JP6956017B2 - Existing pipe rehabilitation method - Google Patents

Existing pipe rehabilitation method Download PDF

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JP6956017B2
JP6956017B2 JP2018004701A JP2018004701A JP6956017B2 JP 6956017 B2 JP6956017 B2 JP 6956017B2 JP 2018004701 A JP2018004701 A JP 2018004701A JP 2018004701 A JP2018004701 A JP 2018004701A JP 6956017 B2 JP6956017 B2 JP 6956017B2
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pipe
rehabilitation
existing pipe
long member
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JP2019124282A (en
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武司 寺尾
武司 寺尾
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Sekisui Chemical Co Ltd
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Description

本発明は、マンホールに接続された既設管の更生方法に関する。 The present invention relates to a method of rehabilitating an existing pipe connected to a manhole.

下水道等では、離間したマンホール間を地中に埋設された下水管で接続している。この既設の下水管（以下、既設管という）が老朽化して亀裂が生じると下水が地中に漏れたり、地下水が侵入する等の不都合が生じる。そこで、老朽化した既設管の内側に更生管をライニングすることにより、既設管を更生している。 In sewers, etc., separated manholes are connected by sewer pipes buried underground. If this existing sewage pipe (hereinafter referred to as an existing pipe) deteriorates and cracks occur, inconveniences such as sewage leaking into the ground or groundwater invading occur. Therefore, the existing pipe is rehabilitated by lining the rehabilitated pipe inside the old pipe.

比較的小さな径の既設管をライニングする方法について簡単に説明する。断面円形の記憶形状を有する樹脂製の更生管を断面オメガ形状に潰して上記既設管に通し、この更生管に加熱蒸気を供給して断面円形に戻すとともに圧縮空気により拡径することにより、更生管を既設管の内側にライニングする。 A method of lining an existing pipe having a relatively small diameter will be briefly described. A resin rehabilitation tube having a memory shape with a circular cross section is crushed into an omega cross section, passed through the existing tube, and heated steam is supplied to the rehabilitation tube to return it to a circular cross section and expand the diameter with compressed air to rehabilitate the tube. Line the pipe inside the existing pipe.

既設管の損傷が激しい場合には、既設管の内面の凹凸に更生管が完全に追従できず、更生管と既設管との間に隙間が生じることがある。そのため、既設管の亀裂等から侵入した地下水が上記隙間に入り込み、更生管に沿って流れてマンホールに流れ込んでしまう。このマンホールへの地下水の流れ込みを防ぐために、既設管の管端と更生管との間を全周にわたって止水材で封止するのが一般的である。
しかし、更生管は連続して長く延びており、温度の変化に伴う軸方向の伸縮量が大きいため、上記止水材を破壊することがある。 When the existing pipe is severely damaged, the rehabilitated pipe cannot completely follow the unevenness of the inner surface of the existing pipe, and a gap may occur between the rehabilitated pipe and the existing pipe. Therefore, the groundwater that has entered through the cracks in the existing pipe enters the gap, flows along the rehabilitation pipe, and flows into the manhole. In order to prevent the inflow of groundwater into the manhole, it is common to seal the space between the end of the existing pipe and the rehabilitation pipe with a water blocking material over the entire circumference.
However, since the rehabilitation pipe is continuously extended for a long time and the amount of expansion and contraction in the axial direction with a change in temperature is large, the water blocking material may be destroyed.

特許文献１の図６には、更生管を既設管にライニングした後で、ウレタンやセメントミルク等の充填剤を、更生管の端部周壁に形成した穴から更生管と既設管との間の隙間に注入して、この隙間の通路を遮断する方法が開示されている。
特許文献２の段落０００３には、従来技術として次のような止水方法が開示されている。すなわち、ガラスマットにエポキシ樹脂を含浸させた止水材を既設管の端部内側に貼り付けておき、ライニング工程での更生管の拡径により、上記止水材を更生管と既設管との間で挟み、これにより更生管と既設管との間の隙間の通路を遮断する。 In FIG. 6 of Patent Document 1, after the rehabilitation pipe is lined on the existing pipe, a filler such as urethane or cement milk is applied between the rehabilitation pipe and the existing pipe through a hole formed in the peripheral wall at the end of the rehabilitation pipe. A method of injecting into a gap to block the passage of this gap is disclosed.
Paragraph 0003 of Patent Document 2 discloses the following water stopping method as a prior art. That is, a water blocking material impregnated with an epoxy resin on a glass mat is attached to the inside of the end of the existing pipe, and the water blocking material is applied to the rehabilitation pipe and the existing pipe by expanding the diameter of the rehabilitation pipe in the lining process. It is sandwiched between them, thereby blocking the passage of the gap between the rehabilitation pipe and the existing pipe.

