JPH01171926A - Hard tube lining method of inside of branch pipe part of underground pipe - Google Patents
Hard tube lining method of inside of branch pipe part of underground pipeInfo
- Publication number
- JPH01171926A JPH01171926A JP62332471A JP33247187A JPH01171926A JP H01171926 A JPH01171926 A JP H01171926A JP 62332471 A JP62332471 A JP 62332471A JP 33247187 A JP33247187 A JP 33247187A JP H01171926 A JPH01171926 A JP H01171926A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- branch pipe
- pipe
- hard tube
- lining
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
- 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
本発明は埋設管枝管部内面の硬質チューブライニング工
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hard tube lining method for the inner surface of a branch pipe section of a buried pipe.
従来の技術とその問題点
埋設管枝管部、例えば地下に埋設の下水本管と地表部に
形成の下水溝とを連結する枝管部は、継目部などよりの
地下水浸入防止を目的として、硬質チューブによる内面
ライニングを施すことが望まれる。上記枝管部は、先端
側が下水溝内に開口されているとはいえ、基端側は地下
埋設の本管に接続されているので、内面ライニング施工
の作業口としては片側の先端開口のみとなり、このよう
な片側施工は、非常に困難である。この場合地面を掘削
し、枝管部の基端部を切断し作業口を形成すれば、両側
よりの作業となり施工可能となるが、これでは地面の掘
削と管切断に多大の時間と手数を要することになり、好
ましい解決策ではない。Conventional technology and its problems Buried pipe branch pipes, for example, branch pipes that connect underground sewage main pipes and sewage grooves formed on the surface, are designed to prevent groundwater from entering through joints, etc. It is desirable to provide an inner lining with a hard tube. Although the tip of the above branch pipe opens into the sewer ditch, the base end is connected to the underground main pipe, so only one end of the branch can be opened as a working opening for inner lining construction. , such one-sided construction is extremely difficult. In this case, if the ground is excavated and the proximal end of the branch pipe section is cut to form a work opening, the work can be done from both sides, but this requires a lot of time and effort to excavate the ground and cut the pipe. This is not the preferred solution.
本発明はこのような従来の問題点を一掃することを目的
としてなされたものである。The present invention has been made with the aim of eliminating such conventional problems.
問題点を解決するための手段
本発明は、基端が地下埋設の本管に接続され、先端が実
質的に地上に開口された枝管部内面に硬質チューブライ
ニングを形成するための工法であって、上記枝管部の先
端開口よりその内部に、挿入方向の前端側か実質的に閉
塞され後端側が開口された硬質チューブを前端閉塞部が
本管内部に至るまで挿入する工程、枝管部内に挿入の上
記硬質チューブの後端開口よりその内部に加熱流体を供
給し該チューブを内部より加熱軟化する工程、加熱軟化
状態にある上記チューブを内部より加圧して管半径方向
に拡管し内面ライニングを形成する工程及び内面ライニ
ングの本管内余端を、該本体内を遠隔操作的に管軸方向
に移動される切断装置により切断し除去する工程、を含
むことを特徴とする埋設管枝管部内面の硬質チューブラ
イニング工法に係る。Means for Solving the Problems The present invention is a construction method for forming a hard tube lining on the inner surface of a branch pipe whose base end is connected to an underground main pipe and whose tip is substantially open above ground. a step of inserting a rigid tube whose front end side in the insertion direction is substantially closed and whose rear end side is open from the distal opening of the branch pipe section until the front end closed section reaches the inside of the main pipe; A step of supplying heating fluid to the inside of the hard tube inserted through the rear end opening of the hard tube to heat and soften the tube from the inside, pressurize the tube in the heated and softened state from the inside to expand the tube in the radial direction and inner surface. A buried pipe branch pipe characterized by comprising a step of forming a lining and a step of cutting and removing the remaining end of the inner lining inside the main pipe using a cutting device that is remotely moved in the pipe axis direction within the main body. This relates to the hard tube lining method for the inner surface of the section.
実施例
以下に本発明工法の一実施例を添附図面にもとづき説明
すると次の通りである。EXAMPLE An example of the construction method of the present invention will be described below based on the accompanying drawings.
図面は本発明工法を基端側が地下埋設の下水本管（ａ）
に接続され、先端側が地表部に設置の下水溝（ｂ）（又
は側溝）内に開口された枝管部（Ｃ）の内面ライニング
に適用した場合の一例が示されている。The drawing shows a sewer main (a) with the base end buried underground using the construction method of the present invention.
