JP2007303535A - Method for regenerating pipeline - Google Patents

Method for regenerating pipeline Download PDF

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Publication number
JP2007303535A
JP2007303535A JP2006131806A JP2006131806A JP2007303535A JP 2007303535 A JP2007303535 A JP 2007303535A JP 2006131806 A JP2006131806 A JP 2006131806A JP 2006131806 A JP2006131806 A JP 2006131806A JP 2007303535 A JP2007303535 A JP 2007303535A
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pipe
rehabilitation
existing
drain pipe
cylindrical
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Masamichi Saito
斉藤昌道
Shunei Shiraishi
白石俊英
Shuichi Okamoto
岡本修一
Koichi Ibuka
井深晃一
Takefumi Shindo
新藤竹文
Eiji Owaki
大脇英司
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Taisei Corp
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Taisei Corp
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Priority to JP2006131806A priority Critical patent/JP2007303535A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for regenerating not only an existing pipe having small diameter but also an existing pipe having large diameter economically. <P>SOLUTION: A temporary water drain pipe having smaller outside diameter than inside diameter of an existing pipeline is installed in the existing pipeline. A cylindrical pipe to be regenerated having smaller outside diameter than inside diameter of the existing pipeline and larger inside diameter than outside diameter of the temporary water drain pipe is installed at the outer periphery of the temporary water drain pipe as a single unit. The pipe to be regenerated as the single unit is pressurized and moved in the direction of the pipeline inside the existing pipeline to pressurize the single units sequentially and form a continuous body of pipes to be regenerated. A grout material is poured between the outer periphery of the continuous body and the inner periphery of the existing pipe and is hardened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、管路の更生方法に関するものであり、例えば劣化した下水道を更生する方法に関するものである。
The present invention relates to a method for rehabilitating a pipeline, for example, a method for rehabilitating a deteriorated sewer.

従来の管路の更生方法としては次のような方法が開発されている。
<1> 熱や光などで硬化する樹脂を含浸させた袋状のライニング材を、既設のマンホールから既設管内に挿入する。その際に水圧や空気圧を利用して袋体を反転させながら挿入し、既設管の内面に圧着させ、そのまま硬化させて新たな管体を形成する方法。(反転工法)
<2> 樹脂を含浸させたライナーや硬化樹脂の連続パイプを、既設マンホールから既設管内に引き込み、水圧や空気圧によって膨張させて既設管の内面に圧着させる。その状態のまま温水、蒸気、光などで圧着硬化、または冷却硬化させることで新たな管を構成する方法。(形成工法)
<3> 既設管内に帯状などのライニング材を嵌合させながら製管してゆき、既設管と構築した製管との隙間にモルタルなどを充填して新たな管体を構成する方法。(製管工法)
<4> 工場で製作した二次製品を更生材に使用する工法であり、既設管よりも小さな管径で製作した新管を挿入し、隙間に充填材を充填することで新たな管を構成する方法。(鞘管工法)

特開2001−173085号公報。
The following methods have been developed as conventional methods for rehabilitating pipelines.
<1> A bag-like lining material impregnated with a resin that is cured by heat or light is inserted into an existing pipe from an existing manhole. At that time, a method of forming a new tube body by inserting the bag body while reversing it using water pressure or air pressure, press-bonding it to the inner surface of the existing tube, and curing it as it is. (Inversion method)
<2> A resin-impregnated liner or a continuous pipe made of cured resin is drawn into the existing pipe from the existing manhole and is expanded by water pressure or air pressure to be crimped to the inner surface of the existing pipe. A method of constructing a new tube by pressure-curing or cooling-curing with hot water, steam, light or the like in that state. (Forming method)
<3> A method of forming a new tubular body by forming a pipe while fitting a lining material such as a belt in an existing pipe and filling a gap between the existing pipe and the constructed pipe with mortar or the like. (Pipe making method)
<4> This is a method of using secondary products manufactured at the factory as rehabilitation materials, and a new pipe is constructed by inserting a new pipe manufactured with a smaller pipe diameter than the existing pipe and filling the gap with a filler. how to. (Sheath tube method)

JP 2001-173085 A.

