JPH02194928A - Engineering method for lining existing pipe - Google Patents
Engineering method for lining existing pipeInfo
- Publication number
- JPH02194928A JPH02194928A JP1552389A JP1552389A JPH02194928A JP H02194928 A JPH02194928 A JP H02194928A JP 1552389 A JP1552389 A JP 1552389A JP 1552389 A JP1552389 A JP 1552389A JP H02194928 A JPH02194928 A JP H02194928A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- band
- existing
- existing pipe
- spiral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012407 engineering method Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 239000006260 foam Substances 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 15
- 239000000945 filler Substances 0.000 abstract description 6
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 22
- 238000005187 foaming Methods 0.000 description 14
- 239000000758 substrate Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、老朽化した既設管を更生する際に実施される
既設管のライニング工法に関する。さらに詳述すれば2
合成樹脂製の帯状体を螺旋状に巻回して製造される螺旋
管を製造しつつ、直接既設管内に挿入して、挿入された
螺旋管にて既設管をライニングする既設管のライニング
工法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lining method for existing pipes that is carried out when rehabilitating aging existing pipes. To be more detailed, 2
This invention relates to a method for lining an existing pipe, in which a helical pipe is manufactured by spirally winding a synthetic resin band, and the pipe is directly inserted into the existing pipe to line the existing pipe with the inserted helical pipe.
(従来の技術) 上水道や下水道として使用される埋設管には。(Conventional technology) For buried pipes used for water supply and sewerage.
古くから金属管やヒユーム管が採用されている。Metal pipes and Huyum pipes have been used since ancient times.
このような埋設管は、長期の使用によって老朽化し1割
れや腐蝕により漏水するおそれがある。このため、最近
では、老朽化した埋設管等の既設管内に合成樹脂製の管
を挿入してライニングすることが行われている。Such buried pipes become obsolete after long-term use, and there is a risk that water may leak due to cracks or corrosion. For this reason, recently, synthetic resin pipes are inserted into existing pipes such as aged buried pipes to line them.
既設管のライニング工法の一つに1合成樹脂製の帯状体
を螺旋状に巻回することにより製造される螺旋管により
既設管をライニングする方法がある。この方法は1例え
ば特開昭61−48690号公報に開示されている。該
公報に開示された方法は、既設管の端部開口に対向する
ように、螺旋管を製造し得る製管機を設置して実施され
る。該製管機には、各側縁部同士が相互に係合し得る合
成樹脂製の帯状体が順次供給され、製管機は該帯状体を
螺旋状に巻回すると共に、その巻回により相互に隣り合
った帯状体の側縁部同士を係合させることにより、順次
螺旋管を製造する。製造される螺旋管は回転しつつ、製
管機より順次導出される。そして、該製管機から導出さ
れる螺旋管は、直接、既設管内へ導入され、該既設管内
を回転しつつ推進される。既設管の略全域にわたって螺
旋管が挿入されると、該螺旋管と既設管との間にセメン
トモルタル等の裏込め剤が充填されて該螺旋管が既設管
内に固定される。これにより、既設管が該螺旋管にてラ
イニングされる。One of the methods for lining existing pipes is a method of lining existing pipes with a spiral pipe manufactured by spirally winding a band-shaped body made of synthetic resin. This method is disclosed in, for example, Japanese Patent Laid-Open No. 61-48690. The method disclosed in this publication is carried out by installing a pipe making machine capable of manufacturing a spiral pipe so as to face the end opening of the existing pipe. The pipe-making machine is sequentially supplied with synthetic resin strips whose side edges can engage with each other, and the pipe-making machine winds the strips in a helical manner, and by the winding. A helical tube is sequentially manufactured by engaging the side edges of adjacent strips. The manufactured spiral tubes are sequentially guided out of the tube making machine while rotating. Then, the spiral pipe led out from the pipe making machine is directly introduced into the existing pipe and is propelled while rotating within the existing pipe. When the spiral pipe is inserted over substantially the entire area of the existing pipe, a backfilling agent such as cement mortar is filled between the spiral pipe and the existing pipe to fix the spiral pipe within the existing pipe. As a result, the existing pipe is lined with the spiral pipe.
