JP2018083386A - Regeneration pipeline structure and belt-like member for lining - Google Patents

Regeneration pipeline structure and belt-like member for lining Download PDF

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JP2018083386A
JP2018083386A JP2016229034A JP2016229034A JP2018083386A JP 2018083386 A JP2018083386 A JP 2018083386A JP 2016229034 A JP2016229034 A JP 2016229034A JP 2016229034 A JP2016229034 A JP 2016229034A JP 2018083386 A JP2018083386 A JP 2018083386A
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belt
spacer
shaped
pipe
extension
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JP6755784B2 (en
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達郎 馬場
Tatsuro Baba
達郎 馬場
菅原 宏
Hiroshi Sugawara
宏 菅原
佳郎 杉山
Yoshiro Sugiyama
佳郎 杉山
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積水化学工業株式会社
Sekisui Chem Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To more increase earthquake resistance in a regeneration pipeline and to achieve the maintenance of the functions of the regeneration pipeline after earthquake.SOLUTION: Provided is a belt-like member 1 for lining comprising: a rib 22 projecting to the side of an existing pipe 6; and a stretched part 24 so as to project to the side of the existing pipe 6. Further, the belt-like member 1 comprises a spacer member 3 straddling the stretched part 24 and projecting to the side of the existing pipe 6 than the stretched part 24 and the rib 22. Also provided is a regeneration pipeline structure where a crack induction part 5 is provided between the inner wall of the existing pipe 6 and the spacer member 3, and, in the crack induction part 5, a backfill material 4 is filled at a thickness lower than that of a gap between the inner wall of the existing pipe 6 and the rib 22.SELECTED DRAWING: Figure 5

Description

本発明は、更生管路構造およびこれに用いられるライニング用帯状部材に関する。   The present invention relates to a rehabilitation pipe line structure and a lining strip member used for the same.
螺旋状に巻回した長尺の帯状部材の側縁部同士を接合して管状体を形成し、この管状体によって、老朽化した既設管路を更生することが広く行われている。   It has been widely practiced to form a tubular body by joining the side edges of a long belt-shaped member wound in a spiral shape, and rehabilitating an existing pipe line that has been aged with this tubular body.
従来、このような帯状部材として、幅方向の両側部に嵌合部を備えたものが知られている。図9に例示するように、帯状部材90は互いに嵌め合わされる形状の嵌合部91を備えており、複数条のリブ92間には補強部材93が装着されている。既設管95は、複数の管体が互いに接合されて構成され、既設管95と更生管96とは、それらの間隙に充填された裏込め材97によって一体化されている。   Conventionally, as such a band-shaped member, one having fitting portions on both side portions in the width direction is known. As illustrated in FIG. 9, the band-shaped member 90 includes a fitting portion 91 having a shape to be fitted to each other, and a reinforcing member 93 is mounted between the plurality of ribs 92. The existing pipe 95 is configured by joining a plurality of pipe bodies to each other, and the existing pipe 95 and the rehabilitation pipe 96 are integrated by a backfill material 97 filled in a gap therebetween.
この種の更生管路においては、地震動に対する耐震性を、帯状部材90の嵌合部91を伸縮変形させることによって担保していた。すなわち、帯状部材90の嵌合部91において伸縮変形や屈曲変形をさせることによって、更生管96の変形を許容し、更生管路の内部の破損を防いでいた。   In this type of rehabilitating pipeline, the earthquake resistance against earthquake motion is ensured by expanding and contracting the fitting portion 91 of the belt-like member 90. That is, by causing the fitting portion 91 of the belt-like member 90 to expand and contract or bend, deformation of the rehabilitation pipe 96 is allowed and damage inside the rehabilitation pipe line is prevented.
また、例えば特許文献1に開示される、伸縮可能な丸波形状の伸縮部を備えた帯状部材も提案されており、帯状部材に外力が作用したとき、伸縮部を伸張させて破損を防ぐことが可能とされていた。   In addition, for example, a belt-shaped member provided with a stretchable round-wave-shaped stretchable part disclosed in Patent Document 1 has been proposed, and when an external force is applied to the belt-shaped member, the stretchable part is stretched to prevent damage. It was supposed to be possible.
特開平11−34165号公報JP-A-11-34165
既設管が、例えば下水道等の生活基盤に密着した設備であると、地震動によっても管渠断面が確保され、更生管の内面に損傷がなく、設計流量を流下させられる状態で維持されることが望まれる。また、大地震によって既設管の管渠断面が変形したとしても、少なくともその内側の更生管には破断や亀裂等を生じないようにして土砂等の浸入を防ぎ、復旧までの間、下水を流下させられる状態であることが望まれる。   If the existing pipe is a facility that is in close contact with the living infrastructure such as the sewer, for example, the cross section of the pipe can be secured even by seismic motion, the inner surface of the rehabilitated pipe is not damaged, and the design flow rate can be maintained. desired. Even if the cross section of the existing pipe is deformed by a large earthquake, at least the rehabilitation pipe inside it will not break or crack to prevent intrusion of earth and sand, etc. It is desirable to be in a state where
既設管は、地震動によって、管体同士の接合部に水平方向の抜出しや屈曲等の変位を生じる可能性がある。一方、更生管にあっては、その外側の既設管の影響を受けて、引張力や圧縮力等の外力が作用する可能性がある。   The existing pipe may cause displacement such as horizontal extraction or bending at the joint between the pipes due to the earthquake motion. On the other hand, in the rehabilitation pipe, there is a possibility that an external force such as a tensile force or a compression force acts due to the influence of the existing pipe outside the rehabilitation pipe.
例えば、図9に示すように、地震動によって、既設管95の接合部98に水平方向(矢印方向)の引張力が作用した場合、接合部98に水平方向変位(抜出し変形)が発生し、接合部98近傍の裏込め材97に亀裂が生じる。裏込め材97に生じた亀裂は内側の更生管96に達し、水平方向の引張力が更生管96にも作用する。耐震指針によれば、この引張力が作用する範囲は、螺旋状に巻回された帯状部材90の10周分の巻回し範囲に拡散すると想定されている。これに基づいて、帯状部材90は、想定される変位量を許容し、更生管96の機能を確保しうるように設計されていた。   For example, as shown in FIG. 9, when a tensile force in the horizontal direction (arrow direction) acts on the joint portion 98 of the existing pipe 95 due to earthquake motion, horizontal displacement (extraction deformation) occurs in the joint portion 98, Cracks occur in the backfill material 97 near the portion 98. The crack generated in the backfill material 97 reaches the inner rehabilitation pipe 96, and a horizontal tensile force acts on the rehabilitation pipe 96. According to the earthquake resistance guideline, it is assumed that the range in which the tensile force acts is diffused to the winding range of 10 turns of the belt-shaped member 90 wound spirally. Based on this, the belt-like member 90 was designed so as to allow an assumed amount of displacement and ensure the function of the rehabilitation pipe 96.