特開２０１５−１８６８９８号公報Japanese Unexamined Patent Publication No. 2015-186898 特開２００４−６９０５３号公報Japanese Unexamined Patent Publication No. 2004-69053

特許文献１、２の方法では、既設管と更生管の端部だけを接着しているため、更生管の中間領域での軸方向伸縮に伴う荷重が両端部の接着部に集中して加わることになり、既設管の管端に止水材を設ける場合と同様に、接着部が破壊される可能性がある。 In the methods of Patent Documents 1 and 2, since only the end portions of the existing pipe and the rehabilitation pipe are bonded, the load due to the axial expansion and contraction in the intermediate region of the rehabilitation pipe is concentrated on the bonded portions at both ends. As in the case of providing a water blocking material at the end of the existing pipe, the adhesive portion may be destroyed.

上記課題を解決するために、本発明は、既設管更生方法において、潰した状態の樹脂製更生管を既設管に挿入する更生管挿入工程と、上記既設管に対する上記更生管の軸方向の伸縮を禁じる拘束材料を含む長尺部材を、既設管の軸方向に沿って挿入する長尺部材挿入工程と、上記更生管を拡径させることにより、上記更生管を上記既設管の内周にライニングするとともに、上記既設管と上記更生管とで上記長尺部材を圧迫するライニング工程と、を備えたことを特徴とする。
上記方法によれば、拘束材料を含む長尺部材を、既設管の軸方向に沿って設けたので、温度変化に伴う更生管の伸縮方向の荷重を拘束材料により分散して負担でき、更生管の伸縮を確実に抑制ないしは禁じることができる。その結果、例えば既設管の管端またはその近傍に止水材を設けた場合には、その破壊を防止できる。 In order to solve the above problems, in the existing pipe rehabilitation method, the present invention includes a rehabilitation pipe insertion step of inserting a crushed resin rehabilitation pipe into the existing pipe, and axial expansion and contraction of the rehabilitation pipe with respect to the existing pipe. By inserting a long member containing a restraining material forbidden along the axial direction of the existing pipe and expanding the diameter of the rehabilitated pipe, the rehabilitated pipe is lined on the inner circumference of the existing pipe. In addition, it is characterized by including a lining step of pressing the long member with the existing pipe and the rehabilitation pipe.
According to the above method, since the long member including the restraint material is provided along the axial direction of the existing pipe, the load in the expansion and contraction direction of the rehabilitation pipe due to the temperature change can be dispersed and borne by the restraint material, and the rehabilitation pipe can be borne. It is possible to surely suppress or forbid the expansion and contraction of. As a result, for example, when a water blocking material is provided at or near the end of the existing pipe, its destruction can be prevented.

好ましくは、上記拘束材料が接着剤からなり、上記長尺部材が、上記接着剤を封入する封入袋を有し、上記ライニング工程において上記長尺部材が上記既設管と上記更生管とで圧迫された時に上記封入袋が破裂して、上記接着剤が上記既設管と上記更生管の隙間に供給される。
上記方法によれば、接着剤を既設管と更生管との隙間に供給するため、この隙間の少なくとも一部を封止することができ、この隙間を経てマンホールへ向かう水の流れを抑制ないしは遮断することができる。
しかも、更生管の拡径時に接着剤を封入した封入袋の破裂させることにより、接着剤を供給することができるので、接着剤を簡単に既設管と更生管の隙間に供給することができる。 Preferably, the restraining material is made of an adhesive, the long member has an encapsulating bag for encapsulating the adhesive, and the long member is pressed by the existing pipe and the rehabilitation pipe in the lining step. At that time, the sealing bag bursts, and the adhesive is supplied to the gap between the existing pipe and the rehabilitation pipe.
According to the above method, since the adhesive is supplied to the gap between the existing pipe and the rehabilitation pipe, at least a part of the gap can be sealed, and the flow of water to the manhole through this gap is suppressed or blocked. can do.
Moreover, since the adhesive can be supplied by bursting the sealing bag containing the adhesive when the diameter of the rehabilitation pipe is expanded, the adhesive can be easily supplied to the gap between the existing pipe and the rehabilitation pipe.

好ましくは、上記封入袋が上記長尺部材の長手方向に複数並べて配置されている。
上記方法によれば、接着剤を軸方向に偏らずに供給することができる。 Preferably, a plurality of the encapsulation bags are arranged side by side in the longitudinal direction of the long member.
According to the above method, the adhesive can be supplied without being biased in the axial direction.

