JP7044610B2 - Support device for rehabilitation of existing pipes - Google Patents

Support device for rehabilitation of existing pipes Download PDF

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JP7044610B2
JP7044610B2 JP2018072155A JP2018072155A JP7044610B2 JP 7044610 B2 JP7044610 B2 JP 7044610B2 JP 2018072155 A JP2018072155 A JP 2018072155A JP 2018072155 A JP2018072155 A JP 2018072155A JP 7044610 B2 JP7044610 B2 JP 7044610B2
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support material
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直弥 津田
康 北山
達郎 馬場
佳郎 杉山
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Sekisui Chemical Co Ltd
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Description

本発明は、既設管の更生に用いられる支保装置に関し、特に既設管の内周に沿う更生管と既設管との間に裏込め材を充填する際に更生管内に設置される支保装置に関する。 The present invention relates to a support device used for rehabilitation of an existing pipe, and particularly to a support device installed in the rehabilitation pipe when filling a backfill material between the rehabilitation pipe along the inner circumference of the existing pipe and the existing pipe.

老朽化した下水管等の既設管の内周に更生管をライニングすることによって、既設管を更生することは公知である。このような工法の多くは、更生管の外周面と既設管の内周面の間にセメントミルクやモルタルなどの裏込め材を充填する。その際、裏込め材の注入圧及び浮力によって、更生管が断面変形ひいては座屈したり浮き上がったりしないように、更生管内に支保装置を設置する（特許文献１、２等参照）。 It is known to rehabilitate an existing pipe by lining the inner circumference of an existing pipe such as an aged sewer pipe. In most of these construction methods, a backfill material such as cement milk or mortar is filled between the outer peripheral surface of the rehabilitation pipe and the inner peripheral surface of the existing pipe. At that time, a support device is installed in the rehabilitation pipe so that the rehabilitation pipe does not bend or lift due to cross-sectional deformation due to the injection pressure and buoyancy of the backfill material (see Patent Documents 1, 2, etc.).

特許文献１，２の支保装置は、更生管内に配置された環状のフレームと、該環状フレームの外周の周方向に間隔を置いて設けられた複数の腹起しとを含む。各腹起しが更生管の内周面に押し当てられている。支保装置の上端部には、鉛直な棒状の支保材が設けられている。該支保材が、更生管の頂部に形成された貫通孔を通して既設管の頂部に突き当てられている。 The support device of Patent Documents 1 and 2 includes an annular frame arranged in a rehabilitation tube, and a plurality of abdominal upsets provided at intervals in the circumferential direction of the outer circumference of the annular frame. Each abdominal abdomen is pressed against the inner peripheral surface of the rehabilitation tube. A vertical rod-shaped support material is provided at the upper end of the support device. The support material is abutted against the top of the existing pipe through a through hole formed in the top of the rehabilitation pipe.

特開平１０－１２１５６５号公報Japanese Unexamined Patent Publication No. 10-121565 特開２０１３－２５６８５４号公報Japanese Unexamined Patent Publication No. 2013-256854

更生管と既設管との間に裏込め材を充填すると、前記棒状の支保材に裏込め材がくっ付く。このため、裏込め材の硬化後、前記支保材を撤去するために下方へ引き抜くのが容易でなかった。
本発明は、かかる事情に鑑み、更生管の頂部を貫通して既設管の頂部に突き当てられた支保材を、裏込め材の硬化後に容易に引き抜いて撤去できるようにすることを目的とする。 When the backfilling material is filled between the rehabilitation pipe and the existing pipe, the backfilling material adheres to the rod-shaped support material. Therefore, after the backfill material was cured, it was not easy to pull it downward in order to remove the support material.
In view of such circumstances, it is an object of the present invention to make it possible to easily pull out and remove the support material that has penetrated the top of the rehabilitation pipe and is abutted against the top of the existing pipe after the backfill material is hardened. ..

前記課題を解決するため、本発明は、既設管の内周に沿う更生管と前記既設管との間に裏込め材を充填する際に前記更生管に設置される支保装置であって、
前記更生管の周方向に間隔を置いて複数配置されるか又は前記更生管の少なくとも下側部に配置された腹起しを有して、前記更生管の内部に設けられた支保本体と、
前記支保本体に昇降可能に支持されるとともに、前記更生管の頂部に形成された貫通孔を貫通して前記既設管の頂部に突き当てられる支保材と、
前記支保材の上側部分に設けられ、前記裏込め材と前記支保材との接合を阻止又は解除する引抜容易化手段と、
を備えたことを特徴とする。 In order to solve the above problems, the present invention is a support device installed in the rehabilitation pipe when filling a backfill material between the rehabilitation pipe along the inner circumference of the existing pipe and the existing pipe.
A support body provided inside the rehabilitation tube, having a plurality of arrangements at intervals in the circumferential direction of the rehabilitation tube or having an abdomen arranged at least on the lower side of the rehabilitation tube.
A support material that is supported by the support body so as to be able to move up and down, and that penetrates a through hole formed in the top of the rehabilitation pipe and is abutted against the top of the existing pipe.
A pull-out facilitating means provided on the upper portion of the support material to prevent or release the joint between the backfill material and the support material.
It is characterized by being equipped with.

