JPH09123278A - Covering body for repair of existing pipeline - Google Patents
Covering body for repair of existing pipelineInfo
- Publication number
- JPH09123278A JPH09123278A JP7284101A JP28410195A JPH09123278A JP H09123278 A JPH09123278 A JP H09123278A JP 7284101 A JP7284101 A JP 7284101A JP 28410195 A JP28410195 A JP 28410195A JP H09123278 A JPH09123278 A JP H09123278A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- base
- repair
- repairing
- existing pipeline
- 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
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pipe Accessories (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、既に設置された下
水道等の既設管路の補修に用いられる補修用被覆体に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing cover used for repairing an existing pipeline such as sewer installed already.
【０００２】[0002]
【従来の技術】一般に、地中に埋設された下水管等の既
設管路は、ヒューム管、陶管等が広く使用されている。
これら管路は長期間の使用により内周面が硫化水素やそ
の他の腐食ガス及び付着物等によって侵食され、かつ劣
化して強度が低下している。また地圧や地盤沈下等によ
って管路の継目部がずれて隙間ができたり、上載荷重等
によって管路の一部にクラックが発生し、この部分より
地下水等が管路内に浸入、或いは管路内を流れる流水等
が地中に漏水することがある。2. Description of the Related Art Generally, as existing pipelines such as sewer pipes buried in the ground, fume pipes and ceramic pipes are widely used.
The inner peripheral surface of these conduits is eroded by hydrogen sulfide and other corrosive gases and deposits, and deteriorates and deteriorates in strength over a long period of use. Also, due to ground pressure or ground subsidence, the seam part of the pipeline is displaced and a gap is created, or cracks occur in part of the pipeline due to overloading, etc.From this part groundwater etc. infiltrate into the pipeline or Water flowing in the road may leak into the ground.
【０００３】この対策として既設管路の内径より小なる
外径を有する不透水性の弾性変形可能な材料、例えばゴ
ム製のスリーブと、拡開可能に巻かれた状態でスリーブ
の内側に配置されたシート状のベースと、ベースを拡開
状態に維持する係合孔と係合片とからなる拡開保持手段
とを有する補修用被覆体を前記管路内のクラック発生部
や隙間が生じた管路の継目部等の補修すべき所定箇所へ
搬入し、ここにおいて拡開機によってベースを押し広
げ、拡開保持手段によってベースを拡開した状態に維持
することにより管路内周面に押圧固定し、管路内周面を
補修用被覆体で被覆する既設管路の補修方法がある。As a countermeasure against this, a water-impermeable and elastically deformable material having an outer diameter smaller than the inner diameter of the existing pipeline, for example, a sleeve made of rubber, and an expandable coil are arranged inside the sleeve. A sheet-like base, and a repair coating having an expansion holding means composed of an engagement hole and an engagement piece for maintaining the base in an expanded state, a cracked portion or a gap was formed in the pipeline. It is carried to a predetermined place to be repaired, such as the joint part of the pipeline, where the expansion machine spreads the base and the expansion holding means keeps the base expanded to press and fix it to the inner surface of the pipeline. However, there is a method of repairing an existing pipeline by covering the inner peripheral surface of the pipeline with a repair coating.
【０００４】また他の既設管路の補修方法は、拡開可能
な筒状に巻かれたシート状のベースと、補強繊維からな
る基材に未硬化状態の硬化性樹脂を含浸させた樹脂層を
内外両面から内側薄膜及び外側薄膜により被覆し、かつ
両端部分が互に重なり合うようにベース外周上に積層巻
回するマット状の樹脂シートと、巻回された樹脂シート
の両端縁部外周上に各々周方向に沿って嵌装する環状の
止水体と、ベースを拡開状態に維持する拡開保持手段と
を有する補修用被覆体を、クラック発生部や隙間が生じ
た継目部等の補修すべき管路内の所定箇所へ搬入し、こ
こにおいて拡開機によってベースを押し広げ、拡開保持
手段によりベースを拡開した状態に保持することにより
樹脂シートを管路内周面に押圧せしめ、かつ樹脂シート
内の未硬化状態の硬化性樹脂を硬化させることにより管
路内周面を補修用被覆体で被覆するものである。Another method for repairing an existing pipeline is a sheet-like base that can be expanded and rolled into a tubular shape, and a resin layer in which a base material made of reinforcing fibers is impregnated with an uncured curable resin. A mat-shaped resin sheet that is covered with an inner thin film and an outer thin film from both the inner and outer surfaces and is wound on the outer circumference of the base in a laminated manner so that both end portions overlap each other; Repairing a repair cover having an annular water stop body fitted along the circumferential direction and an expansion holding means for maintaining the base in an expanded state, such as a seam portion having a cracked portion or a gap. It is carried into a predetermined location in the pipeline, where the base is spread by the spreader, and the base is held in the expanded state by the spread holding means to press the resin sheet against the inner peripheral surface of the pipeline, and The uncured state inside the resin sheet It is intended to cover the pipe inner peripheral surface in repairing covering body by curing a resistance resin.
【０００５】[0005]
【発明が解決しようとする課題】上記前者を拡開したベ
ースによりスリーブを管路内周面に押圧固定する補修用
被覆体にあっては、管路内周面を不透水性のスリーブに
より被覆することから充分な止水効果が得られる。しか
しスリーブが容易に弾性変形可能であり、ベースの押圧
力によってのみ補修用被覆体が管路内に設置されること
から、地震、地圧変化等の荷重による管路の変形に伴っ
てスリーブを介してベースが押し潰されて変形し、拡開
手段の係合が外れ、管路内の流水等により補修用被覆体
が押し流される等長期に亘る補修効果が確保できなくな
るおそれがある。In the repair covering body in which the sleeve is pressed and fixed to the inner peripheral surface of the conduit by the base that expands the former, the inner peripheral surface of the conduit is covered with the impermeable sleeve. As a result, a sufficient water blocking effect can be obtained. However, the sleeve can be easily elastically deformed, and the repair cover is installed in the pipeline only by the pressing force of the base.Therefore, the sleeve is not deformed as the pipeline is deformed by the load such as an earthquake or a change in ground pressure. There is a possibility that the repair effect for a long period of time cannot be ensured because the base is crushed and deformed through this, the expansion means is disengaged, and the repair coating is pushed away by the running water in the conduit.
