修桝と上流側及び補修桝と下流側の下水管とを繋ぐ流入流出口と、立ち上がり管とを備えた補修桝で、公共桝の補修が容易でかつ立ち上がり管から補修桝内を点検清掃できる補修桝が開示されている。
【0008】
一方、老朽化して更新を要する時期になったコンクリート製公共桝には、通常、コンクリート管や陶管が下水管として使用されている場合が多く、従って、公共桝の更新時には、同時に下水管も老朽化している場合が多いため、これを同時に補修等する必要がある。
【0009】
【発明が解決しようとする課題】
しかしながら、上述の更生桝又は補修桝では、いずれの桝においても、老朽化したコンクリート製公共桝を掘削することなく更生可能ではあるが、既設の下水道管を同時に補修し、補修された下水道管を接続して更生管路となすことに対する配慮はなされておらず、老朽化した下水管が接続されている場合の公共桝を含む下水管路自体を更生する目的への適用は、事実上不可能であるという問題点があった。
【0010】
本発明は、上記従来の更生桝が有する問題点を解決し、簡単かつ確実に、老朽化した下水道管が接続されている、コンクリート製公共桝を含む下水管路の更生方法を提供する目的でなされたものである。
【0011】
【課題を解決するための手段】
上記課題を解決するための本発明の請求項1記載のコンクリート製公共桝桝を含む下水管路の更生工法(以下、発明1という)は、既設のコンクリート製公共桝の流出口と接続されている下流側の下水管の内面を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、この新設公共桝の流入側接続部と前記上流側の下水管の端部との間を媒介継手を介して接続し、一方、新設公共桝の流出側接続部と前記下流側の下水管のライニング材との間を、一端が軸方向に摺動可能なやりとり継手を介して接続し、つぎに、新設公共桝の周りに土砂を埋め戻すことを特徴とするコンクリート製公共桝を含む下水管路の更生工法である。
【0012】
本発明の請求項2記載のコンクリート製公共桝を含む下水管路の更生工法(以下、発明2という)は、既設のコンクリート製公共桝の流出口と接続されている下流側の下水管の内面を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、この新設公共桝の流出側接続部と前記下流側の下水管のライニング材とを接続し、一方、新設公共桝のゴム輪接合でやりとり接続可能とされた流入側接続部と前記上流側の下水管との間を継手を介して接続し、つぎに、新設公共桝の周りに土砂を埋め戻すことを特徴とするコンクリート製公共桝を含む下水管路の更生工法である。
【0013】
(作用)
従って、以上いずれの発明においても、下流側の下水管の内面を予めライニング材でライニングして補修し、補修された下水管先端の内周の樹脂部が露出されて、そこに継手受け口が被嵌して固定され、更生桝と上流側下水管又は下流側下水管とはやりとりで接続されるので、簡単かつ確実に、下水管及び公共桝が同時に更生されるコンクリート製公共桝を含む下水管路の更生工法となるのである。
【0014】
【発明の実施の形態】
つぎに、図面を参照して、本発明のコンクリート製公共桝を含む下水管路の更生工法を説明する。図1は発明1の更生工法が適用されてコンクリート製公共桝を含む下水管路が更生された一例を示す説明断面図である。
以下、工事手順に沿って本発明の更生工法を説明する。
【0015】
まず、更生を要するコンクリート製公共桝8の下流側の下水管7内に筒状のライニング材である樹脂管71をライニング(内面被覆)して既設下水管7の内面を補修する。樹脂管71を下水管7の内面にライニングする方法は特に限定されないが、例えば一例として、コンクリート製公共桝8側から、例えば加熱により膨径する塩化ビニル樹脂管等の合成樹脂管71を下流側の下水管7内に装入し、道路下に埋設されている公共下水道管(図示せず)に到達したら、例えば高温水蒸気等を合成樹脂管71内に吹き込んで加熱し、これを膨径させて下水管7内に密着させる方法などが挙げられる。
【0016】
加熱により膨径する合成樹脂管71としては、合成樹脂管71を製造する際に、賦形金型通過直後のパリソンをTg以下に急冷しつつ引き抜き、その外径を小さくしたのちこれを軸方向に沿って折り畳み、円形断面が一方向に凹んだ円形(Ω字形状)としてリール等に巻き取った合成樹脂管等が挙げられる。
【0017】
樹脂管71により下流側の下水管7の内面補修が完了したのち、コンクリート製公共桝8の周囲を地上から掘削し、コンクリート底床板81以外の全てのマンホール壁、上部床板、マンホール蓋を取り除く。次いで、コンクリート製マンホール8に接続されていた上流側の下水管6と、内面が樹脂ライニングされた下流側の下水管7とはそれぞれ切断されてその端部が掘削穴中に突出した状態とされる。
【0018】
上流側の下水管6の切断端部は、泥等を拭い去って清浄とされ、下流側の下水管7の端部はその外周管が切除されて内部の樹脂管71が露出され、樹脂管71の外周面が平滑に研磨された後、溶剤等で拭かれて清浄にされる。
【0019】
