JP7501848B2

JP7501848B2 - Pipeline rehabilitation method

Info

Publication number: JP7501848B2
Application number: JP2020013418A
Authority: JP
Inventors: 伸一谷川; 良一郎中村; 晃介鈴木; 裕久谷室; 良平桔川; 太一宇賀
Original assignee: Kubota ChemiX Co Ltd
Current assignee: Kubota ChemiX Co Ltd
Priority date: 2020-01-30
Filing date: 2020-01-30
Publication date: 2024-06-18
Anticipated expiration: 2040-01-30
Also published as: JP2021119044A

Description

この発明は、ライニング部材を螺旋状に巻き回して製管した螺旋管を用いて既設管を更生する管路更生工法に関する。 This invention relates to a pipeline rehabilitation method that rehabilitates existing pipes using a helical pipe made by winding a lining member in a spiral shape.

従来の管路更生工法の一例が特許文献１に開示される。特許文献１の管路更生工法では、既設管の内面に沿ってライニング部材を螺旋状に巻き回し、螺旋状に巻き回したライニング部材の隣り合う側縁部どうしを連結部材によって連結して螺旋管を形成することで、既設管内に螺旋管（ライニング管）を施工する。この際、連結部材は、ライニング部材の内面側から取り付けられる。 One example of a conventional pipeline rehabilitation method is disclosed in Patent Document 1. In the pipeline rehabilitation method of Patent Document 1, a lining member is wound in a spiral shape along the inner surface of the existing pipe, and adjacent side edges of the spirally wound lining member are connected with a connecting member to form a spiral pipe, thereby constructing a spiral pipe (lining pipe) inside the existing pipe. In this case, the connecting member is attached from the inner surface side of the lining member.

また、従来の管路更生工法の他の一例が特許文献２に開示される。特許文献２の管路更生工法では、両側縁部に接合部が形成されたライニング部材（帯状部材）を地上からマンホール内に引き込み、マンホール内に設置された製管機を用いて、ライニング部材を螺旋状に巻き回して隣接する接合部同士を接合して螺旋管（更生管）を製管する。そして、製管した螺旋管を既設管内に順次送り込むことで、既設管内に螺旋管を施工する。 Another example of a conventional pipeline rehabilitation method is disclosed in Patent Document 2. In the pipeline rehabilitation method of Patent Document 2, a lining member (belt-shaped member) with joints formed on both side edges is pulled into a manhole from above ground, and a pipe-making machine installed in the manhole is used to spirally wind the lining member and join adjacent joints to produce a helical pipe (rehabilitated pipe). The helical pipe is then sequentially fed into the existing pipe, whereby the helical pipe is installed.

特許第６５５９９２０号公報Patent No. 6559920 特開２０１５－１０５６５８号公報JP 2015-105658 A

特許文献１の技術は、内部に作業者が入って作業をすることが可能な口径（少なくとも８００ｍｍ以上の口径）を有する既設管の更生に用いられるものである。このため、内部に作業者が入って作業をすることが難しい中口径（たとえば３００以上１０００ｍｍ以下の口径）の既設管の更生に対応できる管路更生工法が望まれる。 The technology in Patent Document 1 is used to rehabilitate existing pipes with a diameter (at least 800 mm or more) that allows workers to enter and work inside. For this reason, there is a demand for a pipeline rehabilitation method that can accommodate the rehabilitation of existing medium-diameter pipes (for example, diameters between 300 and 1000 mm) that are difficult for workers to enter and work inside.

一方、特許文献２の技術では、マンホール内で製管するので、中口径の既設管の更生にも対応可能である。しかしながら、特許文献２の技術では、ライニング部材の側縁部どうしを直接連結して螺旋管を形成するので、螺旋管を形成するときに、ライニング部材の位置決めと嵌合とを同時に行う必要がある。このため、隣り合うライニング部材の周長（口径）を合わせることが難しく、螺旋管を適切に形成できない恐れがある。 On the other hand, the technology in Patent Document 2 manufactures pipes inside manholes, so it can also be used to rehabilitate existing medium-diameter pipes. However, with the technology in Patent Document 2, the side edges of the lining members are directly connected to form the spiral pipe, so when forming the spiral pipe, it is necessary to position and fit the lining members simultaneously. This makes it difficult to match the circumference (diameter) of adjacent lining members, and there is a risk that the spiral pipe cannot be formed properly.

また、特許文献２には、ライニング部材の側縁部どうしを連結部材（嵌合材）で連結することも可能であることが開示されている。しかしながら、特許文献２の連結部材は、ライニング部材の内面側から取り付けられるものであるため、中口径の既設管に対応する比較的口径の小さい螺旋管を製管することが難しい。 Patent Document 2 also discloses that it is possible to connect the side edges of the lining members with connecting members (fitting members). However, because the connecting members in Patent Document 2 are attached from the inside surface side of the lining members, it is difficult to manufacture a relatively small-diameter spiral pipe that corresponds to an existing medium-diameter pipe.

それゆえに、この発明の主たる目的は、新規な、管更生部材を提供することである。 Therefore, the primary objective of this invention is to provide a novel pipe rehabilitation component.

この発明の他の目的は、螺旋管の製管が容易であり、中口径の既設管を適切に更生できる、管路更生工法を提供することである。 Another object of the invention is to provide a pipeline rehabilitation method that makes it easy to manufacture helical pipes and can properly rehabilitate existing medium-diameter pipes.

第１の発明は、ライニング部材を螺旋状に巻き回して製管した螺旋管を用いて既設管を更生する管路更生工法であって、マンホール内でライニング部材を螺旋状に巻き回すと共に、螺旋状に巻き回したライニング部材の外面側から連結部材を取り付けて当該ライニング部材の隣り合う側縁部どうしを連結して螺旋管を形成しながら、形成した螺旋管を前記マンホール内から既設管内に順次送り込んでいく工程を含み、ライニング部材は、螺旋状に巻き回したときの外面側の両側部のそれぞれに形成される第１係合部を備え、連結部材は、第１係合部のそれぞれと係合される第２係合部を備え、第１係合部は、ライニング部材の長手方向に延びる第１突条と、第１突条の一方側面の先端部に形成される第１係止片とを有し、第２係合部は、連結部材の長手方向に延びる第２突条と、第２突条の一方側面に形成され、第１係止片と係合される第２係止片とを有する、管路更生工法である。 The first invention is a pipeline rehabilitation method for rehabilitating an existing pipe by using a helical pipe produced by helically winding a lining member, the method including a step of helically winding the lining member in a manhole, attaching a connecting member to the outer surface side of the helically wound lining member to connect adjacent side edge portions of the lining member to form a helical pipe, and sequentially feeding the formed helical pipe from inside the manhole into the existing pipe, the lining member being helically wound. and the connecting member has second engaging portions which engage with the respective first engaging portions, the first engaging portions having a first protrusion extending in the longitudinal direction of the lining member and a first locking piece formed at a tip portion of one side of the first protrusion, and the second engaging portion having a second protrusion extending in the longitudinal direction of the connecting member and a second locking piece formed on one side of the second protrusion and which engages with the first locking piece.

第２の発明は、第１の発明に従属し、連結部材によってライニング部材の隣り合う側縁部どうしを連結して螺旋管を形成した状態において、連結部材の最外部は、螺旋管の径方向におけるライニング部材の最外部よりも外側に位置する。 The second invention is dependent on the first invention, and when adjacent side edge portions of the lining member are connected to each other by a connecting member to form a helical pipe, the outermost portion of the connecting member is positioned outer than the outermost portion of the lining member in the radial direction of the helical pipe.

第３の発明は、第１または第２の発明に従属し、ライニング部材を螺旋状に巻き回すときには、ライニング部材の側縁どうしを突き合わせる A third invention is according to the first or second invention, and when the lining member is wound in a spiral shape, the side edges of the lining member are butted against each other.

第３の発明によれば、螺旋管を製管する際にライニング部材の側縁どうしを突き合わせた状態にするので、螺旋管の軸方向におけるライニング部材の位置決めが容易となり、螺旋管を容易に製管できる。 According to the third invention, when manufacturing the helical pipe, the side edges of the lining members are butted against each other, making it easy to position the lining members in the axial direction of the helical pipe, and making the helical pipe easy.