【０００６】一方、樹脂シートをベースにより管路内周
面に押圧して硬化性樹脂を硬化せしめて管路内周面を被
覆する後者の補修用被覆体にあっては、管路内周面が硬
化した樹脂シートによって覆われることから管路の補強
効果が得られる。しかし拡開可能に巻かれた筒状のベー
ス外周上に両端部分が互に重なるよう樹脂シートを巻回
することから、互に重なり合う樹脂シートの両端部分の
一方の端縁と他方の端縁部分との間に段差が生じ、ベー
スの拡開により樹脂シートを管路内周面に押圧した状態
においてもその端縁に沿って段部が残存し、樹脂シート
と管路内周面との密着性が妨げられ、かつ巻装された樹
脂シート外周に嵌装する止水材との間に隙間が発生して
充分な止水効果が得られなくなるおそれがあり、更に重
なり合う樹脂シートの両端部分が厚くなり、管路内周面
を被覆する樹脂シートの厚さが不均一になることから均
一な補強効果が得られない等の不具合がある。On the other hand, in the latter repair coating for covering the inner peripheral surface of the conduit by pressing the resin sheet against the inner peripheral surface of the conduit by the base to cure the curable resin, the inner peripheral surface of the conduit is Since it is covered with the cured resin sheet, the reinforcing effect of the pipeline can be obtained. However, since the resin sheets are wound on the outer circumference of the cylindrical base that can be expanded so that both end portions overlap each other, one edge of the both end portions of the resin sheet that overlaps each other and the other edge portion There is a step between the resin sheet and the inner peripheral surface of the pipe, and even if the resin sheet is pressed against the inner peripheral surface of the conduit by the expansion of the base, a step remains along the edge of the resin sheet and the inner peripheral surface of the pipe adheres. Of the resin sheet, and there is a possibility that a gap may be generated between the water blocking material fitted around the wound resin sheet and a sufficient water blocking effect may not be obtained. Since the resin sheet becomes thicker and the thickness of the resin sheet covering the inner peripheral surface of the conduit becomes uneven, there is a problem that a uniform reinforcing effect cannot be obtained.
【０００７】従って、本発明の目的は、充分な補強効果
及び止水効果が得られ、長期間に亘補修効果が確保でき
る既設管路の補修用被覆体を提供することである。Accordingly, an object of the present invention is to provide a covering for repairing an existing pipeline, which can obtain a sufficient reinforcing effect and a water blocking effect and can secure a repairing effect for a long period of time.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
の本発明における既設管路の補修用被覆体は、既設管路
内周面を被装して補修する既設管路の補修用被覆体にお
いて、拡開可能な筒状に巻かれたシート状のベースと、
筒状の基材に未硬化状態の硬化性樹脂を含浸せしめた樹
脂層を具備し、かつ前記筒状に巻かれたベース外周上を
被装する筒状のスリーブと、スリーブ両端縁部外周上に
各々周方向に沿って設けられスリーブ端縁部外周部と管
路内周面とを水密的に接合する環状の止水体と、ベース
を拡開状態に保持する拡開保持手段とを有することを特
徴とするものでり、また本発明における他の既設管路の
補修用被覆体は、既設管路内周面を被装して補修する既
設管路の補修用被覆体において、拡開可能に巻かれたシ
ート状のベースと、周方向に伸長可能な筒状の基材に未
硬化状態の硬化性樹脂を含浸せしめた樹脂層を具備する
前記筒状に巻かれたベース外周上を被装する筒状のスリ
ーブと、スリーブ両端縁部外周上に各々周方向に沿って
設けられてスリーブ端縁部外周部と管路内周面とを水密
的に接合する環状の止水体と、ベースを拡開状態に保持
する拡開保持手段とを有し、スリーブの拡開に伴って基
材が周方向に伸長せしめられることを特徴とするもので
ある。In order to achieve the above-mentioned object, a repair coating for an existing pipeline according to the present invention is a coating for repairing an existing pipeline for covering and repairing the inner peripheral surface of the existing pipeline. At, a sheet-shaped base that can be expanded and rolled into a tubular shape,
A cylindrical sleeve having a resin layer in which a uncured curable resin is impregnated in a cylindrical base material, and covering the outer circumference of the base wound in a cylindrical shape, and the outer circumferences of both end edges of the sleeve. An annular water stop body that is provided along each of the circumferential directions and that watertightly joins the outer peripheral portion of the sleeve end edge portion and the inner peripheral surface of the conduit, and an expansion holding means that holds the base in an expanded state. In addition, other existing pipeline repair coverings according to the present invention can be expanded in the existing pipeline repair coverings for repairing by covering the inner peripheral surface of the existing pipeline. A sheet-shaped base wound around the base and a cylindrical base material that is extensible in the circumferential direction and a resin layer obtained by impregnating an uncured curable resin on the outer circumference of the cylindrical-wrapped base. A cylindrical sleeve to be mounted, and three sleeves provided along the circumferential direction on the outer circumference of both end edges of the sleeve. An annular water stop body that watertightly joins the outer peripheral portion of the end edge portion and the inner peripheral surface of the conduit, and an expansion holding means that holds the base in an expanded state, and the base material as the sleeve expands. Is characterized by being extended in the circumferential direction.
【０００９】[0009]
【発明の実施の形態】以下、本発明における既設管路の
補修用被覆体の一実施の形態を図によって説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a repair coating for an existing pipeline according to the present invention will be described below with reference to the drawings.
【００１０】図１は補修用被覆体１０の斜視図であっ
て、図２は図１のＡ−Ａ線断面図である。FIG. 1 is a perspective view of the repair cover 10, and FIG. 2 is a sectional view taken along line AA of FIG.