螺旋管とされる帯状体としては、ポリ塩化ビニル。ポリ
エチレン、ポリプロピレン等の可撓性を有する合成樹脂
が用いられる。該帯状体は9通常。The belt-shaped body considered to be a spiral tube is made of polyvinyl chloride. Flexible synthetic resins such as polyethylene and polypropylene are used. The band is usually 9.
一方の側縁部に凸条が長手方向に連続的に設けられてお
り、他方の側縁部には、該凸条が係合し得る凹溝が長手
方向に連続的に設けられている。そして9該帯状体が螺
旋状に巻回された場合に、相互に隣り合う帯状体の側縁
部の凸条と凹溝が嵌合されて、螺旋管とされる。A protruding strip is continuously provided in the longitudinal direction on one side edge, and a groove that can be engaged with the protruding strip is continuously provided on the other side edge in the longitudinal direction. When the strip is wound spirally, the protrusions and grooves on the side edges of adjacent strips fit together to form a spiral tube.
(発明が解決しようとする課題)
このようなライニング工法では、既設管内に挿入された
螺旋管は1回転しつつ該既設管内を推進する。そして、
既設管内に螺旋管が挿入されると9既設管と螺旋管との
間にセメントモルタル等の裏込め剤を充填して、螺旋管
は既設管に固定される。(Problems to be Solved by the Invention) In such a lining method, a spiral pipe inserted into an existing pipe is propelled through the existing pipe while rotating once. and,
When the spiral pipe is inserted into the existing pipe, a backfilling agent such as cement mortar is filled between the existing pipe and the spiral pipe, and the spiral pipe is fixed to the existing pipe.
このような裏込め材の充填作業は、螺旋管が既設管に完
全に挿入された状態で行われるため1作業性が悪く、長
時間を要する。しかも、長尺の既設管の場合には、その
長手方向の中央部にまで裏込め剤を充填することが容易
ではない。かかる問題点を解決することを目的とした施
工方法が特開昭63−194029号公報に開示されて
いる。上記公報に開示された施工方法において使用され
ている発泡性合成樹脂は、ポリオール成分とイソシアネ
ート成分からなる2液温合型の発泡性合成樹脂である。The filling operation with such backfilling material is performed with the spiral pipe completely inserted into the existing pipe, so the work efficiency is poor and it takes a long time. Moreover, in the case of a long existing pipe, it is not easy to fill the backfilling agent up to the longitudinal center of the pipe. A construction method aimed at solving this problem is disclosed in Japanese Patent Laid-Open No. 194029/1983. The foamable synthetic resin used in the construction method disclosed in the above-mentioned publication is a two-component thermally heated foamable synthetic resin consisting of a polyol component and an isocyanate component.
しかしながら22液温合型の発泡ポリウレタンは。However, 22-liquid heating foam polyurethane.
既設管路内の雰囲気温度が15℃前後と低温の場合には
1発泡を開始するまでの時間が60〜100分間と比較
的長いので、螺旋管を製造する際にはさほど支障はない
が、既設管路内の雰囲気温度が30℃以上である場合に
は、2液を混合することにより発生ずる化学反応がその
高温度により著しく促進され9発泡遅延剤を混合したと
しても2液を混合してから発泡を開始するまでの時間が
約20分と短かくなるので、螺旋管を推進している途中
で発泡性合成樹脂が発泡してしまい、既設管の全域にわ
たって螺旋管を挿入できないという問題点があった。つ
まり、下水管路の場合、マンホール間は約50mもあり
、このような長さの1スパンに螺旋管を製造しつつ挿入
するには1通常約30〜40分の作業時間を要するので
、安全率を考慮して発泡開示時間が100分以上の発泡
性合成樹脂でないと夏場の高温度条件下では実際には使
用できないという問題点があった。If the ambient temperature in the existing pipe is low, around 15°C, the time it takes to start one foaming process is relatively long, 60 to 100 minutes, so this does not pose much of a problem when manufacturing spiral pipes. If the ambient temperature in the existing pipeline is 30°C or higher, the chemical reaction that occurs when the two liquids are mixed will be significantly accelerated by the high temperature, so even if a foaming retardant is mixed, the two liquids will not be mixed. Since the time from when the helical tube is moved until the foaming starts is short, about 20 minutes, the foamable synthetic resin foams while the helical tube is being propelled, making it impossible to insert the helical tube throughout the entire area of the existing tube. There was a point. In other words, in the case of sewage pipes, the distance between manholes is about 50 meters, and it usually takes about 30 to 40 minutes to manufacture and insert a spiral pipe into one span of such length, so it is not safe. There is a problem in that unless a foamable synthetic resin has a foaming time of 100 minutes or more in consideration of the foaming rate, it cannot actually be used under high temperature conditions in the summer.