この発明によれば、ライニング部材に対して連結部材をライニング部材の外面側から取り付けるので、比較的小さい口径の螺旋管であっても製管し易く、内部に作業者が入って作業をすることが難しい中口径の既設管を適切に更生できる。また、ライニング部材および連結部材の２つの部材を用いて螺旋管を形成するので、隣り合うライニング部材の周長を合わせ易く、軸方向の全長に亘って口径が一様な螺旋管を適切に形成できる。 According to this invention, since the connecting member is attached to the lining member from the outer surface side of the lining member, it is easy to manufacture a spiral pipe with a relatively small diameter, and it is possible to properly rehabilitate existing medium-diameter pipes that are difficult for workers to enter and work inside. In addition, since the spiral pipe is formed using two members, the lining member and the connecting member, it is easy to match the circumferential lengths of adjacent lining members, and it is possible to properly form a spiral pipe with a uniform diameter along its entire axial length.

この発明の上述の目的、その他の目的、特徴および利点は、図面を参照して行う後述の実施例の詳細な説明から一層明らかとなろう。 The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments given below with reference to the drawings.

この発明の一実施例である管路更生工法によって既設管を更生する様子を模式的に示す図解図である。1 is a schematic diagram showing a state in which an existing pipe is rehabilitated by a pipe rehabilitation method according to one embodiment of the present invention; FIG. 管更生部材を用いて螺旋管を形成するときの様子を示す図解図である。1 is a diagram showing how a spiral pipe is formed using a pipe rehabilitation member; FIG. 図２の管更生部材が備えるライニング部材の一例を示す斜視図である。3 is a perspective view showing an example of a lining member provided in the pipe rehabilitation member of FIG. 2. 図３のライニング部材を示す断面図である。FIG. 4 is a cross-sectional view showing the lining member of FIG. 3 . 図２の管更生部材が備える連結部材の一例を示す斜視図である。3 is a perspective view showing an example of a connecting member provided in the pipe rehabilitation member of FIG. 2. 図５の連結部材を示す断面図である。FIG. 6 is a cross-sectional view showing the connecting member of FIG. 5 . 図５の連結部材を用いて図３のライニング部材の側縁部どうしを連結した様子を示す断面図である。6 is a cross-sectional view showing the state in which the side edges of the lining member of FIG. 3 are connected to each other using the connecting member of FIG. 5 . 図３のライニング部材と図５の連結部材との連結部分を示す断面図である。6 is a cross-sectional view showing a connection portion between the lining member of FIG. 3 and the connecting member of FIG. 5 . 図１の管路更生工法における製管開始時の工程を説明するための図解図である。FIG. 2 is a diagram for explaining the process at the start of pipe manufacturing in the pipeline rehabilitation method of FIG. 1 . 図１の管路更生工法を用いて既設管を更生した様子を示す断面図である。FIG. 2 is a cross-sectional view showing a state in which an existing pipe has been rehabilitated using the pipe rehabilitation method of FIG. 1.

図１を参照して、この発明の一実施例である管路更生工法は、螺旋管（ライニング管）１０２によって既設管１００を更生する元押し式の管路更生工法である。詳細は後述するように、この管路更生工法では、発進側マンホール１１０内でライニング部材１２を螺旋状に巻き回して螺旋管１０２を製管しながら、製管した螺旋管１０２を既設管１００内に順次送り込んでいく。また、この管路更生工法では、ライニング部材１２と、ライニング部材１２の側縁部どうしを連結する連結部材１４とで構成される管更生部材１０を用いて螺旋管１０２を形成する。 Referring to FIG. 1, one embodiment of the pipeline rehabilitation method of the present invention is a push-type pipeline rehabilitation method in which an existing pipe 100 is rehabilitated with a helical pipe (lining pipe) 102. As will be described in detail later, in this pipeline rehabilitation method, the lining member 12 is wound in a spiral shape inside a starting manhole 110 to produce the helical pipe 102, while the produced helical pipe 102 is fed sequentially into the existing pipe 100. In this pipeline rehabilitation method, the helical pipe 102 is formed using a pipe rehabilitation member 10 composed of the lining member 12 and a connecting member 14 that connects the side edges of the lining member 12 together.

なお、この発明に係る管路更生工法は、鉄筋コンクリート製、合成樹脂製および金属製などの種々の既設管１００の更生に用いることが可能であり、特に、内部に作業者が入って作業をすることが難しい３００ｍｍ以上１０００ｍｍ以下の中口径を有する下水管の更生に好適に用いられる。ただし、この管路更生工法は、１０００ｍｍを超える口径を有する既設管１００の更生に用いることも可能である。 The pipe rehabilitation method according to the present invention can be used to rehabilitate various types of existing pipes 100, such as those made of reinforced concrete, synthetic resin, and metal, and is particularly suitable for rehabilitating sewer pipes with a medium diameter of 300 mm to 1000 mm, where it is difficult for workers to enter the interior to perform work. However, this pipe rehabilitation method can also be used to rehabilitate existing pipes 100 with a diameter exceeding 1000 mm.

先ず、管路更生工法の具体的な説明に先立ち、この実施例で用いる管更生部材１０の一例について説明する。図２に示すように、管更生部材１０は、長尺帯板状のライニング部材１２と、螺旋状に巻き回したライニング部材１２の隣り合う側縁部どうしを連結する長尺帯板状の連結部材１４とを含む。 First, before describing the specifics of the pipeline rehabilitation method, an example of the pipe rehabilitation member 10 used in this embodiment will be described. As shown in FIG. 2, the pipe rehabilitation member 10 includes a long strip-shaped lining member 12 and a long strip-shaped connecting member 14 that connects adjacent side edges of the spirally wound lining member 12.

この実施例のライニング部材１２は、螺旋状に巻き回したときの外面側に連結部材１４との嵌合部（第１嵌合部２２）を備えており、連結部材１４は、螺旋状に巻き回したライニング部材１２の外面側からライニング部材１２に取り付けられる。なお、管更生部材１０を用いて形成する螺旋管１０２の外径は、既設管１００の内径よりも少し小さい大きさに設定される。以下、ライニング部材１２および連結部材１４の構成について具体的に説明する。 The lining member 12 in this embodiment has an engaging portion (first engaging portion 22) with the connecting member 14 on the outer surface side when wound in a spiral shape, and the connecting member 14 is attached to the lining member 12 from the outer surface side of the lining member 12 wound in a spiral shape. The outer diameter of the spiral pipe 102 formed using the pipe rehabilitation member 10 is set to a size slightly smaller than the inner diameter of the existing pipe 100. The configurations of the lining member 12 and the connecting member 14 are specifically described below.

図３および図４に示すように、ライニング部材１２は、螺旋管１０２の主構成要素となる長尺の部材であって、帯板状の基体（ライニング基体）２０を含む。基体２０の一方主面２０ａは、螺旋管１０２の内面を構成する面であり、平滑面となっている。基体２０の幅は、たとえば７５ｍｍであり、基体２０の厚み（肉厚）は、たとえば３ｍｍである。 As shown in Figures 3 and 4, the lining member 12 is a long member that is the main component of the spiral pipe 102, and includes a strip-shaped base (lining base) 20. One main surface 20a of the base 20 is a surface that constitutes the inner surface of the spiral pipe 102, and is a smooth surface. The width of the base 20 is, for example, 75 mm, and the thickness (wall thickness) of the base 20 is, for example, 3 mm.

基体２０の他方主面２０ｂ側、つまりライニング部材１２を螺旋状に巻き回したときの外面側の両側部のそれぞれには、後述する連結部材１４の第２嵌合部５２と嵌め合わされる第１嵌合部２２が形成される。第１嵌合部２２は、基体２０の他方主面２０ｂの両側縁部に形成される第１係合部２４と、第１係合部２４よりも基体２０の幅方向における内側に、第１係合部２４と所定間隔をあけて形成される第３係合部２６とを含む。 On both sides of the other main surface 20b of the base 20, that is, on the outer surface side when the lining member 12 is wound in a spiral shape, a first fitting portion 22 is formed to fit into a second fitting portion 52 of the connecting member 14 described later. The first fitting portion 22 includes a first engagement portion 24 formed on both side edges of the other main surface 20b of the base 20, and a third engagement portion 26 formed at a predetermined distance from the first engagement portion 24, on the inner side in the width direction of the base 20 than the first engagement portion 24.