【００１１】補修用被覆体１０は、ベース２０、筒状の
スリーブ３０及び一対の止水体４０によって構成されて
いる。ベース２０はステンレス鋼、銅、銅合金のような
耐腐食性に優れる金属材料或いはポリ塩化ビニル等の合
成樹脂、若しくは形状記憶合金または形状記憶合成樹脂
製であって、図１に示すように一端部２１が他端部２２
の内側となるよう互に重なる筒状、即ち渦巻状に形成さ
れる。The repair cover 10 is composed of a base 20, a tubular sleeve 30, and a pair of water blocking bodies 40. The base 20 is made of a metal material having excellent corrosion resistance such as stainless steel, copper, or a copper alloy, or a synthetic resin such as polyvinyl chloride, or a shape memory alloy or a shape memory synthetic resin. As shown in FIG. The part 21 is the other end 22
It is formed in a cylindrical shape that overlaps with each other so as to be inside of, that is, a spiral shape.
【００１２】そしてベース２０は図３にその展開斜視図
を示すように弾性変形可能な細長いシート状のベース部
２３を有し、ベース部２３の両側端に沿ってスリーブ３
０を両側から収容するように外方に湾曲した一対の縁部
２４を有し、この縁部２４により後述する管路１内に流
れる流水や管路内洗浄の際スリーブ３０及び止水体４０
を保護し、かつベース２０の補剛を図ることにより管路
１の強度向上を図っている。The base 20 has a slender sheet-like base portion 23 which is elastically deformable as shown in the exploded perspective view of FIG.
It has a pair of outwardly curved edge portions 24 so as to accommodate 0 from both sides, and the sleeve portions 30 and the water blocking body 40 are provided by the edge portions 24 when flowing water in the pipeline 1 described later or when cleaning the pipeline.
Is protected and the base 20 is stiffened to improve the strength of the conduit 1.
【００１３】更にベース部２３の一端部２１付近にベー
ス部の長手方向に間隔をおいて形成された複数組の係止
孔２６、２７、２８と、ベース部２３が拡開されたとき
いずか一組の係止孔２６、２７或いは２８に選択的に係
合可能にベース部２３の他端部２２付近に切り起し加工
によってベース２０の内方へ突出形成された係止片２９
とにより拡開保持手段２５を構成している。Further, a plurality of sets of locking holes 26, 27, 28 formed in the vicinity of one end 21 of the base portion 23 at intervals in the longitudinal direction of the base portion, and when the base portion 23 is expanded, it is necessary. A locking piece 29 formed to project inward of the base 20 by cutting and raising in the vicinity of the other end 22 of the base portion 23 so as to be selectively engageable with the set of locking holes 26, 27 or 28.
The expansion holding means 25 is constituted by
【００１４】一方スリーブ３０は、図４に一部破断説明
図を示すようにガラス繊維、ポリエステル繊維等の補強
繊維からなり、編まれ、または織布或いは不織布状で筒
状の基材を１層或いは複数個積層し、本実施形態では２
層の基材３１、３２に未硬化状態の硬化性樹脂、例えば
不飽和ポリエステル系樹脂等の常温硬化型熱硬化性樹脂
３３を含浸させて形成した樹脂層３４と、この樹脂層３
４の内外両面を各々被覆するポリエチレンフィルム等の
内側薄膜３５及び外側薄膜３６とを有している。On the other hand, the sleeve 30 is made of reinforcing fibers such as glass fibers and polyester fibers as shown in the partially cutaway explanatory view in FIG. Alternatively, a plurality of layers are stacked, and in this embodiment, 2
A resin layer 34 formed by impregnating the base materials 31 and 32 of the layer with an uncured curable resin, for example, a room temperature curable thermosetting resin 33 such as an unsaturated polyester resin, and the resin layer 3
4 has an inner thin film 35 and an outer thin film 36, such as a polyethylene film, which respectively cover both the inner and outer surfaces.
【００１５】更に図２に示すように樹脂層３４の内外両
面を各々被覆する内側薄膜３５と外側薄膜３６の両端は
樹脂層３４を包囲するよう互に熱溶着等により接合され
ている。Further, as shown in FIG. 2, both ends of the inner thin film 35 and the outer thin film 36 respectively covering the inner and outer surfaces of the resin layer 34 are joined to each other by heat welding or the like so as to surround the resin layer 34.
【００１６】ベース２０のベース部２３の外周上に嵌装
する筒状のスリーブ３０の両端縁部外周上には周方向に
連続して伸びる環状の止水体４０が嵌装される。On the outer circumference of both end edges of the cylindrical sleeve 30 fitted on the outer circumference of the base portion 23 of the base 20, an annular water stop body 40 extending continuously in the circumferential direction is fitted.
【００１７】止水体４０は、例えば断面円形の環状であ
って、ゴム、合成樹脂のような不透水性を有する高分子
材料製、或いは水膨潤材料、例えばエーテル系ポリウレ
タンエラストマー、イソブチレン−無水マレイン酸共重
合体等の吸水性樹脂、またはこれら吸水性樹脂とプロピ
レンゴム、天然ゴム等の混合物によって形成される。The water blocking body 40 has, for example, an annular shape with a circular cross section and is made of a polymer material having impermeable property such as rubber or synthetic resin, or a water swelling material such as ether polyurethane elastomer, isobutylene-maleic anhydride. It is formed of a water absorbent resin such as a copolymer or a mixture of these water absorbent resins and propylene rubber, natural rubber or the like.
【００１８】次にこのように形成された補修用被覆体１
０を用いる管路補修方法について説明する。Next, the repair coating 1 thus formed
A pipe repairing method using 0 will be described.
【００１９】先ず補修用被覆体１０を、図５に断面を示
すように、係止孔２６、２７、２８と係止片２９が非係
合状態でベース部２３が縮径され、かつ縮径されたベー
ス部２３の外周上にスリーブ３０が一部折り畳まれた状
態に準備し、この被覆体１０を半径方向に拡径させるた
めの拡開機５０に装着する。First, as shown in the cross section of FIG. 5, the repair cover 10 has its base portion 23 reduced in diameter with the engagement holes 26, 27, 28 and the engagement piece 29 disengaged, and the diameter reduced. The sleeve 30 is prepared in a state where the sleeve 30 is partially folded on the outer circumference of the base portion 23 thus prepared, and is mounted on the expanding machine 50 for expanding the diameter of the covering body 10 in the radial direction.
