JP2013119869A - Bypass construction method with bidirectional closing function - Google Patents

Bypass construction method with bidirectional closing function Download PDF

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JP2013119869A
JP2013119869A JP2011266650A JP2011266650A JP2013119869A JP 2013119869 A JP2013119869 A JP 2013119869A JP 2011266650 A JP2011266650 A JP 2011266650A JP 2011266650 A JP2011266650 A JP 2011266650A JP 2013119869 A JP2013119869 A JP 2013119869A
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pipe
bypass pipe
bypass
existing
rectangular
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JP5898479B2 (en
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Tetsuya Sugano
哲也 菅野
Shuhei Morita
修平 森田
Masato Hatakeyama
正人 畠山
Yasuhiro Sugano
泰弘 菅野
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TAKAHASHI SHUWA CONSTRUCTION CO Ltd
TAKAHASHI-SHUWA CONSTRUCTION CO Ltd
Chiyoda Geotech Co Ltd
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TAKAHASHI SHUWA CONSTRUCTION CO Ltd
TAKAHASHI-SHUWA CONSTRUCTION CO Ltd
Chiyoda Geotech Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a bypass pipe with a bidirectional closing function for using a bypass construction method using a water cut-off plug, a seal plug and a bypass unit, and the bypass construction method with the bidirectional closing function.SOLUTION: The bypass pipe with the bidirectional closing function includes a bypass pipe body 3 forming a straight line-shaped rectangular cylindrical shape having both end opening parts 1 and 2 at the ends, and side surface opening parts 4 and 5 of the same diameter as both end opening parts 1 and 2 on both side surfaces of the bypass pipe body 3. A rectangular box 7 bulged to the outside is formed in both end opening parts 2 on the seal plug side (the downstream side), and a blocking opening 9 capable of inserting a plate-like blocking plate (unillustrated) for blocking flowing water, is formed on an upper surface of the box 7. Rectangular boxes 12 and 12 swelling to the outside are integrally formed in the side surface opening parts 4 and 5, and blocking openings 13 and 13 capable of inserting plate-like blocking plates (unillustrated) for blocking the flowing water, are formed on an upper surface of the boxes 12 and 12.

Description

本発明は、下水道の既設管に新設管を切替え設置する際に、2方向締切機能付きバイパス管を使用する2方向締切機能付きバイパス工法に関するものである。   The present invention relates to a bypass construction method with a two-way cutoff function that uses a bypass pipe with a two-way cutoff function when a new pipe is switched to an existing pipe of a sewer.

下水道のマンホール内部の更正・補修工事を行う場合には、衛生面、安全性等の観点から、流下中の下水(汚水)に対する処置が必要であり、施工に際しては、対象となる下水道の規模に応じて様々な対策が講じられている。例えば、接続される下水道管の口径が大きく、比較的規模が大きい場合には、たとえ一時的であっても下水の流れを止めることは困難であるため、例えば、図12に示すようなバイパス工法により、施工個所Aをバイパスさせるという方法が実施されている。
具体的には、まず施工個所のマンホールAの上流側の下水道管Bの入口付近に空気注入式の止水プラグCを設置して、下水の流れを堰き止める。次に、前記止水プラグCによって堰き止められた下水を、施工個所Aの上流側のマンホールD内に挿通させたバイパス管E及び道路F上に設置したポンプGによって吸引すると共に、施工個所Aの下流側のマンホールH内に挿通させたバイパス管Iから、下水の逆流を防止するために入口に土嚢Jを積んだ下流側の下水道管Kへ排出する。このようにすれば、下水は、施工個所Aを通らずに、連続的に下流側へ流下することになる。なお、L,Mは、下水道管である。
When repairing or repairing the inside of a sewer manhole, from the viewpoint of hygiene, safety, etc., it is necessary to take measures against the sewage (sewage) that is flowing down. Various measures are taken accordingly. For example, when the diameter of the connected sewer pipe is large and the scale is relatively large, it is difficult to stop the flow of sewage even if it is temporary. For example, the bypass method as shown in FIG. Thus, a method of bypassing the construction site A is implemented.
Specifically, first, an air injection type water stop plug C is installed near the entrance of the sewer pipe B on the upstream side of the manhole A at the construction site to block the flow of sewage. Next, the sewage blocked by the water stop plug C is sucked by the bypass pipe E inserted into the manhole D on the upstream side of the construction site A and the pump G installed on the road F, and the construction site A From the bypass pipe I inserted into the manhole H on the downstream side of the sewage, it is discharged to the downstream sewage pipe K loaded with sandbags J at the inlet in order to prevent backflow of sewage. If it does in this way, sewage will flow down to the downstream side continuously, without passing construction site A. L and M are sewer pipes.