本発明は、上記従来の問題に鑑み、地下に埋設されてい
る既設管という非常に高温度の作業条件を利用すること
に着目してなされたものであり。The present invention has been made in view of the above-mentioned conventional problems by focusing on utilizing the extremely high temperature working conditions of existing pipes buried underground.
その目的は、既設管と螺旋管との間の全体に裏込め剤を
充填することができ、しかも工期を著しく短縮し得る既
設管のライニング工法を提供することにある。The purpose is to provide a method for lining an existing pipe, which can fill the entire space between the existing pipe and the spiral pipe with a backfilling agent, and which can significantly shorten the construction period.
(課題を解決するための手段)
本発明の既設管のライニング工法は、各側縁部が相互に
係合し得る合成樹脂製の帯状体を螺旋状に巻回する工程
と、その巻回により相互に隣り合った帯状体の側縁部同
士を係合させて螺旋管を製造する工程と、製造された螺
旋管の外周面に沿わせて水分により発泡硬化するI液型
発泡性ウレタン樹脂からなる裏込め剤を順次配設する工
程と。(Means for Solving the Problems) The lining method for existing pipes of the present invention includes the steps of spirally winding a synthetic resin strip whose side edges can engage with each other, and A process of manufacturing a helical tube by engaging the side edges of adjacent strips, and an I-liquid type foamable urethane resin that foams and hardens with moisture along the outer circumferential surface of the manufactured helical tube. and a process of sequentially disposing backfilling agents.
製造された螺旋管を既設管内に順次挿入して、挿入され
た螺旋管を既設管内に推進させる工程、を包含してなり
、そのことにより上記目的が達成される。The method includes a step of sequentially inserting the manufactured helical tubes into an existing pipe and propelling the inserted helical tubes into the existing pipe, thereby achieving the above object.
(実施例) 以下に本発明を実施例について説明する。(Example) The present invention will be described below with reference to Examples.
本発明の既設管のライニング工法は1例えば。For example, the method for lining existing pipes according to the present invention is as follows.
第1図に示すように、既設管であるコンクリート製の下
水管81を更生する際に実施される。本発明方法は、ま
ず、ドラム1から繰り出される合成樹脂製の帯状体10
を、製管機20により螺旋管10°とする。該製管機2
0は、下水管81の一端部が接続されたマンホール82
内に設置されており、製管された螺旋管10゛ は、順
次下水管81内に挿入される。As shown in FIG. 1, this is carried out when rehabilitating an existing concrete sewer pipe 81. The method of the present invention begins with a synthetic resin strip 10 that is unwound from a drum 1.
is made into a spiral tube of 10° using the pipe making machine 20. The pipe making machine 2
0 is a manhole 82 to which one end of the sewer pipe 81 is connected.
The spiral pipes 10' that have been installed inside and made into pipes are sequentially inserted into the sewer pipe 81.
螺旋管10′ は、底部を除いて下水管81内周面に接
触しない程度の外径とされる。The spiral pipe 10' has an outer diameter such that it does not come into contact with the inner circumferential surface of the sewer pipe 81 except at the bottom.