前記した従来の管路の更生方法にあっては、特に直径が1500mm程度の大きい既設管を更生する場合には次のような問題点がある。
<1> 反転工法や形成工法は、元来小口径、中口径の既設管の更生を対象とした技術である。したがって口径が大きくなると、水圧や空気圧を発生させるための設備が大きくなる。さらに温水を利用する工法ではライニング材を拡張するために利用した注入水をボイラーを介して循環させ熱供給を行う必要があり、熱の供給システムも大容量のものが必要となる。したがってこれらの工法は、施工設備的に限界があり、施工延長も限られている。
<2> また反転工法や形成工法は、口径が大きくなればなるほど、拡張に必要な発生内圧が高くなるので、ライナー自体の強度を高める必要があり、材料の品質や経済面からも限界がある。
<3> 製管工法では、既設管内でライニングを形成してゆく必要性から、変形量を大きく取れる材料や形状が使用される。したがって口径が大きくなるほど、材料の自重によるライニング材上部のたわみや、裏込め充填時の充填圧力による管体内側への膨れを生じやすく、それを防止するための支保工が大量に必要となり、施工性や経済性の面から限界がある。
<4> 鞘管工法では、管体の挿入を下水管のマンホール部から行う制約から、長さが1m程度の管体を継ぎ足しながら連続的に挿入してゆく必要がある。したがって仕上がった挿入管には1mごとに継手部が発生し、延長が長くなればなるほど弱点である継手の数が増し、下水の外部への漏水の可能性が考えられる。
<5> いずれの工法においても、既設管の劣化程度により更生管の仕様を変更することが困難であるため、実際の施工過剰な仕様、または過小な仕様となってしまう可能性があり、経済性に問題がある。
The above-described conventional pipe rehabilitation method has the following problems especially when rehabilitating a large existing pipe having a diameter of about 1500 mm.
<1> The reversal method and the forming method are technologies originally intended for rehabilitation of existing pipes with small and medium diameters. Therefore, as the diameter increases, the equipment for generating water pressure and air pressure increases. Furthermore, in the construction method using hot water, it is necessary to circulate the injected water used to expand the lining material through a boiler to supply heat, and the heat supply system must have a large capacity. Therefore, these methods are limited in terms of construction equipment and construction extension is also limited.
<2> The reversal method and the forming method have a higher internal pressure required for expansion as the diameter becomes larger. Therefore, it is necessary to increase the strength of the liner itself, and there is a limit in terms of material quality and economy. .
<3> In the pipe making method, a material or shape that can take a large amount of deformation is used because it is necessary to form a lining in an existing pipe. Therefore, the larger the diameter, the more likely the deflection of the upper part of the lining material due to the weight of the material and the swelling to the inside of the pipe body due to the filling pressure during backfilling, which requires a lot of support work to prevent this. There is a limit from the aspect of property and economy.
<4> In the sheath tube method, it is necessary to continuously insert a tubular body having a length of about 1 m from the restriction that the tubular body is inserted from the manhole portion of the sewage pipe. Accordingly, a joint portion is generated every 1 m in the finished insertion pipe, and the longer the extension is, the more the number of joints that are weak points increases, and the possibility of water leakage to the outside of the sewage is considered.
<5> In any construction method, it is difficult to change the specifications of rehabilitated pipes due to the degree of deterioration of existing pipes. There is a problem with sex.