【００２０】拡開機５０は、例えば図６に示すように軸
部５１と、この軸部５１に固定され、かつ圧力流体、例
えば圧縮空気等の供給により風船状に膨張する膨張部５
２とを有し、この膨張部５２を収縮させた状態で上記縮
径された補修用被覆体１０のベース部２３の内側に挿入
することにより補修用被覆体１０を拡開機５０に装着す
る。The expander 50 is, for example, as shown in FIG. 6, a shaft portion 51, and an expansion portion 5 fixed to the shaft portion 51 and expanded in a balloon shape by supplying a pressure fluid such as compressed air.
2, the expansion cover 52 is contracted and is inserted into the inside of the base portion 23 of the repair cover 10 having the reduced diameter, so that the repair cover 10 is mounted on the spreader 50.
【００２１】次いで地上に配置された流体源からホース
を介してニップル５３へ供給される圧縮空気により膨張
部５２が膨張して補修用被覆体１０が拡開機５０に対し
て変位しない程度にベース部２３に圧接して補修用被覆
体１０を拡開機５０に固定し、その状態に維持させる。Next, the base portion is expanded to such an extent that the expanding portion 52 is not expanded by the compressed air supplied to the nipple 53 from the fluid source arranged on the ground through the hose and the repair cover 10 is displaced with respect to the spreader 50. The repair cover 10 is fixed to the spreader 50 by being pressed against the contact hole 23 and maintained in that state.
【００２２】続いて補修用被覆体１０及び拡開機５０を
予め内周面１ａが洗浄され、必要に応じて付着したモル
タルや混入した木根を除くための表面処理が施された管
路１内のクラック発生部や継目等の補修箇所まで拡開機
５０に連結されたロープ５４を牽引することにより移動
させる。補修用被覆体１０及び拡開機５０の移動は、補
修用被覆体１０とともにテレビカメラを移動させつつ、
テレビカメラによる映像をモニタで監視することにより
所定位置へ移動させることができる。Subsequently, the inner surface 1a of the repair cover 10 and the spreader 50 is cleaned in advance, and if necessary, the inside of the conduit 1 which has been subjected to a surface treatment to remove adhering mortar and mixed roots. The rope 54 connected to the spreader 50 is pulled to move to a cracked portion or a repaired portion such as a seam. The movement of the repair cover 10 and the spreader 50 is performed by moving the television camera together with the repair cover 10,
It is possible to move to a predetermined position by monitoring the image from the TV camera on the monitor.
【００２３】補修用被覆体１０及び拡開機５０が管路１
内の補修箇所まで移動すると、補修箇所において、ニッ
プル５３を介して再び供給される圧縮空気により膨張部
５２を更に膨張させる。膨張部５２の膨張により補修用
被覆体１０のベース部２３が拡開され、いずれか１組の
係止孔２６、２７或いは２８に係合可能になる程度に拡
開される。その結果一部が折り畳まれたスリーブ３０は
円筒状に拡げられ、ベース部２３によってスリーブ３０
及びこのスリーブ３０上に嵌装する止水体４０は管路１
の内周面１ａに押圧され、かつ止水体４０はスリーブ３
０内に一部が沈降するとともに管路内周面１ａに圧接し
て弾性変形する。The repair covering 10 and the spreader 50 are connected to the conduit 1.
When it moves to the repaired part inside, the expanded part 52 is further expanded at the repaired part by the compressed air supplied again via the nipple 53. The base portion 23 of the repair cover 10 is expanded by the expansion of the expansion portion 52, and is expanded to such an extent that it can be engaged with any one of the locking holes 26, 27, or 28. As a result, the partially folded sleeve 30 is expanded into a cylindrical shape, and the sleeve portion 30 is expanded by the base portion 23.
And the water stop body 40 fitted on the sleeve 30 is
Is pressed by the inner peripheral surface 1a of the
A part of it settles in 0 and is elastically deformed by being pressed against the inner peripheral surface 1a of the conduit.
【００２４】ベース部２３による管路１の内周面１ａへ
の押圧に伴ってスリーブ３０は圧縮変形されて管路１の
内周面１ａと、ベース部２３と、止水体４０とによって
閉鎖された領域内に隙間なく充填される。The sleeve 30 is compressed and deformed as the base portion 23 presses the inner peripheral surface 1a of the conduit 1, and is closed by the inner peripheral surface 1a of the conduit 1, the base portion 23, and the water blocking body 40. It is filled in the filled area without any gap.
【００２５】次に膨張部５２内の圧縮空気を排出して膨
張部５２を収縮させた後、拡開機５０をテレビカメラと
ともに管路１内から撤去する。Next, after the compressed air in the expansion section 52 is discharged to contract the expansion section 52, the expander 50 together with the television camera is removed from the inside of the conduit 1.
【００２６】膨張部５２が圧縮空気等の排出によって収
縮すると、スリーブ３０及び止水体４０の復元によって
ベース部２３にベース部２３を縮径させる力が作用し、
係止片２９が係止可能な１組の係止孔２６、２７或いは
２８に係合する。これによりベース部２３は僅かに縮径
されるが、この縮径分は止水体４０及びスリーブ３０が
僅かに復元することによって吸収される。このためスリ
ーブ３０及び止水体４０は管路１内の内周面１ａにベー
ス部２３によって押圧され、かつ圧縮された状態に維持
され補修用被覆体１０は管路１内に設置される。When the expansion section 52 contracts due to the discharge of compressed air or the like, a force for reducing the diameter of the base section 23 acts on the base section 23 due to the restoration of the sleeve 30 and the water blocking body 40.
The locking piece 29 engages with a set of locking holes 26, 27 or 28 that can be locked. As a result, the diameter of the base portion 23 is slightly reduced, but the reduced diameter is absorbed by the water blocking body 40 and the sleeve 30 being slightly restored. Therefore, the sleeve 30 and the water blocking body 40 are pressed against the inner peripheral surface 1a in the pipeline 1 by the base portion 23 and are kept in a compressed state, and the repair coating 10 is installed in the pipeline 1.