本発明方法に使用される帯状体10は1例えば第2図に
示すような断面形状をしている。該帯状体10ハ、ポリ
塩化ビニル、ポリエチレン、ポリプロピレン、ポリカー
ボネート、ポリエステル、あるいはこれらの樹脂をガラ
ス繊維で補強した樹脂等により成形されている。該帯状
体10は、帯板状の基板12を有する。該基板12の一
方の側縁部の一面には、係合リブ13が長手方向に連続
して設けられている。該基板12の他方の側縁部の同じ
面には。The strip 10 used in the method of the present invention has a cross-sectional shape, for example, as shown in FIG. The strip 10 is molded from polyvinyl chloride, polyethylene, polypropylene, polycarbonate, polyester, or a resin obtained by reinforcing these resins with glass fiber. The strip-shaped body 10 has a strip-shaped substrate 12 . An engagement rib 13 is provided continuously in the longitudinal direction on one side edge of the substrate 12 . On the same side of the other side edge of the substrate 12.
該基板12に対して直立した状態となったソケット14
が長手方向に連続して設けられている。The socket 14 is in an upright state with respect to the board 12.
are provided continuously in the longitudinal direction.
係合リブ13は基板12から直立した直立部13aと。The engagement rib 13 has an upright portion 13a that stands upright from the substrate 12.
該直立部13aの先端に設けられた断面円形状の係合部
13 bとから構成されている。The engagement portion 13b has a circular cross section and is provided at the tip of the upright portion 13a.
ソケット14は前記係合リブ13を内部に嵌合し得る形
状をしており、基板12における該ソケット14が配設
された部分は、係合リブ13配設側の側縁部が嵌太し得
るように、基板12の厚さ分だけ、ソケット14配設側
へ段落ちしている。該ソケット14の内部形状は係合リ
ブ13の外形形状にほぼ一致するように形成されている
。ソケット140基端邪には。The socket 14 has a shape that allows the engagement rib 13 to fit therein, and the portion of the board 12 where the socket 14 is disposed has a side edge on the side where the engagement rib 13 is disposed. In order to achieve this, there is a step down to the side where the socket 14 is disposed by the thickness of the board 12. The internal shape of the socket 14 is formed to approximately match the external shape of the engaging rib 13. Socket 140 base end.
該基端部より外方へ、基板12の厚さ分だけ段落ちした
当接部17が連設されており、該当接部17には。A contact portion 17 stepped down by the thickness of the substrate 12 is continuously provided outward from the base end portion.
外側の斜め上方へ延出する傾斜リブ15が、長手方向に
連続して設けられている。An inclined rib 15 extending diagonally upward on the outside is provided continuously in the longitudinal direction.
基板12の係合リブ13とソケット14との間には。between the engagement rib 13 of the board 12 and the socket 14.
長手方向に連続する複数の補強用リブ16.1.6.・
・・が所定の間隔をあけて設けられている。各補強用リ
ブ16は基板12に対し2て直立状態となった直立部1
6aと、該直立R16aの先端に設けられたフランジ部
16bとでなる断面T字状をしている。A plurality of longitudinally continuous reinforcing ribs 16.1.6.・
... are provided at predetermined intervals. Each reinforcing rib 16 has an upright portion 1 that stands upright with respect to the substrate 12.
6a and a flange portion 16b provided at the tip of the upright R16a, which has a T-shaped cross section.
前記傾斜リブ15の先端は、基板12を螺旋状に巻いて
ソケット14内に係合リブ13を嵌合させた場合に、係
合リブ13の隣に位置する補強用リブ16のフランジ部
16bに係止され、同時に当接部17は、基板12に当
接される。When the substrate 12 is wound spirally and the engagement rib 13 is fitted into the socket 14, the tip of the inclined rib 15 touches the flange portion 16b of the reinforcing rib 16 located next to the engagement rib 13. At the same time, the contact portion 17 is brought into contact with the substrate 12.
このような帯状体10は、マンホール82内に設置され
た製管機20により螺旋管10°とされる。製管機20
は、該製管機20内に導入される帯状体10を。Such a band-shaped body 10 is made into a spiral pipe of 10° by a pipe making machine 20 installed in the manhole 82. Pipe making machine 20
refers to the band-shaped body 10 introduced into the pipe making machine 20.