第１係合部２４は、後述する連結部材１４の第２係合部５４と係合される部分である。この第１係合部２４は、基体２０の長手方向に延びる第１突条２８を有する。この第１突条２８の一方側面２８ａ（基体２０の幅方向における内側の面）の先端部には、第１係止片３０が形成される。また、第１突条２８の他方側面２８ｂは、基体２０から離れるに従って基体２０の幅方向における内側に傾斜する傾斜面になっている。 The first engagement portion 24 is a portion that engages with the second engagement portion 54 of the connecting member 14, which will be described later. This first engagement portion 24 has a first ridge 28 that extends in the longitudinal direction of the base body 20. A first locking piece 30 is formed at the tip of one side surface 28a of this first ridge 28 (the inner surface in the width direction of the base body 20). In addition, the other side surface 28b of the first ridge 28 forms an inclined surface that slopes inward in the width direction of the base body 20 as it moves away from the base body 20.

第３係合部２６は、後述する連結部材１４の第４係合部５６と係合される部分である。この第３係合部２６は、基体２０の長手方向に延びる第３突条３２を有する。この第３突条３２の一方側面３２ａ（基体２０の幅方向における内側の面）の先端部には、第３係止片３４が形成される。また、第３突条３２の他方側面３２ｂの先端部には、基体２０から離れるに従って基体２０の幅方向における内側に傾斜する傾斜面が形成される。 The third engagement portion 26 is a portion that engages with a fourth engagement portion 56 of the connecting member 14, which will be described later. This third engagement portion 26 has a third ridge 32 that extends in the longitudinal direction of the base 20. A third locking piece 34 is formed at the tip of one side surface 32a of this third ridge 32 (the inner surface in the width direction of the base 20). In addition, an inclined surface is formed at the tip of the other side surface 32b of the third ridge 32, which slopes inward in the width direction of the base 20 as it moves away from the base 20.

また、基体２０の幅方向中央部には、基体２０の一部を他方主面２０ｂ側に突出するように幅方向に弛ませた変位吸収部３６が形成される。変位吸収部３６の肉厚は、基体２０の他の部分の肉厚と略同じ大きさである。変位吸収部３６は、一方主面２０ａから離れるに従って幅方向に膨らむように形成されており、幅方向両側部のそれぞれに形成される屈曲部３８と、屈曲部３８どうしを連結する連結部４０とを有する。連結部４０は、屈曲部３８よりも曲率が小さくなるように形成されており、連結部４０の内面４０ａは、平坦面となっている。また、変位吸収部３６の基端部間には、隙間４２が形成されている。隙間４２の幅は、たとえば１ｍｍである。 In addition, a displacement absorbing section 36 is formed in the center of the width of the base 20, in which a part of the base 20 is loosened in the width direction so as to protrude toward the other main surface 20b. The thickness of the displacement absorbing section 36 is approximately the same as the thickness of the other parts of the base 20. The displacement absorbing section 36 is formed so as to expand in the width direction as it moves away from the one main surface 20a, and has bent sections 38 formed on both sides in the width direction, and connecting sections 40 that connect the bent sections 38 together. The connecting sections 40 are formed so as to have a smaller curvature than the bent sections 38, and the inner surface 40a of the connecting sections 40 is a flat surface. A gap 42 is formed between the base ends of the displacement absorbing sections 36. The width of the gap 42 is, for example, 1 mm.

このように基体２０が変位吸収部３６を有することで、ライニング部材１２を用いて形成された螺旋管１０２は、この変位吸収部３６の部分において、軸方向および曲がり方向に変形し易くなる。このため、後述のように既設管１００内に螺旋管１０２を送り込むときには、変位吸収部３６が変形することにより、既設管１００の曲り部、屈曲部および段差部に螺旋管１０２が追従可能となる。また、施工後において、地震が発生した際には、変位吸収部３６が伸長して軸方向変位を吸収するので、ライニング部材１２の側縁部どうしの連結部分における変形が抑制され、ライニング部材１２の第１嵌合部２２と連結部材１４の第２嵌合部５２との嵌合が適切に保持される。 Because the base 20 has the displacement absorbing section 36 in this way, the spiral pipe 102 formed using the lining member 12 is easily deformed in the axial direction and the bending direction at the displacement absorbing section 36. Therefore, when the spiral pipe 102 is fed into the existing pipe 100 as described below, the deformation of the displacement absorbing section 36 allows the spiral pipe 102 to follow the bends, bends, and steps of the existing pipe 100. In addition, after construction, when an earthquake occurs, the displacement absorbing section 36 expands to absorb the axial displacement, suppressing deformation at the connection portion between the side edges of the lining member 12, and appropriately maintaining the fit between the first fitting section 22 of the lining member 12 and the second fitting section 52 of the connecting member 14.

また、変位吸収部３６が２つの屈曲部３８と屈曲部３８よりも曲率が小さい連結部４０とを有することで、変位吸収部３６の高さ方向（螺旋管１０２の径方向）の大きさを抑制しつつ、変位吸収部３６の幅方向（螺旋管１０２の軸方向）における伸長可能幅を大きくすることができる。さらに、変位吸収部３６の基端部間に隙間４２を有することで、変位吸収部３６が幅方向に縮むことも可能となる。さらにまた、変位吸収部３６が一方主面２０ａから離れるに従って幅方向に膨らむように形成されることで、変位吸収部３６の幅方向外側面が充填材１０４（図１０参照）に対するアンカ部としても機能する。 In addition, since the displacement absorbing section 36 has two bent sections 38 and a connecting section 40 with a smaller curvature than the bent sections 38, it is possible to increase the extensible width of the displacement absorbing section 36 in the width direction (axial direction of the spiral tube 102) while suppressing the size of the displacement absorbing section 36 in the height direction (radial direction of the spiral tube 102). Furthermore, since there is a gap 42 between the base ends of the displacement absorbing section 36, it is also possible for the displacement absorbing section 36 to contract in the width direction. Furthermore, since the displacement absorbing section 36 is formed so as to expand in the width direction as it moves away from the one main surface 20a, the outer surface in the width direction of the displacement absorbing section 36 also functions as an anchor section for the filler 104 (see FIG. 10).

このようなライニング部材１２は、たとえば、ポリエチレン樹脂および硬質塩化ビニル樹脂などの合成樹脂の押出成形によって一体成形される。そして、第１係合部２４および第３係合部２６を含む第１嵌合部２２、および変位吸収部３６は、基体２０の長手方向の全長に亘って形成される。この際、ライニング部材１２は、ポリエチレン樹脂およびポリプロピレン樹脂などのポリオレフィン系樹脂によって形成されることが好ましい。この実施例のライニング部材１２は、高密度ポリエチレン樹脂によって形成される。 Such a lining member 12 is integrally molded by extrusion molding of synthetic resin such as polyethylene resin and rigid polyvinyl chloride resin. The first fitting portion 22 including the first engaging portion 24 and the third engaging portion 26, and the displacement absorbing portion 36 are formed over the entire length of the base body 20 in the longitudinal direction. In this case, the lining member 12 is preferably formed from a polyolefin resin such as polyethylene resin and polypropylene resin. The lining member 12 in this embodiment is formed from high-density polyethylene resin.