上記樹脂管71に、両端部が管受け口11、12とされた第1の管継手1の一方の管受け口11が、接着剤を介して接続され固定される。つぎに、第1の管継手1の他方の管受け口12に、第2の管継手2の管差し口21が接着剤を介して挿入されて固定される。第2の管継手2の他端部はゴム輪方式の管受け口22とされ、その内部に第1の短管23が軸方向に摺動可能に収納されている。第1の短管23の先端はやりとりされて更生桝5の流出側の管受け口52と接着接続される様になっている。即ち、第2の管継手2のゴム輪方式の管受け口22内に、第1の短管の一端が挿入されて、軸方向に摺動可能になされている管継手が、本発明1の「やりとり継手」である。
【0020】
掘削穴底面に残した、撤去されたコンクリート公共桝底床板81の上に、塩化ビニル樹脂等の合成樹脂からなる三方継手タイプの更生桝5を配置する。この更生桝5の上流側側面及び下流側側面には、それぞれ上流側の下水管6及び下流側の下水管7に接続するための流入口及び流出口が設けられ、それぞれは流入側管受け口51及び流出側管受け口52とされている。更生桝5はその上面に立ち上がり管が設けられ、立ち上がり管の上端部に蓋が着脱自在に装着されて点検口53とされている。この点検口53を利用して、更生桝5内の点検や掃除を行えるようになっている。更生桝5の底部には脚54が設けられ、必要があればアンカーボルト等(図示せず)でコンクリート底床板81に固定可能とされている。
【0021】
更生桝5の流入側管受け口51には、第3の管継手3の管差し口31が接着接続されている。第3の管継手3の他端は、上流側下水管6が挿入される管受け口32とされ、いわゆる異種管同士を接続する媒介継手とされている。
【0022】
まず、更生桝5の流入側管受け口51に第3の管継手3の管差し口31を接着接続する。そして、第3の管継手3の管受け口32を上流側の下水管6の端部と接続する。その際、下水管6の端部外面と管受け口32の内面との隙間にシール材(図示せず)を充填する。そして、更生桝5の流入側管受け口51及び流出側管受け口52の管軸が、正しく上流側下水管6及び下流側下水管7の管軸方向となるように更生桝5を配置する。
【0023】
この管継手3の管受け口32の代わりに、更生桝5の流入側管受け口51の先端が直接上流側下水管に被嵌するようにされていても良い。その時は、更生桝を移動しつつその流入側管受け口51を上流側下水管6に装入し、確実に接続が確認されたら、その位置に配置して固定されれば良い。
【0024】
続いて、第2の管継手2の管受け口22内に挿入されている第1の短管23を更生桝5側に摺動させて引き出し、更生桝5の流出側管受け口52とやりとりしつつ接着接続する。
【0025】
なお、この場合、更生桝5の流入側管受け口51および流出側管受け口52を接着タイプのTS受け口としたが、第2の管継手2の管受け口22と同様に、ゴム輪方式の受け口とすることも可能である。
管継手3として、更生桝5の流入側管受け口51内に摺動可能に収納されているものを使用する場合では、上流側下水管6と更生桝5、及び下流側下水管7と更生桝5とは、どちらから先に接続されても良い。
【0026】
このようにして、上流側下水管6と下流側下水管7とは更生桝5を介して接続され、更生桝5と上流側下水管6とは媒介継手を介して、また、更生桝5と下流側下水管7とは一端が軸方向に摺動可能なやりとり継手を介して接続される。
【0027】
以上のように下水管が更生されたら、更生桝5の周りに所定高さ(立ち上がり管の上端よりも少し下側の位置)のところまで土砂を埋め戻して突き固める。つぎに、この突き固めた土砂の上に、更生桝5の立ち上がり管を取り巻くようにリング状の座台(図示せず)を設置し、この座台の上に、上端部外周に鉄蓋付きの鉄枠が嵌合された胴パイプ(図示せず)を載置する。そして、この胴パイプの周りに土砂を埋め戻し、必要に応じて舗装等を施せば、コンクリート製公共桝を含む下水管路の更生工事が完了する。
【0028】
図2は発明2の更生工法が適用されてコンクリート製公共桝を含む下水管路が更生された一例を示す説明断面図である。本例は、コンクリート製公共桝の上流側下水管と下流側下水管のそれぞれの管軸が落差を有している場合である。
以下、工事手順に沿って本発明の更生工法を説明する。
【0029】
まず、上記図1の場合と同様に、更生を要するコンクリート製公共桝8の下流側の下水管7内に筒状のライニング材である樹脂管71をライニング(内面被覆)して既設下水管7の内面を補修する。
【0030】
樹脂管71により下流側の下水管7の内面補修が完了したのち、コンクリート製公共桝8の周囲を地上から掘削し、コンクリート底床板81以外の全てのマンホール壁、上部床板、マンホール蓋を取り除く。次いで、コンクリート製マンホール8に接続されていた上流側の下水管6と、内面が樹脂ライニングされた下流側の下水管7とはそれぞれ切断されてその端部が掘削穴中に突出した状態とされる。
【0031】
上流側の下水管6の切断端部は、泥等を拭い去って清浄とされ、下流側の下水管7の端部はその外周管が切除されて内部の樹脂管71が露出され、樹脂管71の外周面が平滑に研磨された後、溶剤等で拭かれて清浄にされる。この露出されている樹脂管71は、更生桝5の流出側の管受け口52と接着接続される。