本発明者は、上記バイパス工法を改善した止水プラグ、シールプラグ及びバイパスユニットを使用したバイパス工法を開発した(特許文献1を参照)。
このバイパス工法は、本体中央部に、下水を流下させるための大孔を有し、内部に流体を封入した中空構造のOリングが二つの挟持部材によって挟持されるように構成し、それらの挟持部材の間隔を狭めて前記Oリングを軸線方向へ圧縮することにより、前記Oリングの外周部が外側方向へ押し拡げられるような構造の止水プラグ(上流側)及びシールプラグ(下流側)と、前記止水プラグ及びシールプラグの大孔に接続可能なように構成されたバイパス管のバイパスユニットからなり、前記止水プラグ及びシールプラグを、それぞれ上流口及び下流口に設置し、それらをバイパス管のバイパスユニットによって連結することによって、上流側の下水道管及び下流側の下水道管を完全に遮断し、下水が流れる空間と作業空間とを分離することができるものである。
The present inventor has developed a bypass construction method using a water stop plug, a seal plug, and a bypass unit improved from the bypass construction method (see Patent Document 1).
This bypass construction method has a large hole for allowing sewage to flow down in the central part of the main body, and is configured so that a hollow O-ring filled with fluid is sandwiched between two sandwiching members. A water stop plug (upstream side) and a seal plug (downstream side) having a structure in which the outer periphery of the O ring is pushed outward by compressing the O ring in the axial direction by narrowing the interval between members; The bypass unit is configured to be connected to the large hole of the water stop plug and the seal plug, and the water stop plug and the seal plug are installed at the upstream port and the downstream port, respectively, and they are bypassed. By connecting with the pipe bypass unit, the upstream sewer pipe and the downstream sewer pipe are completely shut off, and the space where the sewage flows and the work space are separated. It is those that can be.

さらに、本発明者は、止水プラグ、シールプラグ及びバイパス管のバイパスユニットを使用したバイパス工法を利用した、下水道の既設管に新設管を切替え設置するバイパス工法の検討を行った。   Furthermore, the present inventor has studied a bypass construction method that uses a bypass construction method using a water stop plug, a seal plug, and a bypass pipe bypass unit to switch a newly installed pipe to an existing pipe of a sewer.

特願2003−421792号公報Japanese Patent Application No. 2003-421792

本発明は、下水道の既設管に新設管を切替え設置する際に、止水プラグ、シールプラグ及びバイパスユニットを使用したバイパス工法を利用することにより、2方向締切機能付きバイパス管を使用する2方向締切機能付きバイパス工法を提供することを目的とするものである。   The present invention uses a bypass pipe with a two-way cutoff function by using a bypass construction method using a water stop plug, a seal plug and a bypass unit when installing a new pipe to an existing pipe of a sewer. The purpose is to provide a bypass method with a deadline function.

本発明の2方向締切機能付きバイパス管は、端部に両端開口部を備えた直線状の矩形筒形状をなしたバイパス管本体と、該バイパス管本体の両側面に前記両端開口部と同一口径の側面開口部を備えた構成からなり、前記両端開口部には、それぞれの口縁周囲にフランジを設けて既知の止水プラグ及びシールプラグに接続した既設バイパス管に接続できるようにし、さらにシールプラグ側の両端開口部に外側に膨出した矩形のボックスを一体形成し、該ボックスの上部面には流水を遮断する平板状の遮断板を挿入できる遮断開口を形成し、また、前記側面開口部の口縁周囲にも、フランジを設けて新設バイパス管に接続できるようにし、さらに前記側面開口部にも、外側に膨出する矩形のボックスを一体形成し、該ボックスの上部面には流水を遮断する平板状の遮断板を挿入できる遮断開口を形成するものである。   The bypass pipe with a two-way cutoff function according to the present invention includes a bypass pipe body having a straight rectangular tube shape having opening portions at both ends, and the same diameter as the opening portions on both sides of the bypass pipe body. The side opening is provided with a flange around each mouth edge so that it can be connected to an existing bypass pipe connected to a known water stop plug and seal plug, and further sealed. A rectangular box bulging outward is integrally formed at both end openings on the plug side, and a blocking opening for inserting a flat blocking plate for blocking running water is formed on the upper surface of the box. A flange is also provided around the mouth edge of the section so that it can be connected to a newly established bypass pipe. Further, a rectangular box bulging outward is also integrally formed at the side opening, and a water flow is formed on the upper surface of the box. The And it forms a blocking aperture can be inserted a flat cut-off plate for disconnection.