上記のような課題を解決するために、本発明は、既設の管路内に、既設の管路の内径よりも外径の小さい仮排水管を設置し、この仮排水管の外周に、円筒であって、既設の管路の内径よりも外径が小さく、かつ仮排水管の外径よりも内径の大きい更生管の単体を設置し、更生管の単体を、既設管路の内部で管路方向に加圧して移動させ、順次単体を加圧して更生管の連続体を形成し、この連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う、管路の更生方法を特徴としたものである。
また本発明は上記の更生方法において、更生管はハーフプレキャスト版で構成し、更生管の内部に配置したトラスの一部を外表面から突出させ、この突出したトラスにPC鋼線を挿入して、このPC鋼線を緊張することにより、更生管の移動を行い、かつその後の更生管の連続体の緊張を行い、PC鋼線を含んで、更生管の連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う管路の更生方法を特徴としたものである。
また本発明は、上記の更生方法において、仮排水管の外周に、更生管の単体を設置する場合に、仮排水管の一部を切断した後に、更生管を設置し、更生管の設置後に再度、仮排水管の切断部分を接続して行う管路の更生方法を特徴としたものである。
また本発明は、仮排水管の外周に、更生管の単体を設置する場合に、仮排水管の外周に、円筒を中心軸方向に分割した分割型枠を配置し、分割型枠を接続することによって、仮排水管の外周に円筒状に円筒型枠を配置し、この円筒型枠の外面と既設管の内面との間の空間に、円筒型枠の外周に巻きつける状態で鋼線を配置し、円筒型枠を、既設管路の内部で管路方向に加圧して移動させ、順次、円筒型枠を加圧して円筒型枠の連続体を形成し、この連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う管路の更生方法を特徴としたものである。
In order to solve the above-described problems, the present invention provides a temporary drain pipe having an outer diameter smaller than the inner diameter of an existing pipe line in an existing pipe line, and a cylinder is formed on the outer periphery of the temporary drain pipe. In this case, a single rehabilitation pipe having an outer diameter smaller than the inner diameter of the existing pipe line and having a larger inner diameter than that of the temporary drain pipe is installed, and the single rehabilitation pipe is piped inside the existing pipe line. Pressurize and move in the direction of the road, sequentially pressurize the single body to form a continuous body of rehabilitation pipe, and inject and cure the grout material between the outer periphery of this continuous body and the inner periphery of the existing pipe, It features the method of rehabilitating pipelines.
In the rehabilitation method described above, the rehabilitation pipe is constituted by a half precast plate, a part of the truss arranged inside the rehabilitation pipe is projected from the outer surface, and a PC steel wire is inserted into the projected truss. The tension of the PC steel wire is used to move the rehabilitation pipe, and then the tension of the rehabilitation pipe continuum, including the PC steel wire, the outer circumference of the rehabilitation pipe continuum, and the existing pipe It is characterized by a pipeline rehabilitation method in which a grout material is injected between the inner circumferences and cured.
In addition, in the above rehabilitation method, the present invention provides a method for installing a single rehabilitation pipe on the outer periphery of the temporary drain pipe, after cutting a part of the temporary drain pipe, installing the rehabilitation pipe, and after installing the rehabilitation pipe. Again, it is characterized by a method of rehabilitating the pipeline by connecting the cut portions of the temporary drain pipe.
Moreover, this invention arrange | positions the division | segmentation formwork which divided | segmented the cylinder into the central axis direction on the outer periphery of a temporary drainage pipe, and connects a division | segmentation formwork, when installing the single-piece | unit of a renovation pipe | tube in the outer periphery of a temporary drainage pipe. Thus, a cylindrical frame is arranged in a cylindrical shape on the outer periphery of the temporary drain pipe, and a steel wire is wound around the outer periphery of the cylindrical frame in a space between the outer surface of the cylindrical frame and the inner surface of the existing pipe. The cylindrical frame is pressed and moved in the pipeline direction inside the existing pipeline, and the cylindrical frame is sequentially pressed to form a continuous body of the cylindrical frame, and the outer periphery of the continuous body, It is characterized by a pipeline rehabilitation method in which a grout material is injected between the inner circumferences of existing pipes and cured.

本発明の管路の更生方法は以上説明したようになるから次のような効果を得ることができる。
<1> 小口径の既設管の更生だけでなく、大口径の既設管の更生も経済的に行うことができる。
<2> 温水や圧縮空気、圧力水などの製造が不要であり、施工場所を選ばずに行うことができる。
<3> 継手部分を強力な圧力で突き合わせるから、継手が弱点とならず、漏水の可能性がない。
Since the pipe rehabilitation method of the present invention is as described above, the following effects can be obtained.
<1> Rehabilitation of existing pipes with a large diameter as well as rehabilitation of existing pipes with a large diameter can be performed economically.
<2> Manufacture of hot water, compressed air, pressure water, etc. is unnecessary, and can be performed without selecting a construction site.
<3> Since the joint part is abutted with a strong pressure, the joint does not become a weak point and there is no possibility of water leakage.

以下図面を参照にしながら本発明の好適な実施の形態を、施工順序に従って詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail according to a construction order with reference to the drawings.

