JPH04337181A - Pulling method and renewing method for pipe - Google Patents
Pulling method and renewing method for pipeInfo
- Publication number
- JPH04337181A JPH04337181A JP3107161A JP10716191A JPH04337181A JP H04337181 A JPH04337181 A JP H04337181A JP 3107161 A JP3107161 A JP 3107161A JP 10716191 A JP10716191 A JP 10716191A JP H04337181 A JPH04337181 A JP H04337181A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- main pipe
- wire
- main
- new
- 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
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000035882 stress Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010010214 Compression fracture Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、配設保護管内に本管を
通管した配管路における旧本管の撤去並びに本管の更新
に使用する管の引き抜き方法及び更新方法に関し、鞘管
式配管路での本管の更新に有用なものである。[Industrial Application Field] The present invention relates to a method for removing an old main pipe from a piping route in which a main pipe is passed through an installed protection pipe, and a method for extracting and renewing a pipe used for replacing the main pipe. It is useful for main renewal in pipelines.
【0002】0002
【従来の技術】建物内の配管に使用する鞘管式配管路は
、建物の躯体工事時に鞘管(保護管)をスラブ床に配設
しておき、後日の設備工事時にその既設鞘管内に本管(
給排水管,給湯管,ガス管)を通管する方式であり、管
路の老朽化に対して本管の更新のみで対処できる有利性
がある。[Prior Art] In the sheath pipe type piping route used for piping inside buildings, the sheath pipe (protective pipe) is installed on the slab floor during construction of the building frame, and then inserted into the existing sheath pipe during equipment construction at a later date. main(
This method has the advantage that aging pipes can be dealt with by simply renewing the main pipes.
【0003】従来、鞘管式配管路の更新工事においては
、本管の両端、即ち本管とヘッダ−との間並びに本管と
ユ−スポイント(例えば、カラン)との間を切断し、而
るのち、本管の一端を引っ張って旧本管を引き抜き、こ
の引き抜いた跡に新規な本管を通管している。[0003] Conventionally, in renewal work for sheath pipe type piping, both ends of the main pipe, that is, between the main pipe and the header and between the main pipe and the use point (for example, a callan) are cut. After that, the old main pipe was pulled out by pulling on one end of the main pipe, and the new main pipe was passed through the area where it was pulled out.
【0004】0004
【発明が解決しようとする課題】上記旧本管の引き抜き
においては、旧本管と配設保護管との間に作用する摩擦
力のために旧本管に引っ張り力が作用する。即ち、本管
と保護管との間に作用する単位長さあたりの摩擦力をf
とすると、本管後端(管の引き抜き方向に対しての後端
)からxの位置における本管箇所に、F=fxなる引っ
張り力が作用する。而るに、上記旧本管における劣化は
全長に一様とは限らず、局所的に劣化していることが通
常であり、この局所的劣化箇所は通常、長さ方向の中間
に存在するから、上記引っ張り破断が最大引っ張り応力
箇所、即ち本管の引っ張り先端側で生じることは稀であ
り、旧本管の途中で生じることが多い。When the old main pipe is pulled out, a tensile force acts on the old main pipe due to the frictional force acting between the old main pipe and the installed protection pipe. In other words, the frictional force per unit length acting between the main pipe and the protection pipe is f
Then, a tensile force F=fx acts on the main pipe at a position x from the rear end of the main pipe (the rear end with respect to the direction in which the pipe is pulled out). However, the deterioration in the old main pipe mentioned above is not necessarily uniform over the entire length, but is usually localized, and these localized deterioration points are usually located in the middle of the length. , the above-mentioned tensile fracture rarely occurs at the point of maximum tensile stress, that is, at the tensile tip side of the main pipe, and often occurs in the middle of the old main pipe.