本発明の2方向締切機能付きバイパス工法は、既設管と新設管との接合個所となる周囲を機械設置可能となる広さに掘り起こして立坑を形成して既設管を露出させ、既設管と新設管との接合個所となるバイパス管設置最小範囲の管上部半分を分離除去して開口させる第1工程と、既設管の管上部半分の開口部より、立坑内の既設管の上流及び下流の両側に止水プラグ及びシールプラグを設置し、下水の流れを堰き止め、止水プラグ及びシールプラグに既設バイパス管を連結し、該既設バイパス管の中間部に2方向締切機能付き矩形バイパス管を接続する第2工程と、2方向締切機能付き矩形バイパス管を設置後、適切な吊防護を行い、既設管の残り管下部半分を分離除去して撤去する第3工程と、既設管撤去完了後、新設管の到達できる範囲まで新設人孔を築造する第4工程と、新設人孔下部の築造完了し、新設人孔に新設管の接続完了後、新設管にシールプラグを設置し、シールプラグと2方向締切機能付き矩形バイパス管の側面開口部とを新設バイパス管で接続する第5工程と、2方向締切機能付き矩形バイパス管と新設管の接続が完了し下流側への流入水受入れ準備完了後、2方向締切機能付き矩形バイパス管の開口部のボックスに遮断板を挿入して既設管のシールプラグへの流下を遮断すると共に、2方向締切機能付き矩形バイパス管の側面開口部のボックスから遮断板を取り出して下水の流出締切部位を入れ替え、流出方向を切り替える第6工程と、流出方向の切替完了及び適切な吊防護完了後、2方向締切機能付き矩形バイパス管のフランジと既設バイパス管のフランジの固定連結を解除し、さらに既設管のシールプラグ及び既設バイパス管を撤去する第7工程と、設置完了確認後、新設人孔内の底面を逆アーチ状に仕上げてインバートを築造し、インバート築造完了後、適切な養生を経てから、新設管のシールプラグ、新設バイパス管及び2方向締切機能付き矩形バイパス管を撤去し、立坑を埋め戻して施工完了とする第8工程と、から成る。   The bypass construction method with a two-way cutoff function of the present invention digs up the area where the existing pipe and the new pipe are joined to a space where the machine can be installed, forms a vertical shaft, exposes the existing pipe, The first step of separating and removing the upper half of the pipe in the minimum range of bypass pipe installation, which becomes the junction with the pipe, and both upstream and downstream sides of the existing pipe in the shaft from the opening of the upper half of the existing pipe A water stop plug and a seal plug are installed in the pipe, the flow of sewage is blocked, the existing bypass pipe is connected to the water stop plug and the seal plug, and a rectangular bypass pipe with a two-way cutoff function is connected to the middle of the existing bypass pipe After installing the rectangular bypass pipe with the two-way cutoff function, perform appropriate suspension protection, separate and remove the lower half of the remaining pipe from the existing pipe, and after removing the existing pipe, The reach of the new pipe After the completion of the construction of the new manhole, the lower part of the new manhole is completed, and after the new pipe is connected to the new manhole, a seal plug is installed in the new pipe. Fifth step of connecting the side opening of the bypass pipe with the newly installed bypass pipe, and the two-way cutoff function after the connection of the rectangular bypass pipe with the two-way cutoff function and the new pipe is completed and preparation for receiving the incoming water downstream is completed. Insert a blocking plate into the box at the opening of the rectangular bypass pipe with a block to block the flow of the existing pipe to the seal plug, and take out the blocking plate from the box at the side opening of the rectangular bypass pipe with a two-way cutoff function to sewer After the completion of switching the outflow direction and completion of appropriate suspension protection, the flange of the rectangular bypass pipe with the two-way cutoff function and the flank of the existing bypass pipe are replaced. The seventh step of releasing the fixed connection of the existing pipe and removing the existing plug seal plug and the existing bypass pipe, and after confirming the completion of the installation, the bottom of the new manhole is finished in a reverse arch shape, and the invert is built. After completion, after an appropriate curing, the seal plug of the new pipe, the new bypass pipe and the rectangular bypass pipe with the two-way cutoff function are removed, and the shaft is backfilled to complete the construction.