所定の螺旋角を有して円筒周面上に配設された製管ロー
ラ21により強制的に屈曲して、該帯状体10を螺旋状
に巻回する。そして1第3図に示すように、螺旋状に巻
回された帯状体10のソケット14内に、新たに製管F
f&20内に導入される帯状体10の係合リブ13が嵌
合されて、相互に隣り合う帯状体10の側縁部同士が係
合される。このとき7 ソケット14に連設された傾斜
リブ15が、補強リブ16のフランジ部16bに係止さ
れるとともに、当接部17が基板12の係合リブ13と
補強リブ16との間の部分に重ね合わされる。The band 10 is forcibly bent by a pipe forming roller 21 disposed on the cylindrical circumferential surface with a predetermined helical angle to wind the band 10 in a spiral shape. 1. As shown in FIG.
The engaging ribs 13 of the strip-like bodies 10 introduced into the f&20 are fitted, and the side edges of the mutually adjacent strip-like bodies 10 are engaged with each other. At this time 7, the inclined rib 15 connected to the socket 14 is locked to the flange part 16b of the reinforcing rib 16, and the contact part 17 is connected to the part between the engagement rib 13 and the reinforcing rib 16 of the board 12. superimposed on
本発明のライニング工法では、このように、製管機20
にて螺旋状に巻回された帯状体10のソケット14内へ
、新たに製管機20内へ送給される帯状体10の係合リ
ブ13が嵌合された後に、螺旋管10′ とされた帯状
体10における基板12の外周面に、裏込め剤が塗布さ
れる。裏込め剤として用いられる水分により発泡硬化す
る1液型発泡性ウレタン樹脂は2例えば、トリエンジイ
ソシアネート(TD[)とジフエニールメタンジイソシ
アネー) (MDI)との混合物に1発泡遅延剤として
ジオクチルフタレート(DOP)、製泡剤としてシリコ
ン、増粘剤として無水ケイ酸(si02)、および充填
剤としてCa口/5il12を9適当な割合で混合した
ものであり、それぞれの混合割合を適当に変更すること
により、その発泡開始時間および発泡倍率を調整するこ
とができる。In the lining method of the present invention, the pipe making machine 20
After the engagement rib 13 of the strip 10 newly fed into the pipe making machine 20 is fitted into the socket 14 of the strip 10 wound spirally, the helical tube 10' and A backfilling agent is applied to the outer peripheral surface of the substrate 12 in the strip-like body 10. A one-component foamable urethane resin that is foam-cured by moisture and used as a backfilling agent is a mixture of 2, for example, triene diisocyanate (TD[) and diphenylmethane diisocyanate (MDI), and 1 dioctyl as a foaming retardant. It is a mixture of phthalate (DOP), silicon as a foaming agent, silicic anhydride (si02) as a thickener, and Ca/5il12 as a filler at an appropriate ratio, and the mixing ratio of each can be changed appropriately. By doing so, the foaming start time and foaming ratio can be adjusted.
このような、裏込め剤は1第1図に示すように地上に載
置されたタンク31から、注入ホース33を介して、製
管機20により製造された螺旋管10“の外周面に対向
して配設された塗布バット36へ送給され1M塗布バッ
ト36にて螺旋管10゛ の外周面に裏込め剤が塗布さ
れる。As shown in FIG. 1, such backfilling agent is supplied from a tank 31 placed on the ground through an injection hose 33 to the outer circumferential surface of a helical pipe 10'' manufactured by a pipe making machine 20. The 1M coating vat 36 applies the backfilling agent to the outer peripheral surface of the helical tube 10'.
裏込め剤は、螺旋管10’ を構成する帯状体10の基
板に外周面における各補強用リブ16間、および補強用
リブ16とソケット14間に塗布される。その塗布量は
、各補強用リブ16の間および補強用リブ16とソケッ
ト14との間から流出せず、しかも1発泡時に既設管8
1内周面に接触して既設管81と螺旋管10′ との間
隙を充填し得るように設定される。The backfilling agent is applied to the substrate of the strip 10 constituting the helical tube 10' between the reinforcing ribs 16 on the outer peripheral surface and between the reinforcing ribs 16 and the socket 14. The applied amount is such that it does not flow out between each reinforcing rib 16 or between the reinforcing rib 16 and the socket 14, and that it does not leak out from between each reinforcing rib 16 and between the reinforcing rib 16 and the socket 14.
1, so as to be able to contact the inner peripheral surface of the pipe 81 and fill the gap between the existing pipe 81 and the spiral pipe 10'.
