JP2005207122A - Method for protecting and fixing cable - Google Patents

Method for protecting and fixing cable Download PDF

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Publication number
JP2005207122A
JP2005207122A JP2004014924A JP2004014924A JP2005207122A JP 2005207122 A JP2005207122 A JP 2005207122A JP 2004014924 A JP2004014924 A JP 2004014924A JP 2004014924 A JP2004014924 A JP 2004014924A JP 2005207122 A JP2005207122 A JP 2005207122A
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Prior art keywords
cable
deflection
epoxy resin
tube
covering material
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JP2004014924A
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JP3602124B1 (en
Inventor
Tsutomu Sumiya
務 角谷
Yasuo Iguma
康夫 猪熊
Norio Terada
典生 寺田
Keiichi Aoki
圭一 青木
Yoshitaka Nishida
吉孝 西田
Toshikazu Minami
敏和 南
Masato Yamada
真人 山田
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Sumitomo SEI Steel Wire Corp
Japan Highway Public Corp
Anderson Technology Corp
Kobelco Wire Co Ltd
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Shinko Wire Co Ltd
Sumitomo SEI Steel Wire Corp
Japan Highway Public Corp
Anderson Technology Corp
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Application filed by Shinko Wire Co Ltd, Sumitomo SEI Steel Wire Corp, Japan Highway Public Corp, Anderson Technology Corp filed Critical Shinko Wire Co Ltd
Priority to JP2004014924A priority Critical patent/JP3602124B1/en
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Publication of JP3602124B1 publication Critical patent/JP3602124B1/en
Publication of JP2005207122A publication Critical patent/JP2005207122A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To simply and efficiently display good fixing performance on a cable by protecting the cable penetrating a deflection part in a bridge. <P>SOLUTION: A method for protecting and fixing the cable comprises a process for removing a coating material 52 from part 30 of the cable 3 passing through the deflection pipe 2 in a deflection part 1. The part corresponds to an abdominal pressure acting section in at least a deflection pipe 2 of a deflection pipe route, a process for inserting the cable 3 from which the coating material 52 is removed in the deflection pipe 2, and a process for filling an epoxy resin 7 in the deflection pipe 2 and coating the part 30 of the cable 3 from which at least the coating material 52 is removed with the epoxy resin 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、橋梁におけるサドル構造などの偏向部を挿通するケーブルの保護方法、ケーブル保護構造および当該ケーブル保護構造を備えた構造体、ならびにケーブル固定装置に関する。   The present invention relates to a method for protecting a cable that passes through a deflection portion such as a saddle structure in a bridge, a cable protection structure, a structure including the cable protection structure, and a cable fixing device.

ケーブル保護の手法として、例えば、PCケーブルを内包し且つ内部にグラウトが充填されるシースであって、内周面に、管軸方向に間隔をおいて複数の円周方向の凹部を有するものにおいて、それら凹部同士を連絡する連通部を形成してなることを特徴とするPCケーブル用保護シース(特許文献1参照)などが提案されている。   As a cable protection method, for example, in a sheath that encloses a PC cable and is filled with grout inside, and has a plurality of circumferential recesses on the inner peripheral surface at intervals in the tube axis direction A protective sheath for a PC cable (see Patent Document 1), which is characterized by forming a communication portion that connects the recesses, has been proposed.

また、斜張橋等の斜材がサドル部で貫通する場合、滑動しないように従来から様々のケーブル固定装置が考案されている。例えば、 斜張橋の支持柱に貫通して埋設される外管と、前記外管内に遊挿入される内管との二重管構造を有し、ケーブルを前記内管内に挿通して注入充填材で固着させる偏向部体であって、少なくとも2分割した本体の内面がテーパ形状を成し、前記内管内の両端部に介挿されてケーブル周囲の管口を封栓するスペーサと、前記外管の両端部の外側で前記支持柱に埋設されるアンカー部材と、前記アンカー部材に支持固定されて前記外管の端部及び前記スペーサに外側から押当てられる押さえブロックとを含むことを特徴とする斜張橋ケーブル用偏向部体(特許文献2参照)などが提案されている。
特開2002−81170号公報 特開平11−280021号公報
Also, various cable fixing devices have been conventionally devised so as not to slide when a diagonal member such as a cable-stayed bridge penetrates the saddle portion. For example, it has a double-pipe structure consisting of an outer pipe that is buried through the support pillar of a cable-stayed bridge and an inner pipe that is loosely inserted into the outer pipe, and a cable is inserted into the inner pipe for injection filling. A deflecting member to be fixed with a material, wherein the inner surface of the main body divided into at least two parts has a tapered shape and is inserted into both end portions of the inner tube to seal a tube port around the cable; An anchor member embedded in the support column outside the both ends of the tube; and a pressing block supported and fixed to the anchor member and pressed against the end of the outer tube and the spacer from the outside. A cable-stayed bridge cable deflecting body (see Patent Document 2) and the like have been proposed.
JP 2002-81170 A JP-A-11-280021