【００２７】その後、時経過に伴ってスリーブ３０内の
常温硬化型熱硬化性樹脂が次第に硬化して管路１の内周
面１ａを被覆するスリーブ３０がガラス繊維等の補強繊
維からなる基材３１、３２によって補強された言わば高
強度を有する強化プラスチック（ＦＲＰ）となり、スリ
ーブ３０内周面に圧接するベース２０とともに管路１を
高強度で補強する。After that, the room temperature curable thermosetting resin in the sleeve 30 is gradually cured with time, and the sleeve 30 covering the inner peripheral surface 1a of the conduit 1 is made of a reinforcing fiber such as glass fiber. It becomes a so-called reinforced plastic (FRP) having high strength reinforced by 31, 32, and reinforces the conduit 1 with high strength together with the base 20 that is pressed against the inner peripheral surface of the sleeve 30.
【００２８】一方管路１の内周面１ａを被装する円筒状
のスリーブ３０の両端縁部外周と管路１との間がスリー
ブ３０の両端縁部外周上に嵌装される環状の止水体４０
によって水密的に接合維持され、仮に管路１に発生した
クラック等から管路内周面１ａと硬化したスリーブ３０
との間に地下水等が浸入した場合、或いは重なり合うベ
ース２０の両端部間の隙間や縁部２４と管路内周面１ａ
との隙間から管路１内を流れる流水等がベース部２３と
管路内周面１ａとの間に浸入した場合でもこれら止水体
４０によって浸水経路が遮断され充分な止水効果が確保
できる。On the other hand, an annular stopper is fitted between the outer circumference of both end edges of the cylindrical sleeve 30 covering the inner peripheral surface 1a of the pipe 1 and the outer circumference of both end edges of the sleeve 30. Water body 40
The sleeve 30 is watertightly joined and maintained by the water and is hardened from the inner peripheral surface 1a of the pipeline 1 due to a crack or the like generated in the pipeline 1.
When groundwater or the like infiltrates between the two, or the gap between the both ends of the overlapping base 20 or the edge 24 and the inner peripheral surface 1a of the conduit.
Even if running water or the like flowing in the pipe line 1 through the gap between the base portion 23 and the pipe inner peripheral surface 1a intrudes, the water blocking body 40 blocks the water inflow route and a sufficient water blocking effect can be secured.
【００２９】以上説明ではベース２０の外周上に嵌装す
る筒状のスリーブ３０の両端縁部外周に環状の止水体４
０を嵌装せしめたが、合成樹脂のような不透水性を有す
る高分子材料、或いは水膨潤性材料からなる帯状乃至紐
状の止水体、若しくは補強繊維、スポンジ材等からなる
帯状乃至紐状の芯材に液状ゴム、例えば液状膨張ゴムを
含浸せしめた帯状乃至紐状の止水体をスリーブ３０の端
縁部外周上に周方向に沿って巻回して設けることも可能
である。In the above description, the ring-shaped water stop body 4 is provided on the outer circumference of both end edges of the tubular sleeve 30 fitted on the outer circumference of the base 20.
0 is fitted, but a strip-shaped or string-shaped waterproof body made of a water-swellable material or a polymeric material having impermeable properties such as synthetic resin, or a strip-shaped or string-shaped strip made of reinforcing fibers, sponge material, etc. It is also possible to provide a strip-shaped or string-shaped waterproof body in which the core material is impregnated with liquid rubber, for example, liquid expanded rubber, around the outer periphery of the end edge portion of the sleeve 30 along the circumferential direction.
【００３０】また上記実施形態では、スリーブ３０の樹
脂層３４を２層の基材３１、３２に常温硬化性樹脂３３
を含浸させて形成したが基材は、補修用被覆体の要求強
度に相応して一層或いは適宜数積層した複数層に形成し
得る。Further, in the above-described embodiment, the resin layer 34 of the sleeve 30 is applied to the two layers of the base materials 31 and 32 and the room temperature curable resin 33.
The base material may be formed in a single layer or in a plurality of layers by appropriately laminating the base material according to the required strength of the repair coating.
【００３１】次に本発明における既設管路の補修用被覆
体の他の実施の形態を図７乃至図１０によって説明す
る。なお説明の便宜上図１乃至図６と対応する部分に同
一符号を付する。Next, another embodiment of the coating for repairing the existing pipeline according to the present invention will be described with reference to FIGS. For convenience of explanation, the same reference numerals are given to the portions corresponding to those in FIGS.
【００３２】図７は補修用被覆体６０の斜視図であって
図８は図７のＢ−Ｂ線断面図である。FIG. 7 is a perspective view of the repair cover 60, and FIG. 8 is a sectional view taken along line BB of FIG.
【００３３】補修用被覆体６０はベース２０、スリーブ
７０及び一対の止水体４０によって構成されている。ベ
ース２０は前記同様ステンレス鋼等の耐腐食性に優れる
金属材料、合成樹脂、形状記憶合金或いは形状記憶合成
樹脂製であって一端部２１が他端部２２の内側となるよ
う互に重なる筒状に巻回形成される。The repair cover 60 comprises a base 20, a sleeve 70 and a pair of water stop members 40. The base 20 is made of a metal material such as stainless steel having excellent corrosion resistance as described above, a synthetic resin, a shape memory alloy, or a shape memory synthetic resin, and has a cylindrical shape in which one end 21 is on the inside of the other end 22 and is overlapped with each other. Is formed by winding.
【００３４】そして弾性変形可能な細長いシート状のベ
ース部２３の両側端に沿ってスリーブ７０を両側から収
容するように湾曲した一対の縁部２４を有している。更
にベース部２３の一端部２１付近に形成された複数組の
係止孔及び他端部２２に付近に切り起し加工によってベ
ース２０の内方へ突出形成された係止片とにより構成さ
れる拡開保持手段２５が設けられている。Along the both sides of the elastically deformable elongated sheet-shaped base portion 23, there is a pair of curved edge portions 24 so as to accommodate the sleeve 70 from both sides. Further, it is constituted by a plurality of sets of locking holes formed near one end 21 of the base portion 23 and a locking piece which is formed to project inward of the base 20 by cutting and raising near the other end 22. The expansion holding means 25 is provided.