該裏込め剤の発泡開始時間は、製管機20により形成さ
れる螺旋管10゛ が既設管81の全長にわたって形成
される時間よりも長いものである。また、該裏込め剤は
、螺旋管10°外周面に塗布された際に波乗れが生じな
いように、増粘剤の混合量を調整することによりチクソ
トロピー性を向上させ、10万cps程度の高粘度とさ
れる。The foaming start time of the backfilling agent is longer than the time required for the spiral pipe 10' to be formed by the pipe making machine 20 over the entire length of the existing pipe 81. In addition, the backfilling agent improves thixotropy by adjusting the amount of thickener mixed so that no wave riding occurs when applied to the 10° outer circumferential surface of the helical tube. Considered to have high viscosity.
このようにして、螺旋管10゛ が製造されると。In this way, the spiral tube 10' is manufactured.
該螺旋管10′ は、製管機20から直接下水管81内
へ挿入される。そして、該螺旋管10°は、下水管81
内を1回転しつつ軸方向に推進される。該螺旋管10°
の推進方向先端が、下水管81の端部に到達すると、製
管機20による螺旋管10゛ の製造が停止される。そ
の後、所定時間が経過すると、螺旋管10゛の外周面に
塗布された発泡性裏込め剤が発泡し。The spiral pipe 10' is inserted directly into the sewer pipe 81 from the pipe making machine 20. The spiral pipe 10° is connected to the sewer pipe 81.
It is propelled in the axial direction while rotating once inside. The spiral tube 10°
When the leading end in the direction of propulsion reaches the end of the sewer pipe 81, the manufacture of the spiral pipe 10' by the pipe making machine 20 is stopped. Thereafter, after a predetermined period of time has elapsed, the foaming backfilling agent applied to the outer peripheral surface of the spiral tube 10' foams.
その発泡体は螺旋管10°と既設管81との間隙内を埋
める。そして、該発泡体により、螺旋管10゛ と既設
管81に固定される。The foam fills the gap between the spiral pipe 10° and the existing pipe 81. The foam is then fixed to the spiral pipe 10' and the existing pipe 81.
裏込め剤は、螺旋管10°の外周面に塗布する構成に限
らず1例えば、裏込め剤が含浸されたガラスロービング
等の線材を、螺旋管10′ における帯状体10の各補
強用リブ16問および補強リブ16とソケット14との
間に巻付けるようにしてもよい。このような構成とする
場合には、第3図に二点鎖線で示すように螺旋管10゛
を構成する帯状体10の基板12における各補強用リプ
16間、補強用リブ16とソケット14との間および当
接部17の背面側に線材41を係止し得る一対の突起1
8を設けてもよい。The backfilling agent is not limited to the configuration in which it is applied to the outer circumferential surface of the helical tube 10°. It may also be wound between the reinforcing rib 16 and the socket 14. In the case of such a configuration, as shown by the two-dot chain line in FIG. A pair of protrusions 1 capable of locking the wire 41 between the two and on the back side of the contact portion 17
8 may be provided.
裏込め剤を含浸する線材41は、第4図に示すように、
製管機20が配設されたマンホール82の近傍の地表に
載置されたドラム42から順次繰り出され。The wire rod 41 impregnated with the backfilling agent is, as shown in FIG.
The pipes are sequentially fed out from a drum 42 placed on the ground near the manhole 82 where the pipe making machine 20 is installed.
例えば前述した1液型の発泡性ウレタン樹脂の液槽43
から混合液が供給される浸漬槽44にて、線材41に発
泡性裏込め剤の混合液が含浸される。この線材41は、
製管機20にて製造された螺旋管10°外周面に巻付け
られる。そして、下水管81内に螺旋管10”が挿通さ
れた後に、所定時間が経過すると。For example, the liquid tank 43 of the one-component foamable urethane resin mentioned above.
The wire rod 41 is impregnated with the foaming backfilling agent mixture in the dipping tank 44 to which the mixture is supplied. This wire 41 is
It is wound around the 10° outer peripheral surface of the helical tube manufactured by the pipe making machine 20. Then, after a predetermined period of time has elapsed after the spiral pipe 10'' was inserted into the sewer pipe 81.