しかしながら、地震動によって生じる水平方向の抜出しや屈曲等の影響は、その内側の裏込め材や帯状部材に対して局所的に集中することも考えられた。更生管は、既設管との間に裏込め材が介在するので、必ずしも既設管と同じ挙動をするとは限らず、既設管の管体1本ごとの地震時の挙動を把握することは不可能とされた。また、将来想定されるような大地震を考慮に含めれば、帯状部材における変位量が上述の許容範囲を超える可能性も否定できなかった。   However, it was considered that the effects of horizontal pull-out and bending caused by the earthquake motion were concentrated locally on the back-filling material and the belt-like member inside. Rehabilitation pipes do not always behave the same as existing pipes because backfilling materials are interposed between existing pipes, and it is impossible to grasp the behavior of existing pipes during an earthquake. It was said. Moreover, if a large earthquake as expected in the future is taken into consideration, the possibility that the amount of displacement in the belt-shaped member exceeds the above-described allowable range could not be denied.
本発明は、上記のような問題点にかんがみてなされたものであり、その目的とするところは、更生管路における耐震性をより一層高め、地震動によって発生する既設管等の流体の流路の抜出しや屈曲などの変位を、その内側の更生管路に対して局所的に作用させず、分散させられるようにして、地震後にも更生管路の機能維持を可能にする更生管路構造およびライニング用帯状部材を提供することにある。   The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to further improve the earthquake resistance in the rehabilitation pipe and to improve the flow path of existing pipes and the like generated by the earthquake motion. Rehabilitation pipeline structure and lining that allows the rehabilitation pipeline function to be maintained even after an earthquake so that displacement such as withdrawal and bending is not locally applied to the rehabilitation pipeline inside it, but distributed. The object is to provide a belt-like member.
前記の目的を達成するための本発明の解決手段は、流路の内壁が帯状部材でライニングされ、前記内壁と前記帯状部材との間に裏込め材が設けられている更生管路構造を前提とする。かかる更生管路構造として、前記帯状部材は、前記流路の内壁側に突出するリブと、凸条状の伸張部と、前記伸張部を跨ぎ前記伸張部および前記リブよりも内壁側に突出したスペーサ部材とを備えており、前記流路の内壁と前記スペーサ部材との間隔は、前記流路の内壁と前記リブとの間隔よりも小さい構成とされている。   The solving means of the present invention for achieving the above object is based on a rehabilitation pipe line structure in which an inner wall of a flow path is lined with a belt-like member and a backfill material is provided between the inner wall and the belt-like member. And As such a rehabilitation pipe structure, the belt-like member protrudes toward the inner wall side of the extension portion and the rib across the extension portion, a rib protruding to the inner wall side of the flow path, a ridge-like extension portion, and the extension portion. A spacer member is provided, and an interval between the inner wall of the channel and the spacer member is smaller than an interval between the inner wall of the channel and the rib.
この特定事項により、前記流路の内壁と帯状部材との間では、スペーサ部材が内壁側に突出した状態で配設され、裏込め材の厚みを減少させて設けられる。ライニングされた更生管路に地震動等によってひび割れが生じる場合、当該スペーサ部材の近傍においてひび割れが誘発され、スペーサ部材のない箇所に比べてひび割れを発生させやすくすることができる。これにより、更生管路と流路との間で、かかるひび割れを予め設定した部位に分散させることが可能となる。また、帯状部材は、伸張部とスペーサ部材とを備えているので、生じたひび割れを許容するように変形することが可能であり、大きな破損が発生する可能性を低減させることができる。   Due to this specific matter, the spacer member is disposed between the inner wall of the flow path and the belt-like member in a state of protruding toward the inner wall side, and the thickness of the backfilling material is reduced. When cracks are generated in the lined rehabilitation pipeline due to seismic motion or the like, cracks are induced in the vicinity of the spacer member, and it is possible to easily generate cracks as compared with a portion without the spacer member. Thereby, it becomes possible to disperse such cracks between the rehabilitation pipe line and the flow path in a predetermined portion. In addition, since the belt-shaped member includes the extending portion and the spacer member, the belt-shaped member can be deformed so as to allow the generated cracks, and the possibility of a large breakage can be reduced.
また、前記更生管路構造に用いられるライニング用帯状部材も本発明の技術的思想の範疇である。すなわち、流路の内面に設けられるライニング用帯状部材を前提としており、このライニング用帯状部材として、凸条状の伸張部が設けられた帯状の本体と、前記伸張部を跨ぎ前記伸張部より突出するスペーサ部材とを備えた構成としている。   Further, the lining strip member used in the rehabilitation pipe structure is also within the scope of the technical idea of the present invention. That is, it is premised on a lining strip-shaped member provided on the inner surface of the flow path, and as this lining strip-shaped member, a strip-shaped main body provided with a ridge-shaped stretched portion, and straddles the stretched portion and protrudes from the stretched portion. And a spacer member to be configured.
この特定事項により、当該ライニング用帯状部材により前記流路がライニングされたとき、前記流路の内壁と前記スペーサ部材との間隔を狭めることができ、前記流路の内壁と帯状部材との間でスペーサ部材を内壁側に突出させた状態で配設することが可能とされる。これにより、流路と更生管路との間に設けられる裏込め材の厚みを制御することができる。   According to this specific matter, when the flow path is lined by the lining strip member, the interval between the inner wall of the flow path and the spacer member can be reduced, and between the inner wall of the flow path and the strip member. The spacer member can be disposed in a state of protruding toward the inner wall side. Thereby, the thickness of the backfilling material provided between the flow path and the rehabilitation pipe line can be controlled.
前記ライニング用帯状部材の具体的な構成として次のものが挙げられる。すなわち、前記スペーサ部材は、前記伸張部を挟むとともに、該伸張部を収縮させた状態で取り付けられた構成であることが好ましい。   Specific examples of the lining strip member include the following. That is, it is preferable that the spacer member has a configuration in which the extension portion is sandwiched and attached with the extension portion contracted.
これにより、前記伸張部は通常状態では収縮した状態に保持され、ライニング用帯状部材により前記流路がライニングされたとき、前記伸張部による溝がライニング後の流路内面に現れにくいものとなり、流体の流通性を良好に確保することが可能となる。また、収縮した状態の前記伸張部が外力の作用で伸張するのに対応して前記スペーサ部材も変形しうる。したがって、前記伸張部は、外力が作用したときには、その収縮が解除されるとともに伸張変形することが可能となる。   As a result, the extension portion is held in a contracted state in a normal state, and when the flow path is lined by a lining strip member, a groove formed by the extension portion hardly appears on the inner surface of the flow path after lining. It is possible to ensure good distribution of the. In addition, the spacer member can be deformed in response to the extension of the contracted state being extended by the action of an external force. Therefore, when the external force is applied, the extension portion is released from contraction and can be extended and deformed.
また、前記ライニング用帯状部材において、前記帯状部材に、幅方向の両側縁部に接合部を備えさせ、前記伸張部を、幅方向一方の接合部に隣接して設けた構成とすることが好ましい。   In the lining strip member, it is preferable that the strip member is provided with a joint portion at both side edges in the width direction, and the extension portion is provided adjacent to one joint portion in the width direction. .
これにより、前記ライニング用帯状部材を用いて流路をライニングするとき、負荷がかかりやすい接合部を変形させずに、これに隣接する伸張部を変形させることが可能となる。そのため、接合部が確実に接合されて、より一層、更生管路の信頼性を高めることが可能となる。   As a result, when the flow path is lined using the strip-shaped member for lining, it is possible to deform the extending portion adjacent thereto without deforming the joint portion that is likely to be loaded. Therefore, it is possible to reliably join the joint portion and further improve the reliability of the rehabilitation pipeline.