【0005】このように、引き抜き中の旧本管の中間で
引っ張り破断が生じると、その破断片が保護管内に残っ
てしまい、新規な本管の引き入れ、即ち、本管の更新作
業が至難となる。[0005] In this way, if a tensile break occurs in the middle of the old main pipe that is being pulled out, the broken pieces remain in the protective pipe, making it extremely difficult to pull in a new main pipe, that is, to renew the main pipe. Become.
【0006】本発明の目的は、配設保護管内に本管を通
管した配管路において、老巧・劣化した旧本管を破断さ
せることなく完全に撤去でき、更に、新規な本管をスム
−ズに通管し得る管の引き抜き方法及び更新方法を提供
することにある。An object of the present invention is to be able to completely remove old and deteriorated old main pipes without rupturing them in a piping route in which a main pipe runs inside a protection pipe, and also to quickly install a new main pipe. An object of the present invention is to provide a method for extracting and renewing a pipe that can be passed through a pipe.
【0007】[0007]
【課題を解決するための手段】本発明の管の引き抜き方
法は、配設保護管内に本管を通管した配管路において、
本管に牽引ワイヤ−を挿通し、該ワイヤ−の一端と本管
の一端とを結着し、而るのち、牽引ワイヤ−の他端側を
牽引して配設保護管内から本管を引き抜くことを特徴と
する構成である。[Means for Solving the Problems] The method for pulling out a pipe of the present invention is to
Insert a traction wire into the main pipe, tie one end of the wire to one end of the main pipe, and then pull the other end of the traction wire to pull out the main pipe from inside the protective tube. This configuration is characterized by the following.
【0008】本発明の管の更新方法は、配設保護管内に
本管を通管した配管路において、本管に牽引ワイヤ−を
挿通し、該ワイヤ−の一端と本管の一端とを結着し、同
ワイヤ−の一端と新規な管の先端とを連結し、而るのち
、牽引ワイヤ−の他端側を牽引して配設保護管内から本
管を引き抜くと共に新規な本管を配設保護管内に通管す
ることを特徴とする構成である。The pipe renewal method of the present invention involves inserting a pulling wire into the main pipe and connecting one end of the wire to one end of the main pipe in a pipe line in which the main pipe is passed through the installed protection pipe. Connect one end of the same wire to the tip of the new pipe, and then pull the other end of the traction wire to pull out the main pipe from inside the protective pipe and install the new main pipe. This structure is characterized by passing through the installed protection pipe.
【0009】[0009]
【作用】力学的に本管が後端から押されて撤去されるの
と等価となり、本管と配設保護管との間の摩擦力のより
本管に作用する応力は、圧縮応力となる。而るに、管の
軸方向圧縮力による破断は管の軸方向引っ張力による破
断よりも生じ難く、本管と保護管との引っ掻きなどを生
じることなく本管をスム−ズに撤去できる。たとえ、破
断が生じても、後端からの押圧のために、破断片が保護
管内に残ることがなく、更新作業を良好に行い得る。[Operation] Mechanically, it is equivalent to the main pipe being pushed from the rear end and removed, and the stress acting on the main pipe due to the frictional force between the main pipe and the installed protection pipe becomes compressive stress. . Therefore, the pipe is less likely to break due to the axial compressive force than the pipe due to the axial tensile force, and the main pipe can be removed smoothly without scratching between the main pipe and the protection pipe. Even if a break occurs, the broken pieces will not remain in the protective tube due to the pressure from the rear end, and the renewal work can be performed satisfactorily.
【0010】0010
【実施例】以下、図面により本発明の実施例を説明する
。図1の(イ)乃至(ニ)は本発明の管の引き抜き方法
を示す説明図である。Embodiments Hereinafter, embodiments of the present invention will be explained with reference to the drawings. FIGS. 1A to 1D are explanatory diagrams showing the tube drawing method of the present invention.
【0011】図1の(イ)は鞘管工法によって施工した
配管路において、本管1(給排水管,給湯管,ガス管)
の両端を切断した状態、即ち、本管とヘッダ−との間並
びに本管とユ−スポイント(例えば、カラン)との間を
切断した状態を示している。FIG. 1(a) shows the main pipe 1 (water supply and drainage pipe, hot water supply pipe, gas pipe) in the pipe line constructed by the sheath pipe method.