好ましくは、上記接着剤が２液タイプの接着剤であり、上記封入袋の各々が上記長尺部材の幅方向に隣接した第１、第２の袋部を有し、上記第１の袋部に上記接着剤の主剤が封入され、上記第２の袋部に硬化剤が封入されており、上記ライニング工程において上記長尺部材が上記既設管と上記更生管とで圧迫された時に上記第１の袋部と上記第２の袋部が破裂して、上記主剤と上記硬化剤が混ざりながら上記既設管と上記更生管の隙間に供給される。
上記方法によれば、２液タイプの接着剤を用いることにより、硬化時間を温度の影響を大きく受けずに安定させることができる。 Preferably, the adhesive is a two-component type adhesive, and each of the encapsulation bags has a first and second bag portions adjacent to each other in the width direction of the long member, and the first bag portion. The main agent of the adhesive is sealed in the bag, and the curing agent is sealed in the second bag portion. When the long member is pressed by the existing pipe and the rehabilitation pipe in the lining step, the first The bag portion and the second bag portion burst, and the main agent and the curing agent are mixed and supplied to the gap between the existing pipe and the rehabilitation pipe.
According to the above method, by using a two-component type adhesive, the curing time can be stabilized without being greatly affected by temperature.

好ましくは、上記長尺部材が薄肉のチューブからなり、このチューブが長手方向に間隔をおいて間仕切りされることにより、上記複数の封入袋が形成されている。
上記方法によれば、チューブを間仕切りすることにより複数の封入袋を低コストで提供することができる。 Preferably, the long member is made of a thin-walled tube, and the tubes are partitioned at intervals in the longitudinal direction to form the plurality of encapsulation bags.
According to the above method, a plurality of sealed bags can be provided at low cost by partitioning the tubes.

他の態様では、上記拘束材料が接着剤からなり、上記長尺部材が上記接着剤を含侵させた長尺シートからなり、上記ライニング工程において上記長尺シートが上記既設管と上記更生管とで圧迫された時に、上記接着剤が上記既設管と上記更生管の隙間に供給される。
上記方法によれば、接着剤を用いることにより、封入袋を有する長尺部材を用いた場合と同様に、更生管の軸方向伸縮の抑制効果と止水効果が得られる。 In another aspect, the restraining material is made of an adhesive, the long member is made of a long sheet impregnated with the adhesive, and in the lining step, the long sheet is the existing pipe and the rehabilitation pipe. When pressed by, the adhesive is supplied to the gap between the existing pipe and the rehabilitation pipe.
According to the above method, by using the adhesive, the effect of suppressing the axial expansion and contraction of the rehabilitation pipe and the effect of stopping water can be obtained as in the case of using the long member having the sealing bag.

さらに他の態様では、上記拘束材料が摩擦材料からなり、上記長尺部材が上記摩擦材料により形成された長尺シートからなり、上記ライニング工程において上記長尺シートが上記既設管と上記更生管とで圧迫されることにより、上記既設管と上記更生管との間の摩擦を高める。
上記方法によれば、摩擦材料からなる長尺シートにより、更生管の軸方向伸縮を抑制することができる。 In still another aspect, the restraining material is made of a friction material, the long member is made of a long sheet formed of the friction material, and in the lining step, the long sheet is the existing pipe and the rehabilitation pipe. By being compressed with, the friction between the existing pipe and the rehabilitation pipe is increased.
According to the above method, the axial expansion and contraction of the rehabilitation tube can be suppressed by the long sheet made of the friction material.

好ましくは、上記更生管はΩ形状に潰されており、その凹部に上記長尺部材が挿入されている。
上記方法によれば、更生管の拡径工程の途中まで、長尺部材を安定して保持することができる。 Preferably, the rehabilitation tube is crushed into an Ω shape, and the long member is inserted into the recess.
According to the above method, the long member can be stably held until the middle of the diameter expansion process of the rehabilitation pipe.

好ましくは、上記長尺部材は上記既設管の全長にわたって挿入される。
上記方法によれば、長尺部材による更生管の拘束効果を最大限に発揮することができる。
好ましくは、上記ライニング工程の後、上記既設管の管端と上記更生管との間を全周にわたり止水材で封止する封止工程をさらに備えている。 Preferably, the long member is inserted over the entire length of the existing pipe.
According to the above method, the effect of restraining the rehabilitation pipe by the long member can be maximized.
Preferably, after the lining step, a sealing step is further provided in which the pipe end of the existing pipe and the rehabilitation pipe are sealed with a water blocking material over the entire circumference.