当該支保装置によれば、引抜容易化手段を設けておくことによって、裏込め材の充填時に該裏込め材と支保材とが接合されるのを阻止できる。または、裏込め材の硬化後に、該裏込め材と支保材との接合を解除できる。これによって、支保材を容易に下方へ引き抜いて撤去できる。
前記更生管の周方向に間隔を置いて複数配置された腹起しによって、更生管を内面側から押さえることで、裏込め材の注入圧に対して更生管の断面形状を保持して座屈を防止できる。かつ前記複数の腹起しによる押えと、前記支保材の既設管頂部への突き当てとによって、裏込め材の注入による浮力に対して更生管が浮き上がるのを防止できる。または、更生管の少なくとも下側部に配置された腹起しと前記支保材とによって、更生管の浮き上がりを防止できる。したがって、当該支保装置によれば、更生管の断面形状保持機能及び浮上防止機能のうち少なくとも浮上防止機能を担う。更生管が裏込め材の注入圧によっては座屈しない程度に高剛性である場合には、支保装置は少なくとも浮上防止機能を有していればよい。
更生管の下側部とは、更生管の高さ方向の中間より下側の部分を云う。 According to the support device, by providing the pull-out facilitation means, it is possible to prevent the backfill material and the support material from being joined when the backfill material is filled. Alternatively, after the backfill material is cured, the joint between the backfill material and the support material can be released. As a result, the support material can be easily pulled downward and removed.
By pressing the rehabilitation tube from the inner surface side by abdominal abdomen arranged at intervals in the circumferential direction of the rehabilitation tube, the cross-sectional shape of the rehabilitation tube is maintained and buckling with respect to the injection pressure of the backfill material. Can be prevented. In addition, the rehabilitation pipe can be prevented from being lifted by the buoyancy caused by the injection of the backfill material by the pressing by the plurality of abdominal raising and the abutting of the support material against the existing pipe top. Alternatively, the abdomen arranged at least in the lower part of the rehabilitation tube and the support material can prevent the rehabilitation tube from rising. Therefore, according to the support device, at least the levitation prevention function is performed among the cross-sectional shape holding function and the levitation prevention function of the rehabilitation pipe. When the rehabilitation pipe is so rigid that it does not buckle depending on the injection pressure of the backfill material, the support device may have at least a floating prevention function.
The lower part of the rehabilitation tube means the part below the middle in the height direction of the rehabilitation tube.

前記引抜容易化手段が、前記支保材における前記上側部分に被せられた柔軟なシートを含むことが好ましい。
これによって、裏込め材と支保材との間にシートが介在されることで、裏込め材と支保材との接合が阻止される。したがって、裏込め材の硬化後、支保材を容易に下方へ引き抜くことができる。 It is preferable that the pull-out facilitating means includes a flexible sheet covered with the upper portion of the support material.
As a result, the sheet is interposed between the backfill material and the support material, so that the joint between the backfill material and the support material is prevented. Therefore, after the backfill material is cured, the support material can be easily pulled out downward.

前記シートの一部が、前記貫通孔の内周面と前記支保材との間を通して前記更生管の内部に出ていることが好ましい。
これによって、シートが貫通孔の内周面と支保材との間に介在されることで、支保材と貫通孔の内周面との摩擦抵抗を低減でき、支保材の引き抜きを一層容易化できる。
また、支保材の引き抜き時、又は支保材を引き抜いた後で、シートの前記一部を下方へ引っ張ることで、シートを貫通孔から更生管の内側へ簡単に取出して除去できる。 It is preferable that a part of the sheet protrudes inside the rehabilitation pipe through between the inner peripheral surface of the through hole and the support material.
As a result, the sheet is interposed between the inner peripheral surface of the through hole and the support material, so that the frictional resistance between the support material and the inner peripheral surface of the through hole can be reduced, and the pulling out of the support material can be further facilitated. ..
Further, the sheet can be easily taken out from the through hole to the inside of the rehabilitation tube and removed by pulling the part of the sheet downward at the time of pulling out the support material or after pulling out the support material.

前記引抜容易化手段が、前記支保材における前記上側部分に被覆された離型剤を含むことが好ましい。
離型剤によって、裏込め材と支保材との接合を阻止したり解除を容易化したりできる。
離型剤としては、グリス、潤滑油などが挙げられる。 It is preferable that the pull-out facilitating means contains a mold release agent coated on the upper portion of the support material.
The mold release agent can prevent the backfill material from joining the support material and facilitate the release.
Examples of the mold release agent include grease and lubricating oil.

前記支保材における前記上側部分が、上端へ向かって縮径するテーパ部となっていることが好ましい。
これによって、裏込め材の硬化後、裏込め材と支保材との接合を解除しやすくなり、支保材を簡単に下方へ引き抜くことができる。 It is preferable that the upper portion of the support material is a tapered portion whose diameter is reduced toward the upper end.
As a result, after the backfill material is cured, it becomes easy to release the joint between the backfill material and the support material, and the support material can be easily pulled out downward.

本発明に係る支保装置によれば、更生管の頂部を貫通して既設管の頂部に突き当てられた支保材を、裏込め材の硬化後に容易に引き抜いて撤去することができる。 According to the support device according to the present invention, the support material that penetrates the top of the rehabilitation pipe and is abutted against the top of the existing pipe can be easily pulled out and removed after the backfill material is cured.