【００３５】一方スリーブ７０は、図９に一部破断説明
図を示すようにガラス繊維、ポリエステル繊維等の補強
繊維からなる筒状の基材を１層或いは複数積層し、本実
施形態では２層の基材７１、７２に未硬化状態の熱硬化
性樹脂、例えば不飽和ポリエステル系樹脂等の硬化性樹
脂７３を含浸させて形成した樹脂層７４と、この樹脂層
７４の内外両面を各々被覆するポリエチレンフィルム等
の内側薄膜７５及び外側薄膜７６とを有し、樹脂層７４
の内外両面を各々被覆する内側薄膜７５と外側薄膜７６
の両端は樹脂層７４を包囲するよう熱溶着等により接合
されている。On the other hand, the sleeve 70 is formed by laminating one or a plurality of tubular base materials made of reinforcing fibers such as glass fibers and polyester fibers as shown in the partially cutaway explanatory view in FIG. A resin layer 74 formed by impregnating the base materials 71 and 72 with an uncured thermosetting resin, for example, a curable resin 73 such as an unsaturated polyester resin, and both inner and outer surfaces of the resin layer 74 are coated. A resin layer 74 having an inner thin film 75 such as a polyethylene film and an outer thin film 76.
Inner thin film 75 and outer thin film 76 respectively covering both the inner and outer surfaces of
Both ends of are joined by heat welding or the like so as to surround the resin layer 74.
【００３６】補強繊維からなる基材７１、７２は、例え
ば図９に示すように周方向に対して傾斜して配列する複
数の繊維束が互に交差して編まれた筒状であって、周方
向に例えば１．３〜１．５倍、即ち１３０〜１５０％伸
長可能に構成され、スリーブ７０内側に配置されるベー
ス２０の拡開によって周方向に伸長するようになってい
る。The base materials 71 and 72 made of reinforcing fibers are, for example, as shown in FIG. 9, a tubular shape in which a plurality of fiber bundles arranged obliquely with respect to the circumferential direction are woven so as to cross each other, For example, it is configured to be expandable in the circumferential direction by 1.3 to 1.5 times, that is, 130 to 150%, and is expanded in the circumferential direction by expanding the base 20 arranged inside the sleeve 70.
【００３７】更にベース２０のベース部２３の外周上に
嵌装する管状のスリーブ７０の両端縁部外周上には周方
向に連続して伸びる環状の止水体４０が嵌装される。Further, on the outer circumference of both end edges of the tubular sleeve 70 fitted on the outer circumference of the base portion 23 of the base 20, an annular water stop body 40 extending continuously in the circumferential direction is fitted.
【００３８】次にこのように形成された補修用被覆体６
０を用いる管路補修方法について説明する。Next, the repair coating 6 thus formed
A pipe repairing method using 0 will be described.
【００３９】先ず補修用被覆体６０を、図１０に断面を
示すように拡開保持手段２５の係止孔と係合片が非係合
状態でベース部２３が縮径され、かつ縮径されたベース
部２３の外周上にスリーブ７０が嵌装された状態で準備
し、この被覆体を拡開機に装着する。First, in the repair cover 60, as shown in the cross section of FIG. 10, the diameter of the base portion 23 is reduced and the diameter of the base portion 23 is reduced with the engaging hole of the expansion holding means 25 and the engaging piece not engaged. The sleeve 70 is fitted on the outer circumference of the base portion 23, and the covering body is mounted on the spreader.
【００４０】そして補修用被覆体６０及び拡開機を管路
内に補修箇所まで搬入移動する。補修用被覆体６０およ
び拡開機が管路内の補修箇所まで移動すると、前記同様
拡開機により補修用被覆体６０のベース部２３が拡開さ
れ、ベース部２３の拡開に追従してスリーブ７０の基材
７１、７２が周方向に伸長せしめられ、スリーブ７０及
びスリーブ７０に嵌装された止水体４０が拡開され、拡
開保持手段２５が係合可能になる程度に拡開する。その
結果スリーブ７０は図１０に一点鎖線７０′で示すよう
に拡げられ、ベース部２３によってスリーブ７０及び止
水体４０は管路の内周面に押圧されて内周面に倣って変
形して接合する。Then, the repair cover 60 and the spreader are carried in and moved into the pipeline to the repair location. When the repair cover 60 and the expander move to the repair location in the pipe, the expander expands the base portion 23 of the repair cover 60, and the sleeve 70 follows the expansion of the base portion 23. The base materials 71 and 72 are expanded in the circumferential direction, the sleeve 70 and the water blocking body 40 fitted to the sleeve 70 are expanded, and the expansion holding means 25 is expanded to such an extent that it can be engaged. As a result, the sleeve 70 is expanded as shown by the alternate long and short dash line 70 ', and the sleeve 70 and the water blocking body 40 are pressed against the inner peripheral surface of the conduit by the base portion 23 and are deformed and joined along the inner peripheral surface. To do.
【００４１】ベース部２３による管路内周面への押圧に
伴ってスリーブ７０は圧縮変形されて管路内周面とベー
ス部２３と止水体４０とによって閉鎖された領域内に隙
間なく充填される。The sleeve 70 is compressed and deformed as the base portion 23 presses the inner peripheral surface of the conduit, and the sleeve 70 is filled with no gap in the area closed by the inner peripheral surface of the conduit, the base portion 23 and the water blocking body 40. It
【００４２】その後拡開機を収縮させて拡開機を管路内
から撤去する。拡開機の収縮に伴ってスリーブ７０及び
止水体４０の復元によってベース部２３に縮径させる力
が作用し、ベース部２３が僅かに縮径して拡開保持手段
２５が係合して補修用被覆体６０は管路内に設置され
る。Thereafter, the expander is contracted to remove the expander from the inside of the conduit. Along with the contraction of the expander, a force for reducing the diameter of the base portion 23 acts due to the restoration of the sleeve 70 and the water blocking body 40, the diameter of the base portion 23 is slightly reduced, and the expansion holding means 25 engages for repair. The covering body 60 is installed in the conduit.
【００４３】その後、スリーブ７０内の熱硬化性樹脂が
時間経過に伴い常温状態で次第に硬化して管路の内周面
を被覆するスリーブ７０が補強繊維からなる基材７１、
７２によって補強された言わば高強度を有する強化プラ
スチックとなり、スリーブ７０内に圧接するベース２０
とともに管路を高強度で補強する。After that, the thermosetting resin in the sleeve 70 is gradually cured at room temperature with the passage of time, and the sleeve 70 covering the inner peripheral surface of the conduit is made of a reinforcing fiber 71.