しかし、箱桁橋における外ケーブルや斜張橋等の斜材等がサドル部などの偏向部を貫通するケーブルに関し、前記偏向部においてかかる腹圧による損傷等から保護する手法は提案されてこなかった。   However, no method has been proposed to protect against damage caused by abdominal pressure in the deflecting part, with respect to the cable in which the outer cable in the box girder bridge or the diagonal member such as the cable stayed bridge penetrates the deflecting part such as the saddle part. .

また、ケーブル固定装置に関し、各種従来手法においては、例えば外管に溶接するフランジ、スペーサー、押さえ金具、そしてアンカーボルトといった具合に多様な部品をケーブル固定装置に用いる必要があった。   Further, regarding the cable fixing device, in various conventional methods, for example, various parts such as a flange welded to the outer tube, a spacer, a holding metal fitting, and an anchor bolt need to be used for the cable fixing device.

そのため、使用部品数が多くなって、工数やコストを適宜に抑制することが難しかった。また、多くの部品を組み合わせて使用することで固定装置の構造(偏向部への取付け構造含む)が煩雑となりやすく、作業効率が良好とはならなかった。したがって、例えば偏向部を挟んで両側のケーブル間の張力差が、ケーブル緊張力に比して小さいといった場合には、経済的な手法とは言い難かった。   For this reason, the number of parts used is increased, and it is difficult to appropriately reduce man-hours and costs. In addition, the use of a combination of many parts tends to complicate the structure of the fixing device (including the attachment structure to the deflection unit), and the working efficiency has not been improved. Therefore, for example, when the difference in tension between the cables on both sides of the deflection unit is small compared to the cable tension, it is difficult to say that the method is economical.

また他方、ケーブルに亜鉛メッキPC鋼より線を採用する場合など、ソケットに充填する充填材としてセメントグラウト等を用いれば、前記ケーブルが含む亜鉛とセメントグラウトが反応して水素ガスを発生する惧れもあった。この場合、ケーブルのメッキ膜が減じたり水素脆性の危惧を伴うこととなった。   On the other hand, when galvanized PC steel wire is used for the cable, if cement grout or the like is used as a filler filling the socket, the zinc contained in the cable and the cement grout may react to generate hydrogen gas. There was also. In this case, the plating film of the cable is reduced, and there is a risk of hydrogen embrittlement.

更に、セメントグラウトとケーブルと間で良好な付着力を発現するためには、相応の付着長をとる必要があり、前記したケーブル緊張力の差が大きい場合など、ソケット内空にテーパ加工を施したり、或いは固定装置自体を大型化するなど、ケーブル固定方法自体も煩雑で手間のかかるものとなっていた。   Furthermore, in order to develop a good adhesion between the cement grout and the cable, it is necessary to take a suitable adhesion length, and when the difference in cable tension is large, the socket inner space is tapered. The cable fixing method itself is complicated and troublesome, such as increasing the size of the fixing device itself.

そこで本発明の目的は、橋梁における偏向部を貫通するケーブルの保護を可能とし、また、このケーブルについて良好な固定性能を簡便かつ効率的に発現可能とするケーブルの保護方法、ケーブル保護構造および当該ケーブル保護構造を備えた構造体、ならびにケーブル固定装置を提供することにある。   Accordingly, an object of the present invention is to provide a cable protection method, a cable protection structure, and a cable protection structure that enable protection of a cable that passes through a deflection portion in a bridge, and that can easily and efficiently express good fixing performance of the cable. An object of the present invention is to provide a structure having a cable protection structure and a cable fixing device.