図１は、本発明の第１実施形態に係る支保装置を用いて更生施工中の既設管を、裏込め材の養生時の状態で示す正面断面図である。FIG. 1 is a front sectional view showing an existing pipe being rehabilitated using the support device according to the first embodiment of the present invention in a state at the time of curing of the backfill material. 図２（ａ）は、前記支保装置の支保材を更生管の貫通孔に通す前の状態を示す正面断面図である。図２（ｂ）は、前記支保材を既設管の頂部に突き当てた状態を示す正面断面図である。図２（ｃ）は、裏込め材の硬化後、前記支保材を下方へ引き抜く状態を示す正面断面図である。図２（ｄ）は、さらにシートを撤去する状態を示す正面断面図である。FIG. 2A is a front sectional view showing a state before the support material of the support device is passed through the through hole of the rehabilitation pipe. FIG. 2B is a front sectional view showing a state in which the support material is abutted against the top of the existing pipe. FIG. 2C is a front sectional view showing a state in which the support material is pulled out downward after the backfill material is cured. FIG. 2D is a front sectional view showing a state in which the sheet is further removed. 図３は、本発明の第２実施形態に係る支保装置を用いて更生施工中の既設管を、裏込め材の養生時の状態で示す正面断面図である。FIG. 3 is a front sectional view showing an existing pipe being rehabilitated using the support device according to the second embodiment of the present invention in a state at the time of curing of the backfill material. 図４は、本発明の第３実施形態に係る支保装置を用いて更生施工中の既設管を、裏込め材の養生時の状態で示す正面断面図である。FIG. 4 is a front sectional view showing an existing pipe being rehabilitated using the support device according to the third embodiment of the present invention in a state at the time of curing of the backfill material. 図５は、図４の円部Ｖにおける支保材の上側部分の拡大断面図である。FIG. 5 is an enlarged cross-sectional view of the upper portion of the support material in the circle portion V of FIG.

以下、本発明の実施形態を図面にしたがって説明する。
＜第１実施形態＞
図１及び図２は、本発明の第１実施形態を示したものである。図１に示すように、更生対象の既設管１は、老朽化した下水道管である。なお、既設管１は、下水道管に限られず、上水道管、農業用水管、水力発電導水管、ガス管等であってもよい。
既設管１の内周に沿って更生管３がライニングされることで、既設管１が更生される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 and 2 show the first embodiment of the present invention. As shown in FIG. 1, the existing pipe 1 to be rehabilitated is an aged sewer pipe. The existing pipe 1 is not limited to the sewer pipe, but may be a water pipe, an agricultural water pipe, a hydropower transmission pipe, a gas pipe, or the like.
The existing pipe 1 is rehabilitated by lining the rehabilitation pipe 3 along the inner circumference of the existing pipe 1.

詳細な図示は省略するが、更生管３は、例えば帯状部材（プロファイル）によって構成されている。該帯状部材が螺旋状に巻回されるとともに一周違いに隣接する縁どうしが接合されることによって、螺旋管状の更生管３が製管されている。 Although detailed illustration is omitted, the rehabilitation tube 3 is composed of, for example, a band-shaped member (profile). The spiral tubular rehabilitation tube 3 is manufactured by winding the strip-shaped member in a spiral shape and joining the adjacent edges so as to be different from each other.

更生管３と既設管１との間の管間隙間１ｄには裏込め材２が充填される。
充填に先立って、更生管３の内部に支保装置４が設置される。支保装置４は、支保本体１０と、支保材２０を備えている。支保本体１０は、例えば八角形をなす環状のフレーム１１と、複数の腹起し１２を有している。環状のフレーム１１が、更生管３の内周に沿っている。フレーム１１の外周側部には周方向に間隔を置いて複数の腹起し１２が配置されている。そのうち少なくとも１の腹起し１２Ｂは、更生管３の底部（下側部）に設けられている。腹起し１２は、更生管３の管軸方向（図１において紙面直交方向）と平行に延びている。各腹起し１２が、連結部材１３を介してフレーム１１に連結されている。
なお、フレーム１１は、更生管３の管軸方向に離れて複数設置されている。各フレーム１１から連結部材１３が放射状に延び出ている。各腹起し１２は、管軸方向に離れた複数の連結部材１３に連結されて支持されている。 The backfill material 2 is filled in the gap 1d between the rehabilitated pipes 3 and the existing pipes 1.
Prior to filling, a support device 4 is installed inside the rehabilitation pipe 3. The support device 4 includes a support main body 10 and a support material 20. The support main body 10 has, for example, an octagonal annular frame 11 and a plurality of abdominal ridges 12. An annular frame 11 runs along the inner circumference of the rehabilitation tube 3. A plurality of abdominal raisings 12 are arranged on the outer peripheral side of the frame 11 at intervals in the circumferential direction. At least one of the abdominal upset 12Bs is provided at the bottom (lower part) of the rehabilitation tube 3. The abdomen 12 extends parallel to the tube axis direction of the rehabilitation tube 3 (direction orthogonal to the paper surface in FIG. 1). Each raised 12 is connected to the frame 11 via a connecting member 13.
A plurality of frames 11 are installed apart from each other in the pipe axis direction of the rehabilitation pipe 3. The connecting member 13 extends radially from each frame 11. Each abdominal raising 12 is connected to and supported by a plurality of connecting members 13 separated in the pipe axis direction.

連結部材１３は、例えばねじ結合によってフレーム１１と連結されており、フレーム１１に対して径方向へ進退可能になっている。ひいては、腹起し１２がフレーム１１に対して径方向へ進退可能になっている。 The connecting member 13 is connected to the frame 11 by, for example, a screw connection, and can move forward and backward in the radial direction with respect to the frame 11. As a result, the abdominal upset 12 can advance and retreat in the radial direction with respect to the frame 11.