本発明では、ライニング用帯状部材として、伸張部と該伸張部を跨ぐスペーサ部材を備えた構成としている。このライニング用帯状部材を用いた更生管路構造では、更生対象の流路の内壁と前記スペーサ部材との間隔が、狭められて設けられる。これによって、裏込め材に生じるひび割れを制御し、地震動によって発生する流路の変位を、その内側の更生管路に対して局所的に作用させず分散させることが可能となって、更生管路の耐震性を高めるとともに地震後の更生管路の機能維持が可能となる。   In this invention, it is set as the structure provided with the expansion member and the spacer member which straddles this expansion | extension part as a strip | belt-shaped member for lining. In the rehabilitation pipe line structure using the lining belt-shaped member, the interval between the inner wall of the flow path to be rehabilitated and the spacer member is narrowed. This makes it possible to control the cracks that occur in the backfilling material and disperse the displacement of the flow path generated by the earthquake motion without acting locally on the rehabilitation pipe inside. As well as improving the earthquake resistance, it is possible to maintain the function of the rehabilitation pipeline after the earthquake.
本発明の実施の形態に係るライニング用帯状部材の断面図である。It is sectional drawing of the strip | belt-shaped member for lining which concerns on embodiment of this invention. 前記ライニング用帯状部材における本体部を示す断面図である。It is sectional drawing which shows the main-body part in the said strip | belt-shaped member for lining. 前記ライニング用帯状部材における伸張部の収縮状態を示す断面図である。It is sectional drawing which shows the contraction state of the expansion | extension part in the said strip | belt-shaped member for lining. 実施の形態に係るライニング用帯状部材の伸張状態を示す断面図である。It is sectional drawing which shows the expansion | extension state of the strip | belt-shaped member for lining which concerns on embodiment. 本発明の実施の形態に係る更生管路構造を示す部分断面図である。It is a fragmentary sectional view showing rehabilitation pipe line structure concerning an embodiment of the invention. 前記更生管路構造におけるひび割れ発生状態を示す部分断面図である。It is a fragmentary sectional view which shows the crack generation state in the said rehabilitation pipe line structure. 前記更生管路構造における、さらなるひび割れ発生状態を示す部分断面図である。It is a fragmentary sectional view which shows the further crack generation state in the said rehabilitation pipe line structure. 前記ライニング用帯状部材を用いた管路更生方法の概要を示す説明図である。It is explanatory drawing which shows the outline | summary of the pipe line renovation method using the said strip | belt member for lining. 従来のライニング用帯状部材を用いた更生管路構造を示す断面図である。It is sectional drawing which shows the rehabilitation pipe line structure using the conventional strip | belt-shaped member for lining.
以下、本発明の実施の形態に係る更生管路構造およびライニング用帯状部材について、図面を参照しつつ説明する。   Hereinafter, the rehabilitation pipeline structure and the lining strip member according to the embodiment of the present invention will be described with reference to the drawings.
(ライニング用帯状部材)
図1は、実施形態に係るライニング用帯状部材1を示す断面図である。ライニング用帯状部材(以下「帯状部材」という。)1は、例えば埋設管内に施工する更生管を形成するためのものであり、螺旋状に巻き回されて側縁部が接合されることによって管状体となされる。
(Line-shaped strip for lining)
FIG. 1 is a cross-sectional view showing a lining strip member 1 according to an embodiment. A lining strip-shaped member (hereinafter referred to as “strip-shaped member”) 1 is, for example, for forming a rehabilitation pipe to be constructed in an embedded pipe, and is wound in a spiral shape to join a side edge portion to form a tubular shape. With body.
図1に示すように、帯状部材1は、合成樹脂系材料からなる本体部(本体)2と、金属製板状材からなるスペーサ部材3とを備えている。本体部2は、長尺帯板状の平板部21と、平板部21の幅方向の側縁部に一体形成された接合部23とを備えている。なお、図1に示すように、帯状部材1を用いて形成される管状体において、管状体の内側に向けられる側を帯状部材1の表側とし、管状体の外側に向けられ既設管の内壁に面する側を帯状部材1の裏側として以下説明する。   As shown in FIG. 1, the belt-like member 1 includes a main body (main body) 2 made of a synthetic resin material and a spacer member 3 made of a metal plate-like material. The main body 2 includes a long band plate-like flat plate portion 21 and a joint portion 23 integrally formed on a side edge portion in the width direction of the flat plate portion 21. In addition, as shown in FIG. 1, in the tubular body formed using the strip-shaped member 1, the side facing the inside of the tubular body is the front side of the strip-shaped member 1, and is directed to the outside of the tubular body on the inner wall of the existing pipe. The facing side will be described below as the back side of the belt-like member 1.
本体部2は、帯状部材1の裏側に相当する、平板部21の一側面に、複数条のリブ22を備えている。リブ22は、平板部21の長手方向に沿って延びるよう連続的に立設され、断面略T字形または略L字形に形成されている。   The main body portion 2 includes a plurality of ribs 22 on one side surface of the flat plate portion 21 corresponding to the back side of the belt-shaped member 1. The ribs 22 are continuously provided so as to extend along the longitudinal direction of the flat plate portion 21, and are formed in a substantially T-shaped or substantially L-shaped cross section.
本体部2には、平板部21に連続して伸張部24が設けられている。図2に示すように、伸張部24は、平板部21に一体に形成されるとともに、平板部21に対して幅方向に連続させて形成されている。この伸張部24は、本体部2の裏側に突出する、襞状に曲がった凸条からなる。凸条は、平板部21の長手方向に沿って延びている。   The main body 2 is provided with an extending portion 24 that is continuous with the flat plate portion 21. As shown in FIG. 2, the extending portion 24 is formed integrally with the flat plate portion 21 and is formed continuously with the flat plate portion 21 in the width direction. The extending portion 24 is formed of a protruding line that protrudes on the back side of the main body 2 and is bent like a bowl. The ridge extends along the longitudinal direction of the flat plate portion 21.
伸張部24は、具体的には、断面形状が逆U字状に近似される2条の畝状部241を有している。すなわち、伸張部24は、2つの山と、それらの間の1つの谷とを備える形状に形成されている。これにより、伸張部24の断面形状が略M字形となっている。   Specifically, the extending portion 24 has two ridges 241 whose cross-sectional shape is approximated to an inverted U shape. That is, the extending portion 24 is formed in a shape including two peaks and one valley between them. Thereby, the cross-sectional shape of the extending portion 24 is substantially M-shaped.
また、伸張部24は、平板部21よりも薄肉状であり、もともとは幅方向に伸張変形および収縮変形しうるように形成されている。すなわち、伸張部24の凸条である2条の畝状部241は、本体部2の表側から見ると2条の溝となっている。図2に示すように、伸張部24のこれらの溝は幅方向にそれぞれ拡張されて伸張部24が伸張し、図3に示すように、溝が閉じられて伸張部24が収縮するように形成されている。   The extending portion 24 is thinner than the flat plate portion 21 and is originally formed so as to be capable of expanding and contracting in the width direction. That is, when viewed from the front side of the main body part 2, the two hook-shaped parts 241 that are the protrusions of the extending part 24 form two grooves. As shown in FIG. 2, these grooves of the extension 24 are expanded in the width direction so that the extension 24 extends, and as shown in FIG. 3, the grooves are closed and the extension 24 contracts. Has been.