【0032】
コンクリート公共桝底床板81の上に、塩化ビニル樹脂等の合成樹脂からなる三方継手タイプの更生桝5を配置する。この更生桝5の上流側側面及び下流側側面には、流入側管受け口51及び流出側管受け口52が設けられている。なお、この場合、流入側管受け口51はゴム輪方式の受け口とされており、しかも、その奥部内周には係止段部は設けられていない。更生桝5はその上端面に蓋が着脱自在に装着されて点検口53とされ、この点検口53を利用して、更生桝5内の点検や掃除を行えるようになっている。
【0033】
更生桝5の流入側管受け口51はゴム輪方式の受け口とされており、且つ受け口奥部内周には係止段部が設けられていないので、第4の管継手4の管差し口41が更生桝5の本体内部まで摺動挿入可能であり、よって、上流側下水管6とやりとり接続されている。第4の管継手4の他端は、上流側下水管6が挿入される管受け口42とされている。なお、この管継手4は、上流側下水管の管径に合わせた管受け口42とされ、管差し口41が更生桝5の流入側管受け口51に挿入可能な口径とされていれば良い。
【0034】
まず、更生桝5の管受け口52を、露出している樹脂管71と接着接続する。なお、その際、更生桝5の流入側のゴム輪方式の管受け口51内に、第4の管継手4の管差し口41を更生桝5本体内部まで摺動挿入しておく。更生桝5の流出側の管受け口52と樹脂管71とを接着固定したのち、更生桝5の流入側の管受け口51内に挿入されている第4の管継手4の管差し口41を上流側下水管6側に摺動させて引き出し、その管受け口42を上流側下水管6の端部と接続する。その際、下水管6の端部外面と管受け口42の内面との隙間にシール材を填する。
【0035】
このようにして、上流側下水管6と下流側下水管7とは、更生桝5を介して接続され、更生桝5と上流側下水管6とは継手を介してやりとり接続され、更生桝5と下流側下水管7とは直接接続される。
【0036】
以上のように下水管が更生されたら、上記図1の場合と同様に、更生桝5の周りに所定高さ(立ち上がり管の上端よりも少し下側の位置)のところまで土砂を埋め戻して突き固める。つぎに、この突き固めた土砂の上に、更生桝5の立ち上がり管を取り巻くようにリング状の座台を設置し、この座台の上に、上端部外周に鉄蓋付きの鉄枠が嵌合された胴パイプを載置する。そして、この胴パイプの周りに土砂を埋め戻し、必要に応じて舗装等を施すことで、コンクリート製公共桝を含む下水管路の更生工事が完了する。
【0037】
【発明の効果】
請求項1記載の本発明の更生工法は、まず既設のコンクリート製公共桝の流出口と接続されている下流側の下水管を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、この新設公共桝の流入側接続部と前記上流側の下水管の端部との間を媒介継手を介して接続し、一方、新設公共桝の流出側接続部と前記下流側の下水管のライニング材との間を、一端が軸方向に摺動可能なやりとり継手を介して接続したので、簡単かつ確実に、老朽化した下水管が接続された、コンクリート製公共桝を含む下水管路の更生工法となるのである。
【0038】
請求項2記載の本発明の更生工法は、まず既設のコンクリート製公共桝の流出口と接続されている下流側の下水管の内面を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、この新設公共桝の流出側接続部と前記下流側の下水管のライニング材とを接続し、一方、新設公共桝のゴム輪接合でやりとり接続可能とされた流入側接続部と、前記上流側の下水管との間を継手を介して接続したので、簡単かつ確実に、老朽化した下水管が接続された、コンクリート製公共桝を含む下水管路の更生工法となるのである。
【図面の簡単な説明】
【図1】本発明の更生工法が適用されてコンクリート製公共桝を含む下水管路が更生された一例を示す説明断面図である。
【図2】本発明の更生工法が適用されてコンクリート製公共桝を含む下水管路が更生された他の一例を示す説明断面図である。
【符号の説明】
1 第1の管継手
11 管受け口
12 管受け口
2 第2の管継手
21 管差し口
22 管受け口
23 第1の短管
3 第3の管継手
31 管差し口
32 管受け口
4 第4の管継手
41 管差し口
42 管受け口
5 更生桝
51 流入側管受け口
52 流出側管受け口
53 点検口
54 脚
6 上流側下水管
7 下流側下水管
71 樹脂管
8 コンクリート製マンホール
81 底床板
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rehabilitation method for a sewage pipe including a concrete public dredger that is installed in the vicinity of a boundary line between private sewage and public sewage when private sewage flows into buried public sewage.