フレーム１１の上部には、支保材２０が鉛直に支持されている。支保材２０は、鋼製の棒材または鋼管によって構成されている。支保材２０の長さは、更生管３の半径より小さい。支保材２０は、例えばねじ結合によってフレーム１１と連結されており、フレーム１１に対して昇降可能になっている。
図２に示すように、支保材２０が下降位置にあるときは、支保材２０の全体が更生管３の頂部よりも下方（更生管３の内側）に引っ込んでいる。
図１に示すように、支保材２０が上昇位置にあるときは、支保材２０の上端部が、更生管３の頂部に形成された貫通孔３ｃを貫通して既設管１の頂部に突き当てられている。 A support material 20 is vertically supported on the upper part of the frame 11. The support material 20 is made of a steel rod or a steel pipe. The length of the support material 20 is smaller than the radius of the rehabilitation pipe 3. The support material 20 is connected to the frame 11 by, for example, a screw connection, and can be raised and lowered with respect to the frame 11.
As shown in FIG. 2, when the support material 20 is in the descending position, the entire support material 20 is retracted below the top of the rehabilitation pipe 3 (inside the rehabilitation pipe 3).
As shown in FIG. 1, when the support material 20 is in the raised position, the upper end portion of the support material 20 penetrates the through hole 3c formed in the top portion of the rehabilitation pipe 3 and abuts against the top portion of the existing pipe 1. Has been done.

図１に示すように、上昇位置にある支保材２０における貫通孔３ｃより上側部分２１には、柔軟なシート４０（引抜容易化手段）が設けられている。シート４０の材質は、軟質の樹脂でもよく、布切れでもよく、新聞紙などの紙であってもよい。シート４０は、支保材２０の上側部分２１の上端面及び周側面に被さっている。シート２０の端部（一部）は、貫通孔３ｃの内周面と支保材２０との間を通して更生管３の内部に出ている。 As shown in FIG. 1, a flexible sheet 40 (means for facilitating withdrawal) is provided in a portion 21 above the through hole 3c in the support material 20 at the raised position. The material of the sheet 40 may be a soft resin, a piece of cloth, or paper such as newspaper. The sheet 40 covers the upper end surface and the peripheral side surface of the upper end portion 21 of the support material 20. The end portion (part) of the sheet 20 is exposed to the inside of the rehabilitation pipe 3 through the space between the inner peripheral surface of the through hole 3c and the support material 20.

支保装置４は次のように使用される。
更生管３を既設管１の内周に沿って構築後、更生管３内に支保装置４を設置する。更生管３の頂部には予め貫通穴３ｃを形成しておく。
各連結部材１３をフレーム１１に対して径方向外側へ前進させることで、各腹起し１２を更生管３の内周面に押し当てる。
図２（ａ）に示すように、支保材２０にはシート４０を被せる。図２（ｂ）に示すように、該支保材２０をフレーム１１に対して上昇させることで、上側部分２１を貫通孔３ｃに通して既設管１の頂部に突き当てる。これによって、上下に突っ張り力が生じ、更生管３の底部が既設管１の底部に押し付けられる。
支保材２０の外周面と貫通孔３ｃの内周面との間の隙間は、シート４０によって塞ぐことで、容易に封止できる。 The support device 4 is used as follows.
After constructing the rehabilitation pipe 3 along the inner circumference of the existing pipe 1, the support device 4 is installed in the rehabilitation pipe 3. A through hole 3c is formed in advance at the top of the rehabilitation tube 3.
By advancing each connecting member 13 radially outward with respect to the frame 11, each abdominal raising 12 is pressed against the inner peripheral surface of the rehabilitation tube 3.
As shown in FIG. 2A, the support material 20 is covered with a sheet 40. As shown in FIG. 2B, by raising the support material 20 with respect to the frame 11, the upper portion 21 is passed through the through hole 3c and abutted against the top of the existing pipe 1. As a result, a tension force is generated up and down, and the bottom portion of the rehabilitation pipe 3 is pressed against the bottom portion of the existing pipe 1.
The gap between the outer peripheral surface of the support material 20 and the inner peripheral surface of the through hole 3c can be easily sealed by closing the gap with the sheet 40.

その後、図１に示すように、管間隙間１ｄにセメントミルクやモルタルなどの裏込め材２を充填する。このとき更生管３は外周側から裏込め材２の注入圧を受ける。これに対して、支保装置４の腹起し１２が更生管３を内側から押さえることで、更生管３が断面変形するのを防止でき、ひいては更生管３が座屈するのを防止できる。
さらに更生管３は裏込め材２から浮力を受ける。一方、支保装置４の底部腹起し１２Ｂやその他の腹起し１２と支保材２０とで上下に突っ張ることで、更生管３が前記浮力によって浮き上がるのを防止できる。これによって、更生管３の底部が既設管１の底部に押し付けられた状態に維持される。この結果、更生管３の流下勾配を既設管１の底部の流下勾配に合わせることができる。
支保装置４は、更生管３の断面形状保持機能及び浮上防止機能を担う。 After that, as shown in FIG. 1, the backfill material 2 such as cement milk or mortar is filled in the gap 1d between the pipes. At this time, the rehabilitation pipe 3 receives the injection pressure of the backfill material 2 from the outer peripheral side. On the other hand, by pressing the rehabilitation tube 3 from the inside by the abdominal raising 12 of the support device 4, it is possible to prevent the rehabilitation tube 3 from being deformed in cross section, and thus to prevent the rehabilitation tube 3 from buckling.
Further, the rehabilitation pipe 3 receives buoyancy from the backfill material 2. On the other hand, the rehabilitation tube 3 can be prevented from being lifted by the buoyancy by stretching the bottom of the support device 4 up and down with the abdomen 12B and other abdomen 12 and the support material 20. As a result, the bottom of the rehabilitation pipe 3 is maintained in a state of being pressed against the bottom of the existing pipe 1. As a result, the flow slope of the rehabilitation pipe 3 can be adjusted to the flow slope of the bottom of the existing pipe 1.
The support device 4 is responsible for the cross-sectional shape holding function and the floating prevention function of the rehabilitation pipe 3.