ライニング部材１２をポリエチレン樹脂などのポリオレフィン系樹脂によって形成することで、ライニング部材１２の長手方向の端部どうしを融着接合することが可能となり、この接合部分は一体化し、強度および巻き回しの連続性を適切に確保できる。また、ポリオレフィン系樹脂は、柔軟性があるので、ポリオレフィン系樹脂によって形成したライニング部材１２は螺旋状に巻き回し易い。したがって、３００ｍｍ以上１０００ｍｍ以下の中口径を有する既設管１００に対応する大きさ（つまり比較的小さい口径）の螺旋管１０２を適切に形成できる。さらに、変位吸収部３６が変形し易くなり、施工時および地震時などにおいて螺旋管１０２が変位に追従し易くなる。さらにまた、ポリオレフィン系樹脂は、耐摩耗性および耐薬品性などに優れるので、螺旋管１０２の内面を構成するライニング部材１２をポリオレフィン系樹脂によって形成することで、螺旋管１０２の耐摩耗性および耐薬品性などの耐久性も向上する。 By forming the lining member 12 from a polyolefin resin such as polyethylene resin, it is possible to fuse the longitudinal ends of the lining member 12 together, and this joint is integrated, thereby appropriately ensuring strength and continuity of winding. In addition, since polyolefin resin is flexible, the lining member 12 formed from polyolefin resin is easy to wind in a spiral shape. Therefore, it is possible to appropriately form a spiral pipe 102 of a size (i.e., a relatively small diameter) corresponding to an existing pipe 100 having a medium diameter of 300 mm to 1000 mm. Furthermore, the displacement absorbing portion 36 becomes easily deformed, and the spiral pipe 102 easily follows the displacement during construction and earthquakes. Furthermore, since polyolefin resin has excellent abrasion resistance and chemical resistance, the durability of the spiral pipe 102, such as abrasion resistance and chemical resistance, is also improved by forming the lining member 12 constituting the inner surface of the spiral pipe 102 from a polyolefin resin.

図５および図６に示すように、連結部材１４は、ライニング部材１２の側縁部どうしを連結するための長尺の部材である。この連結部材１４は、上述のようにライニング部材１２の外面側（他方主面２０ｂ側）から取り付けられる部材であって、ライニング部材１２および連結部材１４を用いて螺旋管１０２を形成した状態において、螺旋管１０２の内面側に露出しないように構成されている。 As shown in Figures 5 and 6, the connecting member 14 is a long member for connecting the side edges of the lining member 12. As described above, this connecting member 14 is a member that is attached from the outer surface side (the other main surface 20b side) of the lining member 12, and is configured so as not to be exposed on the inner surface side of the spiral tube 102 when the spiral tube 102 is formed using the lining member 12 and the connecting member 14.

連結部材１４は、帯板状の基体（連結基体）５０を備える。基体５０の幅は、たとえば３０ｍｍであり、基体５０の厚みは、たとえば３ｍｍである。 The connecting member 14 has a strip-shaped base (connecting base) 50. The width of the base 50 is, for example, 30 mm, and the thickness of the base 50 is, for example, 3 mm.

基体５０の一方主面５０ａは、ライニング部材１２の基体２０の他方主面２０ｂに対向する面であり、この基体５０の一方主面５０ａの両側部のそれぞれには、ライニング部材１２の第１嵌合部２２と嵌め合わされる第２嵌合部５２が形成される。この第２嵌合部５２は、第２係合部５４と第４係合部５６とを含む。第４係合部５６は、基体５０の一方主面５０ａの両側縁部に形成される。第２係合部５４は、第４係合部５６よりも基体５０の幅方向における内側に、第４係合部５６と所定間隔をあけて形成される。 One main surface 50a of the base 50 is a surface facing the other main surface 20b of the base 20 of the lining member 12, and a second fitting portion 52 that fits into the first fitting portion 22 of the lining member 12 is formed on each side of the one main surface 50a of the base 50. The second fitting portion 52 includes a second engagement portion 54 and a fourth engagement portion 56. The fourth engagement portion 56 is formed on both side edges of the one main surface 50a of the base 50. The second engagement portion 54 is formed on the inside of the fourth engagement portion 56 in the width direction of the base 50, with a predetermined distance between them.

第２係合部５４は、基体５０の長手方向に延びる第２突条５８を有する。この第２突条５８の一方側面５８ａ（基体５０の幅方向における内側の面）の先端部には、ライニング部材１２の第１係止片３０を係止する第２係止片６０が形成される。一方、第４係合部５６は、基体５０の長手方向に延びる第４突条６２を有する。この第４突条６２の一方側面６２ａ（基体５０の幅方向における内側の面）の先端部には、ライニング部材１２の第３係止片３４を係止する第４係止片６４が形成される。 The second engagement portion 54 has a second ridge 58 extending in the longitudinal direction of the base 50. A second locking piece 60 that locks the first locking piece 30 of the lining member 12 is formed at the tip of one side surface 58a (the inner surface in the width direction of the base 50) of this second ridge 58. On the other hand, the fourth engagement portion 56 has a fourth ridge 62 extending in the longitudinal direction of the base 50. A fourth locking piece 64 that locks the third locking piece 34 of the lining member 12 is formed at the tip of one side surface 62a (the inner surface in the width direction of the base 50) of this fourth ridge 62.

また、基体５０の一方主面５０ａには、第２係合部５４と第４係合部５６との間に、弾性体であるエラストマ等によって帯状に形成される止水部６６が設けられる。この止水部６６は、ライニング部材１２の第１嵌合部２２と連結部材１４の第２嵌合部５２とを嵌め合わせた際に、基体５０の一方主面５０ａとライニング部材１２の第３係合部２６の先端部との間に挟み込まれることで、十分に圧縮される（図１０参照）。これにより、ライニング部材１２の側縁部どうしの連結部分における水密性が確保される。 In addition, a water stop portion 66 formed in a band shape from an elastic body such as an elastomer is provided on one main surface 50a of the base body 50 between the second engagement portion 54 and the fourth engagement portion 56. When the first engagement portion 22 of the lining member 12 and the second engagement portion 52 of the connecting member 14 are engaged with each other, the water stop portion 66 is sandwiched between the one main surface 50a of the base body 50 and the tip of the third engagement portion 26 of the lining member 12, and is sufficiently compressed (see FIG. 10). This ensures watertightness at the connection portion between the side edges of the lining member 12.

一方、基体５０の他方主面５０ｂは、既設管１００の内面と対向する面であり、この基体５０の他方主面５０ｂの両側部のそれぞれには、基体５０の長手方向に延びる断面半円状の突条６８が形成される。この突条６８は、後述するように螺旋管１０２を既設管１００内に送り込むときに、既設管１００の内面と接触する部分となる。 On the other hand, the other main surface 50b of the base 50 is the surface facing the inner surface of the existing pipe 100, and a semicircular cross-sectional protrusion 68 extending in the longitudinal direction of the base 50 is formed on each side of the other main surface 50b of the base 50. This protrusion 68 becomes the part that comes into contact with the inner surface of the existing pipe 100 when the helical pipe 102 is fed into the existing pipe 100 as described below.

また、連結部材１４の幅方向外側面のそれぞれ（この実施例では第４突条６２の他方側面６２ｂ）には、基体５０の長手方向に延びる断面矩形状の側面突条７０が形成される。この連結部材１４は、充填材１０４に対するアンカ部として機能する。 In addition, a side ridge 70 with a rectangular cross section that extends in the longitudinal direction of the base 50 is formed on each of the widthwise outer surfaces of the connecting member 14 (the other side surface 62b of the fourth ridge 62 in this embodiment). This connecting member 14 functions as an anchor portion for the filler 104.

このような連結部材１４は、たとえば、硬質塩化ビニル樹脂およびポリエチレン樹脂などの合成樹脂の押出成形によって一体成形される。そして、第２係合部５４および第４係合部５６を含む第２嵌合部５２、突条６８および側面突条７０は、基体５０の長手方向の全長に亘って形成される。この際、連結部材１４は、ポリオレフィン系樹脂よりも強度の大きい硬質塩化ビニル樹脂などの合成樹脂によって形成されることが好ましい。この実施例の連結部材１４は、硬質塩化ビニル樹脂によって形成される。なお、止水部６６は、連結部材１４と共押出により長手方向の全長に亘って設けられる。 The connecting member 14 is integrally molded by extrusion molding of synthetic resin such as rigid polyvinyl chloride resin and polyethylene resin. The second fitting portion 52 including the second engaging portion 54 and the fourth engaging portion 56, the ridge 68 and the side ridge 70 are formed over the entire length of the base 50 in the longitudinal direction. In this case, the connecting member 14 is preferably formed of synthetic resin such as rigid polyvinyl chloride resin, which has greater strength than polyolefin resin. The connecting member 14 in this embodiment is formed of rigid polyvinyl chloride resin. The water stop portion 66 is provided over the entire length of the base 50 by co-extrusion with the connecting member 14.