<1> 仮排水管1の設置。
本工法は、上流側と下流側の2箇所にマンホールA、Bが配置されている場合にその間の既設管2を更生する方法である。
まず上流側のマンホールAから仮排水管1用のホースを挿入する。
このホースは例えばフレキシブルパイプのような、可撓性のある材料で形成する。
この仮排水管1の外径は、既設の管路の内径よりも小さいパイプである。
既設管2の一部を止水壁21によって堰きとめ、止水壁21よりの上流の水を仮排水管1内に導入し、仮排水管1の下流端から下流に向けて放出する。
この下流端の放出部は、下流側のマンホールBよりもさらに下流側の位置に設置する。
<1> Installation of the temporary drain pipe 1.
This construction method is a method of rehabilitating the existing pipe 2 between the manholes A and B in two locations on the upstream side and the downstream side.
First, the hose for the temporary drain pipe 1 is inserted from the upstream manhole A.
The hose is formed of a flexible material such as a flexible pipe.
The outer diameter of the temporary drain pipe 1 is a pipe smaller than the inner diameter of the existing pipe line.
A part of the existing pipe 2 is dammed by the water stop wall 21, and water upstream from the water stop wall 21 is introduced into the temporary drain pipe 1 and discharged from the downstream end of the temporary drain pipe 1 toward the downstream.
The discharge part at the downstream end is installed at a position further downstream than the manhole B on the downstream side.

<2>更生管3単体の設置。
次に下流側のマンホールBから更生管3の単体を吊り下ろして、仮排水管1の外周に配置する。(図4)
更生管3は、既設の管路の内径よりも外径が小さく、かつ仮排水管1の外径よりも内径の大きい円筒である。
<2> Installation of rehabilitation pipe 3 alone.
Next, the single unit of the rehabilitation pipe 3 is suspended from the manhole B on the downstream side, and disposed on the outer periphery of the temporary drain pipe 1. (Fig. 4)
The rehabilitation pipe 3 is a cylinder having an outer diameter smaller than the inner diameter of the existing pipe line and a larger inner diameter than the outer diameter of the temporary drain pipe 1.

<3>更生管3の構造。
この更生管3は、ハーフプレキャスト版で構成し、更生管3の内部に配置したトラス筋31の一部を外表面から突出させたものである。(図2,3)
この外部に突出したトラス筋31にPC鋼線を通して、更生管3の移動時のガイドとして使用する。
さらにトラス筋31を通したPC鋼線は複数の更生管3を配置した後には、プレストレスを導入して更生管3群の強力な一体化に供する。
更生管3の内面は、粗度係数の向上と、内部に配置した鋼材の保護の目的で樹脂ライニングを施す。
例えばポリウエアを塗布して抵抗の少ない仕上げ面とする。
更生管3自体は、モルタルやコンクリートのようなセメント系材料や、塩ビ、FRPなどの樹脂系材料によって構成する。
セメント系材料を使用する場合には、耐硫酸セメントを使用すると耐久性が向上する。
樹脂系材料を使用する場合には、更生管3の内面のライニング層を省略することも可能である。
更生管3には、その頂部にエア抜き、かつグラウト材の充填状態を確認する確認口32を開口する。
更生管3の底部にはグラウト材の注入口を開口してある。
特に最先端の更生管3には、仮排水管1を容易に更生管3内に取り込めるように傾斜した斜路を取り付けておく。
<3> Structure of the rehabilitation pipe 3.
This rehabilitation pipe 3 is constituted by a half precast plate, and a part of the truss bar 31 arranged inside the rehabilitation pipe 3 is projected from the outer surface. (Figures 2 and 3)
A PC steel wire is passed through the truss bar 31 projecting to the outside and used as a guide when the rehabilitation pipe 3 is moved.
Further, after arranging the plurality of rehabilitated pipes 3, the PC steel wire that has passed through the truss bars 31 introduces pre-stress to provide a strong integration of the rehabilitated pipes 3 group.
The inner surface of the rehabilitating pipe 3 is resin-lined for the purpose of improving the roughness coefficient and protecting the steel material disposed inside.
For example, a polyware is applied to make a finished surface with less resistance.
The rehabilitation pipe 3 itself is composed of a cement-based material such as mortar or concrete, or a resin-based material such as vinyl chloride or FRP.
When a cement-based material is used, durability is improved by using sulfuric acid-resistant cement.
When a resin material is used, the lining layer on the inner surface of the rehabilitated pipe 3 can be omitted.
The rehabilitation pipe 3 is opened at the top with a confirmation port 32 for bleeding air and confirming the filling state of the grout material.
A grout injection port is opened at the bottom of the rehabilitation pipe 3.
In particular, an inclined ramp is attached to the latest rehabilitation pipe 3 so that the temporary drain pipe 1 can be easily taken into the rehabilitation pipe 3.