This figure shows a state in which both ends of the pipe are cut, that is, a state in which the main pipe and the header and between the main pipe and the use point (for example, the cutter) are cut.
【0012】本発明によって鞘管2内から旧本管を引き
抜くには、図1の(イ)に示すように、本管1の両端を
切断した後、図1の(ロ)に示すように、本管1内に本
管一端(前端)から他端(後端)にわたって牽引ワイヤ
−3を挿通する。この牽引ワイヤ−3の挿通には、所謂
、割り竹通しを行い、この挿通した割り竹をリ−ドとし
て牽引ワイヤ−を挿通する方法、細線(呼び線)の先端
に取り付けた気送子を本管内に圧縮エァ−の吹き込みに
よって貫走させ、その細線をリ−ド線として牽引ワイヤ
−を通線する方法などを使用できる。According to the present invention, in order to pull out the old main pipe from inside the sheath pipe 2, as shown in FIG. 1(A), both ends of the main pipe 1 are cut, and then as shown in FIG. 1(B), The traction wire 3 is inserted into the main pipe 1 from one end (front end) to the other end (rear end) of the main pipe. The traction wire 3 is inserted through a so-called split bamboo thread, and the traction wire is inserted using the inserted split bamboo as a lead. A method can be used in which the main pipe is penetrated by blowing compressed air, and a pulling wire is passed through the thin wire as a lead wire.
【0013】本管1に牽引ワイヤ−3を挿通した後は、
図1の(ハ)に示すように、ワイヤ−3の後端に留め治
具4を連結し、牽引ワイヤ−3を前端側Aから引っ張り
、図1の(ニ)に示すように、治具4を本管1の後端に
係止さた状態で牽引ワイヤ−3の引っ張りを続けていく
。After inserting the traction wire 3 into the main pipe 1,
As shown in FIG. 1(C), connect the fastening jig 4 to the rear end of the wire 3, pull the pulling wire 3 from the front end side A, and as shown in FIG. 4 is locked to the rear end of the main pipe 1, and the pulling wire 3 is continued to be pulled.
【0014】この場合の力学的状態は、本管1の後端に
押圧力を加えて本管1を鞘管2内に移動させていくのと
等価であり、本管1と鞘管との間の摩擦によって、本管
1は圧縮応力を受けるのみであって、鞘管2と本管1と
の間に作用する単位あたりの摩擦力をfとすれば、鞘管
前端から距離yの位置での本管箇所の軸方向圧縮力は、
W=fyで与えられる。The mechanical state in this case is equivalent to applying a pressing force to the rear end of the main pipe 1 to move the main pipe 1 into the sheath pipe 2, and the relationship between the main pipe 1 and the sheath pipe is The main pipe 1 only receives compressive stress due to the friction between them, and if the frictional force per unit acting between the sheath pipe 2 and the main pipe 1 is f, then the position at a distance y from the front end of the sheath pipe The axial compressive force at the main pipe location is
It is given by W=fy.
【0015】而して、本管1の撤去中、本管1に作用す
る軸方向応力は、実質上、圧縮応力のみであり、通常、
管の軸方向圧縮破断は軸方向引っ張り破断に比べて生じ
難いから(例えば、管にクラックが存在する場合、引っ
張りではクラックが拡開されて破断が生じやすいが、圧
縮では生じ難い)、本管撤去中での本管1の破断をよく
防止でき、本管1と鞘管との引っ掻りなく、本管1を撤
去できる。従って、撤去をスム−ズに行い得、又鞘管2
の内面を傷付けることがない。[0015] During the removal of the main pipe 1, the axial stress acting on the main pipe 1 is substantially only compressive stress, and usually
Because axial compression fractures of pipes are less likely to occur than axial tension fractures (for example, if a crack exists in a pipe, tension tends to widen the crack and cause rupture, but compression is less likely to cause it). Breaking of the main pipe 1 during removal can be well prevented, and the main pipe 1 can be removed without scratching between the main pipe 1 and the sheath pipe. Therefore, removal can be carried out smoothly, and the sheath pipe 2
It will not damage the inside of the body.