連結部材１４を強度の大きい硬質塩化ビニル樹脂によって形成することで、ライニング部材１２および連結部材１４の双方をポリオレフィン系樹脂で形成することと比較して、形成される螺旋管１０２全体の剛性を向上させることができる。また、後述のように螺旋管１０２を既設管１００内に送り込むときに、連結部材１４によってライニング部材１２を適切に保護できる。さらに、第２嵌合部５２の強度も大きくなるので、第１嵌合部２２と第２嵌合部５２との嵌合が外れ難くなり、ライニング部材１２の側縁部どうしを強固に連結できる。したがって、地震時などにおいてこの連結部分の変形が抑えられ、止水機能を確保できる。さらにまた、硬質塩化ビニル樹脂は、成形性がよいため連結部材１４の寸法を出し易い。また、硬質塩化ビニル樹脂は、ポリオレフィン系樹脂と比較して止水材の付着性が高い。 By forming the connecting member 14 from rigid polyvinyl chloride resin, which has high strength, the rigidity of the entire spiral pipe 102 can be improved compared to forming both the lining member 12 and the connecting member 14 from polyolefin resin. In addition, when the spiral pipe 102 is fed into the existing pipe 100 as described below, the connecting member 14 can adequately protect the lining member 12. Furthermore, since the strength of the second fitting portion 52 is also increased, the first fitting portion 22 and the second fitting portion 52 are less likely to come off, and the side edges of the lining member 12 can be firmly connected to each other. Therefore, deformation of this connecting portion during an earthquake or the like is suppressed, and the water-stopping function can be ensured. Furthermore, rigid polyvinyl chloride resin has good moldability, so it is easy to produce the dimensions of the connecting member 14. In addition, rigid polyvinyl chloride resin has a higher adhesion to water-stopping materials than polyolefin resin.

図７および図８に示すように、螺旋状に巻き回したライニング部材１２の隣り合う側縁部どうしを連結部材１４によって連結する際には、ライニング部材１２の基体２０の一方主面２０ａどうしが面一となるように、基体２０の側縁どうしを突き合わせた状態にする。そして、螺旋状に巻き回したライニング部材１２の外面側から連結部材１４を押し込むようにして、ライニング部材１２の第１嵌合部２２に対して連結部材１４の第２嵌合部５２を長手方向に順次嵌め合わせていく。すると、第２嵌合部５２の第２係止片６０および第４係止片６４のそれぞれによって第１嵌合部２２の第１係止片３０および第３係止片３４のそれぞれが係止されて、連結部材１４によってライニング部材１２の側縁部どうしが連結される。 7 and 8, when adjacent side edges of the spirally wound lining member 12 are connected by the connecting member 14, the side edges of the base 20 of the lining member 12 are butted together so that the main surfaces 20a of the base 20 are flush with each other. Then, the connecting member 14 is pushed in from the outer surface side of the spirally wound lining member 12, and the second fitting portion 52 of the connecting member 14 is fitted sequentially in the longitudinal direction into the first fitting portion 22 of the lining member 12. Then, the second locking piece 60 and the fourth locking piece 64 of the second fitting portion 52 lock the first locking piece 30 and the third locking piece 34 of the first fitting portion 22, respectively, and the side edges of the lining member 12 are connected by the connecting member 14.

この実施例では、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態、つまり螺旋管１０２を形成した状態においては、ライニング部材１２の基体２０の側縁どうしが直接突き合わされ、連結部材１４は、螺旋管１０２の内面側に露出しない。したがって、螺旋管１０２の内面に表れる継ぎ目の数を低減できるので、螺旋管１０２の内面を円滑にすることができ、螺旋管１０２の流下性能を向上できる。また、螺旋管１０２の内面に露出するのは、ポリエチレン樹脂（ポリオレフィン系樹脂）によって形成されるライニング部材１２のみであるので、螺旋管１０２の耐摩耗性および耐薬品性などの耐久性も向上する。 In this embodiment, when the side edges of the lining members 12 are connected by the connecting members 14, that is, when the helical pipe 102 is formed, the side edges of the bases 20 of the lining members 12 are directly butted against each other, and the connecting members 14 are not exposed on the inner surface of the helical pipe 102. Therefore, the number of seams that appear on the inner surface of the helical pipe 102 can be reduced, making the inner surface of the helical pipe 102 smooth and improving the flow performance of the helical pipe 102. In addition, since only the lining members 12 made of polyethylene resin (polyolefin resin) are exposed on the inner surface of the helical pipe 102, the durability of the helical pipe 102, such as its abrasion resistance and chemical resistance, is also improved.

また、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態において、その連結部分では、ライニング部材１２の第１係止片３０が基体２０の側縁を中心として互いに外向きとなり、連結部材１４の第２係止片６０が基体２０の側縁を中心として互いに内向きとなる。つまり、ライニング部材１２の側縁部どうしの連結部分では、連結部材１４の第２係合部５４によってライニング部材１２の第１係合部２４を挟み込む状態となる。このため、ライニング部材１２には、第１係合部２４と第２係合部５４との係合によって、隣り合う基体２０の側縁どうしが近づく方向（密着する方向）に力が作用する。したがって、形成された螺旋管１０２においては、ライニング部材１２の基体２０の側縁どうしを適切に密着させることができる。 In addition, when the side edges of the lining members 12 are connected to each other by the connecting member 14, the first locking pieces 30 of the lining members 12 face outward from each other around the side edge of the base 20, and the second locking pieces 60 of the connecting member 14 face inward from each other around the side edge of the base 20. In other words, in the connecting portion between the side edges of the lining members 12, the first locking portion 24 of the lining members 12 is sandwiched by the second locking portion 54 of the connecting member 14. Therefore, a force acts on the lining members 12 in a direction in which the side edges of the adjacent bases 20 approach each other (in a direction in which they come into close contact) due to the engagement between the first locking portion 24 and the second locking portion 54. Therefore, in the formed spiral tube 102, the side edges of the bases 20 of the lining members 12 can be appropriately brought into close contact with each other.

同様に、ライニング部材１２の側縁部どうしの連結部分では、基体２０の側縁を中心として、ライニング部材１２の第３係止片３４が互いに外向きとなり、連結部材１４の第４係止片６４が互いに内向きとなって、連結部材１４の第４係合部５６によってライニング部材１２の第３係合部２６を挟み込む状態となる。このため、ライニング部材１２には、第１係合部２４と第２係合部５４との係合に加えて、第３係合部２６と第４係合部５６との係合によっても、隣り合う基体２０の側縁どうしが近づく方向に力が作用する。したがって、形成された螺旋管１０２においては、ライニング部材１２の基体２０の側縁どうしをより適切に密着させることができる。 Similarly, at the connection portion between the side edges of the lining member 12, the third locking pieces 34 of the lining member 12 face outward from each other, and the fourth locking pieces 64 of the connecting member 14 face inward from each other, with the side edge of the base 20 as the center, so that the third engaging portion 26 of the lining member 12 is sandwiched by the fourth engaging portion 56 of the connecting member 14. Therefore, in addition to the engagement between the first engaging portion 24 and the second engaging portion 54, a force acts on the lining member 12 in the direction of bringing the side edges of the adjacent bases 20 closer to each other due to the engagement between the third engaging portion 26 and the fourth engaging portion 56. Therefore, in the formed spiral tube 102, the side edges of the bases 20 of the lining member 12 can be more appropriately brought into close contact with each other.

また、上述のように、第１係合部２４と第２係合部５４との係合、および第３係合部２６と第４係合部５６との係合を含む２重の係合によって、ライニング部材１２の側縁部どうしを連結するので、この連結部分においては引張方向（ライニング部材１２が互いに離れる方向）に対する抵抗力が大きくなる。このため、地震時などにおいて螺旋管１０２に軸方向変位が作用した場合でも、連結部分（第１嵌合部２２および第２嵌合部５２）の変形を抑えられ、止水部６６による止水機能を確保できる。また、２重の係合によって連結強度を確保するので、連結強度を大きくするために第１係合部２４、第２係合部５４、第３係合部２６および第４係合部５６の肉厚を大きくする必要がなく、他の部分と肉厚を均等にできる、すなわち部材全体を均一な肉厚にできるため成形し易い。 As described above, the side edges of the lining member 12 are connected to each other by double engagement including the engagement between the first engaging portion 24 and the second engaging portion 54 and the engagement between the third engaging portion 26 and the fourth engaging portion 56, so that the resistance to the pulling direction (the direction in which the lining members 12 move away from each other) is large in this connecting portion. Therefore, even if the helical tube 102 is subjected to axial displacement during an earthquake or the like, deformation of the connecting portion (the first engaging portion 22 and the second engaging portion 52) is suppressed, and the water-stopping function of the water-stopping portion 66 can be ensured. In addition, since the connecting strength is ensured by double engagement, there is no need to increase the thickness of the first engaging portion 24, the second engaging portion 54, the third engaging portion 26, and the fourth engaging portion 56 in order to increase the connecting strength, and the thickness can be made uniform with other portions, i.e., the entire member can be made uniform in thickness, making it easy to mold.