本発明によれば、既設管の軸方向に延びる長尺部材の拘束材料により、既設管に対する更生管の軸方向の伸縮を抑制ないしは禁じることができる。 According to the present invention, it is possible to suppress or prohibit the axial expansion and contraction of the rehabilitation pipe with respect to the existing pipe by the restraining material of the long member extending in the axial direction of the existing pipe.

本発明の第１実施形態に係る既設管更生方法を工程順に示す縦断面図であり、（Ａ）は断面Ω形状の更生管を既設管に挿入した状態、（Ｂ）は接着剤を封入した長尺部材を既設管に挿入した状態、（Ｃ）は更生管の拡径により既設管へのライニングが完了した状態、（Ｄ）は既設管の管端の封止が完了した状態、をそれぞれ示すIt is a vertical sectional view which shows the existing pipe rehabilitation method which concerns on 1st Embodiment of this invention in the order of a process, (A) is the state which inserted the rehabilitation pipe of the cross section Ω shape into the existing pipe, (B) was sealed with an adhesive. The state where the long member is inserted into the existing pipe, (C) is the state where the lining to the existing pipe is completed by expanding the diameter of the rehabilitation pipe, and (D) is the state where the sealing of the pipe end of the existing pipe is completed. show 図１（Ｂ）のII-II線に沿う横断面図である。It is a cross-sectional view along the line II-II of FIG. 1 (B). 図１（Ｃ）のIII−III線に沿う横断面図である。FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 1 (C). 上記長尺部材の一部を示す平面図である。It is a top view which shows a part of the said long member. 長尺部材の他の例を示す平面図である。It is a top view which shows another example of a long member. 本発明の第２実施形態に係る既設管更生方法を示す図２相当図である。It is a figure corresponding to FIG. 2 which shows the existing pipe rehabilitation method which concerns on 2nd Embodiment of this invention.

以下、本発明の第１実施形態に係る既設管更生方法について図面を参照しながら説明する。
図１には下水道の離間した２つのマンホール１の一部と、これらマンホール１に両端が接続され長期使用により劣化した既設管２が示されている。既設管２はマンホール１の周壁１ａを貫通している。既設管２の管端２ａは、周壁１ａの内周と略一致した位置にある。この管端２ａの内周において最も低い部分は、マンホール１の底板１ｂの上面と略同じ高さに位置している。 Hereinafter, the existing pipe rehabilitation method according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a part of two manholes 1 separated from each other in the sewerage system, and an existing pipe 2 having both ends connected to the manholes 1 and deteriorated due to long-term use. The existing pipe 2 penetrates the peripheral wall 1a of the manhole 1. The pipe end 2a of the existing pipe 2 is located at a position substantially coincident with the inner circumference of the peripheral wall 1a. The lowest portion of the inner circumference of the pipe end 2a is located at substantially the same height as the upper surface of the bottom plate 1b of the manhole 1.

以下、既設管２の更生方法を、順を追って説明する。
更生管挿入工程
最初に、図１（Ａ）、図２に示すように、断面Ω形状に潰された長尺の更生管３を、一方のマンホール１から他方のマンホール１までワイヤで牽引することにより、既設管２の全長にわたって挿入する。更生管３の両端部は、既設管２の管端２ａから突出させる。更生管３は、形状記憶機能を有する塩化ビニル樹脂からなる。更生管３の元々の断面形状は円形で、平らに潰され、さらに二つ折りにされることで断面がΩ形状になっている。 Hereinafter, the rehabilitation method of the existing pipe 2 will be described step by step.
Rehabilitation tube insertion step First, as shown in FIGS. 1A and 2, a long rehabilitation tube 3 crushed into an Ω cross section is pulled by a wire from one manhole 1 to the other manhole 1. Therefore, it is inserted over the entire length of the existing pipe 2. Both ends of the rehabilitation pipe 3 are projected from the pipe end 2a of the existing pipe 2. The rehabilitation tube 3 is made of a vinyl chloride resin having a shape memory function. The original cross-sectional shape of the rehabilitation tube 3 is circular, crushed flat, and further folded in half to form an Ω cross section.