裏込め材２はシート４０にくっ付く。一方、裏込め材２と支保材２０との間にはシート４０が介在されるために、裏込め材２と支保材２０との接合が阻止される。
シート４０は、裏込め材２と支保材との接合を阻止する引抜容易化手段を構成している。
支保材２０が上端開口の管である場合、シート４０によって前記上端開口を覆うことで、裏込め材２が前記上端開口から支保材２０の内部に流入するのを防止できる。 The backfill material 2 sticks to the sheet 40. On the other hand, since the sheet 40 is interposed between the backfill material 2 and the support material 20, the joining between the backfill material 2 and the support material 20 is prevented.
The sheet 40 constitutes a pull-out facilitating means for preventing the backfill material 2 and the support material from being joined.
When the support material 20 is a pipe having an upper end opening, the backfilling material 2 can be prevented from flowing into the support material 20 from the upper end opening by covering the upper end opening with the sheet 40.

図２（ｃ）に示すように、裏込め材２の養生、硬化後、支保材２０を下降させて、上側部分２１を貫通孔３ｃから下方へ引き抜く。支保材２０は、裏込め材２とは接合されていないため、簡単に引き抜くことができる。また、貫通孔３ｃの内周面と支保材２０との間にシート４０が介在されることで、支保材２０と貫通孔３ｃの内周面との間の摩擦を低減でき、支保材２０の引き抜きを一層容易化できる。
その後、図２（ｄ）に示すように、シート４０の端部を掴んで下方へ引っ張る。これによって、シート４０を貫通孔３ｃから更生管３の内側へ簡単に引き抜いて除去できる。支保材２０の引き抜きと同時にシートを除去してもよい。
支保材２０及びシート４０の引き抜き後の貫通孔３ｃは、プラグ（図示せず）を嵌めて塞ぐ。
さらに腹起し１２を径方向内側へ引っ込ませることで、支保装置４を更生管から解放できる。その後、支保装置４を分解して撤去したり、次の施工スパンへ移設したりする。 As shown in FIG. 2 (c), after the backfill material 2 is cured and cured, the support material 20 is lowered and the upper portion 21 is pulled out downward from the through hole 3c. Since the support material 20 is not joined to the backfill material 2, it can be easily pulled out. Further, by interposing the sheet 40 between the inner peripheral surface of the through hole 3c and the supporting material 20, friction between the supporting material 20 and the inner peripheral surface of the through hole 3c can be reduced, and the supporting material 20 can be reduced. Pulling out can be made easier.
Then, as shown in FIG. 2 (d), the end portion of the sheet 40 is grasped and pulled downward. As a result, the sheet 40 can be easily pulled out from the through hole 3c to the inside of the rehabilitation tube 3 and removed. The sheet may be removed at the same time as the support material 20 is pulled out.
The through hole 3c of the support material 20 and the sheet 40 after being pulled out is closed by fitting a plug (not shown).
Further, the support device 4 can be released from the rehabilitation tube by raising the abdomen and retracting the abdomen 12 inward in the radial direction. After that, the support device 4 is disassembled and removed, or moved to the next construction span.

次に、本発明の他の実施形態を説明する。以下の実施形態において既述の形態と重複する構成に関しては、図面に同一符号を付して説明を省略する。
＜第２実施形態＞
図３は、本発明の第２実施形態を示したものである。
第２実施形態においては、更生管３Ｂが高剛性である。すなわち、充填時の裏込め材２からの圧力で座屈しない程度の剛性を有している。具体的には、詳細な図示は省略するが、螺旋管状の更生管３Ｂとなる帯状部材（プロファイル）が、ポリ塩化ビニルなどの合成樹脂からなる主帯材と、スチールなどの金属からなる補強帯材を有しており、補強帯材によって帯状部材ひいては更生管３Ｂの剛性が高められている。補強帯材は、合成樹脂製の主帯材の裏側部（製管されたとき外周側を向く側部）のリブ間に嵌め込まれていてもよく、主帯材のリブ等の内部に埋め込まれていてもよい。 Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for configurations that overlap with the above-described embodiments, and the description thereof will be omitted.
<Second Embodiment>
FIG. 3 shows a second embodiment of the present invention.
In the second embodiment, the rehabilitation tube 3B has high rigidity. That is, it has a rigidity that does not buckle due to the pressure from the backfilling material 2 at the time of filling. Specifically, although detailed illustration is omitted, the band-shaped member (profile) to be the spiral tubular rehabilitation tube 3B is a main band material made of synthetic resin such as polyvinyl chloride and a reinforcing band made of metal such as steel. It has a material, and the rigidity of the band-shaped member and thus the rehabilitation pipe 3B is enhanced by the reinforcing band material. The reinforcing strip may be fitted between the ribs on the back side of the main strip made of synthetic resin (the side facing the outer peripheral side when piped), and is embedded inside the ribs of the main strip. May be.

第２実施形態の支保装置４Ｂは、底部腹起し１２Ｂと、支保材２０Ｂと、ジャッキ３０（突張力付与手段）を備えている。
支保材２０Ｂは、例えば円筒形の鋼管によって構成されている。支保材２０Ｂの長さは、更生管３Ｂの半径より大きく、かつ更生管３Ｂの直径より少し小さい。該支保材２０Ｂが、底部腹起し１２Ｂ上に鉛直に立設され、柱状の支保を構成している。支保材２０Ｂの上端部は、更生管３Ｂの頂部の貫通穴３ｃを貫通している。支保材２０Ｂの少なくとも上端部は貫通孔３ｃより少し小径である。 The support device 4B of the second embodiment includes a bottom abdomen 12B, a support material 20B, and a jack 30 (protrusion tension applying means).
The support material 20B is composed of, for example, a cylindrical steel pipe. The length of the support material 20B is larger than the radius of the rehabilitation pipe 3B and slightly smaller than the diameter of the rehabilitation pipe 3B. The support material 20B is vertically erected on the bottom abdomen 12B to form a columnar support. The upper end of the support material 20B penetrates through the through hole 3c at the top of the rehabilitation pipe 3B. At least the upper end of the support material 20B has a diameter slightly smaller than that of the through hole 3c.