[0002]
[Prior art]
Conventionally, public dredging has been installed near the boundary between private sewage and public sewage in areas where public sewerage is laid. In areas where public sewers have been laid for a long time, this public dredging generally has an inlet and an outlet on both sides facing the concrete cylindrical dredger body, and upstream and downstream in each opening. Side sewer pipe is connected.
[0003]
When such concrete public fences are used for a long period of time, due to the vibration of the ground, etc., each connection part and the sewer pipe installation part of the public fences will be peeled off. Will happen. Therefore, in order to solve these problems, the connecting part is repaired with mortar, or an old public fence is replaced with a new one.
[0004]
However, the method of repairing with mortar has a problem that water cannot be reliably stopped. In addition, when replacing an existing concrete public fence with a new one, there is a problem that the construction cost becomes high.
[0005]
As a method for solving such a problem, in Japanese Patent Application Laid-Open No. 7-3863, a tubular bowl body, a bottom plate formed on the bowl body, a bottom of a sewer pipe connected to the bowl, and the above-mentioned Rehabilitating an existing concrete fence using a rehabilitation fence having an outflow pipe with one end fixed to the main body and the other end connected to the existing downstream pipe so that the upper surface of the bottom plate is substantially at the same level. A method is disclosed.
[0006]
Further, in Japanese Patent Application Laid-Open No. 7-34521, a rehabilitated slab having openings corresponding to the upstream and downstream directions of an existing concrete slag and having a connecting joint for connecting the downstream pipe and slag is used. A method of rehabilitating a concrete slag is disclosed.
[0007]
Furthermore, Japanese Patent Application Laid-Open No. 2001-182144 discloses an invert mounted on an invert portion of an existing dredge, an inflow / outlet port connecting a repair rod and an upstream side, and a repair rod and a downstream sewer pipe, and a rising pipe. A repair rod that is easy to repair public fences and that can be inspected and cleaned from the riser pipe is disclosed.
[0008]
On the other hand, concrete pipes made of concrete that have become aging and need to be renewed usually have concrete pipes and ceramic pipes used as sewage pipes. Since many of them are old, it is necessary to repair them at the same time.
[0009]
[Problems to be solved by the invention]
However, in the above-mentioned rehabilitation dredging or repair dredging, any dredging can be rehabilitated without excavating an aged concrete public dredging, but the existing sewer pipe is repaired at the same time, and the repaired sewer pipe No consideration has been given to connecting to rehabilitation pipes, and it is virtually impossible to apply to the purpose of rehabilitating sewer pipes, including public dredging, when aging sewer pipes are connected. There was a problem that.
[0010]
An object of the present invention is to solve the problems of the above-mentioned conventional rehabilitation bottles, and to provide a method for rehabilitating sewage pipes including concrete public pits, to which aged sewer pipes are connected easily and reliably. It was made.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the rehabilitation method for a sewer pipe including a concrete public fence according to claim 1 of the present invention (hereinafter referred to as invention 1) is connected to an outlet of an existing concrete public fence. The inner surface of the downstream sewage pipe is coated with a cylindrical lining material, and then the existing public pit is removed by cutting around the concrete public pit and the ends of the upstream and downstream sewage pipes. And the lining material at the end of the downstream sewage pipe is exposed, and a new resin public fence is installed instead of the existing public fence. The end of the upstream sewer pipe is connected via a mediation joint, while the end of the new public basin is connected to the downstream lining material of the downstream sewer pipe in the axial direction. connected via a slidable exchange coupling, then, Around 設公 co Masuichi a rehabilitation method of the sewage pipe including a concrete public basins, characterized in that backfill soil.