長尺部材挿入工程
次に、図１（Ｂ）、図２に示すように、接着剤１５（拘束材料）を封入した長尺部材１０を既設管２の全長にわたって挿入する。ここで「全長」とは、長尺部材１０と既設管２の長さが、等しい場合は勿論のこと１０％未満の差異がある場合をも含む。
接着剤１５としては、耐水性、耐久性に優れ、低粘度で湿潤接着性の良い高強度なものが用いられる。例えばエポキシ樹脂、アクリル樹脂、ポリマーセメント等が用いられる。本実施形態では、１液タイプの接着剤を用いる。 Long member insertion step Next, as shown in FIGS. 1B and 2, the long member 10 in which the adhesive 15 (restraint material) is sealed is inserted over the entire length of the existing pipe 2. Here, the "total length" includes not only the case where the lengths of the long member 10 and the existing pipe 2 are equal but also the case where there is a difference of less than 10%.
As the adhesive 15, a high-strength adhesive having excellent water resistance and durability, low viscosity, and good wet adhesiveness is used. For example, epoxy resin, acrylic resin, polymer cement and the like are used. In this embodiment, a one-component type adhesive is used.

図４に示すように、長尺部材１０は、長尺の樹脂製チューブを長手方向に等間隔をおいて間仕切りすることにより、長手方向に並べられた複数の封入袋１１を有している。本実施形態では、１ｍ毎に間仕切りされ、その幅が８０ｍｍ、高さが５０ｍｍである。各封入袋１１に接着剤１５が充填されている。長尺部材１０は薄肉（１ｍｍ以下）であり、外力により破裂可能である。 As shown in FIG. 4, the long member 10 has a plurality of encapsulation bags 11 arranged in the longitudinal direction by partitioning the long resin tubes at equal intervals in the longitudinal direction. In the present embodiment, partitions are formed every 1 m, and the width thereof is 80 mm and the height is 50 mm. Each encapsulation bag 11 is filled with the adhesive 15. The long member 10 is thin (1 mm or less) and can burst by an external force.

上記長尺部材１０の一端にワイヤ１８（図１（Ｂ）にのみ示す）を連結し、このワイヤ１８を断面Ω形状の更生管３の凹部３ｘ（図２にのみ示す）に挿入して、一方のマンホール１から他方のマンホール１へと進め、このワイヤ１８を牽引することにより、長尺部材１０を更生管３の凹部３ｘに挿入する。 A wire 18 (shown only in FIG. 1B) is connected to one end of the long member 10, and the wire 18 is inserted into a recess 3x (shown only in FIG. 2) of a rehabilitation tube 3 having an Ω cross section. By advancing from one manhole 1 to the other manhole 1 and pulling the wire 18, the long member 10 is inserted into the recess 3x of the rehabilitation pipe 3.

ライニング工程
上記更生管３の一端から他端に高温蒸気を流し、更生管３を形状記憶された断面円形に戻し、さらに圧縮空気を供給して拡径することにより、図１（Ｃ）、図３に示すように、既設管２の内側に更生管３をライニングする。この際、過拡径して更生管３と既設管２との間の抵抗力を高める。これによって、更生管３が水平方向にずれにくくなる。また更生管３が冷えて収縮しようとしても、既設管２より過拡径した部分が管端に引っ掛かり、収縮しにくい。 Lining step FIG. 1 (C), FIG. As shown in 3, the rehabilitation pipe 3 is lined inside the existing pipe 2. At this time, the diameter is over-expanded to increase the resistance between the rehabilitation pipe 3 and the existing pipe 2. As a result, the rehabilitation pipe 3 is less likely to shift in the horizontal direction. Further, even if the rehabilitation pipe 3 cools and tries to shrink, a portion having an overdiameter larger than that of the existing pipe 2 is caught at the pipe end, and it is difficult to shrink.

更生管３が既設管２に向かって拡径する際に、更生管３と既設管２との間で上記長尺部材１０が圧迫され、封入袋１１が破裂し、接着剤１５が更生管３と既設管２との間の隙間に供給される。
なお、長尺部材１０は、更生管３の凹部３ｘに挿入されているので、更生管３の拡径の途中まで、安定して保持される。 When the rehabilitation pipe 3 expands in diameter toward the existing pipe 2, the long member 10 is pressed between the rehabilitation pipe 3 and the existing pipe 2, the encapsulation bag 11 bursts, and the adhesive 15 is applied to the rehabilitation pipe 3. It is supplied to the gap between the existing pipe 2 and the existing pipe 2.
Since the long member 10 is inserted into the recess 3x of the rehabilitation pipe 3, it is stably held until the middle of the diameter expansion of the rehabilitation pipe 3.