<4>仮排水管1の切り離しと接続。
下流側のマンホールBから更生管3の単体を吊り下ろして、仮排水管1の外周に配置する場合に、仮排水管1がそのままでは、円筒状の更生管3の単体を仮排水管1の外周に配置できない。
そこで、あらかじめ仮排水管1には切り離し可能な接続部11を設けておき、接続部11の上流側には止水栓12を設けておく。
そして更生管3の吊り下げの直前に、仮排水管1をその接続部11で切り離し、下流側を移動して吊り下げ空間を確保してから更生管3を設置する。
更生管3を設置したら、すぐに仮排水管1を再度、接続部11において接続し、止水栓12を開放して仮排水管1を通して排水を再開する。
<4> Disconnecting and connecting the temporary drain pipe 1.
When the single unit of the rehabilitation pipe 3 is suspended from the manhole B on the downstream side and disposed on the outer periphery of the temporary drainage pipe 1, the single unit of the cylindrical rehabilitation pipe 3 is left as it is in the temporary drainage pipe 1. Cannot be placed on the periphery.
Therefore, a detachable connection portion 11 is provided in advance in the temporary drain pipe 1, and a stop cock 12 is provided on the upstream side of the connection portion 11.
Then, immediately before the rehabilitation pipe 3 is suspended, the temporary drain pipe 1 is disconnected at the connecting portion 11, and the rehabilitation pipe 3 is installed after moving downstream to secure a suspension space.
As soon as the rehabilitation pipe 3 is installed, the temporary drain pipe 1 is connected again at the connecting portion 11, the stop cock 12 is opened, and drainage is resumed through the temporary drain pipe 1.

<5>更生管3の移動。
更生管3の単体を、既設管2路の内部で管路方向に上流側に向けて加圧して移動させる。
そのために、上流側には固定枠4を配置し、下流側には移動枠41を配置する。
両枠の間をPC鋼線42で連結し、各枠ともセンターホールジャッキを配置してこのジャッキにPC鋼線42を挿通する。
このPC鋼線42は、更生管3の表面から突出している三角状のトラス筋31の内空をも貫通している。
固定枠4のセンターホールジャッキによってPC鋼線42を牽引することにより、移動枠41は上流側に移動する。
この移動枠41の移動により、更生管3を上流側に加圧して前進させることができる。
<5> Movement of rehabilitation pipe 3.
The single unit of the rehabilitation pipe 3 is pressurized and moved toward the upstream side in the pipe line direction inside the existing pipe 2 path.
For this purpose, the fixed frame 4 is arranged on the upstream side, and the moving frame 41 is arranged on the downstream side.
A PC steel wire 42 is connected between the two frames, a center hole jack is arranged in each frame, and the PC steel wire 42 is inserted into the jack.
The PC steel wire 42 also penetrates the inner space of the triangular truss bar 31 protruding from the surface of the rehabilitated pipe 3.
By pulling the PC steel wire 42 by the center hole jack of the fixed frame 4, the moving frame 41 moves upstream.
By the movement of the moving frame 41, the rehabilitation pipe 3 can be pushed forward and advanced.

<6> 移動枠41の後退。
更生管3を一定距離前進させたら、PC鋼線42の拘束を解除した状態の移動枠41だけを後退する。(図5)
次に固定枠4のセンターホールジャッキを開放してPC鋼線42の拘束を解除する。
<6> Retraction of the moving frame 41.
When the rehabilitation pipe 3 is moved forward by a certain distance, only the moving frame 41 in a state where the restraint of the PC steel wire 42 is released is moved backward. (Fig. 5)
Next, the center hole jack of the fixed frame 4 is opened, and the restraint of the PC steel wire 42 is released.

<7>新たな更生管の設置。
その状態で、仮排水管1を切断して、次の更生管3を設置する。
さらに、固定枠4側で開放したPC鋼線42を下流側に引き寄せて、新たな更生管3のトラス筋31の空間を通したPC鋼線42の端部を移動枠41のセンターホールジャッキ41aに貫通させる。(図6)
<7> Installation of new rehabilitation pipes.
In this state, the temporary drain pipe 1 is cut and the next rehabilitation pipe 3 is installed.
Further, the PC steel wire 42 opened on the fixed frame 4 side is drawn to the downstream side, and the end portion of the PC steel wire 42 passing through the space of the truss bar 31 of the new renovated pipe 3 is moved to the center hole jack 41a of the moving frame 41. To penetrate. (Fig. 6)

<8>更生管の引き寄せ。
その後、仮排水管1を接続し、固定枠4側のセンターホールジャッキを引き寄せることにより、移動枠41の前進を介して更生管3を前進させる工程は上記の説明の通りである。(図7)
上記の作業を連続して行うことにより、順次更生管3の単体を加圧して更生管3の連続体を形成する。
<8> Pulling the rehabilitation pipe.
Thereafter, the step of advancing the rehabilitation pipe 3 through the advancement of the moving frame 41 by connecting the temporary drain pipe 1 and pulling the center hole jack on the fixed frame 4 side is as described above. (Fig. 7)
By continuously performing the above operations, the single unit of the rehabilitation pipe 3 is sequentially pressurized to form a continuous body of the rehabilitation pipe 3.