[0012]
According to claim 2 of the present invention, a method for rehabilitation of a sewer pipe including a concrete public basin (hereinafter referred to as invention 2) is an inner surface of a downstream sewage pipe connected to an outlet of an existing concrete public basin. Is covered with a cylindrical lining material, and then the existing public fence is removed by cutting around the concrete public fence, and the ends of the upstream and downstream sewage pipes are cut, and the downstream The lining material at the end of the side sewer pipe is exposed, and a new resin public pit is installed instead of the existing public pit, and the lining material for the outflow side connection part of the new public pit and the downstream sewage pipe On the other hand, the inflow side connection portion that can be exchanged by rubber ring bonding of the new public fence and the upstream sewage pipe are connected via a joint. Co characterized by backfilling earth and sand around A rehabilitation method of the sewage pipe including a cleat made public basins.
[0013]
(Function)
Therefore, in any of the above inventions, the inner surface of the downstream sewage pipe is repaired by lining in advance with a lining material, and the repaired inner resin portion at the end of the sewage pipe is exposed, and the joint receiving port is covered there. The sewer pipe including the concrete public pit where the sewage pipe and the public basin are rehabilitated at the same time because the rehabilitation tub and the upstream sewage pipe or the downstream sewage pipe are connected by exchange. This is a road rehabilitation method.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, referring to the drawings, a method for rehabilitating a sewage pipe including a concrete public fence according to the present invention will be described. FIG. 1 is an explanatory cross-sectional view showing an example in which the rehabilitation method of the invention 1 is applied to rehabilitate a sewer pipe including a concrete public fence.
Hereinafter, the rehabilitation method of the present invention will be described along the construction procedure.
[0015]
First, the inner surface of the existing sewage pipe 7 is repaired by lining (inner surface coating) a resin pipe 71 that is a cylindrical lining material in the sewage pipe 7 on the downstream side of the concrete public pit 8 requiring rehabilitation. The method of lining the resin pipe 71 on the inner surface of the sewage pipe 7 is not particularly limited. For example, as an example, the synthetic resin pipe 71 such as a vinyl chloride resin pipe that expands by heating from the concrete public fence 8 side is provided downstream. Is inserted into the sewage pipe 7 and reaches a public sewer pipe (not shown) buried under the road, for example, high temperature steam is blown into the synthetic resin pipe 71 and heated to expand the diameter. For example, a method of closely contacting the inside of the sewer pipe 7 may be used.
[0016]
As the synthetic resin pipe 71 swelled by heating, when the synthetic resin pipe 71 is manufactured, the parison immediately after passing through the shaping mold is pulled out while rapidly cooling to Tg or less, and the outer diameter is reduced and then the axial direction is set. And a synthetic resin tube wound around a reel or the like as a circular shape (Ω-shaped) with a circular cross section recessed in one direction.
[0017]
After the inner surface repair of the downstream sewage pipe 7 is completed by the resin pipe 71, the periphery of the concrete public fence 8 is excavated from the ground, and all the manhole walls, the upper floor board and the manhole cover other than the concrete bottom floor board 81 are removed. Next, the upstream side sewage pipe 6 connected to the concrete manhole 8 and the downstream side sewage pipe 7 whose inner surface is resin-lined are respectively cut so that their end portions protrude into the excavation hole. The
[0018]
The cut end portion of the upstream sewage pipe 6 is cleaned by wiping off mud and the like, and the outer end pipe of the end portion of the downstream sewage pipe 7 is cut away to expose the internal resin pipe 71. After the outer peripheral surface of 71 is polished smoothly, it is cleaned with a solvent or the like.
[0019]
One pipe receiving port 11 of the first pipe joint 1 whose both ends are tube receiving ports 11 and 12 is connected and fixed to the resin pipe 71 via an adhesive. Next, the pipe inlet 21 of the second pipe joint 2 is inserted and fixed to the other pipe receiving opening 12 of the first pipe joint 1 with an adhesive. The other end of the second pipe joint 2 is a rubber ring-type pipe receiving port 22 in which a first short pipe 23 is accommodated so as to be slidable in the axial direction. The tip of the first short tube 23 is exchanged and is adhesively connected to the tube receiving port 52 on the outflow side of the rehabilitation basket 5. That is, the pipe joint in which one end of the first short pipe is inserted into the rubber ring type pipe receiving port 22 of the second pipe joint 2 and is slidable in the axial direction is “ "Interaction joint".