本発明の2方向締切機能付きバイパス管は、下水道の既設管に新設管を切替え設置する際に、止水プラグ、シールプラグ及びバイパスユニットを使用したバイパス工法を利用することにより、両側面に開口部を備えているので、遮蔽板を取り外すことによって簡単に流出方向を切り替えることができる。
また、本発明の2方向締切機能付きバイパス工法は、下水の流れを堰き止めることなく、下水道の既設管に新設管を切替え設置することができる。
The bypass pipe with a two-way cutoff function of the present invention is opened on both sides by utilizing a bypass construction method using a water stop plug, a seal plug and a bypass unit when a new pipe is switched to an existing pipe of a sewer. Since the part is provided, the outflow direction can be easily switched by removing the shielding plate.
Moreover, the bypass construction method with the two-way cutoff function of the present invention can switch and install a new pipe to an existing pipe of a sewer without blocking the flow of sewage.

本発明の2方向締切機能付きバイパス管の平面図である。It is a top view of the bypass pipe with a two-way cutoff function of the present invention. 本発明の2方向締切機能付きバイパス管の正面図である。It is a front view of the bypass pipe with a two-way cutoff function of the present invention. 本発明の2方向締切機能付きバイパス管の右側面図である。It is a right view of the bypass pipe with a two-way cutoff function of this invention. 本発明の2方向締切機能付きバイパス工法の第1工程平面図である。It is a 1st process top view of a bypass construction method with a two-way deadline function of the present invention. 本発明の2方向締切機能付きバイパス工法の第2工程平面図である。It is a 2nd process top view of the bypass construction method with a two-way cutoff function of this invention. 本発明の2方向締切機能付きバイパス工法の第3工程平面図である。It is a 3rd process top view of the bypass construction method with a two-way deadline function of the present invention. 本発明の2方向締切機能付きバイパス工法の第4工程平面図である。It is a 4th process top view of the bypass construction method with a two-way deadline function of the present invention. 本発明の2方向締切機能付きバイパス工法の第5工程平面図である。It is a 5th process top view of the bypass construction method with a two-way cutoff function of the present invention. 本発明の2方向締切機能付きバイパス工法の第6工程平面図である。It is a 6th process top view of the bypass construction method with a two-way deadline function of the present invention. 本発明の2方向締切機能付きバイパス工法の第7工程平面図である。It is a 7th process top view of the bypass construction method with a two-way deadline function of the present invention. 本発明の2方向締切機能付きバイパス工法の第8工程平面図である。It is an 8th process top view of the bypass construction method with a two-way cutoff function of the present invention. 従来のバイパス工法の説明図である。It is explanatory drawing of the conventional bypass construction method.

本発明の2方向締切機能付きバイパス工法に使用される2方向締切機能付きバイパス管の一実施例を添付図面に基づいて、以下に説明する。
図1の平面図、図2の正面図、図3の右側面図に示すように、2方向締切機能付きバイパス管は、端部に両端開口部1,2を備えた直線状の矩形筒形状をなしたバイパス管本体3と、該バイパス管本体3の両側面に前記両端開口部1,2と同一口径の側面開口部4,5を備えている。なお、図1においては両端開口部1(右側)が止水プラグ(上流)側、両端開口部2(左側)がシールプラグ(下流)側となっている。
前記両端開口部1,2には、それぞれの口縁周囲にフランジ6,6を設けて既知の止水プラグ(図示せず)及びシールプラグ(図示せず)に接続した既設バイパス管(図示せず)に接続できるようにし、さらにシールプラグ側(下流側)の両端開口部2に外側に膨出する矩形のボックス7を一体形成し、該ボックス7の上部面には流水を遮断する平板状の遮断板(図示せず)を挿入できる遮断開口9を形成する。
なお、前記両端開口部1,2のフランジ6,6の周面には、既知の止水プラグ(図示せず)及びシールプラグ(図示せず)に接続した既設バイパス管(図示せず)に接続できるように取付用のボルト孔10,10を形成している。
また、前記側面開口部4,5にも、フランジ11,11を設けて新設バイパス管に接続できるようにし、前記側面開口部4,5にも、外側に膨出する矩形のボックス12,12を一体形成し、該ボックス12,12の上部面には流水を遮断する平板状の遮断板(図示せず)を挿入できる遮断開口13,13を形成する。
なお、前記遮断開口9及び遮断開口13,13の口縁周囲にフランジ14,14,14を設けている。
One embodiment of a bypass pipe with a two-way cutoff function used in the bypass method with a two-way cutoff function of the present invention will be described below with reference to the accompanying drawings.
As shown in the plan view of FIG. 1, the front view of FIG. 2, and the right side view of FIG. 3, the bypass pipe with a two-way shut-off function has a linear rectangular tube shape with both end openings 1 and 2 at the end. The bypass pipe main body 3 is provided, and side opening parts 4 and 5 having the same diameter as the both end opening parts 1 and 2 are provided on both side surfaces of the bypass pipe main body 3. In FIG. 1, both end openings 1 (right side) are the water stop plug (upstream) side, and both end openings 2 (left side) are the seal plug (downstream) side.
The both end openings 1 and 2 are provided with existing bypass pipes (not shown) provided with flanges 6 and 6 around the respective rims and connected to known water stop plugs (not shown) and seal plugs (not shown). In addition, a rectangular box 7 bulging outward is integrally formed in the opening 2 on both ends on the seal plug side (downstream side), and the upper surface of the box 7 is a flat plate shape that blocks running water A blocking opening 9 into which a blocking plate (not shown) can be inserted is formed.
It should be noted that an existing bypass pipe (not shown) connected to a known water stop plug (not shown) and a seal plug (not shown) is provided on the peripheral surfaces of the flanges 6 and 6 of the opening portions 1 and 2 at both ends. Bolt holes 10 and 10 for attachment are formed so that they can be connected.
The side openings 4 and 5 are also provided with flanges 11 and 11 so that they can be connected to a new bypass pipe. The side openings 4 and 5 also have rectangular boxes 12 and 12 that bulge outward. Formed integrally, the upper surfaces of the boxes 12 and 12 are formed with blocking openings 13 and 13 into which flat blocking plates (not shown) for blocking running water can be inserted.
In addition, flanges 14, 14, and 14 are provided around the mouth edges of the blocking opening 9 and the blocking openings 13, 13.