<9>緊張、裏込め。
こうして既設管2の内部に更生管3の連続体を形成する。
そして更生管3の外周に配置したPC鋼線42を、固定枠4と移動枠41のセンターホールジャッキ41aを使用して緊張する。
緊張後に、更生管3の注入口を介して連続体の外周と既設管2の内周の間にグラウト材7を注入して硬化させる。
グラウト材7が所定の強度に達した時点で、センターホールジャッキを開放して更生管3の連続体にプレストレスを導入する。
その後、仮排水管1などを撤去して更生を完了する。
<9> Tension, back-filling.
In this way, a continuous body of the rehabilitation pipe 3 is formed inside the existing pipe 2.
And the PC steel wire 42 arrange | positioned on the outer periphery of the renovated pipe 3 is tensioned using the center hole jack 41a of the fixed frame 4 and the moving frame 41.
After the tension, the grout material 7 is injected between the outer periphery of the continuum and the inner periphery of the existing pipe 2 through the inlet of the rehabilitated pipe 3 and cured.
When the grout material 7 reaches a predetermined strength, the center hole jack is opened and prestress is introduced into the continuum of the rehabilitated pipe 3.
Thereafter, the temporary drain pipe 1 and the like are removed to complete the rehabilitation.

<10> 他の実施例。(図9〜図11)
仮排水管1を毎回、切断せずにその外周に分割型枠を配置してグラウト材を注入する方法である。
すなわち、下流側のマンホールBにおいて、仮排水管1の外周に更生管3の単体を設置する場合に、円筒ではなく、円筒を中心軸方向に分割した分割型枠5を仮排水管1の外周に配置する。
この分割型枠5を連結して円筒状の型枠を形成する。
分割型枠5を組み立てて円筒型枠を形成したら、この円筒型枠の外面と既設管2の内面との間の空間に、円筒型枠の外周に巻きつける状態で巻きつけ鋼線6を巻きつけて配置する。
この巻きつけ鋼線6は、地上においた鋼線ドラム61から順次送り出して巻きつけるが、そのために中間に自動鋼線巻きつけ装置62を介在させれば作業はよりスムーズである。
なお、巻きつけ鋼線6を巻きつける際にはいったん、接続部11で仮排水管1を解体してから接続してもよい。
その状態で、上記の実施例と同様に、固定枠4と移動枠41との間に配置したPC鋼線42によって移動枠41を上流に向けて牽引して移動させる。
この移動枠41の前進によって順次、組み立てた円筒型枠を管路方向の上流に加圧して移動させて接続する。
こうして仮排水管1の外周に円筒型枠を、既設管2路の内部で移動させ、順次接続して円筒型枠の連続体を形成する。
この連続体の外周と、既設管2の内周の間にグラウト材7を注入して硬化させて管路の更生を行う。
なお、図10に示すように仮排水管1を止水壁21に取り付け、止水壁21より上流の下水を仮排水管1に導入する構成以外に、図11に示すように仕切壁21を使わず、それに代わって仮排水管1の端部の外周に膨張する止水袋22を取りつけ、この止水袋22を膨張させて既設管2の内周面に圧着し、それよりも上流の下水を仮排水管1内に導入するような構造を採用することもできる。
<10> Other examples. (FIGS. 9 to 11)
This is a method of injecting the grout material by disposing the divided mold on the outer periphery without cutting the temporary drain pipe 1 every time.
That is, in the downstream manhole B, when the single rehabilitating pipe 3 is installed on the outer periphery of the temporary drainage pipe 1, the divided form 5 in which the cylinder is divided in the central axis direction is used instead of the cylinder. To place.
The divided mold 5 is connected to form a cylindrical mold.
When the divided form 5 is assembled to form a cylindrical form, a winding steel wire 6 is wound around the outer circumference of the cylindrical form in a space between the outer surface of the cylindrical form and the inner surface of the existing pipe 2. Put it on.
The wound steel wire 6 is sequentially fed from a steel wire drum 61 placed on the ground and wound. However, if an automatic steel wire winding device 62 is interposed in the middle, the operation is smoother.
In addition, when winding the wound steel wire 6, the temporary drain pipe 1 may be once disassembled at the connection portion 11 and then connected.
In this state, the moving frame 41 is pulled and moved upstream by the PC steel wire 42 arranged between the fixed frame 4 and the moving frame 41 as in the above-described embodiment.
By sequentially moving the moving frame 41, the assembled cylindrical frame is pressurized and moved upstream in the pipeline direction and connected.
In this way, the cylindrical frame is moved inside the existing pipe 2 on the outer periphery of the temporary drain pipe 1, and sequentially connected to form a continuous body of the cylindrical frame.
The grout material 7 is injected between the outer periphery of the continuous body and the inner periphery of the existing pipe 2 to cure the pipe line.
In addition to the configuration in which the temporary drain pipe 1 is attached to the water stop wall 21 as shown in FIG. 10 and the sewage upstream from the water stop wall 21 is introduced into the temporary drain pipe 1, the partition wall 21 is provided as shown in FIG. Instead, use a water stop bag 22 that expands on the outer periphery of the end of the temporary drain pipe 1 instead, and inflates the water stop bag 22 and crimps it to the inner peripheral surface of the existing pipe 2. A structure in which sewage is introduced into the temporary drain pipe 1 can also be adopted.