さらに、第１係合部２４の第１突条２８の他方側面２８ｂが傾斜面になっていることから、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態においては、第１突条２８の他方側面２８ｂ側に空隙８０が形成される。第１係合部２４と第２係合部５４とを係合させるときには、主として、ポリエチレン製の第１係合部２４が他方側面２８ｂ側に弾性変形して傾動するが、空隙８０があることによって第１係合部２４の倒れ代が確保されるので、第１係合部２４と第２係合部５４との係合に要する力（押込み力）を低減でき、ライニング部材１２に対して連結部材１４を取り付け易くなる。 Furthermore, since the other side surface 28b of the first protrusion 28 of the first engagement portion 24 is an inclined surface, when the side edges of the lining member 12 are connected to each other by the connecting member 14, a gap 80 is formed on the other side surface 28b side of the first protrusion 28. When the first engagement portion 24 and the second engagement portion 54 are engaged, the first engagement portion 24 made of polyethylene mainly elastically deforms and tilts toward the other side surface 28b side, but the presence of the gap 80 ensures that the first engagement portion 24 can fall, so the force (pushing force) required to engage the first engagement portion 24 and the second engagement portion 54 can be reduced, making it easier to attach the connecting member 14 to the lining member 12.

同様に、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態においては、第３突条３２の他方側面３２ｂ側に空隙８２が形成される。第３係合部２６と第４係合部５６とを係合させるときには、主として第３係合部２６が他方側面３２ｂ側に弾性変形して傾動するが、空隙８２があることによって第３係合部２６の倒れ代が確保されるので、第３係合部２６と第４係合部５６との係合に要する力を低減でき、ライニング部材１２に対して連結部材１４を取り付け易くなる。 Similarly, when the side edges of the lining member 12 are connected to each other by the connecting member 14, a gap 82 is formed on the other side surface 32b of the third protrusion 32. When the third engaging portion 26 and the fourth engaging portion 56 are engaged, the third engaging portion 26 mainly elastically deforms and tilts toward the other side surface 32b, but the presence of the gap 82 ensures that the third engaging portion 26 can fall, reducing the force required to engage the third engaging portion 26 and the fourth engaging portion 56, making it easier to attach the connecting member 14 to the lining member 12.

さらにまた、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態において、連結部材１４の基体５０に形成した突条６８の先端は、螺旋管１０２の径方向におけるライニング部材１２の最外部（この実施例では変位吸収部３６の連結部４０の外面）よりも外側に位置する。したがって、螺旋管１０２を既設管１００内に送り込むときには、突条６８が既設管１００の内面と摺接し、ライニング部材１２は既設管１００の内面と摺接しない（または摺接し難い）ので、連結部材１４によってライニング部材１２を適切に保護できる。また、連結部材１４の基体５０の他方主面５０ｂに突条６８を形成することで、螺旋管１０２を既設管１００内に送り込むときには、既設管１００の内面と螺旋管１０２の外面との接触面積が減少する。これにより、螺旋管１０２の挿入抵抗を低減できると共に、既設管１００との摺接による螺旋管１０２の損傷を低減できる。なお、この実施例では、連結部材１４を強度の大きい硬質塩化ビニル樹脂によって形成しているので、ライニング部材１２の保護効果および螺旋管１０２の損傷低減効果がより適切に発揮される。 Furthermore, in a state in which the side edges of the lining member 12 are connected to each other by the connecting member 14, the tip of the protrusion 68 formed on the base 50 of the connecting member 14 is located outside the outermost part of the lining member 12 in the radial direction of the spiral pipe 102 (in this embodiment, the outer surface of the connecting part 40 of the displacement absorbing part 36). Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the protrusion 68 slides against the inner surface of the existing pipe 100, and the lining member 12 does not slide against the inner surface of the existing pipe 100 (or does not easily slide against the inner surface of the existing pipe 100), so that the lining member 12 can be appropriately protected by the connecting member 14. In addition, by forming the protrusion 68 on the other main surface 50b of the base 50 of the connecting member 14, the contact area between the inner surface of the existing pipe 100 and the outer surface of the spiral pipe 102 is reduced when the spiral pipe 102 is fed into the existing pipe 100. This reduces the insertion resistance of the helical pipe 102 and reduces damage to the helical pipe 102 caused by sliding contact with the existing pipe 100. In this embodiment, the connecting member 14 is made of a hard polyvinyl chloride resin with high strength, so the protective effect of the lining member 12 and the effect of reducing damage to the helical pipe 102 are more appropriately exerted.

また、この実施例では、連結部材１４の基体５０の他方主面５０ｂも、連結部材１４によってライニング部材１２の側縁部どうしを連結した状態において、螺旋管１０２の径方向におけるライニング部材１２の最外部よりも外側に位置する。したがって、螺旋管１０２を既設管１００内に送り込むときには、連結部材１４によってライニング部材１２をより確実に保護できる。 In addition, in this embodiment, the other main surface 50b of the base 50 of the connecting member 14 is also located outside the outermost part of the lining member 12 in the radial direction of the spiral pipe 102 when the side edges of the lining member 12 are connected to each other by the connecting member 14. Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the lining member 12 can be more reliably protected by the connecting member 14.

続いて、図１、図９および図１０を参照して、この発明の一実施例である管路更生工法について具体的に説明する。この実施例では、発進側マンホール１１０から到達側マンホール１１２までの間の既設管１００を更生するものとする。 Next, a pipe rehabilitation method according to one embodiment of the present invention will be specifically described with reference to Figures 1, 9, and 10. In this embodiment, the existing pipe 100 between the starting manhole 110 and the arrival manhole 112 is to be rehabilitated.

既設管１００を更生するときには、先ず、発進側マンホール１１０内に製管機１１４を設置すると共に、発進側マンホール１１０の近傍の地上にライニング部材１２および連結部材１４を含む管更生部材１０を設置する。ライニング部材１２および連結部材１４は、それぞれ個別にロール状に巻き取ったものを用意して設置するとよい。なお、既設管１００内は、高圧洗浄機などを用いて予め洗浄しておく。 When rehabilitating an existing pipe 100, first, a pipe making machine 114 is installed inside the starting manhole 110, and a pipe rehabilitation member 10 including a lining member 12 and a connecting member 14 is installed on the ground near the starting manhole 110. The lining member 12 and the connecting member 14 should be prepared and installed individually wound into rolls. The inside of the existing pipe 100 is cleaned in advance using a high-pressure washer or the like.

次に、図１に示すように、既設管１００内に螺旋管１０２を施工する。すなわち、ライニング部材１２および連結部材１４を地上から発進側マンホール１１０内に設置した製管機１１４に供給し、この製管機１１４を用いて形成した螺旋管１０２を発進側マンホール１１０内から既設管１００内に順次送り込んでいく。ライニング部材１２を製管機１１４に供給する際には、必要に応じて押込機（図示せず）を用いるとよい。製管機１１４においては、ライニング部材１２の基体２０の側縁どうしを突き合わせるようにしてライニング部材１２を螺旋状に巻き回すと共に、ライニング部材１２の外面側から連結部材１４を取り付けてライニング部材１２の隣り合う側縁部どうしを連結することで、螺旋管１０２が製管される。 Next, as shown in FIG. 1, a spiral pipe 102 is installed in the existing pipe 100. That is, the lining member 12 and the connecting member 14 are supplied from the ground to a pipe making machine 114 installed in the starting manhole 110, and the spiral pipe 102 formed by using this pipe making machine 114 is sequentially fed from the starting manhole 110 into the existing pipe 100. When supplying the lining member 12 to the pipe making machine 114, a pushing machine (not shown) may be used as necessary. In the pipe making machine 114, the lining member 12 is wound spirally so that the side edges of the base 20 of the lining member 12 are butted against each other, and the connecting member 14 is attached from the outer surface side of the lining member 12 to connect the adjacent side edges of the lining member 12, thereby making the spiral pipe 102.