An example is shown in which the present invention is applied to the inner lining of a branch pipe section (C) connected to the drain pipe section (C) whose tip end side is opened into a sewage ditch (B) (or side ditch) installed on the ground surface.
本発明工法に於て、内面ライニング材としては硬質チュ
ーブ（１）が用いられ、該チューブ（１）は熱可塑性合
成樹脂例えば塩化ビニル樹脂製の硬質管であり、円形断
面を持つように押出し成形されている。円形断面のチュ
ーブ（１）を用いることにより、拡管後に於ても円形断
面を安定確実に保持させることができる。In the method of the present invention, a hard tube (1) is used as the inner lining material, and the tube (1) is a hard tube made of thermoplastic synthetic resin, such as vinyl chloride resin, and is extruded to have a circular cross section. has been done. By using the tube (1) with a circular cross section, the circular cross section can be stably and reliably maintained even after expansion.
チューブ（１）は円形断面を基準にして、枝管部（ｃ）
の内径と略々同一か或はこれより５０％程度を限度とし
て小さい外径を有し、枝管部（Ｃ）への挿通性を考慮し
、通常は第２図に示されるように管半径方向に押し潰さ
れ、略々Ｕ字状の断面形状を呈するように変形加工され
ている。このようにチューブ（１）％ＵＵ字部変形加工
することにより減じられた外径が得られ、枝管部（ｃ）
への挿通性を改善できると共に、合成樹脂の保有弾性と
相俟ってＵ字部が閉じる方向への屈曲性が得ら４れるの
で、枝管部（ｃ）が直線状である場合はもとより、曲が
り部を有するような場合でも支障なく挿入できる。チュ
ーブ（１）の押圧変形加工は通常加熱軟化状態のちとに
行なわれる。The tube (1) has a circular cross section as a reference, and the branch pipe part (c)
It has an outer diameter that is approximately the same as the inner diameter of the pipe, or is smaller than this by up to 50%, and in consideration of the ease of insertion into the branch pipe section (C), the pipe radius is usually set as shown in Figure 2. It is crushed in the direction and deformed so as to have a substantially U-shaped cross-section. In this way, by deforming the tube (1)% UU-shaped part, a reduced outer diameter is obtained, and the branch pipe part (c)
In addition to improving the insertion performance into the U-shaped part, combined with the elasticity of the synthetic resin, flexibility in the direction in which the U-shaped part closes can be obtained (4), not only when the branch pipe part (c) is straight. , it can be inserted without any problem even if it has a curved part. Pressure deformation of the tube (1) is usually carried out after it is heated and softened.
枝管部（Ｃ）への挿入工程前に、外径寸法の減じられた
チューブ（１）の前端に、前後方向に貫通された通孔（
２ａ）を有する前衿（２）が施される。通孔（２ａ）は
チューブ（１）内に供給される加熱流体を前後方向に流
通させながらチューブ（１）を内部加熱するためのもの
であり、またスチーム加熱の場合には通孔（２ａ）を通
じてドレーンを排出できる。Before the insertion process into the branch pipe section (C), a through hole (
A front collar (2) with 2a) is applied. The through hole (2a) is for internally heating the tube (1) while circulating the heating fluid supplied into the tube (1) in the front-rear direction, and in the case of steam heating, the through hole (2a) Drain can be discharged through.
さらに上記チューブ（１）内には、その全長に亘ってバ
ネ線材（３）が挿入される。バネ線材（３）はチューブ
（１）を内部よりバックアップし、チューブ（１）の鋭
角的な折曲を防止し、押込み力を前端まで確実に伝達す
るためのものであり、例えば枝管部（ｃ）が直線状の場
合には省略してもよい。゛バネ線材（３）としては、第
２図に示されるような帯鋼は、チューブ（１）を内部か
ら巾広くバックアップでき、特に好ましい。Furthermore, a spring wire (3) is inserted into the tube (1) over its entire length. The spring wire (3) backs up the tube (1) from the inside, prevents the tube (1) from bending at an acute angle, and reliably transmits the pushing force to the front end. If c) is linear, it may be omitted. As the spring wire (3), a steel band as shown in FIG. 2 is particularly preferable because it can back up the tube (1) widely from the inside.