本発明の管路の更生方法の施工中の説明図。Explanatory drawing during construction of the rehabilitation method of the pipe line of this invention. 施工中の要部の説明図。Explanatory drawing of the principal part under construction. 施工中の要部の断面図。Sectional drawing of the principal part under construction. 施工順序の説明図であり、更生管を吊り下ろした状態。It is explanatory drawing of a construction order, and the state which suspended the rehabilitation pipe | tube. 施工順序の説明図であり、移動枠を後退させ、仮排水管を切断した状態。It is explanatory drawing of a construction order, the state which retracted the moving frame and cut | disconnected the temporary drain pipe. 施工順序の説明図であり、新たな更生管を吊り下ろし、PC鋼線をセットした状態。It is an explanatory diagram of the construction sequence, with a new rehabilitation pipe suspended and a PC steel wire set. 施工順序の説明図であり、仮排水管を再度連結した状態。It is explanatory drawing of a construction order, and the state which connected the temporary drain pipe again. 施工順序の説明図であり、新たな更生管が前進した状態。It is explanatory drawing of a construction order, and the state where the new rehabilitation pipe advanced. 管路の更生方法の他の実施例の説明図Explanatory drawing of the other Example of the rehabilitation method of a pipe line 他の実施例の断面図。Sectional drawing of another Example. 止水袋を膨張させて下水流を仮排水管に導入した状態の説明図。Explanatory drawing of the state which expanded the water stop bag and introduced the sewage flow into the temporary drain pipe.

符号の説明Explanation of symbols

1:仮排水管
2:既設管
3:更生管
4:固定枠
41:移動枠
5:分割型枠
6:巻きつけ鋼線
7:グラウト材
1: Temporary drain pipe 2: Existing pipe 3: Rehabilitation pipe 4: Fixed frame 41: Moving frame 5: Divided form 6: Wrapped steel wire 7: Grout material

Claims (4)