次に、本発明の2方向締切機能付きバイパス管を使用した2方向締切機能付きバイパス工法の施工手順を添付図面に基づいて、以下に説明する。   Next, the construction procedure of the bypass method with a two-way cutoff function using the bypass pipe with the two-way cutoff function of the present invention will be described below with reference to the accompanying drawings.

第1工程:図4の平面図に示すように、既設管15と新設管16との接合個所となる土留め範囲17をマシン回収範囲18となる広さに掘り起こして立坑を形成し、既設管15を露出させる。なお、前記立坑の大きさは、バイパス工法の施工に際して新設人孔(マンホール)24の大きさがあれば可能であるため、推進工法に合わせて築造する。
立坑が形成されたら、既設管15と新設管16との接合個所となるバイパス管設置最小範囲19の管上部半分を分離除去して開口させる。
1st process: As shown in the top view of FIG. 4, the earth retaining range 17 used as the junction of the existing pipe 15 and the new pipe 16 is dug up to the width which becomes the machine collection | recovery range 18, a shaft is formed, and an existing pipe is formed. 15 is exposed. In addition, since the size of the shaft is possible if the size of the new manhole (manhole) 24 is sufficient for the construction of the bypass method, the shaft is constructed according to the propulsion method.
When the shaft is formed, the pipe upper half of the bypass pipe installation minimum range 19 that becomes a joint between the existing pipe 15 and the new pipe 16 is separated and opened.

第2工程:図5の平面図に示すように、既設管15の管上部半分の開口部より、立坑内の既設管15の上流及び下流の両側に止水プラグ20及びシールプラグ21を設置し、下水の流れを堰き止める。そして、止水プラグ20及びシールプラグ21に既設バイパス管22を連結し、該既設バイパス管22の中間部に2方向締切機能付き矩形バイパス管23を接続する。   2nd process: As shown in the top view of FIG. 5, the water stop plug 20 and the seal plug 21 are installed in the both upstream and downstream sides of the existing pipe 15 in the shaft from the opening part of the pipe upper half of the existing pipe 15. Damming the sewage flow. Then, the existing bypass pipe 22 is connected to the water stop plug 20 and the seal plug 21, and a rectangular bypass pipe 23 with a two-way cutoff function is connected to an intermediate portion of the existing bypass pipe 22.