封止工程
次に、図１（Ｄ）に示すように、更生管３を、既設管２の管端２ａから所定長さを残して切断する。これにより、更生管３は突出端部３ａを有する。
次に、既設管２の管端２ａと更生管３の突出端部３ａの間を全周にわたって止水材２０で封止する。止水材２０は、例えば速乾エポキシ樹脂や急結モルタル等のパテからなる。 Sealing Step Next, as shown in FIG. 1 (D), the rehabilitation pipe 3 is cut from the pipe end 2a of the existing pipe 2 leaving a predetermined length. As a result, the rehabilitation tube 3 has a protruding end portion 3a.
Next, the space between the pipe end 2a of the existing pipe 2 and the protruding end 3a of the rehabilitation pipe 3 is sealed with the water blocking material 20 over the entire circumference. The water blocking material 20 is made of, for example, a putty such as a quick-drying epoxy resin or a quick-setting mortar.

上記更生方法によれば、既設管２と更生管３との間の隙間に供給された接着剤１５は、その効果により止水と接着の役割を担うことができる。
まず、止水機能について説明する。接着剤１５は既設管２と更生管３の隙間に充填されているので、隙間の通路の少なくとも一部を遮断できる。そのため、既設管２の亀裂から隙間に侵入し更生管３に沿って流れてきた地下水がマンホール１へと流れ込むのを抑制なしは防止することができる。本実施形態では、さらに既設管２の管端に止水材２０が形成されているので、より確実に止水することができる。 According to the above rehabilitation method, the adhesive 15 supplied to the gap between the existing pipe 2 and the rehabilitation pipe 3 can play a role of stopping water and adhering due to the effect.
First, the water blocking function will be described. Since the adhesive 15 is filled in the gap between the existing pipe 2 and the rehabilitation pipe 3, at least a part of the passage in the gap can be blocked. Therefore, it is possible to prevent the groundwater that has entered the gap through the crack in the existing pipe 2 and has flowed along the rehabilitation pipe 3 from flowing into the manhole 1. In the present embodiment, since the water blocking material 20 is further formed at the pipe end of the existing pipe 2, water can be stopped more reliably.

次に、接着剤の接着機能について説明する。上述したように既設管２と更生管３とが、接着剤１５により接着固定されているので、更生管３は既設管２に拘束されていて軸方向の熱膨張、熱収縮を禁じられる。そのため、更生管３の軸方向の伸縮による止水材２０の破壊や亀裂発生を防止することができる。しかも、接着剤１５は既設管２の全長にわたって配されているため、更生管３の軸方向の伸縮荷重を分散して負担でき、より一層確実に更生管３の伸縮を防止することができる。 Next, the adhesive function of the adhesive will be described. As described above, since the existing pipe 2 and the rehabilitation pipe 3 are adhesively fixed by the adhesive 15, the rehabilitation pipe 3 is restrained by the existing pipe 2 and axial thermal expansion and contraction are prohibited. Therefore, it is possible to prevent the water blocking material 20 from being broken or cracked due to the axial expansion and contraction of the rehabilitation pipe 3. Moreover, since the adhesive 15 is arranged over the entire length of the existing pipe 2, the expansion / contraction load in the axial direction of the rehabilitation pipe 3 can be dispersed and borne, and the expansion / contraction of the rehabilitation pipe 3 can be prevented more reliably.

２液タイプの接着剤を用いる場合、例えばクラック注入用低粘度エポキシ樹脂として、コニシ株式会社製の「Ｅ２６０１」を用いる場合は、図５に示す長尺部材１０’が用いられる。この長尺部材１０’は、薄肉の樹脂製チューブを長手方向に等間隔をおいて間仕切りして複数の封入袋１１’を形成するとともに、この封入袋１１’をチューブの幅方向（既設管２の周方向）に間仕切することにより、隣接する第1、第２の袋部１１ａ，１１ｂを形成する。第１の袋部１１ａにはエポキシ樹脂の主剤１５ａが充填され、第２の袋部１１ｂには硬化剤１５ｂが充填されている。 When a two-component type adhesive is used, for example, when "E2601" manufactured by Konishi Co., Ltd. is used as the low-viscosity epoxy resin for crack injection, the long member 10'shown in FIG. 5 is used. In the long member 10', a thin resin tube is partitioned in the longitudinal direction at equal intervals to form a plurality of encapsulation bags 11', and the encapsulation bag 11'is formed in the width direction of the tube (existing pipe 2). By partitioning in the circumferential direction of), adjacent first and second bag portions 11a and 11b are formed. The first bag portion 11a is filled with the epoxy resin main agent 15a, and the second bag portion 11b is filled with the curing agent 15b.