既設の管路内に、既設の管路の内径よりも外径の小さい仮排水管を設置し、
この仮排水管の外周に、円筒であって、既設の管路の内径よりも外径が小さく、かつ仮排水管の外径よりも内径の大きい更生管の単体を設置し、
更生管の単体を、既設管路の内部で管路方向に加圧して移動させ、
順次単体を加圧して更生管の連続体を形成し、
この連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う、
管路の更生方法。
Install a temporary drain pipe with an outer diameter smaller than the inner diameter of the existing pipe line in the existing pipe line,
On the outer periphery of this temporary drainage pipe, a single rehabilitation pipe that is cylindrical and has an outer diameter smaller than the inner diameter of the existing pipe line and an inner diameter larger than the outer diameter of the temporary drainage pipe,
A single unit of the rehabilitated pipe is moved in the direction of the pipeline inside the existing pipeline,
Pressurize the single unit sequentially to form a continuous body of rehabilitation pipes,
Injecting and curing grout material between the outer circumference of this continuous body and the inner circumference of the existing pipe,
Rehabilitation method for pipelines.
更生管はハーフプレキャスト版で構成し、
更生管の内部に配置したトラスの一部を外表面から突出させ、
この突出したトラスにPC鋼線を挿入して、
このPC鋼線を緊張することにより、
更生管の移動を行い、
かつその後の更生管の連続体の緊張を行い、
PC鋼線を含んで、更生管の連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う、
請求項1記載の管路の更生方法。
The rehabilitation pipe is a half precast version,
Project a part of the truss placed inside the rehabilitation pipe from the outer surface,
Insert the PC steel wire into this protruding truss,
By tensioning this PC steel wire,
Move the rehabilitation pipe,
And the tension of the continuum of the rehabilitation pipe after that,
Including PC steel wire, grout material is injected and hardened between the outer periphery of the continuous body of the rehabilitated pipe and the inner periphery of the existing pipe.
The method for rehabilitating a pipeline according to claim 1.
仮排水管の外周に、更生管の単体を設置する場合に、
仮排水管の一部を切断した後に、
更生管を設置し、
更生管の設置後に再度、仮排水管の切断部分を接続して行う、
請求項1記載の管路の更生方法。
When installing a single rehabilitation pipe around the temporary drain pipe,
After cutting a part of the temporary drain pipe,
Set up a rehabilitation pipe,
Connect the cut part of the temporary drain pipe again after installing the rehabilitation pipe.
The method for rehabilitating a pipeline according to claim 1.
仮排水管の外周に、更生管の単体を設置する場合に、
仮排水管の外周に、円筒を中心軸方向に分割した分割型枠を配置し、
分割型枠を接続することによって、仮排水管の外周に円筒状に円筒型枠を配置し、
この円筒型枠の外面と既設管の内面との間の空間に、円筒型枠の外周に巻きつける状態で鋼線を配置し、
円筒型枠を、既設管路の内部で管路方向に加圧して移動させ、
順次、円筒型枠を加圧して円筒型枠の連続体を形成し、
この連続体の外周と、既設管の内周の間にグラウト材を注入して硬化させて行う、
管路の更生方法。
When installing a single rehabilitation pipe around the temporary drain pipe,
On the outer periphery of the temporary drain pipe, a split formwork that divides the cylinder in the central axis direction is placed
By connecting the divided formwork, the cylindrical formwork is arranged in a cylindrical shape on the outer periphery of the temporary drain pipe,
In the space between the outer surface of the cylindrical frame and the inner surface of the existing pipe, a steel wire is arranged in a state of being wound around the outer periphery of the cylindrical frame,
The cylindrical formwork is moved by pressing in the direction of the pipeline inside the existing pipeline,
Sequentially, pressurize the cylindrical form to form a continuous form of the cylindrical form,
Injecting and curing grout material between the outer circumference of this continuous body and the inner circumference of the existing pipe,
Rehabilitation method for pipelines.
JP2006131806A 2006-05-10 2006-05-10 Method for regenerating pipeline Pending JP2007303535A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012184811A (en) * 2011-03-07 2012-09-27 Ashimori Industry Co Ltd Method for repairing tubular channel
JP2013117235A (en) * 2011-12-01 2013-06-13 Ashimori Industry Co Ltd Method for repairing pipe line
JP5456937B1 (en) * 2013-11-27 2014-04-02 株式会社大阪防水建設社 Pipe rehabilitation method
JP2015010373A (en) * 2013-06-28 2015-01-19 株式会社湘南合成樹脂製作所 Regeneration method of existing pipe
JP2017210841A (en) * 2016-05-27 2017-11-30 明石セミシールド建設株式会社 Method and structure for regenerating existing pipe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004197875A (en) * 2002-12-20 2004-07-15 Kubota Corp Sheath pipe construction method and tool for pipe connection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004197875A (en) * 2002-12-20 2004-07-15 Kubota Corp Sheath pipe construction method and tool for pipe connection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012184811A (en) * 2011-03-07 2012-09-27 Ashimori Industry Co Ltd Method for repairing tubular channel
JP2013117235A (en) * 2011-12-01 2013-06-13 Ashimori Industry Co Ltd Method for repairing pipe line
JP2015010373A (en) * 2013-06-28 2015-01-19 株式会社湘南合成樹脂製作所 Regeneration method of existing pipe
JP5456937B1 (en) * 2013-11-27 2014-04-02 株式会社大阪防水建設社 Pipe rehabilitation method
JP2017210841A (en) * 2016-05-27 2017-11-30 明石セミシールド建設株式会社 Method and structure for regenerating existing pipe

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