本体部2における伸張部24の裏側方向への突出量は、特に限定されない。図示するように、伸張部24は、リブ22よりも突出するように設けられても、リブ22と同等の突出量で設けられてもよい。リブ22よりも突出させることで、伸張部24の最大伸張量が増大される。畝状部241の数も特に限定されず、伸張量に応じて適宜設定すればよい。   The amount of protrusion of the extension part 24 in the main body part 2 in the back side direction is not particularly limited. As shown in the drawing, the extending portion 24 may be provided so as to protrude from the rib 22 or may be provided with a protruding amount equivalent to that of the rib 22. By projecting from the rib 22, the maximum extension amount of the extension portion 24 is increased. The number of the hook-shaped portions 241 is not particularly limited, and may be set as appropriate according to the extension amount.
帯状部材1において、接合部23は多様な形態とされることが可能である。例示する形態では、接合部23は、一方の側縁部に第1掛結部231を備え、他方の側縁部に第2掛結部232を備えている。   In the belt-like member 1, the joint portion 23 can be formed in various forms. In the illustrated form, the joint portion 23 includes a first hook portion 231 on one side edge portion and a second hook portion 232 on the other side edge portion.
第1掛結部231は、帯状部材1における表側に開口する2条の溝部を有する。これに対応して、第2掛結部232は、帯状部材1における裏側に開口する2条の溝部を有し、第1掛結部231に嵌め込み可能とされている。この場合、第1掛結部231および第2掛結部232の溝部内には、それぞれ鉤型の断面形状の突条が、帯状部材1の厚み方向に2段に連なって設けられている。伸張部24は、第1掛結部231に隣接して設けられてなる。   The first hooking portion 231 has two groove portions that open to the front side of the band-shaped member 1. Correspondingly, the second hooking portion 232 has two groove portions that open on the back side of the band-shaped member 1 and can be fitted into the first hooking portion 231. In this case, in the groove portions of the first hooking portion 231 and the second hooking portion 232, ribs having a hook-shaped cross-sectional shape are provided in two steps in the thickness direction of the band-shaped member 1. The extending portion 24 is provided adjacent to the first hooking portion 231.
本体部2は、これらの平板部21、リブ22、接合部23、および伸張部24を備えて一体成形されている。例えば、本体部2は、ポリ塩化ビニル、ポリエチレン、ポリプロピレン等の合成樹脂を単独または適宜混合したものを材料として、押出成形などの加工手段によって形成されている。平板部21は、必要に応じて、その表面や内部がガラス繊維等で補強されてもよい。   The main body portion 2 includes the flat plate portion 21, the rib 22, the joint portion 23, and the extension portion 24 and is integrally formed. For example, the main body 2 is formed by a processing means such as extrusion molding using a single material or a mixture of synthetic resins such as polyvinyl chloride, polyethylene, and polypropylene as appropriate. The flat plate portion 21 may be reinforced with glass fiber or the like on the surface or inside as necessary.
図1に示すように、本体部2の伸張部24の裏面側には、スペーサ部材3が装着されている。スペーサ部材3は、例えば圧延鋼材などの高い剛性を有し、本体部2に比べて弾性変形域が小さく、塑性変形域が大きい金属製板状材からなる。スペーサ部材3は、伸張部24の裏側を跨ぐように屈曲した形状を有している。   As shown in FIG. 1, a spacer member 3 is attached to the back surface side of the extension part 24 of the main body part 2. The spacer member 3 is made of a metal plate-like material having a high rigidity such as a rolled steel material and having a smaller elastic deformation range and a larger plastic deformation range than the main body 2. The spacer member 3 has a shape bent so as to straddle the back side of the extending portion 24.
例示の形態では、スペーサ部材3は、金属製板状材が折曲されて幅方向の略中央部が盛り上げられ、本体部2の裏側に突出する凸部31を備えている。凸部31は、表側方向に開放された溝状に形成されている。また、凸部31は、裏側方向に、伸張部24よりも突出するとともに、複数のリブ22よりも突出する形状とされている。スペーサ部材3は帯状部材1の中で最も背高であり、裏側方向に最も突出している。この場合、凸部31は、帯状部材1の裏側から表側方向に窄まった略溝型に形成されている。   In the illustrated embodiment, the spacer member 3 is provided with a convex portion 31 that is bent from a metal plate-like material so that a substantially central portion in the width direction is raised and protrudes to the back side of the main body portion 2. The convex portion 31 is formed in a groove shape opened in the front side direction. The convex portion 31 has a shape that protrudes from the extending portion 24 and protrudes from the plurality of ribs 22 in the rear side direction. The spacer member 3 is the tallest among the strip-like members 1 and protrudes most in the back side direction. In this case, the convex portion 31 is formed in a substantially groove shape narrowed in the front side direction from the back side of the belt-like member 1.
スペーサ部材3は、凸部31の両側に連続させて、押圧部32が備えられている。押圧部32は、伸張部24の外側面に密着する部分であり、凸部31の両側縁から延設されている。2つの押圧部32は、伸張部24を差し挟んで対向する位置関係にあり、押圧部32同士の離間距離は凸部31の溝幅よりも狭く形成されている。   The spacer member 3 is provided with a pressing portion 32 so as to be continuous on both sides of the convex portion 31. The pressing portion 32 is a portion that is in close contact with the outer surface of the extending portion 24, and extends from both side edges of the convex portion 31. The two pressing portions 32 are in a positional relationship facing each other with the extending portion 24 interposed therebetween, and the separation distance between the pressing portions 32 is formed to be narrower than the groove width of the convex portion 31.
また、スペーサ部材3には、押圧部32に連続させて、凹部33が備えられている。凹部33は、凸部31の幅方向の両側に設けられ、帯状部材1の裏側方向に開放され、表側から裏側に次第に拡がった略溝型に形成されている。一方の凹部33の端縁は、第1掛結部231の外側に係止し、他方の凹部33の端縁は、リブ22の端部に係止される。これらの凹部33は、本体部2の平板部21の裏側面に沿って配設される。   Further, the spacer member 3 is provided with a concave portion 33 so as to be continuous with the pressing portion 32. The concave portions 33 are provided on both sides of the convex portion 31 in the width direction, are opened in the back side direction of the belt-like member 1, and are formed in a substantially groove shape that gradually expands from the front side to the back side. The edge of one recess 33 is locked to the outside of the first hooking portion 231, and the edge of the other recess 33 is locked to the end of the rib 22. These concave portions 33 are disposed along the back side surface of the flat plate portion 21 of the main body portion 2.