具体的に説明すると、螺旋管１０２の製管開始時には、先ず、製管機１１４内にライニング部材１２の先頭部分をセットする。この際には、製管機１１４内にライニング部材１２を送り込み、少なくともライニング部材１２の隣り合う側縁部どうしが連結可能となる位置（つまり少なくとも連結可能な重なり代ができる）まで、ライニング部材１２を螺旋状に巻き回す。この際、ライニング部材１２を螺旋状に５／４周分以上巻き回すことが好ましい。この実施例では、図９(Ａ)に示すように、ライニング部材１２を螺旋状に２周分巻き回している。そしてこの状態で、ライニング部材１２の巻き回しを一旦停止し、ライニング部材１２の位置決めを行う。つまり、ライニング部材１２の周長（口径）および軸方向位置を調整する。これにより、ライニング部材１２の先頭部分が正確に位置決めされた状態で螺旋管１０２の製管を開始することができる。 To be more specific, when the production of the helical pipe 102 starts, the leading portion of the lining member 12 is first set in the pipe production machine 114. At this time, the lining member 12 is fed into the pipe production machine 114, and the lining member 12 is wound in a spiral shape at least until the adjacent side edges of the lining member 12 can be connected to each other (i.e., there is at least an overlapping portion that can be connected). At this time, it is preferable to wind the lining member 12 in a spiral shape 5/4 times or more. In this embodiment, as shown in FIG. 9(A), the lining member 12 is wound in a spiral shape for two revolutions. Then, in this state, the winding of the lining member 12 is stopped once, and the lining member 12 is positioned. In other words, the circumferential length (diameter) and axial position of the lining member 12 are adjusted. This allows the production of the helical pipe 102 to start with the leading portion of the lining member 12 accurately positioned.

その後、図９(Ｂ)に示すように、製管機１１４内への連結部材１４の供給を開始すると共にライニング部材１２の巻き回しを再開し、連結部材１４によるライニング部材１２の隣り合う側縁部どうしの連結を開始する。そして、ライニング部材１２および連結部材１４を製管機１１４に供給していくことで、図９(Ｃ)に示すように、螺旋管１０２を順次製管していく。製管機１１４において製管された螺旋管１０２は、製管された部分から順に製管機１１４から押し出されて、回転しながら到達側マンホール１１２に向かって既設管１００内に送り込まれる。 After that, as shown in FIG. 9(B), the supply of the connecting member 14 into the pipe making machine 114 is started and the winding of the lining member 12 is resumed, and the connecting member 14 starts connecting adjacent side edges of the lining member 12 to each other. Then, by supplying the lining member 12 and the connecting member 14 to the pipe making machine 114, the helical pipe 102 is successively produced as shown in FIG. 9(C). The helical pipe 102 produced in the pipe making machine 114 is pushed out of the pipe making machine 114 in order from the produced portion, and is fed into the existing pipe 100 toward the destination manhole 112 while rotating.

既設管１００の更生区間の全長に亘って螺旋管１０２を施工すると、続いて、既設管１００の内面と螺旋管１０２の外面との間に充填材１０４を注入する。充填材１０４が固化することで、図１０に示すような、既設管１００と螺旋管１０２とが一体化した更生管（複合管）１０６が形成される。その後、片付け作業などを適宜実施することによって、既設管１００の更生作業が終了する。 After the spiral pipe 102 has been installed over the entire length of the rehabilitated section of the existing pipe 100, filler material 104 is then injected between the inner surface of the existing pipe 100 and the outer surface of the spiral pipe 102. As the filler material 104 hardens, a rehabilitated pipe (composite pipe) 106 is formed in which the existing pipe 100 and the spiral pipe 102 are integrated, as shown in FIG. 10. Cleanup work and other procedures are then carried out as appropriate to complete the rehabilitation work on the existing pipe 100.

このような管路更生方法では、螺旋状に巻き回したライニング部材１２の外面側から連結部材１４を取り付けるので、ライニング部材の内面側から連結部材を取り付ける管更生部材では製管作業が困難となる３００ｍｍ以上１０００ｍｍ以下の中口径の既設管１００に対応する大きさ（つまり比較的小さい口径）の螺旋管１０２であっても、製管し易い。 In this type of pipeline rehabilitation method, the connecting member 14 is attached from the outer surface side of the spirally wound lining member 12, so it is easy to manufacture a spiral pipe 102 of a size (i.e., a relatively small diameter) that corresponds to an existing pipe 100 of a medium diameter of 300 mm to 1000 mm or less, which would be difficult to manufacture using a pipe rehabilitation member that attaches a connecting member from the inner surface side of the lining member.

また、ライニング部材１２および連結部材１４の２つの部材を用いて螺旋管１０２を形成するので、ライニング部材１２を周回させて位置決めした後、連結部材１４によってライニング部材１２の側縁部どうしを連結固定することができる。したがって、螺旋管１０２を形成する際に、隣り合うライニング部材１２の周長（口径）を合わせ易く、軸方向の全長に亘って口径が一様な螺旋管１０２を形成できる。 In addition, since the helical pipe 102 is formed using two members, the lining member 12 and the connecting member 14, the lining member 12 can be rotated and positioned, and then the side edges of the lining member 12 can be connected and fixed together by the connecting member 14. Therefore, when forming the helical pipe 102, it is easy to match the circumferential lengths (diameters) of adjacent lining members 12, and a helical pipe 102 with a uniform diameter over its entire axial length can be formed.

さらに、製管開始時において、ライニング部材１２の巻き回しを一旦停止した状態でライニング部材１２の位置決めを行うので、ライニング部材１２の先頭部分をより正確に位置決めできる。したがって、軸方向の全長に亘って口径が一様な螺旋管１０２をより適切に形成できる。ただし、製管開始時におけるライニング部材１２の位置決めは、ライニング部材１２の巻き回しを停止することなく行うこともできる。 Furthermore, since the lining member 12 is positioned with the winding of the lining member 12 temporarily stopped at the start of pipe production, the leading end of the lining member 12 can be positioned more accurately. Therefore, a helical pipe 102 with a uniform diameter over its entire axial length can be more appropriately formed. However, the positioning of the lining member 12 at the start of pipe production can also be performed without stopping the winding of the lining member 12.

さらにまた、ライニング部材１２を螺旋状に巻き回して製管する際には、ライニング部材１２の基体２０の側縁どうしを突き合わせた状態にするので、螺旋管１０２の軸方向におけるライニング部材１２の位置決めが容易となり、製管し易い。 Furthermore, when the lining member 12 is wound in a spiral shape to produce a pipe, the side edges of the base 20 of the lining member 12 are butted together, making it easy to position the lining member 12 in the axial direction of the spiral pipe 102 and facilitating pipe production.

以上のように、この実施例によれば、ライニング部材１２に対して連結部材１４をライニング部材１２の外面側から取り付けるので、比較的小さい口径の螺旋管１０２であっても製管し易く、内部に作業者が入って作業をすることが難しい中口径の既設管１００を適切に更生できる。また、ライニング部材１２および連結部材１４の２つの部材を用いて螺旋管１０２を形成するので、隣り合うライニング部材１２の周長を合わせ易く、軸方向の全長に亘って口径が一様な螺旋管１０２を形成できる。 As described above, according to this embodiment, since the connecting member 14 is attached to the lining member 12 from the outer surface side of the lining member 12, it is easy to manufacture a spiral pipe 102 with a relatively small diameter, and it is possible to appropriately rehabilitate an existing medium-diameter pipe 100 in which it is difficult for workers to enter the interior. In addition, since the spiral pipe 102 is formed using two members, the lining member 12 and the connecting member 14, it is easy to match the circumferential lengths of adjacent lining members 12, and it is possible to form a spiral pipe 102 with a uniform diameter over the entire axial length.

なお、上述した管更生部材１０（ライニング部材１２および連結部材１４）の具体的な構成ないし形状は、ライニング部材１２の外面側から連結部材１４を取り付け可能な態様であればよく、適宜変更可能である。 The specific configuration or shape of the above-mentioned pipe rehabilitation member 10 (lining member 12 and connecting member 14) may be modified as appropriate as long as it allows the connecting member 14 to be attached from the outer surface side of the lining member 12.