第3工程:図6の平面図に示すように、2方向締切機能付き矩形バイパス管23を設置後、適切な吊防護を行う。そして、既設管15の残り管下部半分を分離除去して撤去する。
その際、前記2方向締切機能付き矩形バイパス管23は、両端開口部1,2を開口し、側面開口部4,5に遮断板(図示せず)を挿入して閉鎖しているので、下水は既設管15から止水プラグ20→既設バイパス管22→2方向締切機能付き矩形バイパス管23→既設バイパス管22→シールプラグ21を介して既設管15の下流へ流すことが出来る。
Third step: As shown in the plan view of FIG. 6, after installing the rectangular bypass pipe 23 with the two-way cutoff function, appropriate suspension protection is performed. Then, the remaining lower half of the existing pipe 15 is separated and removed.
At that time, the rectangular bypass pipe 23 with the two-way shut-off function opens the both end openings 1 and 2 and closes the side openings 4 and 5 by inserting a blocking plate (not shown). Can flow from the existing pipe 15 downstream of the existing pipe 15 via the water stop plug 20 → the existing bypass pipe 22 → the rectangular bypass pipe 23 with a two-way cutoff function → the existing bypass pipe 22 → the seal plug 21.

第4工程:図7の平面図に示すように、既設管15撤去完了後、新設管16の到達できる範囲、即ち既設管15と新設管16の接続個所の範囲まで新設人孔(マンホール)24を築造する。   Fourth step: As shown in the plan view of FIG. 7, after the removal of the existing pipe 15 is completed, the new manhole 24 extends to the reachable range of the new pipe 16, that is, to the range where the existing pipe 15 and the new pipe 16 are connected. Build.

第5工程:図8の平面図に示すように、新設人孔(マンホール)24下部の築造完了し、新設人孔(マンホール)24に新設管16を接続完了後、新設管16にシールプラグ25を設置し、シールプラグ25と2方向締切機能付き矩形バイパス管23の側面開口部4又は側面開口部5とを新設バイパス管26で接続する。その際、2方向締切機能付き矩形バイパス管23は既設管15と通水状態のまま新設バイパス管26に接続する。   Fifth step: As shown in the plan view of FIG. 8, after the construction of the lower part of the new manhole 24 is completed and the new pipe 16 is connected to the new manhole 24, the seal plug 25 is attached to the new pipe 16. And the seal plug 25 and the side opening 4 or the side opening 5 of the rectangular bypass pipe 23 with the two-way cutoff function are connected by the new bypass pipe 26. At that time, the rectangular bypass pipe 23 with a two-way cutoff function is connected to the new bypass pipe 26 while being in a water-permeable state with the existing pipe 15.

第6工程:図9の平面図に示すように、2方向締切機能付き矩形バイパス管23と新設管16の接続が完了し下流側への流入水受入れ準備完了後、2方向締切機能付き矩形バイパス管23の開口部2のボックス7に遮断板(図示せず)を挿入して既設管15のシールプラグ21への流下を遮断すると共に、2方向締切機能付き矩形バイパス管23の側面開口部4又は側面開口部5のボックス12から遮断板(図示せず)を取り出して下水の流出締切部位を入れ替え、流出方向を切り替える。   Step 6: As shown in the plan view of FIG. 9, after the connection of the rectangular bypass pipe 23 with the two-way cutoff function and the new pipe 16 is completed and preparation for receiving the inflow water downstream is completed, the rectangular bypass with the two-way cutoff function A blocking plate (not shown) is inserted into the box 7 of the opening 2 of the pipe 23 to block the flow of the existing pipe 15 to the seal plug 21 and the side opening 4 of the rectangular bypass pipe 23 with a two-way cutoff function. Alternatively, a blocking plate (not shown) is taken out from the box 12 of the side opening 5, the sewage outflow cut-off site is replaced, and the outflow direction is switched.

第7工程:図10の平面図に示すように、流出方向の切替完了及び適切な吊防護完了後、2方向締切機能付き矩形バイパス管23のフランジ6と既設バイパス管22のフランジ(図示せず)の固定連結を解除し、さらに既設管15のシールプラグ21及び既設バイパス管22を撤去する。   Step 7: As shown in the plan view of FIG. 10, after completion of switching of the outflow direction and completion of appropriate suspension protection, the flange 6 of the rectangular bypass pipe 23 with the two-way cutoff function and the flange of the existing bypass pipe 22 (not shown) ) Is released, and the seal plug 21 and the existing bypass pipe 22 of the existing pipe 15 are removed.