支保材２０Ｂと底部腹起し１２Ｂとの間にジャッキ３０が介在されている。ジャッキ３０は、ベース部材３１と、軸部材３２と、昇降部材３３とを有している。ベース部材３１は、断面コ字状に形成され、底部腹起し１２Ｂに被さるとともに、該底部腹起し１２Ｂの両側面に宛がわれることによって、底部腹起し１２Ｂに回転不能に係止されている。 A jack 30 is interposed between the support material 20B and the bottom abdomen 12B. The jack 30 has a base member 31, a shaft member 32, and an elevating member 33. The base member 31 is formed in a U-shaped cross section, covers the bottom abdomen 12B, and is addressed to both sides of the bottom abdomen 12B, so that the base member 31 is non-rotatably locked to the bottom abdomen 12B. ing.

ベース部材３１には雄ネジ状の軸部材３２が鉛直に立設されている。軸部材３２にナット状の昇降部材３３が螺合されている。昇降部材３３は、回転されることで軸部材３２に沿って昇降される。昇降部材３３には、回転操作用の取っ手３４が設けられている。
支保材２０Ｂの下端が昇降部材３３に突き当てられている。ひいては、支保材２０Ｂの下端が、ジャッキ３０を介して底部腹起し１２Ｂに突き当てられている。
昇降部材３３の昇降に伴って支保材２０Ｂが昇降される。ジャッキ３０及び底部腹起し１２Ｂによって、支保材２０Ｂを昇降可能に保持する支保本体１０Ｂが構成されている。 A male screw-shaped shaft member 32 is vertically erected on the base member 31. A nut-shaped elevating member 33 is screwed into the shaft member 32. The elevating member 33 is rotated to elevate and elevate along the shaft member 32. The elevating member 33 is provided with a handle 34 for rotation operation.
The lower end of the support material 20B is abutted against the elevating member 33. As a result, the lower end of the support material 20B is raised from the bottom abdomen via the jack 30 and is abutted against the 12B.
The support material 20B is moved up and down as the raising and lowering member 33 moves up and down. The jack 30 and the bottom abdomen 12B constitute a support main body 10B that holds the support material 20B up and down.

支保装置４Ｂは次のように使用される。
更生管３Ｂを既設管１の内周に沿って構築後、更生管３Ｂ内の底部に支保装置４Ｂを設置する。
該底部腹起し１２Ｂ上にジャッキ３０を介して支保材２０Ｂを立設する。詳しくは、まずジャッキ３０のコ字状のベース部材３１を底部腹起し１２Ｂに載せる。
好ましくは、昇降部材３３は下降させておく。該昇降部材３３に支保材２０Ｂの下端部を載せる。
支保材２０Ｂの上側部分２１にはシート４０を被せる。
更生管３Ｂの頂部には予め貫通穴３ｃを形成しておく。 The support device 4B is used as follows.
After constructing the rehabilitation pipe 3B along the inner circumference of the existing pipe 1, the support device 4B is installed at the bottom of the rehabilitation pipe 3B.
A support material 20B is erected on the bottom abdomen 12B via a jack 30. Specifically, first, the U-shaped base member 31 of the jack 30 is raised at the bottom and placed on 12B.
Preferably, the elevating member 33 is lowered. The lower end portion of the support material 20B is placed on the elevating member 33.
A sheet 40 is put on the upper portion 21 of the support material 20B.
A through hole 3c is formed in advance at the top of the rehabilitation tube 3B.

更に、取っ手３４で昇降部材３３を上昇方向へ回すことで、支保材２０Ｂを上昇させる。これによって、図３に示すように、支保材２０Ｂの上側部分２１及びシート４０を貫通穴３ｃから管間隙間１ｄに挿し入れ、支保材２０Ｂの上端部をシート４０を介して既設管１の頂部に突き当てる。ベース部材３１が底部腹起し１２Ｂの回転不能に係止されているために、昇降部材３３を回す際にベース部材３１が回転することが無く、昇降操作を安定的に行なうことができる。また、支保材２０Ｂの直径を貫通孔３ｃより小径にしておくことによって、支保材２０Ｂの上側部分２１を貫通孔３ｃに簡単に通すことができる。つまり、支保材２０Ｂを高剛性の更生管３Ｂの貫通孔３ｃに圧入する必要が無い。 Further, the support member 20B is raised by turning the elevating member 33 in the ascending direction with the handle 34. As a result, as shown in FIG. 3, the upper portion 21 of the support material 20B and the sheet 40 are inserted into the inter-pipe gap 1d from the through hole 3c, and the upper end portion of the support material 20B is passed through the sheet 40 to the top of the existing pipe 1. Butt to. Since the base member 31 is locked so that the bottom of the abdomen is raised so that the 12B cannot rotate, the base member 31 does not rotate when the elevating member 33 is rotated, and the elevating operation can be stably performed. Further, by making the diameter of the support material 20B smaller than that of the through hole 3c, the upper portion 21 of the support material 20B can be easily passed through the through hole 3c. That is, it is not necessary to press-fit the support material 20B into the through hole 3c of the highly rigid rehabilitation pipe 3B.