たとえば、上述の実施例では、ライニング部材１２は、連結部材１４との嵌合部（第１嵌合部２２）として、２つの係合部（第１係合部２４および第３係合部２６）を有するが、係合部は１つであっても構わない。同様に、連結部材１４は、ライニング部材１２との嵌合部（第２嵌合部５２）として、２つの係合部（第２係合部５４および第４係合部５６）を有するが、係合部は１つであっても構わない。また、ライニング部材１２および連結部材１４に形成する嵌合部のうち、一方の嵌合部を溝状に形成し、他方の嵌合部をそれに嵌め込まれる突条状に形成することもできる。 For example, in the above embodiment, the lining member 12 has two engagement portions (first engagement portion 24 and third engagement portion 26) as an engagement portion (first engagement portion 22) with the connecting member 14, but there may be only one engagement portion. Similarly, the connecting member 14 has two engagement portions (second engagement portion 54 and fourth engagement portion 56) as an engagement portion (second engagement portion 52) with the lining member 12, but there may be only one engagement portion. In addition, one of the engagement portions formed on the lining member 12 and the connecting member 14 can be formed in a groove shape and the other engagement portion can be formed in a ridge shape that fits into the groove.

また、上述の実施例では、連結部材１４は、基体５０の両側部に形成される２つの突条６８を有するが、突条６８は、１つまたは３つ以上でも構わない。たとえば、１つの突条６８を設けるのであれば、基体５０の他方主面５０ｂの幅方向中央部に設ければよく、３つの突条６８を設けるのであれば、基体５０の他方主面５０ｂの幅方向中央部および両側部に設ければよい。 In the above embodiment, the connecting member 14 has two ridges 68 formed on both sides of the base 50, but the number of ridges 68 may be one or three or more. For example, if one ridge 68 is provided, it may be provided in the center of the width direction of the other main surface 50b of the base 50, and if three ridges 68 are provided, they may be provided in the center of the width direction and on both sides of the other main surface 50b of the base 50.

さらに、上述の実施例では、ライニング部材１２の変位吸収部３６の基端部間に隙間４２を形成するようにしたが、この隙間４２は、必ずしも形成される必要はない。また、隙間４２を覆うように基体２０の一方主面２０ａどうしを連結する薄膜部を一体成形するようにしてもよいし、後付けで薄膜部を貼り付ける等して設けるようにしてもよい。 In addition, in the above embodiment, a gap 42 is formed between the base ends of the displacement absorbing portions 36 of the lining member 12, but this gap 42 does not necessarily have to be formed. In addition, a thin film portion that connects one main surface 20a of the base body 20 to cover the gap 42 may be integrally molded, or the thin film portion may be attached later.

さらにまた、上述の実施例では設けていないが、ライニング部材１２の外面側（他方主面２０ｂ側）には、剛性を高めるための補強部材を取り付けておくこともできる。 Furthermore, although not provided in the above embodiment, a reinforcing member can be attached to the outer surface side (other main surface 20b side) of the lining member 12 to increase rigidity.

また、上述の実施例では、螺旋管１０２を回転させながら既設管１００内に送り込む元押し式の管路更生工法を例示したが、これに限定されない。この発明に係る管路更生工法は、発進側マンホール１１０内で製管した螺旋管１０２を到達側マンホール１１２側からウィンチ等で引っ張ることで、螺旋管１０２を回転させることなく既設管１００内に送り込む牽引式の管路更生工法であってもよい。 In addition, in the above embodiment, a push-type pipeline rehabilitation method in which the spiral pipe 102 is rotated while being fed into the existing pipe 100 is exemplified, but the invention is not limited to this. The pipeline rehabilitation method according to the present invention may also be a towing-type pipeline rehabilitation method in which the spiral pipe 102 manufactured in the starting manhole 110 is pulled from the arrival manhole 112 side by a winch or the like to feed the spiral pipe 102 into the existing pipe 100 without rotating it.

さらに、上述の実施例では、充填材１０４によって既設管１００と螺旋管１０２とが一体化した複合管（更生管１０６）を形成するようにしたが、これに限定されない。この発明に係る管路更生工法は、既設管１００から独立して強度を保持する自立管を形成することもできる。 In addition, in the above-mentioned embodiment, the existing pipe 100 and the spiral pipe 102 are integrated with the filler 104 to form a composite pipe (rehabilitated pipe 106), but this is not limited to this. The pipeline rehabilitation method according to the present invention can also form a free-standing pipe that maintains its strength independently of the existing pipe 100.

なお、上で挙げた寸法などの具体的数値はいずれも単なる一例であり、製品の仕様などの必要に応じて適宜変更可能である。 Note that the specific values such as dimensions listed above are merely examples and can be changed as necessary depending on the product specifications, etc.

１０ …管更生部材
１２ …ライニング部材
１４ …連結部材
２０ …ライニング部材の基体
２２ …第１嵌合部
５０ …連結部材の基体
５２ …第２嵌合部
１００ …既設管
１０２ …螺旋管
１０４ …充填材
１０６ …更生管 REFERENCE SIGNS LIST 10 Pipe rehabilitation member 12 Lining member 14 Connecting member 20 Base body of lining member 22 First fitting portion 50 Base body of connecting member 52 Second fitting portion 100 Existing pipe 102 Spiral pipe 104 Filling material 106 Rehabilitating pipe

Claims

ライニング部材を螺旋状に巻き回して製管した螺旋管を用いて既設管を更生する管路更生工法であって、
マンホール内で前記ライニング部材を螺旋状に巻き回すと共に、螺旋状に巻き回した前記ライニング部材の外面側から連結部材を取り付けて当該ライニング部材の隣り合う側縁部どうしを連結して前記螺旋管を形成しながら、形成した前記螺旋管を前記マンホール内から前記既設管内に順次送り込んでいく工程を含み、
前記ライニング部材は、螺旋状に巻き回したときの外面側の両側部のそれぞれに形成される第１係合部を備え、
前記連結部材は、前記第１係合部のそれぞれと係合される第２係合部を備え、
前記第１係合部は、前記ライニング部材の長手方向に延びる第１突条と、前記第１突条の一方側面の先端部に形成される第１係止片とを有し、
前記第２係合部は、前記連結部材の長手方向に延びる第２突条と、前記第２突条の一方側面に形成され、前記第１係止片と係合される第２係止片とを有する、管路更生工法。 A pipeline rehabilitation method for rehabilitating an existing pipe using a helical pipe produced by winding a lining member in a spiral shape, comprising:
The method includes a step of spirally winding the lining member in the manhole, attaching a connecting member to the outer surface of the spirally wound lining member to connect adjacent side edge portions of the lining member to form the helical pipe, and sequentially feeding the formed helical pipe from the manhole into the existing pipe,
The lining member includes a first engagement portion formed on each of both sides on an outer surface side when the lining member is wound in a spiral shape,
the connecting member includes second engagement portions that are engaged with the first engagement portions,
the first engagement portion has a first protrusion extending in a longitudinal direction of the lining member and a first locking piece formed at a tip end of one side surface of the first protrusion,
A pipeline rehabilitation method, wherein the second engagement portion has a second protrusion extending in the longitudinal direction of the connecting member, and a second locking piece formed on one side of the second protrusion and engaging with the first locking piece.

前記連結部材によって前記ライニング部材の隣り合う側縁部どうしを連結して前記螺旋管を形成した状態において、前記連結部材の最外部は、前記螺旋管の径方向における前記ライニング部材の最外部よりも外側に位置する、請求項１記載の管路更生工法。 A pipeline rehabilitation method as described in claim 1, wherein when adjacent side edge portions of the lining member are connected to each other by the connecting member to form the spiral pipe, the outermost portion of the connecting member is positioned outer than the outermost portion of the lining member in the radial direction of the spiral pipe.

前記ライニング部材を螺旋状に巻き回すときには、前記ライニング部材の側縁どうしを突き合わせる、請求項１または２記載の管路更生工法。 3. The pipeline rehabilitation method according to claim 1 , wherein side edges of the lining member are butted against each other when the lining member is wound in a spiral shape.