第8工程:図11の平面図に示すように、設置完了確認後、新設人孔(マンホール)24内の底面を逆アーチ状に仕上げてインバートを築造する。
インバート築造完了後、適切な養生を経てから、新設管16のシールプラグ25、新設バイパス管26及び2方向締切機能付き矩形バイパス管23を撤去し、土留め範囲17の立坑を埋め戻して施工完了とする。
Eighth step: As shown in the plan view of FIG. 11, after confirming the completion of the installation, the bottom surface in the new manhole 24 is finished in an inverted arch shape to build an invert.
After completion of invert construction, after proper curing, the seal plug 25 of the new pipe 16, the new bypass pipe 26 and the rectangular bypass pipe 23 with a two-way shut-off function are removed, and the shaft in the earth retaining range 17 is backfilled and the construction is completed And

1 両端開口部
2 両端開口部
3 バイパス管本体
4 側面開口部
5 側面開口部
6 フランジ
7 ボックス
8 遮断板(図示せず)
9 遮断開口
10 ボルト孔
11 フランジ
12 ボックス
13 遮断開口
14 フランジ
15 既設管
16 新設管
17 土留め範囲
18 マシン回収範囲
19 バイパス管設置最小範囲
20 止水プラグ
21 シールプラグ
22 既設バイパス管
23 2方向締切機能付き矩形バイパス管
24 新設人孔(マンホール)
25 シールプラグ
26 新設バイパス管
DESCRIPTION OF SYMBOLS 1 Both-ends opening 2 Both-ends opening 3 Bypass pipe main body 4 Side opening 5 Side opening 6 Flange 7 Box 8 Blocking board (not shown)
9 Blocking opening 10 Bolt hole 11 Flange 12 Box 13 Blocking opening 14 Flange 15 Existing pipe 16 New pipe 17 Earth retaining area 18 Machine recovery range 19 Bypass pipe installation minimum range 20 Water stop plug 21 Seal plug 22 Existing bypass pipe 23 Two-way cutoff Rectangular bypass pipe 24 with functions New manhole
25 Seal plug 26 New bypass pipe

Claims (2)