更に昇降部材３３を締め付けることで、支保材２０Ｂを既設管１の頂部と底部腹起し１２Ｂとの間で突っ張らせる。すなわち、ジャッキ３０（突張力付与手段）によって支保材２０Ｂに突っ張り力を付与する。この突っ張り力によって、更生管３Ｂの底部が既設管１の底部に押し付けられる。
その後、管間隙間１ｄにセメントミルクやモルタルなどの裏込め材を充填する。このとき、更生管３Ｂは裏込め材から浮力を受ける。一方、支保材２０Ｂを突っ張らせておくことで、更生管３Ｂが前記浮力によって浮き上がるのを防止できる。
また、更生管３Ｂは裏込め材の注入圧を受ける。一方、更生管３Ｂは、高剛性であるために前記注入圧で座屈することがない。したがって、前記注入圧に対抗する機構を別途設けたり、支保装置４Ｂに付加したりする必要がない。 Further, by tightening the elevating member 33, the support material 20B is stretched between the top and bottom of the existing pipe 1 and the bottom abdomen 12B. That is, the tensioning force is applied to the support material 20B by the jack 30 (protrusion tension applying means). By this tensioning force, the bottom portion of the rehabilitation pipe 3B is pressed against the bottom portion of the existing pipe 1.
After that, the gap 1d between the pipes is filled with a backfilling material such as cement milk or mortar. At this time, the rehabilitation pipe 3B receives buoyancy from the backfill material. On the other hand, by stretching the support material 20B, it is possible to prevent the rehabilitation pipe 3B from floating due to the buoyancy.
Further, the rehabilitation tube 3B receives the injection pressure of the backfill material. On the other hand, since the rehabilitation tube 3B has high rigidity, it does not buckle due to the injection pressure. Therefore, it is not necessary to separately provide a mechanism for countering the injection pressure or to add it to the support device 4B.

第２実施形態の支保装置４Ｂは、更生管３Ｂの浮上防止機能を有していればよく、更生管３Ｂの断面保持機能を有している必要がない。このため、支保装置４Ｂは、構造が簡素であり容易に短時間で設置でき、設置作業性が良好である。ジャッキ３０は人力で操作でき、駆動源や特殊な治具無しで、支保材２０Ｂの昇降及び突っ張り操作を行なうことができる。 The support device 4B of the second embodiment may have a floating prevention function of the rehabilitation pipe 3B, and does not need to have a cross-section holding function of the rehabilitation pipe 3B. Therefore, the support device 4B has a simple structure, can be easily installed in a short time, and has good installation workability. The jack 30 can be operated manually, and the support material 20B can be raised and lowered and the tensioning operation can be performed without a drive source or a special jig.

裏込め材の養生、硬化後、昇降部材３３を下降するように回し、支保材２０Ｂを下降させて、支保材２０Ｂの上側部分２１を貫通孔３ｃから下方へ引き抜く。これによって、支保材２０Ｂを更生管３Ｂから解放できる。その後、支保装置４Ｂを分解して撤去したり、次の施工スパンへ移設したりできる。支保装置４Ｂは構造が簡素であるために、分解、撤去、移設が容易である。 After curing and curing the backfill material, the elevating member 33 is turned so as to descend, the support material 20B is lowered, and the upper portion 21 of the support material 20B is pulled out downward from the through hole 3c. As a result, the support material 20B can be released from the rehabilitation pipe 3B. After that, the support device 4B can be disassembled and removed, or moved to the next construction span. Since the support device 4B has a simple structure, it can be easily disassembled, removed, and relocated.

＜第３実施形態＞
図４及び図５は、本発明の第３実施形態を示したものである。
図４に示すように、第３実施形態においては、第２実施形態（図３）と同様の支保装置４Ｂにおける、支保材２０Ｂの上側部分２１にテーパ部２１ｆ（引抜容易化手段）が形成されている。テーパ部２１ｆは、支保材２０Ｂの上端へ向かって縮径されている。
工場での支保材２０Ｂの製造時にテーパ部２１ｆを形成してもよく、既設管１の更生施工現場においてストレートな単管などの先端部をグラインダーで削ったりハンマーで叩いて凹ませたりすることでテーパ部２１ｆを形成してもよい。 <Third Embodiment>
4 and 5 show a third embodiment of the present invention.
As shown in FIG. 4, in the third embodiment, the tapered portion 21f (pull-out facilitating means) is formed on the upper portion 21 of the support material 20B in the support device 4B similar to the second embodiment (FIG. 3). ing. The diameter of the tapered portion 21f is reduced toward the upper end of the support material 20B.
The tapered portion 21f may be formed at the time of manufacturing the support material 20B at the factory. The tapered portion 21f may be formed.

さらに、図５に示すように、テーパ部２１ｆを含む上側部分２１の外周面は、離型剤４３（引抜容易化手段）によって被覆されている。離型剤４３としては、グリス、潤滑油などが用いられている。 Further, as shown in FIG. 5, the outer peripheral surface of the upper portion 21 including the tapered portion 21f is covered with a mold release agent 43 (pull-out facilitating means). As the release agent 43, grease, lubricating oil and the like are used.

管間隙間１ｄに裏込め材２を充填すると、支保材２０Ｂの表面の離型剤４３が裏込め材２と接する。これによって、支保材２０Ｂと裏込め材２とが接合されるのを阻止できる。或いは接合されたとしても簡単に剥離可能（接合解除可能）な状態になる。しかも、上側部分２１をテーパ部２１ｆとすることによって、裏込め材２の硬化後、裏込め材２と支保材２０Ｂとの接合を一層解除しやすくなる。したがって、支保材２０Ｂを簡単に下方へ引き抜くことができる。 When the backfill material 2 is filled in the gap 1d between pipes, the mold release agent 43 on the surface of the support material 20B comes into contact with the backfill material 2. As a result, it is possible to prevent the support material 20B and the backfill material 2 from being joined. Alternatively, even if they are joined, they can be easily peeled off (joined and released). Moreover, by making the upper portion 21 a tapered portion 21f, it becomes easier to release the joint between the backfilling material 2 and the support material 20B after the backfilling material 2 is cured. Therefore, the support material 20B can be easily pulled out downward.