線材41に含浸された裏込め剤が発泡し、その発泡体が
螺旋管10′下水管81との間隙内に充填される。The backfilling agent impregnated into the wire 41 foams, and the foam fills the gap between the spiral pipe 10' and the sewer pipe 81.
以下に、最も好ましい裏込め剤の組成と発泡開示時間を
關ホする。The most preferred backfilling agent composition and foaming onset time are discussed below.
[組成]
トリエンジイソシアネート(TDI)とジフェニールメ
タンジイソシアネート(λ101)との混合物[住人バ
イエルウレタン■製、商品名
5Btl−1socyanate−0631]−−−−
−100重量部
シリコン(製泡剤’) −−−−
−1,5重量部ジオクチルフタレート (発泡遅延剤)
−−−−−60重量部超微粒子無水ケイ酸(増粘剤
’) −−−−−8重量部[発泡開始時間コ
30℃、湿度60%の条件下 −−−−−160分30
℃、湿度80%の条件下 −−−−−120分30℃、
湿度100%の条件下−−−−−110分(発明の効果
)
本発明の既設管のライニング工法は、このように既設管
内に挿入される螺旋管の外周面に沿わせて水分により発
泡硬化する1液型発泡性ウレタン樹脂からなる裏込め剤
を配設しているため、既設管内に螺旋管が挿入されると
、裏込め剤が発泡することにより既設管と螺旋管との間
隙内がその発泡体にて充填される。従って、既設管内に
螺旋管を挿入した後に裏込め剤を充填する必要がなく。[Composition] Mixture of triene diisocyanate (TDI) and diphenylmethane diisocyanate (λ101) [manufactured by Tensei Bayer Urethane ■, trade name 5Btl-1 socyanate-0631] ----
-100 parts by weight silicone (foaming agent') -----
-1.5 parts by weight dioctyl phthalate (foaming retardant)
------60 parts by weight Ultrafine particle silicic anhydride (thickener') ---8 parts by weight [Foaming start time: 30°C and 60% humidity -----160 minutes 30
℃, humidity 80% condition ----120 minutes 30℃,
Under conditions of 100% humidity ---- 110 minutes (effects of the invention) The lining method for existing pipes of the present invention is as described above, in which the lining of a spiral pipe is foamed and hardened by moisture along the outer circumferential surface of the spiral pipe inserted into the existing pipe. Since a backfilling agent made of a one-component foamable urethane resin is installed, when a spiral pipe is inserted into an existing pipe, the backfilling agent foams and the gap between the existing pipe and the spiral pipe is filled. Filled with the foam. Therefore, there is no need to fill the helical pipe with backfilling agent after inserting it into the existing pipe.
工期を著しく短縮し得る。しかも、螺旋管が長尺であり
、かつ夏場の高温度作業条件下においても。The construction period can be significantly shortened. Moreover, the spiral tube is long and can be used under high temperature working conditions in the summer.
該螺旋管と既設管との間の全体にわたって裏込め剤を充
填し得る。A backfilling agent may be filled throughout the space between the helical tube and the existing tube.
第1図は本発明方法の実施工程を示す断面図。
第2図は本発明方法の実施に使用される帯状体の断面図
、第3図はその帯状体にて形成された螺旋管の要部断面
図、第4図は本発明方法の他の実施例における工程を示
す断面図である。FIG. 1 is a sectional view showing the implementation steps of the method of the present invention. FIG. 2 is a sectional view of a strip used in carrying out the method of the present invention, FIG. 3 is a sectional view of a main part of a spiral tube formed from the strip, and FIG. 4 is a sectional view of another embodiment of the method of the present invention. It is a sectional view showing a process in an example.