上記長尺部材１０’は、図４の長尺部材１０と同様にして断面Ω形状の更生管３の凹部３ｘに挿入される。長尺部材１０’は、更生管３の拡径時に圧迫されて袋部１１ａ，１１ｂが破裂し、主剤１５ａと硬化剤１５ｂが混じって既設管２と更生管３との間の隙間に供給される。
２液タイプの接着剤は、常温硬化し、環境温度に硬化時間が左右されないので有利である。 The long member 10'is inserted into the recess 3x of the rehabilitation tube 3 having an Ω cross section in the same manner as the long member 10 of FIG. The long member 10'is pressed when the diameter of the rehabilitation pipe 3 is expanded, the bag portions 11a and 11b burst, and the main agent 15a and the curing agent 15b are mixed and supplied to the gap between the existing pipe 2 and the rehabilitation pipe 3. NS.
The two-component type adhesive is advantageous because it cures at room temperature and the curing time does not depend on the environmental temperature.

図６は本発明の第２実施形態を示す。この実施形態の長尺部材１０”は、接着剤（拘束材料）を含侵させた長尺シートからなる。長尺シートはガラス繊維等からなり、既設管２の全長にわたって、更生管３の凹部３ｘに挿入される。長尺部材１０”は、更生管３の拡径時に圧迫され、含侵された接着剤が既設管２と更生管３の隙間に供給される。 FIG. 6 shows a second embodiment of the present invention. The long member 10 "of this embodiment is made of a long sheet impregnated with an adhesive (restraint material). The long sheet is made of glass fiber or the like, and is a recess of the rehabilitation pipe 3 over the entire length of the existing pipe 2. The long member 10 "which is inserted into 3x is pressed when the diameter of the rehabilitation pipe 3 is expanded, and the impregnated adhesive is supplied to the gap between the existing pipe 2 and the rehabilitation pipe 3.

上記長尺部材１０”は、ゴム（摩擦材料）からなる長尺シートでもよい。この長尺部材１０”は、更生管３の拡径により圧迫され、既設管２に対する更生管３の軸方向伸縮の摩擦抵抗となる。 The long member 10 "may be a long sheet made of rubber (friction material). The long member 10" is compressed by the expansion of the diameter of the rehabilitation pipe 3 and expands and contracts in the axial direction of the rehabilitation pipe 3 with respect to the existing pipe 2. It becomes the frictional resistance of.

本発明は、上記実施形態に限定されるものではなく、その趣旨に反しない限りにおいて種々の改変をなすことができる。
接着剤を封入した封入袋は、紐又は薄肉シートにより連ねるようにしてもよい。
更生管の「拡径」は、断面円形への復元を含む。例えば、更生管が高温蒸気により潰れた状態から膨らんで記憶された断面円形に復元され、この復元された更生管の外径が既設管の内径と等しい場合も含む。
既設管は下水管のみならずケーブル保護管等であってもよい。 The present invention is not limited to the above embodiment, and various modifications can be made as long as it does not contradict the gist thereof.
The sealed bags filled with the adhesive may be connected by a string or a thin-walled sheet.
The "diameter expansion" of the rehabilitation tube includes restoration to a circular cross section. For example, the case where the rehabilitation pipe is restored to a memorized circular cross section by swelling from the state of being crushed by high temperature steam, and the outer diameter of the restored rehabilitation pipe is equal to the inner diameter of the existing pipe is also included.
The existing pipe may be a cable protection pipe or the like as well as a sewer pipe.

本発明は、下水道等の既設管を更生する方法に適用することができる。 The present invention can be applied to a method of rehabilitating an existing pipe such as a sewer.

１ マンホール
２ 既設管
２ａ 管端
３ 更生管
３ａ 突出端部
１０，１０’，１０” 長尺部材
１１，１１’ 封入袋
１１ａ 第１袋部
１１ｂ 第２袋部
１５ 接着剤
１５ａ 主剤
１５ｂ 硬化剤
２０ 止水材
1 Manhole 2 Existing pipe 2a Pipe end 3 Rehabilitation pipe 3a Protruding end 10, 10', 10 "Long member 11, 11' Encapsulation bag 11a First bag 11b Second bag 15 Adhesive 15a Main agent 15b Hardener 20 Water blocking material

Claims (5)