スペーサ部材3は、長尺部材である必要はなく、本体部2に対して短尺で形成されて、本体部2の長手方向に間隔をおいて複数箇所に配設されている。例えば、帯状部材1における本体部2の幅が6〜10cmである場合に、スペーサ部材3は幅が3〜6cm、長さが10〜20cmの大きさにて形成される。   The spacer member 3 does not need to be a long member, is formed in a short length with respect to the main body 2, and is disposed at a plurality of locations at intervals in the longitudinal direction of the main body 2. For example, when the width | variety of the main-body part 2 in the strip | belt-shaped member 1 is 6-10 cm, the spacer member 3 is formed in the magnitude | size whose width is 3-6 cm and length is 10-20 cm.
帯状部材1にスペーサ部材3が備えられることで、帯状部材1の断面形状が図1に示されるように保持されることが好ましい。そのため、帯状部材1の断面形状が保持される形態であれば、本体部2の長手方向に複数のスペーサ部材3が連続して配設されても、あるいは長尺のスペーサ部材3が配設されても、どのようにスペーサ部材3が設けられてもよい。また、帯状部材1の本体部2と等しい長さのスペーサ部材3が設けられてもよい。   It is preferable that the cross-sectional shape of the strip-shaped member 1 is held as shown in FIG. 1 by providing the strip-shaped member 1 with the spacer member 3. Therefore, as long as the cross-sectional shape of the belt-like member 1 is maintained, a plurality of spacer members 3 are continuously arranged in the longitudinal direction of the main body 2 or a long spacer member 3 is arranged. However, the spacer member 3 may be provided in any way. Further, a spacer member 3 having a length equal to that of the main body portion 2 of the belt-like member 1 may be provided.
これらの各部を備えたスペーサ部材3は、合成樹脂系材料からなる本体部2に比べて弾性変形域が小さく、塑性変形域が大きい。そのため、本体部2とスペーサ部材3とに同程度の変形量(ひずみ)を与えた場合、本体部2では弾性変形をさせ、スペーサ部材3では塑性変形をさせることが可能となる。また、スペーサ部材3は、凸部31、押圧部32、および凹部33を備えた構造であることにより、外力の作用で幅方向に変形し得る。   The spacer member 3 provided with these parts has a smaller elastic deformation range and a larger plastic deformation range than the main body 2 made of a synthetic resin material. Therefore, when the same deformation (strain) is applied to the main body 2 and the spacer member 3, the main body 2 can be elastically deformed, and the spacer member 3 can be plastically deformed. Moreover, the spacer member 3 can be deform | transformed in the width direction by the effect | action of external force by having the structure provided with the convex part 31, the press part 32, and the recessed part 33. FIG.
帯状部材1の製造過程で、図2に示すように、帯状部材1の本体部2は、伸張部24の溝が開いた状態で成形される。本体部2の裏側には、複数のローラ体やガイド部材が配置されて、伸張部24の2条の畝状部241がともに外方から幅方向に押圧される。これにより、図3に示すように、畝状部241は押し潰されて、畝状部241の溝がほぼ閉じられた状態となる。スペーサ部材3は、このように伸張部24を収縮させた状態で、本体部2に対して裏側から装着される。   In the manufacturing process of the band-shaped member 1, as shown in FIG. 2, the main body portion 2 of the band-shaped member 1 is molded in a state where the groove of the extending portion 24 is opened. A plurality of roller bodies and guide members are arranged on the back side of the main body 2, and both of the two hook-shaped portions 241 of the extending portion 24 are pressed in the width direction from the outside. Thereby, as shown in FIG. 3, the hook-shaped part 241 is crushed and the groove of the hook-shaped part 241 is almost closed. The spacer member 3 is attached to the main body portion 2 from the back side in a state where the extension portion 24 is contracted as described above.
図1に示すように、スペーサ部材3の押圧部32は、伸張部24の外側面に密着しており、伸張部24を挟み込むものとなる。帯状部材1は、本体部2の伸張部24が収縮した(溝が閉じられた)状態に保持されて形成される。伸張部24の両側に延びる平板部21は、伸張部24が収縮することで近接した状態となる。   As shown in FIG. 1, the pressing portion 32 of the spacer member 3 is in close contact with the outer surface of the extension portion 24 and sandwiches the extension portion 24. The band-like member 1 is formed by being held in a state in which the extension part 24 of the main body part 2 is contracted (the groove is closed). The flat plate portions 21 extending on both sides of the extension portion 24 are brought into close proximity when the extension portion 24 contracts.
図2に示すように、帯状部材1の本体部2は、伸張部24が開いた状態となるように押し出し成形される。帯状部材1の製造過程で、本体部2の裏側に複数のローラ体やガイド部材を配置し、伸張部24の凸条である2条の畝状部241をともに外方から幅方向に押圧する。これにより、図3に示すように、畝状部241は押し潰されて、畝状部241の溝がほぼ閉じられた状態となる。このように伸張部24を収縮させて閉じた状態のまま、本体部2に対して裏側からスペーサ部材3を装着する。装着後も、畝状部241の溝、さらにはこの溝の開口縁が平板部21の延長部分によってほぼ閉じられた状態となる。   As shown in FIG. 2, the main body 2 of the belt-like member 1 is extruded so that the extension 24 is in an open state. In the manufacturing process of the belt-like member 1, a plurality of roller bodies and guide members are arranged on the back side of the main body portion 2, and both the two hook-like portions 241 that are the protrusions of the extending portion 24 are pressed in the width direction from the outside. . Thereby, as shown in FIG. 3, the hook-shaped part 241 is crushed and the groove of the hook-shaped part 241 is almost closed. In this way, the spacer member 3 is attached to the main body 2 from the back side while the extension portion 24 is contracted and closed. Even after the mounting, the groove of the flange portion 241 and the opening edge of the groove are substantially closed by the extended portion of the flat plate portion 21.
なお、帯状部材1の本体部2にスペーサ部材3を装着する手法は、上述の製造過程によらずともよい。   In addition, the method of attaching the spacer member 3 to the main body portion 2 of the belt-shaped member 1 may not be based on the manufacturing process described above.
図1に示すように、スペーサ部材3の押圧部32は伸張部24の外側面に密着し、伸張部24を挟み込む。帯状部材1において、伸張部24を、あらかじめ収縮した(溝が閉じられた)状態に保持した後、スペーサ部材3を嵌め込むようにしても、また、伸張部24の裏側にスペーサ部材3を配置した後、両者を嵌め合わせることによって伸張部24の溝を閉じるようにしてもよい。あるいは、スペーサ部材3の開口幅を拡げた状態で成形し、伸張部24に跨ぐように配置した後、スペーサ部材3の押圧部32を外方から押圧し、伸張部24の溝を閉じてもよい。伸張部24の両側に延びる平板部21は、伸張部24が収縮することで互いに近接し、閉じた状態となる。   As shown in FIG. 1, the pressing portion 32 of the spacer member 3 is in close contact with the outer surface of the extension portion 24 and sandwiches the extension portion 24. In the belt-like member 1, after the extended portion 24 is held in a contracted state (the groove is closed), the spacer member 3 may be fitted, or after the spacer member 3 is disposed on the back side of the extended portion 24. The groove of the extension part 24 may be closed by fitting the two together. Alternatively, the spacer member 3 may be molded with the opening width widened and disposed so as to straddle the extended portion 24, and then the pressing portion 32 of the spacer member 3 may be pressed from the outside to close the groove of the extended portion 24. Good. The flat plate portions 21 extending on both sides of the extension portion 24 are close to each other and closed when the extension portion 24 contracts.