第１図は枝管部（ｃ）内への硬質チューブ（１）の挿入
工程の状況を示し、この挿入は、枝管部（Ｃ）の先端開
口（ｃｌ）よりの片押しによって行なわれ、この片押し
操作は人手又は適宜の機械的手段の適用により行なわれ
る。FIG. 1 shows the state of the insertion process of the hard tube (1) into the branch pipe part (c), and this insertion is performed by one-sided pushing from the tip opening (cl) of the branch pipe part (C). This single push operation is performed manually or by applying suitable mechanical means.
第３図に示されるように、枝管部（Ｃ）内に挿入の硬質
チューブ（１）の前端が枝管部（Ｃ）の基端開口（Ｃ２
）を通過し、その対向端の本管（ａ）の内壁（ａｌ）に
到達した後は、該チューブ（１）内よりバネ線材（３）
が抜き出し取り除、かれ、枝管部（Ｃ）への硬質チュー
ブ（１）の挿入が終了する。As shown in FIG.
), and after reaching the inner wall (al) of the main pipe (a) at the opposite end, the spring wire (3) is inserted from inside the tube (1).
is pulled out and removed, and the insertion of the rigid tube (1) into the branch pipe section (C) is completed.
枝管部（Ｃ）内への硬質チューブ（１）の挿入を終えた
後は、第４図に示されるように、上記チューブ（１）の
後端に後栓（４）が施され、該栓（４）の供給孔（４ａ
）よりチューブ（１）内に加熱流体例えばスチームが供
給される。チューブ（１）はこのスチームの供給により
内部より加熱加圧され管半径方向に拡管され枝管部（Ｃ
）内面に被着される。チューブ（１）の拡管ひいては枝
管部（Ｃ）内面への被着を終えた後は、チューブ（１）
内の加圧状態を維持したままでスチームを外気と置換し
拡管チューブ（１′）の冷却固化を計ることにより、枝
管部（Ｃ）に硬質チューブ（１）からなる内面ライニン
グを形成できる。After the rigid tube (1) has been inserted into the branch pipe section (C), a rear plug (4) is applied to the rear end of the tube (1) as shown in FIG. Supply hole (4a) of plug (4)
) a heating fluid, for example steam, is supplied into the tube (1). The tube (1) is heated and pressurized from the inside by the supply of steam, expanded in the tube radial direction, and expanded to the branch pipe section (C
) coated on the inner surface. After expanding the tube (1) and finally adhering it to the inner surface of the branch pipe section (C), the tube (1)
By replacing the steam with outside air while maintaining the pressurized state inside, and cooling and solidifying the expanded tube (1'), an inner lining made of the hard tube (1) can be formed in the branch pipe section (C).
第６図に詳細が示されるように、内面ライニングの形成
時点では、チューブ（１）の前端部（１ａ）が本管（ａ
）内に突出しているので、このチューブ（１）の前端部
（ｌａ）、即ち本管（ａ）内の余端を、本管（ａ）内を
遠隔操作的に移動される切断装置（５）により切断し除
去することにより、全ての作業を終了する。本管（ａ）
内余端の切断除去のための作業口としては、本管（ａ）
の長さ方向の途中に適当間隔で設置されているマンホー
ル（図示せず）が利用される。As shown in detail in FIG. 6, at the time of forming the inner lining, the front end (1a) of the tube (1) is
), the front end (la) of this tube (1), i.e. the remaining end inside the main pipe (a), is cut by a cutting device (5) which is moved remotely within the main pipe (a). ) to complete all operations. Main (a)
Main pipe (a) is used as the work opening for cutting and removing the inner surplus end.
Manholes (not shown) installed at appropriate intervals along the length of the pipe are used.
切断装置（５）としては、遠隔操作的にチューブ（１）
の本管（ａ）内余端を切断除去できるような構成のもの
であればよく、例えば進行方向の前端に、筒状回転カッ
タ（５ａ）を具備するような構成のものを用い得る。The cutting device (5) can be used to remotely cut the tube (1).
Any structure may be used as long as the remaining inner end of the main pipe (a) can be cut and removed.For example, a structure having a cylindrical rotary cutter (5a) at the front end in the direction of movement may be used.
このようにして形成された内面ライニングは硬質チュー
ブ（１）から構成されているので、外部より浸入する地
下水圧に充分に耐え得る。Since the inner lining formed in this way is composed of a hard tube (1), it can sufficiently withstand the pressure of groundwater intruding from the outside.