上記課題を解決する本発明のケーブル保護方法は、橋梁におけるサドル構造の偏向部を挿通するケーブルの保護方法であって、前記ケーブルが、複数の亜鉛メッキPC鋼より線を束ねた束線を充填材により断面略円形に成形すると共に、この成形した束線の外周を高密度ポリエチレンで被覆し一体成形したプレファブ型ケーブルであり、前記偏向部における偏向管内を挿通するケーブルのうち、前記偏向管経路のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去する工程と、前記被覆材の除去がなされたケーブルを前記偏向管に挿通する工程と、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆する工程と、を含むことを特徴とする(第1の発明)。 The cable protection method of the present invention that solves the above problem is a cable protection method for inserting a deflection portion of a saddle structure in a bridge, wherein the cable is filled with a bundle of bundles of galvanized PC steel wires A prefabricated cable that is molded into a substantially circular cross section with a material and is integrally formed by coating the outer periphery of the bundled wire with high-density polyethylene, and the deflection pipe path of the cables that pass through the deflection pipe in the deflection section A step of removing a covering material at a portion corresponding to an abdominal pressure acting section which is a pressure- contacting section between the cable and the deflecting pipe, and a step of inserting the cable from which the covering material has been removed into the deflecting pipe. The deflection tube is filled with an epoxy resin, and at least a portion of the cable from which the coating material is removed is covered with the epoxy resin. And that step, characterized in that it comprises a (first invention).

第2の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルの保護方法であって、前記ケーブルが、少なくとも、ケーブルと前記偏向部における偏向管との圧接区間たる前記腹圧作用区間よりも偏向部外方の部位について、少なくともその内部に止水処理を施したものであり、前記偏向部における偏向管内を挿通するケーブルのうち、前記偏向管経路のうち少なくとも当該偏向管内における前記腹圧作用区間にあたる部位の被覆材を除去する工程と、前記被覆材の除去がなされたケーブルを前記偏向管に挿通する工程と、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆する工程と、を含むことを特徴とする2nd invention is a protection method of the cable which penetrates the deflection | deviation part of the saddle structure in a bridge | bridging, Comprising: The said cable is more than the said abdominal pressure action area which is a pressure-contact area of a cable and the deflection | deviation pipe | tube in the said deflection | deviation part. About the part outside the deflection unit, at least the inside thereof is subjected to a water stop treatment, and among the cables that pass through the deflection tube in the deflection unit, the abdominal pressure action in at least the deflection tube in the deflection tube path A step of removing the covering material corresponding to the section; a step of inserting the cable from which the covering material has been removed; and a step of filling the deflection tube with an epoxy resin, wherein at least the covering material of the cables is And a step of covering the removed portion with an epoxy resin .

第3の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルの保護方法であって、前記偏向部における偏向管内を挿通するケーブルのうち、前記偏向管経路のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去する工程と、前記被覆材の除去がなされたケーブルを前記偏向管に挿通する工程と、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆する工程と、前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、前記偏向部表面から所定長の部位の被覆材を除去する工程と、前記被覆材が除去された所定長の部位を内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットを用いて、前記所定長の部位を内包し当該ソケット内空にエポキシ樹脂を充填する工程と、前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートを、前記ソケットと前記偏向部とに固定する工程と、を備えることを特徴とする3rd invention is a protection method of the cable which penetrates the deflection | deviation part of the saddle structure in a bridge, Comprising: The cable in at least the said deflection | deviation pipe | tube among the said deflection | deviation pipe | tube paths among the cables penetrated in the deflection | deviation pipe | tube in the said deflection | deviation part A step of removing the covering material corresponding to the abdominal pressure acting section which is a pressure contact section between the bending tube, a step of inserting the cable from which the covering material has been removed, and a step of filling the deflection tube with epoxy resin A step of covering at least a portion of the cable from which the covering material has been removed with an epoxy resin, and of a cable protruding from the deflection unit surface through a deflection tube in the deflection unit and having a predetermined length from the deflection unit surface. A step of removing the covering material at the portion of the portion, and an inner space capable of enclosing the portion of the predetermined length from which the covering material has been removed, and the portion having a predetermined sealing property Using a socket that encloses the predetermined length and filling the space inside the socket with epoxy resin, and between the socket and the deflecting portion surface, the covering material is removed and the predetermined length is removed. And a step of fixing a plate for transmitting tension of the cable to the deflecting unit through an adhesive force between the part and the epoxy resin to the socket and the deflecting unit .

第4の発明は、第3の発明において、前記ソケットは、その側断面において対向する内空表面が略平行である形状を備えると共に、ケーブル長さ方向に分割あるいは開口が可能な構造と、エポキシ樹脂の注入口および排出口とを備えるものであることを特徴とするAccording to a fourth invention, in the third invention, the socket has a shape in which the inner surfaces facing each other in a side cross section thereof are substantially parallel, a structure that can be divided or opened in the cable length direction, and an epoxy It is characterized by comprising a resin inlet and outlet .