【0016】たとえ、本管1が切断されても、切断片が
鞘管2内に残ることがなく、本管1を完全に撤去できる
。上記の留め治具4には、本管に強固に結着し得るもの
であれば、適宜のものを使用できる。例えば、図2の(
イ)に示すように、本管端にかしめて結着するもの(金
属製)、図2の(ロ)に示すように、溝41において嵌
合するもの、図2の(ハ)に示すように、テ−パ−コア
状としたもの、図2の(ニ)に示すように、捩じ込み式
としたもの等を使用できる。Even if the main pipe 1 is cut, no cut pieces remain in the sheath pipe 2, and the main pipe 1 can be completely removed. Any suitable fastening jig 4 can be used as long as it can be firmly attached to the main pipe. For example, in Figure 2 (
As shown in (a), there is one (made of metal) that is caulked and tied to the end of the main pipe, one that fits in the groove 41 as shown in (b) of Figure 2, and one that fits in the groove 41 as shown in (c) of Figure 2. Alternatively, a tapered core type or a screw-in type as shown in FIG. 2(d) can be used.
【0017】上記治具4と牽引ワイヤ−3との連結構造
には、ワンタッチで連結できるものを使用することが好
ましい。例えば、図3の(イ)、(ロ)に示すように、
治具4にかぎ状又はリング状フック42を設けたもの、
図3の(ハ)に示すように、ボルト43を取着し、牽引
ワイヤ3−の後端をこのボルト43で巻締めるもの、図
3の(ニ)に示すように治具4に螺子穴44を設け、牽
引ワイヤ−3の後端に螺子端子31を取付け、この螺子
端子31を螺子穴44に螺結するもの、図3の(ホ)に
示すように、治具4に中央穴45を設け、この中央穴4
5に牽引ワイヤ−3の後端部を挿通のうえストッパ−3
2を取付け、このストッパ−32を治具4の前面に係止
するもの等を使用できる(治具に切欠きを設ければ、即
ち、治具の横断面形状をC型にすれば、予めストッパ−
32を取り付けたワイヤ−3を横から入れることができ
る)。It is preferable to use a structure for connecting the jig 4 and the pulling wire 3 that can be connected with one touch. For example, as shown in (a) and (b) of Figure 3,
A jig 4 provided with a hook-shaped or ring-shaped hook 42,
As shown in FIG. 3(c), a bolt 43 is attached and the rear end of the traction wire 3- is tightened with this bolt 43, and as shown in FIG. 3(d), a screw hole is inserted into the jig 4. 44, a screw terminal 31 is attached to the rear end of the traction wire 3, and the screw terminal 31 is screwed into the screw hole 44, as shown in FIG. , and this central hole 4
5, insert the rear end of the traction wire 3 through the stopper 3
2 and which locks this stopper 32 on the front surface of the jig 4. stopper
32 can be inserted from the side).
【0018】又、図3の(ヘ)に示すように、治具4に
牽引ワイヤ−結着用のア−ム45を設ける場合、このア
−ム45に弾性により、または自在継手構造により可撓
性を付与すれば、鞘管両端部の曲がり部通過時でも、治
具4に回転モ−メントが作用するのを確実に排除でき、
治具と本管後端との安全な結着状態を保持するのに有効
である。Further, as shown in FIG. 3(f), when the jig 4 is provided with an arm 45 for tying the traction wire, this arm 45 is made flexible by elasticity or by a universal joint structure. By imparting this flexibility, it is possible to reliably eliminate rotational moment from acting on the jig 4 even when passing through the bends at both ends of the sheath tube.
This is effective in maintaining a safe connection between the jig and the rear end of the main pipe.