[0020]
A three-way joint type rehabilitation cage 5 made of a synthetic resin such as a vinyl chloride resin is disposed on the removed concrete public fence bottom floor plate 81 left on the bottom of the excavation hole. The upstream side surface and the downstream side surface of the rehabilitation bottle 5 are provided with an inlet and an outlet for connecting to the upstream sewage pipe 6 and the downstream sewage pipe 7, respectively. And an outflow side pipe receiving port 52. The rehabilitation basket 5 is provided with a rising tube on the upper surface, and a lid is detachably attached to the upper end of the rising tube to serve as an inspection port 53. By using this inspection port 53, the inside of the rehabilitation basket 5 can be inspected and cleaned. Legs 54 are provided at the bottom of the rehabilitation basket 5, and can be fixed to the concrete bottom floor board 81 with anchor bolts (not shown) if necessary.
[0021]
The pipe insertion port 31 of the third pipe joint 3 is adhesively connected to the inflow side pipe receiving port 51 of the rehabilitation basket 5. The other end of the third pipe joint 3 is a pipe receiving port 32 into which the upstream sewage pipe 6 is inserted, and is a mediating joint that connects so-called different kinds of pipes.
[0022]
First, the pipe insertion port 31 of the third pipe joint 3 is adhesively connected to the inflow side pipe receiving port 51 of the rehabilitation basket 5. Then, the pipe receiving port 32 of the third pipe joint 3 is connected to the end of the upstream sewage pipe 6. At that time, a sealing material (not shown) is filled in the gap between the outer surface of the end portion of the sewer pipe 6 and the inner surface of the pipe receiving port 32. Then, the rehabilitation bottle 5 is arranged so that the tube axes of the inflow side pipe receiving port 51 and the outflow side pipe receiving port 52 of the rehabilitation bottle 5 are correctly in the axial direction of the upstream sewage pipe 6 and the downstream sewage pipe 7.
[0023]
Instead of the pipe receiving port 32 of the pipe joint 3, the tip of the inflow side pipe receiving port 51 of the rehabilitation bottle 5 may be directly fitted to the upstream side sewer pipe. At that time, while moving the rehabilitation tub, the inflow side pipe receiving port 51 is inserted into the upstream side sewage pipe 6, and if the connection is confirmed securely, it may be arranged and fixed at that position.
[0024]
Subsequently, the first short pipe 23 inserted in the pipe receiving port 22 of the second pipe joint 2 is slid and pulled out toward the rehabilitation tub 5 side, and interacts with the outflow side pipe receiving port 52 of the retreading shed 5. Adhesive connection.
[0025]
In this case, the inflow side pipe receiving port 51 and the outflow side tube receiving port 52 of the rehabilitation bottle 5 are adhesive type TS receiving ports. However, like the tube receiving port 22 of the second pipe joint 2, the rubber ring type receiving port and It is also possible to do.
In the case of using the pipe joint 3 that is slidably accommodated in the inflow side pipe receiving port 51 of the rehabilitation bottle 5, the upstream side sewer pipe 6 and the rehabilitation pipe 5, and the downstream side sewer pipe 7 and the rehabilitation pipe. 5 may be connected first.
[0026]
In this way, the upstream sewage pipe 6 and the downstream sewage pipe 7 are connected via the rehabilitation bottle 5, and the rehabilitation pipe 5 and the upstream sewage pipe 6 are connected via the intermediate joint, One end of the downstream sewage pipe 7 is connected via an exchange joint that can slide in the axial direction .
[0027]
When the sewage pipe is rehabilitated as described above, the earth and sand are backfilled to a predetermined height (position slightly below the upper end of the rising pipe) around the rehabilitation basin 5 and hardened. Next, a ring-shaped pedestal (not shown) is installed on the crushed earth and sand so as to surround the rising pipe of the rehabilitation cage 5, and an iron lid is provided on the outer periphery of the upper end portion on the pedestal. A trunk pipe (not shown) fitted with a steel frame is placed. Then, if the earth and sand are backfilled around the trunk pipe and paved as necessary, the rehabilitation work of the sewer pipe including the concrete public fence is completed.
[0028]
FIG. 2 is an explanatory cross-sectional view showing an example in which the rehabilitation method of the invention 2 is applied and a sewer pipe including a concrete public fence is rehabilitated. This example is a case where the pipe shafts of the upstream sewer pipe and the downstream sewer pipe of the concrete public fence have a drop.
Hereinafter, the rehabilitation method of the present invention will be described along the construction procedure.
[0029]
First, as in the case of FIG. 1 described above, a resin pipe 71, which is a cylindrical lining material, is lined (inner surface covered) in a sewage pipe 7 on the downstream side of a concrete public pit 8 requiring rehabilitation, and the existing sewage pipe 7. Repair the inside.