第5の発明は、第3または第4の発明において、前記偏向管および前記プレートを前記ソケットが一体に備え、ソケットを偏向部に固定することを特徴とするThe fifth invention is characterized in that, in the third or fourth invention, the socket is integrally provided with the deflection tube and the plate, and the socket is fixed to the deflection section .

第6の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルの保護方法であって、前記偏向部における、偏向管の内管内を挿通するケーブルのうち、前記偏向管の内管経路のうち少なくとも当該内管内における、ケーブルと内管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去する工程と、前記被覆材の除去がなされたケーブルを前記内管に挿通する工程と、前記偏向管の内管にエポキシ樹脂の充填を行うに先立ち、前記内管の端部開口と前記ケーブル外周との間を止水処理する工程と、前記内管において前記止水処理の位置よりも偏向部内方側に設けた注入口に対し、エポキシ樹脂の充填を行って前記内管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆する工程と、を含むことを特徴とする6th invention is the protection method of the cable which penetrates the deflection | deviation part of the saddle structure in a bridge, Comprising: Of the cables which penetrate the inside of the inner pipe | tube of a deflection | deviation pipe | tube in the said deflection | deviation part, At least the step of removing the covering material corresponding to the abdominal pressure acting section that is the pressure contact section between the cable and the inner pipe in the inner pipe, the step of inserting the cable from which the covering material has been removed, and the inner pipe, Prior to filling the inner pipe of the deflection pipe with epoxy resin, a step of water stop treatment between the end opening of the inner pipe and the outer periphery of the cable, and the inner pipe is deflected more than the position of the water stop treatment. The injection port provided on the inner side of the section is filled with an epoxy resin to fill the inner tube with the epoxy resin, and at least a portion of the cable where the covering material is removed is covered with the epoxy resin. Characterized in that it comprises the steps of, a.

第7の発明は、第6の発明において、前記内管において前記注入口とは偏向部を挟んだ対向位置にあって前記止水処理の位置よりも偏向部内方側に設けた排出口から、前記注入口より充填されたエポキシ樹脂が排出されたことをもってエポキシ樹脂の充填を終了することを特徴とするA seventh invention is the sixth invention according to the sixth invention, from the discharge port provided in the deflecting portion inward of the inner pipe with respect to the injection port in the inner pipe at a position opposite to the pouring portion sandwiched by the deflecting portion, The filling of the epoxy resin is terminated when the filled epoxy resin is discharged from the injection port .

第8の発明は、第1〜第7のいずれかの発明において、前記橋梁をトラス橋とすることを特徴とするAccording to an eighth invention , in any one of the first to seventh inventions, the bridge is a truss bridge .

第9の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造であって、前記ケーブルが、複数の亜鉛メッキPC鋼より線を束ねた束線を充填材により断面略円形に成形すると共に、この成形した束線の外周を高密度ポリエチレンで被覆し一体成形したプレファブ型ケーブルであり、前記偏向部における偏向管内のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなることを特徴とする。 9th invention is a structure which protects the cable inserted in the deflection | deviation part of the saddle structure in a bridge | bridging, Comprising : The said cable bundled the bundle wire which bundled the wire from several galvanized PC steel, and cross-section was substantially circular by the filler. A prefabricated cable in which the outer circumference of the bundled wire is molded and integrally molded with high-density polyethylene, and is a pressure contact section between the cable and the deflection tube in at least the deflection tube in the deflection section. The cable from which the covering material at the portion corresponding to the abdominal pressure action section is removed is inserted into the deflection tube, and the deflection tube is filled with epoxy resin, and at least the portion of the cable from which the covering material is removed is covered with epoxy resin. It is characterized by becoming.

第10の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造であって、前記ケーブルが、少なくとも、ケーブルと前記偏向部における偏向管との圧接区間たる前記腹圧作用区間よりも偏向部外方の部位について、少なくともその内部に止水処理を施したものであり、前記偏向部における偏向管内のうち少なくとも当該偏向管内における前記腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなることを特徴とするA tenth aspect of the invention is a structure for protecting a cable inserted through a deflection portion of a saddle structure in a bridge, wherein the cable is at least from the abdominal pressure acting section which is a pressure contact section between the cable and the deflection pipe in the deflection section. Also, the cable outside the deflecting portion is subjected to water stop treatment at least inside thereof, and the cable in which the covering material is removed from at least the portion corresponding to the abdominal pressure acting section in the deflecting tube in the deflecting tube. Is inserted into the deflection tube, and the deflection tube is filled with an epoxy resin, and at least a portion of the cable from which the covering material has been removed is coated with the epoxy resin .