It becomes a reinforced plastic having a high strength, so to speak, reinforced by 72, and is pressed against the inside of the sleeve 70.
At the same time, it reinforces the pipeline with high strength.
【００４４】一方管路内周面を被覆する円筒状のスリー
ブ７０との両端縁外周と管路との間が止水体４０によっ
て水密的に接合維持され前記同様止水効果が確保でき
る。On the other hand, the outer periphery of both ends of the cylindrical sleeve 70 covering the inner peripheral surface of the pipe and the outer periphery of the pipe are watertightly joined and maintained by the water blocking body 40, and the same water blocking effect can be secured.
【００４５】また以上説明した実施形態において筒状の
基材に常温硬化型熱硬化性樹脂を含浸させてスリーブの
樹脂層を形成したが、常温硬化型熱硬化性樹脂に替えて
中・高温型熱硬化性樹脂或いは熱可塑性樹脂等他の硬化
性樹脂を用いることも可能であり、中・高温型熱硬化性
樹脂或いは熱可塑性樹脂を用いる場合には、補修用被覆
体を管路内に設置した後、加熱装置によって加熱する必
要がある。Further, in the embodiment described above, the resin layer of the sleeve is formed by impregnating the tubular base material with the room temperature curing type thermosetting resin. It is also possible to use other curable resins such as thermosetting resins or thermoplastic resins. When using medium / high temperature type thermosetting resins or thermoplastic resins, a repair coating is installed in the pipeline. After that, it is necessary to heat with a heating device.
【００４６】[0046]
【発明の効果】以上説明した本発明による既設管路の補
修用被覆体によると、拡開可能な筒状に巻かれ、拡開保
持手段によって拡開状態に保持されるシート状のベース
外周上を筒状の基材に未硬化状態の硬化性樹脂を含浸せ
しめた樹脂層を具備する筒状のスリーブで被装し、かつ
スリーブの両端縁部外周上にスリーブ端縁部と管路内周
面とを水密的に接合する止水体とを有することから、補
修用被覆体を管路に装着した状態において、スリーブの
内外周面に段差がなく均一な厚さに形成されることか
ら、管路内周面が基材によって補強された硬化性樹脂を
有するスリーブ及び拡開状態に保持されるベースによっ
て均一に強固に補強され、かつスリーブ外周と止水体と
の接合性に優れ、仮に管路に発生したクラック等から管
路とスリーブとの間に地下水等が浸入した場合でも管路
内に連通する浸水経路が止水体によって遮断され充分な
止水効果が確保でき、長期間に亘る安定した管路補修効
果が得られる等本発明特有の効果を有する。According to the above-described cover for repairing an existing pipeline according to the present invention, on the outer periphery of a sheet-shaped base which is wound in a expandable tubular shape and is held in an expanded state by expansion holding means. Is covered with a cylindrical sleeve having a resin layer in which a uncured curable resin is impregnated into a cylindrical base material, and the sleeve end edge and the inner circumference of the pipe are provided on the outer circumference of both end edges of the sleeve. Since it has a water blocking body that joins the surface in a watertight manner, the inner and outer peripheral surfaces of the sleeve are formed to have a uniform thickness without a step when the repair coating is attached to the pipeline. The inner peripheral surface of the passage is uniformly and strongly reinforced by the sleeve having a curable resin reinforced by the base material and the base held in the expanded state, and the outer periphery of the sleeve and the water blocking body are excellent in jointability. Between the pipeline and the sleeve due to cracks etc. Even when infiltration of groundwater etc., the inundation route communicating with the inside of the pipeline is blocked by the water blocking body and a sufficient water blocking effect can be secured, and a stable pipeline repairing effect for a long period of time can be obtained. Have.
【図１】本発明における補修用被覆体の一実施形態を示
す斜視図である。FIG. 1 is a perspective view showing an embodiment of a repair cover according to the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】本実施形態の補修用被覆体に用いられるベース
の展開斜視図である。FIG. 3 is an exploded perspective view of a base used for the repair cover of the present embodiment.
【図４】同じく本実施形態の補修用被覆体に用いられる
スリーブの一部破断説明図である。FIG. 4 is a partially cutaway explanatory view of a sleeve similarly used in the repair cover of the present embodiment.
【図５】補修用被覆体による管路補修方法の説明図であ
る。FIG. 5 is an explanatory diagram of a method for repairing a conduit by a repair cover.
【図６】同じく補修用被覆体による管路補修方法の説明
図である。FIG. 6 is an explanatory diagram of a pipe repair method using a repair cover.
【図７】本発明における補修用被覆体の他の実施形態を
示す斜視図である。FIG. 7 is a perspective view showing another embodiment of the repair cover according to the present invention.
【図８】図７のＢ−Ｂ線断面図である。FIG. 8 is a sectional view taken along line BB of FIG. 7;
【図９】同じく本実施形態の補修用被覆体に用いられる
スリーブの一部破断説明図である。FIG. 9 is a partially cutaway explanatory view of a sleeve similarly used in the repair cover of the present embodiment.
【図１０】補修用被覆体による管路補修方法の説明図で
ある。FIG. 10 is an explanatory diagram of a method for repairing a conduit with a repair cover.