端部に両端開口部を備えた直線状の矩形筒形状をなしたバイパス管本体と、該バイパス管本体の両側面に前記両端開口部と同一口径の側面開口部を備えた構成からなり、前記両端開口部には、それぞれの口縁周囲にフランジを設けて既知の止水プラグ及びシールプラグに接続した既設バイパス管に接続できるようにし、さらにシールプラグ側の両端開口部に外側に膨出した矩形のボックスを一体形成し、該ボックスの上部面には流水を遮断する平板状の遮断板を挿入できる遮断開口を形成し、また、前記側面開口部の口縁周囲にも、フランジを設けて新設バイパス管に接続できるようにし、さらに前記側面開口部にも、外側に膨出する矩形のボックスを一体形成し、該ボックスの上部面には流水を遮断する平板状の遮断板を挿入できる遮断開口を形成することを特徴とする2方向締切機能付きバイパス管。   The bypass pipe main body having a linear rectangular tube shape having both end openings at the ends, and a structure comprising side opening portions having the same diameter as the both end openings on both side surfaces of the bypass pipe main body, The opening at both ends is provided with a flange around each rim so that it can be connected to an existing bypass pipe connected to a known water stop plug and seal plug, and further bulges outward at both end openings on the seal plug side. A rectangular box is integrally formed, and a blocking opening for inserting a flat blocking plate for blocking running water is formed on the upper surface of the box, and a flange is provided around the edge of the side opening. A rectangular box that bulges outward can be formed integrally with the side opening, and a flat plate-shaped blocking plate that blocks running water can be inserted into the upper surface of the box. Open 2 Direction deadline function bypass pipe and forming a. 既設管と新設管との接合個所となる周囲を機械設置可能となる広さに掘り起こして立坑を形成して既設管を露出させ、既設管と新設管との接合個所となるバイパス管設置最小範囲の管上部半分を分離除去して開口させる第1工程と、既設管の管上部半分の開口部より、立坑内の既設管の上流及び下流の両側に止水プラグ及びシールプラグを設置し、下水の流れを堰き止め、止水プラグ及びシールプラグに既設バイパス管を連結し、該既設バイパス管の中間部に2方向締切機能付き矩形バイパス管を接続する第2工程と、2方向締切機能付き矩形バイパス管を設置後、適切な吊防護を行い、既設管の残り管下部半分を分離除去して撤去する第3工程と、既設管撤去完了後、新設管の到達できる範囲まで新設人孔を築造する第4工程と、新設人孔下部の築造完了し、新設人孔に新設管の接続完了後、新設管にシールプラグを設置し、シールプラグと2方向締切機能付き矩形バイパス管の側面開口部とを新設バイパス管で接続する第5工程と、2方向締切機能付き矩形バイパス管と新設管の接続が完了し下流側への流入水受入れ準備完了後、2方向締切機能付き矩形バイパス管の開口部のボックスに遮断板を挿入して既設管のシールプラグへの流下を遮断すると共に、2方向締切機能付き矩形バイパス管の側面開口部のボックスから遮断板を取り出して下水の流出締切部位を入れ替え、流出方向を切り替える第6工程と、流出方向の切替完了及び適切な吊防護完了後、2方向締切機能付き矩形バイパス管のフランジと既設バイパス管のフランジの固定連結を解除し、さらに既設管のシールプラグ及び既設バイパス管を撤去する第7工程と、設置完了確認後、新設人孔内の底面を逆アーチ状に仕上げてインバートを築造し、インバート築造完了後、適切な養生を経てから、新設管のシールプラグ、新設バイパス管及び2方向締切機能付き矩形バイパス管を撤去し、立坑を埋め戻して施工完了とする第8工程と、から成ることを特徴とする2方向締切機能付きバイパス工法。   Bypassing the existing pipe and the new pipe, the area where the existing pipe and the new pipe are joined is dug up to a size that allows machine installation to form a vertical shaft, and the existing pipe is exposed. The first step of separating and removing the upper half of the pipe is opened, and the water stop plugs and seal plugs are installed on both the upstream and downstream sides of the existing pipe in the shaft from the opening of the upper half of the existing pipe. A second step in which the existing bypass pipe is connected to the water stop plug and the seal plug, and a rectangular bypass pipe with a two-way cutoff function is connected to an intermediate portion of the existing bypass pipe, and a rectangular with a two-way cutoff function After installing the bypass pipe, provide appropriate suspension protection, separate and remove the lower half of the existing pipe, and build a new manhole to the extent that the new pipe can be reached after the existing pipe is removed. The 4th process to do After the construction of the part is completed and the connection of the new pipe is completed to the new manhole, a seal plug is installed in the new pipe, and the seal plug is connected to the side opening of the rectangular bypass pipe with the two-way cutoff function with the new bypass pipe. After completion of the 5 steps and the connection of the rectangular bypass pipe with the two-way cutoff function and the newly installed pipe and the preparation of receiving the inflow water to the downstream side, a blocking plate is inserted into the opening box of the rectangular bypass pipe with the two-way cutoff function. A sixth step of blocking the flow of the existing pipe to the seal plug, taking out the blocking plate from the box at the side opening of the rectangular bypass pipe with a two-way cut-off function, switching the outflow cut-off portion of the sewage, and switching the outflow direction; After completion of switching the outflow direction and proper suspension protection, release the fixed connection between the flange of the rectangular bypass pipe with the two-way cutoff function and the flange of the existing bypass pipe, and seal the existing pipe After removing the lug and the existing bypass pipe, and after confirming the installation, the bottom of the new manhole is finished in a reverse arch shape to build the invert, and after the invert construction is completed, after proper curing, the new pipe A bypass construction method with a two-way cutoff function, comprising: an eighth step of removing the seal plug, the newly installed bypass pipe and the rectangular bypass pipe with a two-way cutoff function, and backfilling the shaft to complete the construction.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS647990U (en) * 1987-07-03 1989-01-17
JP2000346435A (en) * 1999-06-04 2000-12-15 Shin Nippon Air Technol Co Ltd Method of updating already-existing duct
JP2002031289A (en) * 2000-07-17 2002-01-31 Buyou Gas Kk Pipe laying method
JP2004204439A (en) * 2002-12-20 2004-07-22 Daido Kiko Kk Construction method for creating pit midway through running water conduit, and water pipe member
JP2004250881A (en) * 2003-02-18 2004-09-09 Komatsu Ltd Bypass system for discharge pipeline
JP2009127286A (en) * 2007-11-22 2009-06-11 Kubota Corp Fire spreading prevention device and drain pipe structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS647990U (en) * 1987-07-03 1989-01-17
JP2000346435A (en) * 1999-06-04 2000-12-15 Shin Nippon Air Technol Co Ltd Method of updating already-existing duct
JP2002031289A (en) * 2000-07-17 2002-01-31 Buyou Gas Kk Pipe laying method
JP2004204439A (en) * 2002-12-20 2004-07-22 Daido Kiko Kk Construction method for creating pit midway through running water conduit, and water pipe member
JP2004250881A (en) * 2003-02-18 2004-09-09 Komatsu Ltd Bypass system for discharge pipeline
JP2009127286A (en) * 2007-11-22 2009-06-11 Kubota Corp Fire spreading prevention device and drain pipe structure

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