第７〜８図に示されるように、本管（ａ）の内面にチュ
ーブライニング（ｄ）が施されている場合には、本管側
のチューブライニング（ｄ）と枝管部（ｃ）側のチュー
ブライニング（１′）との接合部（６）を接着一体化す
ることが好ましい。As shown in Figures 7 and 8, when the inner surface of the main pipe (a) is provided with tube lining (d), the tube lining (d) on the main pipe side and the branch pipe part (c) side It is preferable that the joint part (6) with the tube lining (1') is integrally bonded with the tube lining (1').
このような接着一体化は、枝管部（Ｃ）側のチューブラ
イニング（１′）の施工時に、硬質チューブ（１）の所
定部位に、外周面に接着剤（図示せず）が塗布されたゴ
ム様弾性の筒状部材（７）を装着しておき、この筒状部
材（７）を硬質チューブ（１）の拡管時に押し拡げ本管
（ａ）のチューブライニング（ｄ）の接合面に押し付は
接着するようにすることによって達成できる。この場合
、先の実施のように、チューブ（１）肉供給のスチーム
が前衿（２）の通孔（２ａ）を通って本管（ａ）内に噴
出すると、本管側のチューブライニング（ｄ）の一部が
加熱軟化され平滑性を失う虞れがあるので、チューブ内
供給のスチームは、前衿（２）に設けたリターンタイプ
の通孔（２ａ＋）及びこれの出口側に接続する導出管（
８）を介して地上へ排出することが好ましい。Such adhesive integration is achieved by applying an adhesive (not shown) to the outer peripheral surface of the rigid tube (1) at a predetermined location when constructing the tube lining (1') on the side of the branch pipe (C). A rubber-like elastic cylindrical member (7) is attached, and when the hard tube (1) is expanded, this cylindrical member (7) is expanded and pushed onto the joint surface of the tube lining (d) of the main pipe (a). Attachment can be achieved by gluing. In this case, as in the previous implementation, when the steam from the meat supply of the tube (1) is ejected into the main pipe (a) through the through hole (2a) of the front collar (2), the tube lining on the main pipe side ( Since there is a risk that a part of d) may be heated and softened and lose its smoothness, the steam supplied in the tube is connected to the return type through hole (2a+) provided in the front collar (2) and the outlet side of this. Outlet pipe (
8) is preferably discharged to the ground.
効 果
このように本発明工法に於ては、片側施工が可能となり
、下水本管より地表部まで延設される枝管部などの内面
ライニングに適用して有用である。Effects As described above, the construction method of the present invention enables construction on one side, and is useful when applied to the inner lining of branch pipes, etc. that extend from the main sewer pipe to the ground surface.
更に内面ライニングを硬質チューブから構成できるので
、強度的に優れ地下水圧に充分に耐え得ると共に硬質で
あるので、このような高品質、高性能を長期間に亘って
持続保持できる。Furthermore, since the inner lining can be constructed from a hard tube, it has excellent strength and can sufficiently withstand underground water pressure, and is also hard, so such high quality and performance can be maintained for a long period of time.
第１図は本発明工法に於けるチューブ挿入工程の途中の
状況を概略的に示す縦断面図、第２図は第１図のＩ−Ｉ
線に沿う断面図、第３図はチューブ挿入終了時の状況を
概略的に示す縦断面図、第４図は同チューブの拡管工程
の状態を概略的に示す縦断面図、第５図は第４図の■−
■線に沿う断面図、第６図はチューブの本管内余端の切
断時の状況を概略的に示す要部拡大断面図、第７〜８図
は本発明工法の他の実施状況を示す縦断面図である。
図に於て、（１）は硬質チューブ、（２）は前衿、（３
）はバネ線材、（４）は後栓、（５）は切断装置である
。
（以 上）Fig. 1 is a vertical sectional view schematically showing the situation during the tube insertion process in the construction method of the present invention, and Fig. 2 is a cross-sectional view taken along I-I in Fig. 1.
3 is a longitudinal sectional view schematically showing the state at the end of tube insertion, FIG. 4 is a longitudinal sectional view schematically showing the state of the tube in the expansion process, and FIG. 5 is a longitudinal sectional view along the line. ■- in Figure 4
■A cross-sectional view taken along the line, Figure 6 is an enlarged cross-sectional view of the main part schematically showing the situation when the remaining end of the main tube is cut, and Figures 7 and 8 are longitudinal cross-sectional views showing other implementation conditions of the construction method of the present invention. It is a front view. In the figure, (1) is a hard tube, (2) is a front collar, and (3) is a hard tube.