潰した状態の樹脂製更生管を既設管に挿入する更生管挿入工程と、
上記既設管に対する上記更生管の軸方向の伸縮を禁じる拘束材料を含む長尺部材を、既設管の軸方向に沿って挿入する長尺部材挿入工程と、
上記更生管を拡径させることにより、上記更生管を上記既設管の内周にライニングするとともに、上記既設管と上記更生管とで上記長尺部材を圧迫するライニング工程と、
を備え、
上記拘束材料が接着剤からなり、上記長尺部材が、上記接着剤を封入する封入袋を有し、上記ライニング工程において上記長尺部材が上記既設管と上記更生管とで圧迫された時に上記封入袋が破裂して、上記接着剤が上記既設管と上記更生管の隙間に供給されることを特徴とする既設管更生方法。 The rehabilitation pipe insertion process of inserting the crushed resin rehabilitation pipe into the existing pipe,
A long member insertion step of inserting a long member including a restraining material that prohibits expansion and contraction of the rehabilitation pipe in the axial direction with respect to the existing pipe along the axial direction of the existing pipe.
By expanding the diameter of the rehabilitation pipe, the rehabilitation pipe is lined on the inner circumference of the existing pipe, and the existing pipe and the rehabilitation pipe press the long member with the lining step.
With
When the restraining material is made of an adhesive, the long member has an encapsulating bag for encapsulating the adhesive, and the long member is pressed by the existing pipe and the rehabilitation pipe in the lining step, the above. An existing pipe rehabilitation method, wherein the sealing bag bursts and the adhesive is supplied to the gap between the existing pipe and the rehabilitation pipe. 上記封入袋が上記長尺部材の長手方向に複数並べて配置されていることを特徴とする請求項１に記載の既設管更生方法。 Existing pipe rehabilitation method according to claim 1, said encapsulating bag is characterized in that it is arranged more in the longitudinal direction of the elongated member. 上記接着剤が２液タイプの接着剤であり、上記封入袋の各々が上記長尺部材の幅方向に隣接した第１、第２の袋部を有し、上記第１の袋部に上記接着剤の主剤が封入され、上記第２の袋部に硬化剤が封入されており、
上記ライニング工程において上記長尺部材が上記既設管と上記更生管とで圧迫された時に上記第１の袋部と上記第２の袋部が破裂して、上記主剤と上記硬化剤が混ざりながら上記既設管と上記更生管の隙間に供給されることを特徴とする請求項２に記載の既設管更生方法。 The adhesive is a two-component type adhesive, and each of the enclosed bags has first and second bag portions adjacent to each other in the width direction of the long member, and the adhesive is attached to the first bag portion. The main agent of the agent is sealed, and the curing agent is sealed in the second bag portion.
When the long member is pressed by the existing pipe and the rehabilitation pipe in the lining step, the first bag portion and the second bag portion burst, and the main agent and the curing agent are mixed while being mixed. The method for rehabilitating an existing pipe according to claim 2 , wherein the pipe is supplied to a gap between the existing pipe and the rehabilitated pipe. 上記長尺部材が薄肉のチューブからなり、このチューブが長手方向に間隔をおいて間仕切りされることにより、上記複数の封入袋が形成されていることを特徴とする請求項２または３に記載の既設管更生方法。 The second or third claim, wherein the long member is made of a thin-walled tube, and the tubes are partitioned at intervals in the longitudinal direction to form the plurality of encapsulation bags. Existing pipe rehabilitation method. 潰した状態の樹脂製更生管を既設管に挿入する更生管挿入工程と、
上記既設管に対する上記更生管の軸方向の伸縮を禁じる拘束材料を含む長尺部材を、既設管の軸方向に沿って挿入する長尺部材挿入工程と、
上記更生管を拡径させることにより、上記更生管を上記既設管の内周にライニングするとともに、上記既設管と上記更生管とで上記長尺部材を圧迫するライニング工程と、
を備え、
上記拘束材料が接着剤からなり、上記長尺部材が上記接着剤を含侵させた長尺シートからなり、
上記ライニング工程において上記長尺シートが上記既設管と上記更生管とで圧迫された時に、上記接着剤が上記既設管と上記更生管の隙間に供給されることを特徴とする既設管更生方法。 The rehabilitation pipe insertion process of inserting the crushed resin rehabilitation pipe into the existing pipe,
A long member insertion step of inserting a long member including a restraining material that prohibits expansion and contraction of the rehabilitation pipe in the axial direction with respect to the existing pipe along the axial direction of the existing pipe.
By expanding the diameter of the rehabilitation pipe, the rehabilitation pipe is lined on the inner circumference of the existing pipe, and the existing pipe and the rehabilitation pipe press the long member with the lining step.
With
The restraining material is made of an adhesive, and the long member is made of a long sheet impregnated with the adhesive.
An existing pipe rehabilitation method, characterized in that, when the long sheet is pressed between the existing pipe and the rehabilitation pipe in the lining step, the adhesive is supplied to the gap between the existing pipe and the rehabilitation pipe.
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