本発明は、前記実施形態に限定されるものではなく、その趣旨を逸脱しない範囲において種々の改変をなすことができる。
例えば、第３実施形態（図４）を第１実施形態（図１～図２）と同様の支保装置４に適用してもよい。
第１、第２実施形態（図１～図３）において、支保材２０，２０Ｂの上側部分２１に第３実施形態（図４）と同様のテーパ部２１ｆを形成し、かつ柔軟シート４０を被せてもよい。
第１、第２実施形態（図１～図３）において、支保材２０，２０Ｂの上側部分２１に第３実施形態（図４）と同様の離型剤４３を塗布し、かつ柔軟シート４０を被せてもよい。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the third embodiment (FIG. 4) may be applied to the same support device 4 as the first embodiment (FIGS. 1 to 2).
In the first and second embodiments (FIGS. 1 to 3), the tapered portion 21f similar to that in the third embodiment (FIG. 4) is formed on the upper portion 21 of the support materials 20 and 20B, and the flexible sheet 40 is covered with the support material 20 and 20B. May be.
In the first and second embodiments (FIGS. 1 to 3), the release agent 43 similar to that in the third embodiment (FIG. 4) is applied to the upper portion 21 of the support materials 20 and 20B, and the flexible sheet 40 is applied. You may cover it.

本発明は、例えば老朽化した下水道管の更生に適用できる。 The present invention can be applied to, for example, rehabilitation of an aged sewer pipe.

１ 既設管
１ｄ 管間隙間
２ 裏込め材
３ 更生管
３Ｂ 高剛性更生管
３ｃ 貫通孔
４，４Ｂ 支保装置
１０，１０Ｂ 支保本体
１１ フレーム
１２ 腹起し
１２Ｂ 底部腹起し
２０，２０Ｂ 支保材
２１ 上側部分
２１ｆ テーパ部（引抜容易化手段）
３０ ジャッキ（突張力付与手段）
４０ シート（引抜容易化手段）
４３ 離型剤（引抜容易化手段） 1 Existing pipe 1d Gap between pipes 2 Backfill material 3 Rehabilitation pipe 3B High-rigidity rehabilitation pipe 3c Through hole 4, 4B Support device 10, 10B Support body 11 Frame 12 Abdominal up 12B Bottom abdomen 20, 20B Support material 21 Upper side Part 21f Tapered part (means for facilitating pulling out)
30 Jack (means for applying thrust tension)
40 sheets (means for facilitating withdrawal)
43 Release agent (means for facilitating withdrawal)

Claims (4)

既設管の内周に沿う更生管と前記既設管との間に裏込め材を充填する際に前記更生管に設置される支保装置であって、
前記更生管の周方向に間隔を置いて複数配置されるか又は前記更生管の少なくとも下側部に配置された腹起しを有して、前記更生管の内部に設けられた支保本体と、
前記支保本体に昇降可能に支持されるとともに、前記更生管の頂部に形成された貫通孔を貫通して前記既設管の頂部に突き当てられる支保材と、
前記支保材の上側部分に設けられ、前記裏込め材と前記支保材との接合を阻止又は解除する引抜容易化手段と、
を備え、前記引抜容易化手段が、前記支保材における前記上側部分の上端面及び周側面に被せられた柔軟なシートを含み、
前記支保材の前記上側部分の外周面と前記貫通孔の内周面との間の隙間が、前記シートによって塞がれることを特徴とする支保装置。 A support device installed in the rehabilitation pipe when filling a backfill material between the rehabilitation pipe along the inner circumference of the existing pipe and the existing pipe.
A support body provided inside the rehabilitation tube, having a plurality of arrangements at intervals in the circumferential direction of the rehabilitation tube or having an abdomen arranged at least on the lower side of the rehabilitation tube.
A support material that is supported by the support body so as to be able to move up and down, and that penetrates a through hole formed in the top of the rehabilitation pipe and is abutted against the top of the existing pipe.
A pull-out facilitating means provided on the upper portion of the support material to prevent or release the joint between the backfill material and the support material.
The pull-out facilitation means includes a flexible sheet covered on the upper end surface and the peripheral side surface of the upper portion of the support material.
A support device characterized in that a gap between an outer peripheral surface of the upper portion of the support material and an inner peripheral surface of the through hole is closed by the sheet . 前記シートの一部が、前記貫通孔の内周面と前記支保材との間を通して前記更生管の内部に出ることを特徴とする請求項１に記載の支保装置。 The support device according to claim 1 , wherein a part of the sheet goes out to the inside of the rehabilitation pipe through between the inner peripheral surface of the through hole and the support material. 前記引抜容易化手段が、前記支保材における前記上側部分に被覆された離型剤を含むことを特徴とする請求項１又は２に記載の支保装置。 The support device according to claim 1 or 2 , wherein the pull-out facilitating means includes a mold release agent coated on the upper portion of the support material. 前記支保材における前記上側部分が、上端へ向かって縮径するテーパ部となっていることを特徴とする請求項１～３の何れか１項に記載の支保装置。 The support device according to any one of claims 1 to 3 , wherein the upper portion of the support material is a tapered portion whose diameter is reduced toward the upper end.
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JP2016125274A (en) 2015-01-05 2016-07-11 足立建設工業株式会社 Timbering device for lining pipe in sewer, and construction method for timbering

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JPH07138946A (en) * 1993-11-12 1995-05-30 Fujita Corp Pile head reinforcement curing method for cast-in-place pile and treatment method therefor
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