【0019】次に、本発明により鞘管内の旧本管を新規
な本管に更新するには、図4に示すように、牽引ワイヤ
−3の後端と旧本管1の後端とを治具4で結着すると共
に牽引ワイヤ−3に新規な本管10の先端を連結し、牽
引ワイヤ−3の牽引により旧本管1を鞘管2内から撤去
すると共に新規な本管10を鞘管2内に引き込んでいく
。Next, in order to replace the old main pipe in the sheath pipe with a new main pipe according to the present invention, as shown in FIG. The tip of the new main pipe 10 is tied with the jig 4, and the tip of the new main pipe 10 is connected to the traction wire 3, and the old main pipe 1 is removed from the sheath pipe 2 by pulling the traction wire 3, and the new main pipe 10 is inserted. It is pulled into the sheath tube 2.
【0020】この場合、管路が長尺であれば、新規な本
管10を鞘管2の後端側Bから鞘管2内に押し込むと共
に上記牽引ワイヤ−3の引っ張力により引き入れること
が望ましく、管路が比較的短い場合は、牽引ワイヤ−3
の引っ張り力のみで引き込んでいくことができる。In this case, if the pipe line is long, it is desirable to push the new main pipe 10 into the sheath pipe 2 from the rear end side B of the sheath pipe 2 and to pull it in by the pulling force of the pulling wire 3. , if the conduit is relatively short, pull wire-3
It can be pulled in using only the pulling force.
【0021】上記本管の更新においては、新規な本管1
0の先端と牽引ワイヤ−3との連結を図5の(イ)乃至
(ニ)に示すように、新規な本管10の先端を治具4に
結着することによって行うこともできる。図5の(イ)
乃至(ニ)において、は新規な本管を、1は旧本管を、
4は治具を、3牽引ワイヤ−を、32はストッパ−をそ
れぞれ示している。[0021] In the above main update, a new main 1
The tip of the new main tube 10 can also be connected to the traction wire 3 by tying the tip of the new main pipe 10 to the jig 4, as shown in FIGS. (a) in Figure 5
In to (d), 1 refers to the new main, 1 refers to the old main,
4 represents a jig, 3 represents a pulling wire, and 32 represents a stopper.
【0022】[0022]
【発明の効果】本発明の管の引き抜き方法によれば、管
に作用する管軸方向応力が引っ張り応力ではなく圧縮応
力であるから、管の破断をよく回避でき、保護管内面と
の引っ掻きをよく防止して管をスム−ズに撤去し得ると
共に、保護管内面の傷付きを防止できる。たとえ、管が
破断しても、破断片を保護管内に残すことなく完全に撤
去できる。[Effects of the Invention] According to the tube pulling method of the present invention, since the tube axial stress acting on the tube is compressive stress rather than tensile stress, tube breakage can be well avoided and scratches with the inner surface of the protective tube can be avoided. The tube can be removed smoothly with good protection, and damage to the inner surface of the protective tube can be prevented. Even if the tube breaks, it can be completely removed without leaving any broken pieces inside the protective tube.
【0023】又、本発明の管の更新方法によれば、旧管
の撤去と同じに新規の管に更新でき、優れた作業性を保
証でき、更に、旧管の撤去に伴う保護管内面の傷付きを
よく排除できるから、良好な信頼性で管の更新を行い得
る。Furthermore, according to the pipe renewal method of the present invention, a new pipe can be replaced at the same time as the old pipe is removed, ensuring excellent workability. Since damage can be well eliminated, pipes can be renewed with good reliability.
【図1】本発明の管の引き抜き方法の作業手順を示す説
明図である。FIG. 1 is an explanatory diagram showing the working procedure of the tube drawing method of the present invention.
【図2】本発明において使用する留め治具の異なる例を
示す説明図である。FIG. 2 is an explanatory diagram showing different examples of fastening jigs used in the present invention.