[0030]
After the inner surface repair of the downstream sewage pipe 7 is completed by the resin pipe 71, the periphery of the concrete public fence 8 is excavated from the ground, and all the manhole walls, the upper floor board and the manhole cover other than the concrete bottom floor board 81 are removed. Next, the upstream side sewage pipe 6 connected to the concrete manhole 8 and the downstream side sewage pipe 7 whose inner surface is resin-lined are respectively cut so that their end portions protrude into the excavation hole. The
[0031]
The cut end portion of the upstream sewage pipe 6 is cleaned by wiping off mud and the like, and the outer end pipe of the end portion of the downstream sewage pipe 7 is cut away to expose the internal resin pipe 71. After the outer peripheral surface of 71 is polished smoothly, it is cleaned with a solvent or the like. The exposed resin pipe 71 is adhesively connected to the pipe receiving port 52 on the outflow side of the rehabilitation bottle 5.
[0032]
A three-way joint type rehabilitation cage 5 made of synthetic resin such as vinyl chloride resin is disposed on the concrete public fence bottom floor plate 81. An inflow side pipe receiving port 51 and an outflow side tube receiving port 52 are provided on the upstream side surface and the downstream side surface of the rehabilitation bottle 5. In this case, the inflow side pipe receiving port 51 is a rubber ring type receiving port, and no locking step portion is provided on the inner periphery of the inner portion. The rehabilitation bottle 5 has a lid detachably attached to its upper end surface to form an inspection port 53, and the inspection port 53 can be used to inspect and clean the rehabilitation bottle 5.
[0033]
The inflow side pipe receiving port 51 of the rehabilitation bottle 5 is a rubber ring type receiving port , and no locking step is provided in the inner periphery of the receiving port , so that the pipe insertion port 41 of the fourth pipe joint 4 is provided. It can be slid into the main body of the rehabilitation bottle 5 and is thus connected to the upstream sewage pipe 6 . The other end of the fourth pipe joint 4 is a pipe receiving port 42 into which the upstream sewage pipe 6 is inserted. In addition, this pipe joint 4 is made into the pipe receptacle 42 matched with the pipe diameter of the upstream sewage pipe, and the pipe inlet 41 should just be made into the diameter which can be inserted in the inflow side pipe receptacle 51 of the retreaded tub 5.
[0034]
First, the pipe receiving port 52 of the rehabilitation basket 5 is adhesively connected to the exposed resin pipe 71. At that time, the pipe insertion port 41 of the fourth pipe joint 4 is slid and inserted into the inside of the main body of the rehabilitation rod 5 in the rubber ring type tube receiving port 51 on the inflow side of the rehabilitation rod 5 . After the pipe receiving port 52 on the outflow side of the rehabilitation bottle 5 and the resin pipe 71 are bonded and fixed, the pipe insertion port 41 of the fourth pipe joint 4 inserted into the pipe receiving port 51 on the inflow side of the rehabilitation bottle 5 is upstream. The side sewage pipe 6 is slid and pulled out, and the pipe receiving port 42 is connected to the end of the upstream side sewage pipe 6. At that time, a sealing material is filled in the gap between the outer surface of the end of the sewer pipe 6 and the inner surface of the pipe receiving port 42.
[0035]
In this way, the upstream sewage pipe 6 and the downstream sewage pipe 7 are connected via the rehabilitation bottle 5, and the rehabilitation pipe 5 and the upstream sewage pipe 6 are exchanged and connected via the joint. And the downstream sewer pipe 7 are directly connected.
[0036]
When the sewage pipe is rehabilitated as described above, the earth and sand are backfilled to a predetermined height (position slightly below the upper end of the rising pipe) around the rehabilitation tub 5 as in the case of FIG. Ramify. Next, a ring-shaped pedestal is installed on the crushed earth and sand so as to surround the riser pipe of the rehabilitation cage 5, and an iron frame with an iron lid is fitted on the outer periphery of the upper end. Place the combined barrel pipe. And the rehabilitation work of the sewage pipe line including the concrete public fence is completed by backfilling the earth and sand around the trunk pipe and paveing as necessary.
[0037]
【The invention's effect】
According to the rehabilitation method of the present invention as set forth in claim 1, first, the downstream sewer pipe connected to the outlet of the existing concrete public fence is covered with a cylindrical lining material, and then the concrete public fence is used. The existing public pit is removed by cutting around the edge, cutting the ends of the upstream and downstream sewage pipes, and exposing the lining material at the end of the downstream sewage pipe. Instead of installing a new plastic public pit, connect the inflow side connection part of this new public pit and the end of the upstream sewer pipe through an intermediate joint, Since one end is connected between the outflow side connection part and the lining material of the downstream side sewer pipe through an exchange joint that can slide in the axial direction , an aged sewer pipe can be connected easily and reliably. Rehabilitation work of sewage pipes including concrete public fences By it becomes that.