) is a spring wire, (4) is a rear plug, and (5) is a cutting device. (that's all)
Claims (1)
に地上に開口された枝管部内面に硬質チューブライニン
グを形成するための工法であって、上記枝管部の先端開
口よりその内部に、挿入方向の前端側が実質的に閉塞さ
れ後端側が開口された硬質チューブを前端閉塞部が本管
内部に至るまで挿入する工程、枝管部内に挿入の上記硬
質チューブの後端開口よりその内部に加熱流体を供給し
該チューブを内部より加熱軟化する工程、加熱軟化状態
にある上記チューブを内部より加圧して管半径方向に拡
管し内面ライニングを形成する工程及び内面ライニング
の本管内余端を、該本体内を遠隔操作的に管軸方向に移
動される切断装置により切断し除去する工程、を含むこ
とを特徴とする埋設管枝管部内面の硬質チューブライニ
ング工法。(1) A method for forming a hard tube lining on the inner surface of a branch pipe whose base end is connected to a main pipe buried underground and whose tip is substantially opened above ground, the method comprising: opening the tip of the branch pipe; a step of inserting a hard tube whose front end side in the insertion direction is substantially closed and whose rear end side is open until the front end closed part reaches inside the main pipe, the rear end of the hard tube inserted into the branch pipe part; A step of supplying heated fluid to the inside of the tube through an opening to heat and soften the tube from the inside, a step of pressurizing the heated and softened tube from the inside to expand the tube in the radial direction and form an inner lining, and a book on the inner lining. 1. A hard tube lining method for the inner surface of a buried pipe branch section, comprising the step of cutting and removing the remaining end of the pipe using a cutting device that is moved in the tube axis direction within the main body by remote control.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62332471A JPH0617069B2 (en) | 1987-12-28 | 1987-12-28 | Hard tube lining method for inner surface of buried pipe branch |
| GB8830020A GB2213230B (en) | 1987-12-28 | 1988-12-22 | Method of lining branch pipe portion of underground main pipe with rigid plastics tube |
| US07/288,832 US4956041A (en) | 1987-12-28 | 1988-12-23 | Method of lining branch pipe portion of underground main pipe with rigid plastics tube |
| KR1019880017693A KR910005159B1 (en) | 1987-12-28 | 1988-12-28 | Method of lining branch pipe portion of underground main pipe with rigid plastic tube |
| DE3844136A DE3844136C2 (en) | 1987-12-28 | 1988-12-28 | Device for feeding branch line sections |
| FR888817324A FR2625290B1 (en) | 1987-12-28 | 1988-12-28 | METHOD FOR LINING A SECTION OF A BRANCHING PIPE OF A SUBTERRANEAN MAIN PIPE USING A RIGID OR SEMI-RIGID PLASTIC TUBE |
| US07/527,971 US5108228A (en) | 1987-12-28 | 1990-05-24 | Method of lining branch pipe portion of underground main pipe with rigid plastics tube |
| GB9116520A GB2244537B (en) | 1987-12-28 | 1991-07-31 | Method of lining branch pipe portion of underground main pipe with rigid plastics tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62332471A JPH0617069B2 (en) | 1987-12-28 | 1987-12-28 | Hard tube lining method for inner surface of buried pipe branch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01171926A true JPH01171926A (en) | 1989-07-06 |
| JPH0617069B2 JPH0617069B2 (en) | 1994-03-09 |
Family
ID=18255334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62332471A Expired - Fee Related JPH0617069B2 (en) | 1987-12-28 | 1987-12-28 | Hard tube lining method for inner surface of buried pipe branch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617069B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292126A (en) * | 1990-04-09 | 1991-12-24 | Osaka Bosui Constr Co Ltd | Rigid tube lining technique on inside of branched pipe part of buried main pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4528520B2 (en) * | 2003-12-11 | 2010-08-18 | 株式会社メーシック | Branch pipe repair material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4962572A (en) * | 1972-10-20 | 1974-06-18 | ||
| JPS62284727A (en) * | 1986-06-02 | 1987-12-10 | Ashimori Ind Co Ltd | Method for lining sewage pipe with branch part |
-
1987
- 1987-12-28 JP JP62332471A patent/JPH0617069B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4962572A (en) * | 1972-10-20 | 1974-06-18 | ||
| JPS62284727A (en) * | 1986-06-02 | 1987-12-10 | Ashimori Ind Co Ltd | Method for lining sewage pipe with branch part |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292126A (en) * | 1990-04-09 | 1991-12-24 | Osaka Bosui Constr Co Ltd | Rigid tube lining technique on inside of branched pipe part of buried main pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617069B2 (en) | 1994-03-09 |
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