１ 管路 １ａ 内周面 １０ 補修用被覆体 ２０ ベース ２５ 拡開保持手段 ３０ スリーブ ３１，３２ 基材 ３３ 常温硬化性樹脂 ３４ 樹脂層 ３５ 内側薄膜 ３６ 外側薄膜 ４０ 止水体 ６０ 補修用被覆体 ７０ スリーブ ７１，７２ 基材 ７３ 常温硬化性樹脂 ７４ 樹脂層 ７５ 内側薄膜 ７６ 外側薄膜 DESCRIPTION OF SYMBOLS 1 Pipe line 1a Inner peripheral surface 10 Repair cover 20 Base 25 Expansion holding means 30 Sleeves 31, 32 Base material 33 Room temperature curable resin 34 Resin layer 35 Inner thin film 36 Outer thin film 40 Water blocking body 60 Repair coating 70 Sleeve 71, 72 Base material 73 Room temperature curable resin 74 Resin layer 75 Inner thin film 76 Outer thin film
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 105:08 Ｂ２９Ｌ 23:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location // B29K 105: 08 B29L 23:00
Claims (6)
管路の補修用被覆体において、拡開可能な筒状に巻かれ
たシート状のベースと、筒状の基材に未硬化状態の硬化
性樹脂を含浸せしめた樹脂層を具備し、かつ前記筒状に
巻かれたベース外周上を被装する筒状のスリーブと、ス
リーブ両端縁部外周上に各々周方向に沿って設けられス
リーブ端縁部外周部と管路内周面とを水密的に接合する
環状の止水体と、ベースを拡開状態に保持する拡開保持
手段とを有することを特徴とする既設管路の補修用被覆
体。1. A cover for repairing an existing pipeline for covering and repairing an inner peripheral surface of the existing pipeline, comprising: a sheet-shaped base that can be expanded and a tubular base and a tubular base material. A cylindrical sleeve having a resin layer impregnated with an uncured curable resin and covering the outer circumference of the cylindrically wound base, and the outer circumferences of both end edges of the sleeve along the circumferential direction. Existing pipe, which is provided with an annular water stop body that watertightly joins the outer peripheral portion of the sleeve end edge portion and the inner peripheral surface of the pipe line, and an expansion holding means that holds the base in an expanded state. Cover for road repair.
る内側薄膜及び外側薄膜を有する請求項１に記載の既設
管路の補修用被覆体。2. The cover for repairing an existing pipeline according to claim 1, wherein the sleeve has an inner thin film and an outer thin film that cover the inner and outer peripheral surfaces of the resin layer.
複数積層される請求項１または２に記載の既設管路の補
修用被覆体。3. The covering for repairing an existing pipeline according to claim 1, wherein a plurality of tubular base materials impregnated with a curable resin are laminated.
布である請求項１〜３のいずれか１つに記載の既設管路
の補修用被覆体。4. The cover for repairing an existing pipeline according to claim 1, wherein the base material is a woven or non-woven fabric made of reinforcing fibers.
管路の補修用被覆体において、拡開可能に巻かれたシー
ト状のベースと、周方向に伸長可能な筒状の基材に未硬
化状態の硬化性樹脂を含浸せしめた樹脂層を具備する前
記筒状に巻かれたベース外周上を被装する筒状のスリー
ブと、スリーブ両端縁部外周上に各々周方向に沿って設
けられてスリーブ端縁部外周部と管路内周面とを水密的
に接合する環状の止水体と、ベースを拡開状態に保持す
る拡開保持手段とを有し、スリーブの拡開に伴って基材
が周方向に伸長せしめられることを特徴とする既設管路
の補修用被覆体。5. A cover for repairing an existing pipeline for covering the inner peripheral surface of the existing pipeline and repairing the same, wherein a sheet-shaped base that can be expanded and a tubular shape that can extend in the circumferential direction. A cylindrical sleeve covering the outer circumference of the cylindrically wound base, which comprises a resin layer in which a base material is impregnated with a curable resin, and a circumferential sleeve on each outer circumference of both end edges of the sleeve. An annular water stop body provided along the outer periphery of the sleeve end edge portion and the inner peripheral surface of the conduit in a watertight manner, and an expansion holding means for holding the base in an expanded state. A cover for repairing an existing pipeline, wherein the base material is stretched in the circumferential direction with opening.
て傾斜して配列する複数の繊維束が互に交差して編まれ
た筒状である請求５に記載の既設管路の補修用被覆体。6. The repair of an existing pipeline according to claim 5, wherein the base material is a reinforcing fiber, and is a tubular shape in which a plurality of fiber bundles that are arranged to be inclined with respect to the circumferential direction cross each other and are knitted. For body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7284101A JPH09123278A (en) | 1995-10-31 | 1995-10-31 | Covering body for repair of existing pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7284101A JPH09123278A (en) | 1995-10-31 | 1995-10-31 | Covering body for repair of existing pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09123278A true JPH09123278A (en) | 1997-05-13 |
Family
ID=17674221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7284101A Pending JPH09123278A (en) | 1995-10-31 | 1995-10-31 | Covering body for repair of existing pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09123278A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100717833B1 (en) * | 2005-12-09 | 2007-05-11 | 주식회사 한강개발 | Watertight jointing band for a pipe repair material and pipe repair method using it |
| KR100770764B1 (en) * | 2006-09-07 | 2007-10-26 | 주식회사 한강개발 | Pipe repair method of concrete structure using face type heating element sheet |
| KR200465270Y1 (en) * | 2011-05-17 | 2013-02-08 | 대원인더스트리얼 주식회사 | A packer for sealing in the pipe |
| JP5903178B1 (en) * | 2015-03-31 | 2016-04-13 | 関東天然瓦斯開発株式会社 | Attaching method of covering member to inner wall of circular pipe and shaft |
| JP2016190387A (en) * | 2015-03-31 | 2016-11-10 | 吉佳エンジニアリング株式会社 | Pipeline repairing structure |
-
1995
- 1995-10-31 JP JP7284101A patent/JPH09123278A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100717833B1 (en) * | 2005-12-09 | 2007-05-11 | 주식회사 한강개발 | Watertight jointing band for a pipe repair material and pipe repair method using it |
| KR100770764B1 (en) * | 2006-09-07 | 2007-10-26 | 주식회사 한강개발 | Pipe repair method of concrete structure using face type heating element sheet |
| KR200465270Y1 (en) * | 2011-05-17 | 2013-02-08 | 대원인더스트리얼 주식회사 | A packer for sealing in the pipe |
| JP5903178B1 (en) * | 2015-03-31 | 2016-04-13 | 関東天然瓦斯開発株式会社 | Attaching method of covering member to inner wall of circular pipe and shaft |
| WO2016158902A1 (en) * | 2015-03-31 | 2016-10-06 | 関東天然瓦斯開発株式会社 | Method for installing cover member onto inner wall of circular tube or vertical shaft |
| JP2016190387A (en) * | 2015-03-31 | 2016-11-10 | 吉佳エンジニアリング株式会社 | Pipeline repairing structure |
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