Claims (1)
螺旋状に巻回する工程と、 その巻回により相互に隣り合った帯状体の側縁部同士を
係合させて螺旋管を製造する工程と、製造された螺旋管
の外周面に沿わせて水分により発泡硬化する1液型発泡
性ウレタン樹脂からなる裏込め剤を順次配設する工程と
、 製造された螺旋管を既設管内に順次挿入して、挿入され
た螺旋管を既設管内に推進させる工程と、を包含する、
既設管のライニング工法。[Claims] 1. A step of spirally winding a synthetic resin band whose side edges can engage with each other; and a step of spirally winding the side edges of the band that are adjacent to each other as a result of the winding. a step of manufacturing a helical tube by engaging them with each other, and a step of sequentially disposing a backfilling agent made of a one-component foamable urethane resin that foams and hardens with moisture along the outer peripheral surface of the manufactured helical tube. , a step of sequentially inserting the manufactured spiral tubes into an existing pipe and propelling the inserted spiral tubes into the existing pipe,
Lining method for existing pipes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1552389A JPH02194928A (en) | 1989-01-25 | 1989-01-25 | Engineering method for lining existing pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1552389A JPH02194928A (en) | 1989-01-25 | 1989-01-25 | Engineering method for lining existing pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02194928A true JPH02194928A (en) | 1990-08-01 |
Family
ID=11891172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1552389A Pending JPH02194928A (en) | 1989-01-25 | 1989-01-25 | Engineering method for lining existing pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02194928A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06315981A (en) * | 1993-05-10 | 1994-11-15 | Sekisui Chem Co Ltd | Strip material for lining existing pipe and production thereof |
WO2002048594A1 (en) * | 2000-12-12 | 2002-06-20 | Adachi Construction Industry Co., Ltd. | Method and device for lining construction in sewer followed by simultaneous filling of back-fill material |
JP2003039552A (en) * | 2001-08-02 | 2003-02-13 | Sekisui Chem Co Ltd | Method for applying intrapipe lining and device for manufacturing lined pipe |
JP2010101114A (en) * | 2008-10-27 | 2010-05-06 | Sekisui Chem Co Ltd | Device for manufacturing regeneration pipe and method for manufacturing regeneration pipe |
JP2010201891A (en) * | 2009-03-06 | 2010-09-16 | Inoac Tokuzai Kk | Method for repairing double tube |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6225186A (en) * | 1985-07-24 | 1987-02-03 | Asahi Denka Kogyo Kk | Low-shrinkable water-swelling sealant |
JPS63194029A (en) * | 1987-02-06 | 1988-08-11 | Tokyo Met Gov Gesuidou Service Kk | Constructing method for backing with lining pipe for underground embedded pipe |
-
1989
- 1989-01-25 JP JP1552389A patent/JPH02194928A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6225186A (en) * | 1985-07-24 | 1987-02-03 | Asahi Denka Kogyo Kk | Low-shrinkable water-swelling sealant |
JPS63194029A (en) * | 1987-02-06 | 1988-08-11 | Tokyo Met Gov Gesuidou Service Kk | Constructing method for backing with lining pipe for underground embedded pipe |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06315981A (en) * | 1993-05-10 | 1994-11-15 | Sekisui Chem Co Ltd | Strip material for lining existing pipe and production thereof |
WO2002048594A1 (en) * | 2000-12-12 | 2002-06-20 | Adachi Construction Industry Co., Ltd. | Method and device for lining construction in sewer followed by simultaneous filling of back-fill material |
AU784066B2 (en) * | 2000-12-12 | 2006-01-19 | Adachi Construction Industry Co., Ltd. | Tubular culvert interior lining method and lining apparatus with simultaneous injection of back-filling material |
US7186060B2 (en) | 2000-12-12 | 2007-03-06 | Adachi Construction Industry Co. Ltd. | Method and device for lining construction in sewer followed by simultaneous filling of back-fill material |
JP2003039552A (en) * | 2001-08-02 | 2003-02-13 | Sekisui Chem Co Ltd | Method for applying intrapipe lining and device for manufacturing lined pipe |
JP4625207B2 (en) * | 2001-08-02 | 2011-02-02 | 積水化学工業株式会社 | In-pipe lining construction method and lining pipe making apparatus used therefor |
JP2010101114A (en) * | 2008-10-27 | 2010-05-06 | Sekisui Chem Co Ltd | Device for manufacturing regeneration pipe and method for manufacturing regeneration pipe |
JP2010201891A (en) * | 2009-03-06 | 2010-09-16 | Inoac Tokuzai Kk | Method for repairing double tube |
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