【図3】本発明において使用する留め治具と牽引ワイヤ
−との連結構造の異なる例を示す説明図である。FIG. 3 is an explanatory view showing different examples of connection structures between a fastening jig and a pulling wire used in the present invention.
【図4】本発明の管の更新方法の実施例を示す説明図で
ある。FIG. 4 is an explanatory diagram showing an embodiment of the pipe renewal method of the present invention.
【図5】本発明の管の更新方法において使用する留め治
具の異なる例を示す説明図である。FIG. 5 is an explanatory diagram showing different examples of fastening jigs used in the pipe renewal method of the present invention.
1 本管 2 保護管 3 牽引ワイヤ− 4 留め治具 1 Main 2 Protection tube 3 Traction wire 4 Fastening jig
Claims (2)
いて、本管に牽引ワイヤ−を挿通し、該ワイヤ−の一端
と本管の一端とを結着し、而るのち、牽引ワイヤ−の他
端側を牽引して配設保護管内から本管を引き抜くことを
特徴とする管の引き抜き方法。Claim 1: In a piping path in which a main pipe is passed through an installed protection pipe, a traction wire is inserted into the main pipe, one end of the wire is tied to one end of the main pipe, and then, A method for pulling out a tube, characterized in that the main tube is pulled out from inside the protective tube by pulling the other end of the traction wire.
いて、本管に牽引ワイヤ−を挿通し、該ワイヤ−の一端
と本管の一端とを結着し、同ワイヤ−の一端と新規な管
の先端とを連結し、而るのち、牽引ワイヤ−の他端側を
牽引して配設保護管内から本管を引き抜くと共に新規な
本管を配設保護管内に通管することを特徴とする管の更
新方法。Claim 2: In a piping path in which a main pipe is passed through a protective pipe, a traction wire is inserted into the main pipe, one end of the wire is tied to one end of the main pipe, and the wire is connected to the other end of the main pipe. Connect one end to the tip of the new pipe, and then pull the other end of the traction wire to pull out the main pipe from inside the installed protective tube and pass the new main pipe into the installed protective tube. A method for renewing a pipe, characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3107161A JPH04337181A (en) | 1991-05-13 | 1991-05-13 | Pulling method and renewing method for pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3107161A JPH04337181A (en) | 1991-05-13 | 1991-05-13 | Pulling method and renewing method for pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04337181A true JPH04337181A (en) | 1992-11-25 |
Family
ID=14452043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3107161A Pending JPH04337181A (en) | 1991-05-13 | 1991-05-13 | Pulling method and renewing method for pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04337181A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017180704A (en) * | 2016-03-30 | 2017-10-05 | 積水化学工業株式会社 | Lotus pipe repair tool and lotus pipe repair method |
JP2021085502A (en) * | 2019-11-29 | 2021-06-03 | 株式会社タブチ | Piping renewal method |
JP2021092285A (en) * | 2019-12-11 | 2021-06-17 | 株式会社タブチ | Piping renewing construction method |
JP2021095946A (en) * | 2019-12-16 | 2021-06-24 | 株式会社タブチ | Pipe renewal construction method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01250594A (en) * | 1987-12-31 | 1989-10-05 | Kyokuto Kaihatsu Kogyo Co Ltd | Replacement of buried piping |
-
1991
- 1991-05-13 JP JP3107161A patent/JPH04337181A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01250594A (en) * | 1987-12-31 | 1989-10-05 | Kyokuto Kaihatsu Kogyo Co Ltd | Replacement of buried piping |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017180704A (en) * | 2016-03-30 | 2017-10-05 | 積水化学工業株式会社 | Lotus pipe repair tool and lotus pipe repair method |
JP2021085502A (en) * | 2019-11-29 | 2021-06-03 | 株式会社タブチ | Piping renewal method |
JP2021092285A (en) * | 2019-12-11 | 2021-06-17 | 株式会社タブチ | Piping renewing construction method |
JP2021095946A (en) * | 2019-12-16 | 2021-06-24 | 株式会社タブチ | Pipe renewal construction method |
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