このように、帯状部材1は、必要箇所で伸張しうる伸張部24とスペーサ部材3とを備えたものとすることができる。帯状部材1を用いて形成される更生管路は、その内面に、伸張部24による溝状の窪みがあまり現れることがなく、その多くは確実に閉じられた状態で保持されるので、流下性能を良好に確保することができる。また、スペーサ部材3は、外力によって塑性変形することが可能であるので、変形させるために加熱等の作業を必要とせず、施工作業性を高めることができる。   As described above, the belt-like member 1 can be provided with the extending portion 24 and the spacer member 3 that can be extended at a necessary portion. The rehabilitation pipe formed by using the belt-like member 1 does not show many groove-like depressions due to the extending portion 24 on the inner surface, and many of them are securely held in a closed state. Can be secured satisfactorily. In addition, since the spacer member 3 can be plastically deformed by an external force, it is not necessary to perform an operation such as heating in order to be deformed, and the construction workability can be improved.
なお、伸張部24は、例示した形状に限定されず、断面略U字形、略V字形など、多様な形状の襞状に曲げられて本体部2の裏側に突出した構成であればどのような形状であってもよい。また、伸張部24は、第2掛結部232に隣接して設けられてもよい。   The extending portion 24 is not limited to the illustrated shape, and may be any configuration as long as it is bent into a bowl shape having various shapes such as a substantially U-shaped cross section or a substantially V-shaped cross section and protrudes from the back side of the main body portion 2. It may be a shape. Further, the extending portion 24 may be provided adjacent to the second hooking portion 232.
図1に示す形態では、スペーサ部材3の凹部33の端縁部が、本体部2の接合部23またはリブ22に係止されることによって、スペーサ部材3が本体部2に対して固定されている。本発明において、スペーサ部材3を本体部2に対して固定する方法は、これに限定されるものではなく、例えば、スペーサ部材3の凹部33や押圧部32を本体部2に接着固定するものであってもよい。   In the form shown in FIG. 1, the spacer member 3 is fixed to the main body 2 by engaging the edge portion of the recess 33 of the spacer member 3 with the joint 23 or the rib 22 of the main body 2. Yes. In the present invention, the method of fixing the spacer member 3 to the main body portion 2 is not limited to this, and for example, the concave portion 33 and the pressing portion 32 of the spacer member 3 are bonded and fixed to the main body portion 2. There may be.
(管路更生方法)
前述の帯状部材1を用いた管路更生方法について、図8を参照しつつ説明する。
(Pipe rehabilitation method)
A conduit rehabilitation method using the above-described belt-like member 1 will be described with reference to FIG.
帯状部材1は、螺旋状に巻回されて、第1掛結部231と第2掛結部232とが接合されることにより管状体をなし、所望の管径の更生管10となされる。帯状部材1を製管するには、製管機が用いられる。製管機には、多様な構造のものを使用することができ、詳細な説明を省略する。   The belt-like member 1 is spirally wound, and the first hooking portion 231 and the second hooking portion 232 are joined to form a tubular body, and the rehabilitating pipe 10 having a desired pipe diameter is formed. A pipe making machine is used to pipe the band-like member 1. The pipe making machine can have various structures, and detailed description thereof is omitted.
流路の一つである既設管6の更生に際して、帯状部材1は、ドラム71に巻き取られて施工現場に搬送される。施工現場では、所定スパンごとに設けられたマンホール61、62を利用し、帯状部材1等を既設管6内に導入し、更生管10を形成していく。   When rehabilitating the existing pipe 6 that is one of the flow paths, the belt-like member 1 is wound around the drum 71 and conveyed to the construction site. At the construction site, the manholes 61 and 62 provided for each predetermined span are used to introduce the band-like member 1 and the like into the existing pipe 6 to form the rehabilitation pipe 10.
図8に示すように、発進側マンホール61の地上には、帯状部材1を巻き重ねた回転台付きのドラム71を設置する。到達側マンホール62の地上には、発電機72を設置する。既設管6内には、製管機73および油圧ユニット74を搬入する。   As shown in FIG. 8, a drum 71 with a turntable on which the belt-like member 1 is wound is installed on the ground of the start side manhole 61. A generator 72 is installed on the ground of the arrival side manhole 62. A pipe making machine 73 and a hydraulic unit 74 are carried into the existing pipe 6.
帯状部材1を、既設管6内を進行する製管機73へと順に送り込み、製管機73において螺旋状に巻回しつつ接合する。螺旋状に巻回されることで隣接した帯状部材1は、側縁部の第1掛結部231と第2掛結部232とが段階的に嵌め合わされることで接合される。これにより、帯状部材1は管状となされ、既設管6内に残置されていく。また、第1掛結部231と第2掛結部232とを段階的に嵌め合わせることで、更生管10の管径を既設管6の内径に対応するよう調整しながら、所望の更生管10を形成することができる。   The band-shaped member 1 is sequentially fed to the pipe making machine 73 that travels in the existing pipe 6, and is joined while being spirally wound in the pipe making machine 73. The adjacent band-like members 1 wound by being spirally wound are joined by fitting the first hooking portion 231 and the second hooking portion 232 of the side edge portion in stages. As a result, the belt-like member 1 is formed into a tubular shape and is left in the existing pipe 6. In addition, by fitting the first hanging portion 231 and the second hanging portion 232 in stages, the desired rehabilitation pipe 10 is adjusted while adjusting the pipe diameter of the rehabilitation pipe 10 to correspond to the inner diameter of the existing pipe 6. Can be formed.
製管終了後、更生管10と既設管6との間隙に、硬化性モルタル等の裏込め材4を注入し、硬化させることで、既設管6の更生が完了する。   After completion of the pipe making, the rehabilitation of the existing pipe 6 is completed by injecting the back-filling material 4 such as curable mortar into the gap between the renovated pipe 10 and the existing pipe 6 and curing it.
既設管6の直線部では帯状部材1が均等間隔で巻回され、本体部2の伸張部24はスペーサ部材3に保持されて収縮状態となっている(図1参照)。したがって、既設管6に配置される更生管10の内面はほぼ平滑となり、良好な通水を実現することが可能とされる。   In the straight part of the existing pipe 6, the belt-like member 1 is wound at equal intervals, and the extension part 24 of the main body part 2 is held by the spacer member 3 and is in a contracted state (see FIG. 1). Therefore, the inner surface of the rehabilitation pipe 10 arranged in the existing pipe 6 is almost smooth, and it is possible to realize good water flow.
既設管6に管路の曲がり部があるとき、帯状部材1は、曲がり部の外側よりも内側で密に配置される。このような場合に、曲がり部の内側では、帯状部材1の伸張部24がスペーサ部材3に保持された状態で維持される。一方、曲がり部の外側では、伸張部24が伸張して、本体部2の幅を拡張させて配置される。これにより、既設管6の曲がり形状に対応した更生管10が形成される。   When the existing pipe 6 has a bent portion of the pipe line, the belt-like member 1 is arranged more densely on the inner side than on the outer side of the bent portion. In such a case, the extended portion 24 of the belt-like member 1 is maintained in the state held by the spacer member 3 inside the bent portion. On the other hand, on the outside of the bent portion, the extension portion 24 is extended and the width of the main body portion 2 is expanded. Thereby, the rehabilitation pipe | tube 10 corresponding to the bending shape of the existing pipe | tube 6 is formed.