[0038]
In the rehabilitation method of the present invention as set forth in claim 2, first , the inner surface of the downstream sewage pipe connected to the outlet of the existing concrete public pit is coated with a cylindrical lining material, and then the concrete made Cut around the public dredging to remove the existing public dredging, cut the end of the upstream and downstream sewer pipes, and expose the lining material at the end of the downstream sewer pipe, In place of the public fence, a new plastic public fence is installed, and the outflow side connection part of the new public fence is connected to the lining material of the downstream sewer pipe. Since the inflow side connection portion that can be connected and the upstream sewage pipe are connected via a joint , a concrete public fence with an aged sewage pipe connected easily and reliably is included. It becomes the rehabilitation method of the sewer pipe
[Brief description of the drawings]
FIG. 1 is an explanatory cross-sectional view showing an example in which a sewage pipe including a concrete public fence is rehabilitated by applying the rehabilitation method of the present invention.
FIG. 2 is an explanatory cross-sectional view showing another example in which the rehabilitation method of the present invention is applied to rehabilitate a sewer pipe including a concrete public fence.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st pipe coupling 11 Pipe receiving port 12 Pipe receiving port 2 2nd pipe coupling 21 Pipe insertion port 22 Pipe receiving port 23 1st short pipe 3 3rd pipe coupling 31 Pipe insertion port 32 Pipe receiving port 4 4th pipe coupling 41 Pipe insertion opening 42 Pipe receiving opening 5 Rehabilitation pot 51 Inflow side pipe receiving opening 52 Outflow side pipe receiving opening 53 Inspection opening 54 Leg 6 Upstream sewage pipe 7 Downstream sewage pipe 71 Resin pipe 8 Concrete manhole 81 Bottom floor board

Claims (2)

既設のコンクリート製公共桝の流出口と接続されている下流側の下水管の内面を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、
上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、
前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、
この新設公共桝の流入側接続部と前記上流側の下水管の端部との間を、媒介継手を介して接続し、
一方、新設公共桝の流出側接続部と前記下流側の下水管のライニング材との間を、一端が軸方向に摺動可能なやりとり継手を介して接続し、
つぎに、新設公共桝の周りに土砂を埋め戻すことを特徴とするコンクリート製公共桝を含む下水管路の更生工法。
After covering the inner surface of the downstream sewage pipe connected to the outlet of the existing concrete public fence with a cylindrical lining material, the existing public fence is removed by cutting around the concrete public fence And
Cutting the ends of the upstream and downstream sewage pipes, and exposing the lining material at the end of the downstream sewage pipes;
In place of the existing public fence, a new resin public fence is installed,
Connect the inflow side connection part of this new public pit and the end part of the sewage pipe on the upstream side via a mediating joint,
On the other hand, between the outflow side connection part of the new public pit and the lining material of the downstream sewage pipe , one end is connected via an exchange joint slidable in the axial direction ,
Next, a rehabilitation method for sewage pipes including concrete public fences, characterized in that earth and sand are backfilled around the new public fences.
既設のコンクリート製公共桝の流出口と接続されている下流側の下水管の内面を筒状のライニング材にて内面被覆したのち、前記コンクリート製公共桝の周りを開削して既設公共桝を撤去するとともに、
上流側および下流側の下水管の端部を切断し、かつ、下流側の下水管の端部のライニング材を露出させ、
前記既設公共桝の代わりに新規の樹脂製公共桝を設置し、
この新設公共桝の流出側接続部と前記下流側の下水管のライニング材とを接続し、
一方、新設公共桝のゴム輪接合でやりとり接続可能とされた流入側接続部と、前記上流側の下水管との間を継手を介して接続し、
つぎに、新設公共桝の周りに土砂を埋め戻すことを特徴とするコンクリート製公共桝を含む下水管路の更生工法。
After covering the inner surface of the downstream sewage pipe connected to the outlet of the existing concrete public fence with a cylindrical lining material, the existing public fence is removed by cutting around the concrete public fence And
Cutting the ends of the upstream and downstream sewage pipes, and exposing the lining material at the end of the downstream sewage pipes;
In place of the existing public fence, a new resin public fence is installed,
Connect the outflow side connection part of this new public pit and the lining material of the downstream sewer pipe,
On the other hand, an inflow side connection portion that can be exchanged and connected with a rubber ring joint of a new public fence and the upstream sewage pipe are connected via a joint,
Next, a rehabilitation method for sewage pipes including concrete public fences, characterized in that earth and sand are backfilled around the new public fences.
JP2002161952A 2002-06-03 2002-06-03 Rehabilitation method of sewage pipes including concrete public fences Expired - Fee Related JP4132995B2 (en)

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