帯状部材1におけるこのような変形は、例えば、本体部2に対して幅方向の引張力を加えることで実現される。あるいは、スペーサ部材3に対して、2つの凹部33を幅方向に引き離すような力を加えて変形させてもよい。このとき、与えられた変形量が予め定められた規定量以内であると、伸張部24の変形は弾性変形となる。伸張部24にはスペーサ部材3が装着されているので、規定量を超えた変形とはなり難く、隣接して配置された帯状部材1の伸張部24に分散して変形が生じることとなる。   Such deformation in the belt-like member 1 is realized by applying a tensile force in the width direction to the main body 2, for example. Alternatively, the spacer member 3 may be deformed by applying a force that separates the two concave portions 33 in the width direction. At this time, if the applied deformation amount is within a predetermined amount, the deformation of the extension portion 24 is elastic deformation. Since the spacer member 3 is attached to the extending portion 24, it is difficult for the deformation to exceed the specified amount, and the deformation is generated by being dispersed in the extending portion 24 of the band-shaped member 1 disposed adjacent thereto.
したがって、伸張部24において弾性変形域を超えた変形を生じる可能性が極めて低くなり、白化等の性質の低下を生じる可能性も低減する。一方、スペーサ部材3に生じる変形は、塑性変形によるものとなる。そのため、伸張部24において生じた変形は、変形を生じさせた力を除いた後もスペーサ部材3によって維持される。   Therefore, the possibility of causing deformation beyond the elastic deformation region in the extending portion 24 becomes extremely low, and the possibility of causing deterioration in properties such as whitening is also reduced. On the other hand, the deformation generated in the spacer member 3 is caused by plastic deformation. Therefore, the deformation generated in the extending portion 24 is maintained by the spacer member 3 even after removing the force causing the deformation.
(更生管路構造)
前述した帯状部材1による更生管10は、既設管6に一体化されて既設管6の内壁を被覆するライニング材となる。図5は、既設管6の管軸方向に沿った部分断面図であり、実施の形態に係る更生管路構造を示している。
(Rehabilitation pipeline structure)
The rehabilitation pipe 10 made of the band-shaped member 1 described above becomes a lining material that is integrated with the existing pipe 6 and covers the inner wall of the existing pipe 6. FIG. 5 is a partial cross-sectional view of the existing pipe 6 along the pipe axis direction, showing the rehabilitation pipe line structure according to the embodiment.
更生管10と既設管6の内壁との間には、裏込め材4が充填され一体に硬化されている。更生管10を構成する帯状部材1は、伸張部24が収縮した状態でスペーサ部材3が装着され、畝状部241は押し潰されて、畝状部241の溝がほぼ閉じられた状態となっている。これにより、既設管6と一体化された更生管10の内面は、ほぼ平滑となっている。   Between the rehabilitation pipe 10 and the inner wall of the existing pipe 6, the backfill material 4 is filled and hardened integrally. The strip-shaped member 1 constituting the rehabilitation tube 10 is mounted with the spacer member 3 in a state in which the extending portion 24 is contracted, the ridge portion 241 is crushed, and the groove of the ridge portion 241 is almost closed. ing. Thereby, the inner surface of the rehabilitation pipe | tube 10 integrated with the existing pipe | tube 6 is substantially smooth.
既設管6と帯状部材1との間の裏込め材4は、帯状部材1の裏側に隙間なく充填されている。この形態にかかる更生管路構造においては、図9に示した従来の更生管路構造とは異なり、更生管10の裏側にひび割れ誘発部5が設けられている。   The backfilling material 4 between the existing pipe 6 and the belt-like member 1 is filled on the back side of the belt-like member 1 without a gap. In the rehabilitation pipe line structure according to this embodiment, unlike the conventional rehabilitation pipe line structure shown in FIG. 9, a crack inducing portion 5 is provided on the back side of the rehabilitation pipe 10.
更生管10をなす帯状部材1において、スペーサ部材3は、リブ22よりも裏側(既設管6側)に突出して設けられている。すなわち、スペーサ部材3は、凸部31が、既設管6の内壁に対向する配置形態で、既設管6の内壁に近接して設けられている。裏込め材4は、スペーサ部材3の凸部31と、既設管6の内壁との間に、リブ22と既設管6の内壁との間よりも薄い厚みで充填されることとなる。   In the belt-like member 1 constituting the rehabilitating pipe 10, the spacer member 3 is provided so as to protrude from the rib 22 to the back side (the existing pipe 6 side). That is, the spacer member 3 is provided close to the inner wall of the existing tube 6 in such a manner that the convex portion 31 faces the inner wall of the existing tube 6. The backfilling material 4 is filled between the convex portion 31 of the spacer member 3 and the inner wall of the existing pipe 6 with a smaller thickness than between the rib 22 and the inner wall of the existing pipe 6.
このように、スペーサ部材3によって、更生管10における裏込め材4の被り厚を減少させ、裏込め材4が少ない被り厚で充填されて硬化した箇所が、ひび割れ誘発部5となされている。ひび割れ誘発部5は、更生管10の裏側において、管軸方向には均等に分散して配設され、周方向には螺旋状に連続して設けられている。   Thus, the spacer member 3 reduces the covering thickness of the backfilling material 4 in the rehabilitation pipe 10, and a portion where the backfilling material 4 is filled and cured with a small covering thickness is the crack inducing portion 5. The crack inducing portions 5 are disposed in the back side of the rehabilitated tube 10 so as to be evenly dispersed in the tube axis direction and continuously provided in a spiral shape in the circumferential direction.
かかる更生管路構造では、地震動によって既設管6に水平方向の抜出しや屈曲等の変位が生じるとき、図6に示すように、既設管6の内側ではひび割れ誘発部5においてひび割れ(クラック、亀裂)を発生させることが可能となる。ひび割れ誘発部5は、裏込め材4の被りが少ないことから、引張力または圧縮力に対して、他の箇所よりもひび割れを生じやすい構造となっている。   In such a rehabilitating pipeline structure, when the existing pipe 6 is displaced in the horizontal direction or bent due to the earthquake motion, as shown in FIG. 6, cracks (cracks) are generated in the crack inducing section 5 inside the existing pipe 6. Can be generated. The crack inducing part 5 has a structure in which cracks are more likely to occur than other parts with respect to tensile force or compressive force because the back-covering material 4 is less covered.
ひび割れ誘発部5にひび割れが発生すると、その作用を受けて、スペーサ部材3と伸張部24とがともに伸張する。帯状部材1の接合部23では、伸張等の変形が抑えられ、更生管10の水密性が保たれる。   When a crack is generated in the crack inducing portion 5, the spacer member 3 and the extending portion 24 extend together under the action. In the joint portion 23 of the belt-like member 1, deformation such as expansion is suppressed, and the water tightness of the rehabilitated tube 10 is maintained.
その結果、地震動による既設管6の変形を、裏込め材4および更生管10に対して局所的に作用させず、ひび割れ誘発部5において分散して受け止め、更生管10を既設管6の変形に追従させることが可能となる。   As a result, the deformation of the existing pipe 6 due to the seismic motion is not locally applied to the backfill material 4 and the rehabilitated pipe 10, but is distributed and received in the crack inducing part 5. It is possible to follow.
さらに大きい地震動に対しては、図7に示すように、スペーサ部材3および伸張部24がさらに伸張することで許容される。これにより、更生管10が破損するまでには到らず、局所的な変形や破壊を防ぐことができる。万一、終局的に既設管6に大きな破損を生じた場合でも、更生管10に破断や亀裂等が生じる可能性を大幅に低減することができ、土砂等の浸入を抑えることができる。その結果、地震後にも、更生管10内に通水等が可能な状態を確保することができる。   As shown in FIG. 7, even greater earthquake motion is allowed by further extending the spacer member 3 and the extending portion 24. Thereby, it does not reach until the rehabilitation pipe 10 is damaged, and local deformation and destruction can be prevented. Even if the existing pipe 6 is eventually damaged greatly, the possibility that the rehabilitated pipe 10 is broken or cracked can be greatly reduced, and the intrusion of earth and sand can be suppressed. As a result, it is possible to ensure a state where water can be passed through the rehabilitation pipe 10 even after an earthquake.
以上のように本発明に係る更生管路構造によれば、地震動等によるひび割れを、予め設定した部位に生じさせることができ、更生管10に局所的な破損が発生する可能性を低減することができ、所定の強度を備えた耐震性の高い更生管路を形成することが可能となる。   As described above, according to the rehabilitation pipe structure according to the present invention, cracks due to seismic motion or the like can be generated in a preset portion, and the possibility that local breakage occurs in the rehabilitation pipe 10 is reduced. Therefore, it is possible to form a rehabilitation pipeline having a predetermined strength and high earthquake resistance.
なお、本発明は上述した実施形態に限定されるものではなく、請求項に示した範囲での種々の変更が可能であり、伸張部24およびスペーサ部材3の形状等、多様な形態により実施することができる。   The present invention is not limited to the above-described embodiment, and various modifications within the scope shown in the claims are possible, and the invention can be implemented in various forms such as the shapes of the extension portion 24 and the spacer member 3. be able to.
帯状部材1を用いて形成されるライニング用の管状体には、前述のとおり螺旋管だけに限定されるものではなく、ライニング対象の流路の内面に沿って多数本の帯状部材1を管軸方向に配設し、相互に接合して内面をライニングしたものであってもよい。帯状部材1の長手方向と交差する方向に延びるよう、スペーサ部材3と伸張部24とが設けられればよい。また、流路は管体であるほか、コンクリートや地中をくりぬいた水路等の暗渠又は上面開放された溝及び開渠などであってもよい。流路内の流体は、水であるに限らず、液体、気体、又はこれらと固体との混合物など、どのような流体であってもよい。   The tubular body for lining formed using the belt-like member 1 is not limited to the spiral tube as described above, and a large number of belt-like members 1 are arranged along the inner surface of the flow channel to be lined. It may be arranged in the direction and bonded to each other to line the inner surface. The spacer member 3 and the extending portion 24 may be provided so as to extend in a direction intersecting with the longitudinal direction of the band-shaped member 1. In addition to the pipe body, the flow path may be concrete or a culvert such as a water channel hollowed out in the ground, or a groove or open channel that is open on the upper surface. The fluid in the flow path is not limited to water, and may be any fluid such as liquid, gas, or a mixture of these and a solid.
本発明は、既設管路などの流路の更生に好適に利用可能である。   The present invention can be suitably used for rehabilitation of a flow path such as an existing pipe line.
1 帯状部材(ライニング用帯状部材)
10 更生管
2 本体部(本体)
21 平板部
22 リブ
23 接合部
231 第1掛結部
232 第2掛結部
24 伸張部
241 畝状部
3 スペーサ部材
31 凸部
32 押圧部
33 凹部
4 裏込め材
5 ひび割れ誘発部
6 既設管
61 発進側マンホール
62 到達側マンホール
71 ドラム
72 発電機
73 製管機
74 油圧ユニット
1 Band member (Line member for lining)
10 Rehabilitation pipe 2 Main body (main body)
DESCRIPTION OF SYMBOLS 21 Flat part 22 Rib 23 Joining part 231 1st hooking part 232 2nd hooking part 24 Extension part 241 Gutter-like part 3 Spacer member 31 Convex part 32 Press part 33 Concave part 4 Backing material 5 Crack induction part 6 Existing pipe 61 Starting side manhole 62 Arrival side manhole 71 Drum 72 Generator 73 Pipe making machine 74 Hydraulic unit

Claims (4)

  1. 流路の内壁が帯状部材でライニングされ、前記内壁と前記帯状部材との間に裏込め材が設けられている更生管路構造であって、
    前記帯状部材は、前記流路の内壁側に突出するリブと、凸条状の伸張部と、前記伸張部を跨ぎ前記伸張部および前記リブよりも内壁側に突出したスペーサ部材とを備え、
    前記流路の内壁と前記スペーサ部材との間隔は、前記流路の内壁と前記リブとの間隔よりも小さいことを特徴とする更生管路構造。
    A rehabilitation pipe line structure in which the inner wall of the flow path is lined with a band-shaped member, and a backfill material is provided between the inner wall and the band-shaped member,
    The belt-shaped member includes a rib projecting toward the inner wall side of the flow path, a ridge-shaped stretched portion, and a spacer member straddling the stretched portion and projecting toward the inner wall side from the stretched portion and the rib,
    The rehabilitation pipeline structure characterized in that an interval between the inner wall of the flow path and the spacer member is smaller than a distance between the inner wall of the flow path and the rib.
  2. 流路の内面に設けられるライニング用帯状部材であって、
    凸条状の伸張部が設けられた帯状の本体と、
    前記伸張部を跨ぎ前記伸張部より突出するスペーサ部材とを備えることを特徴とするライニング用帯状部材。
    A strip-shaped member for lining provided on the inner surface of the flow path,
    A belt-like body provided with a ridge-shaped extension, and
    A strip-shaped member for lining comprising a spacer member straddling the extension portion and protruding from the extension portion.
  3. 請求項2に記載のライニング用帯状部材であって、
    前記スペーサ部材は、前記伸張部を挟むとともに、前記伸張部を収縮させた状態で取り付けられていることを特徴とするライニング用帯状部材。
    It is a strip | belt-shaped member for lining of Claim 2, Comprising:
    The strip member for lining, wherein the spacer member is attached in a state where the extension portion is sandwiched and the extension portion is contracted.
  4. 請求項2または3に記載のライニング用帯状部材であって、
    前記帯状部材は幅方向の両側縁部に接合部を備え、前記伸張部は幅方向一方の接合部に隣接して設けられてなることを特徴とするライニング用帯状部材。
    It is a strip | belt-shaped member for lining of Claim 2 or 3, Comprising:
    The belt-like member for lining, wherein the belt-like member is provided with joint portions at both side edges in the width direction, and the extension portion is provided adjacent to one joint portion in the width direction.
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