第11の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造であって、前記偏向部における偏向管内のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆し、前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、前記偏向部表面からの所定長の被覆材を除去した部位を、当該部位を内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットを用いて内包し、当該ソケット内空にエポキシ樹脂を充填し、前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートを、前記ソケットと前記偏向部とに固定してなることを特徴とするAn eleventh aspect of the invention is a structure for protecting a cable inserted through a deflection portion of a saddle structure in a bridge, and at least abdominal pressure as a pressure contact section between the cable and the deflection tube in the deflection tube in the deflection portion. Insert the cable from which the covering material corresponding to the working section has been removed through the deflection tube, fill the deflection tube with epoxy resin, and coat at least the portion of the cable from which the coating material has been removed with the epoxy resin, Of the cable protruding from the surface of the deflecting unit through the deflecting tube in the deflecting unit, the site from which the covering material having a predetermined length from the surface of the deflecting unit is removed has an internal space that can contain the site and has a predetermined sealing Enclosed using a socket that encloses the part under the property, and filled the space inside the socket with an epoxy resin, between the socket and the surface of the deflection unit Then, a plate for transmitting the tension of the cable to the deflecting unit through an adhesion force between the predetermined length portion from which the covering material is removed and the epoxy resin is fixed to the socket and the deflecting unit. It is characterized by .

第12の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルを保護する構造であって、前記偏向部における偏向管の内管経路のうち少なくとも当該内管内における、ケーブルと内管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管の内管内を挿通し、前記偏向管の内管にエポキシ樹脂の充填を行うに先立ち、前記内管の端部開口と前記ケーブル外周との間を止水処理し、前記内管において前記止水処理の位置よりも偏向部内方側に設けた注入口に対し、エポキシ樹脂の充填を行って前記内管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなることを特徴とする。 A twelfth invention is a structure that protects the cable for inserting the deflecting portion of the saddle structure in the bridge, at least in the inner tube of the inner tube path of the deflected tube in the deflection unit, the cable and the inner tube the press contact sections serving abdomen to remove the portion covering material falls for interval pressure acting cable, inserted through inside the inner tube of the deflection tube, prior to performing the filling of epoxy resin into the inner tube of the deflection tube, the end of the inner tube The gap between the opening of the cable and the outer periphery of the cable is water-stopped, and the inner pipe is filled with epoxy resin to the injection port provided on the inner side of the deflecting part from the position of the water-stop process. An epoxy resin is filled, and at least a portion of the cable from which the covering material is removed is covered with an epoxy resin .

第13の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造を備えた構造体であって、前記ケーブルが、複数の亜鉛メッキPC鋼より線を束ねた束線を充填材により断面略円形に成形すると共に、この成形した束線の外周を高密度ポリエチレンで被覆し一体成形したプレファブ型ケーブルであり、前記偏向部における偏向管内のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなるケーブル保護構造を備えたことを特徴とする。 A thirteenth aspect of the invention is a structure provided with a structure for protecting a cable inserted through a deflection portion of a saddle structure in a bridge, wherein the cable includes a bundle of bundles of galvanized PC steel bundles. Is a prefabricated cable in which the outer periphery of the formed bundle is covered with high-density polyethylene and integrally molded, and the cable and the deflection tube in at least the deflection tube in the deflection unit The cable from which the covering material in the portion corresponding to the abdominal pressure acting section that is the pressure contact section is removed is inserted into the deflection tube, and the deflection tube is filled with epoxy resin, and at least the covering material is removed from the cable It is characterized by having a cable protection structure formed by coating with an epoxy resin.

第14の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造を備えた構造体であって、前記ケーブルが、少なくとも、ケーブルと前記偏向部における偏向管との圧接区間たる前記腹圧作用区間よりも偏向部外方の部位について、少なくともその内部に止水処理を施したものであり、前記偏向部における偏向管内のうち少なくとも当該偏向管内における前記腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなるケーブル保護構造を備えたことを特徴とする構造体14th invention is a structure provided with the structure which protects the cable inserted in the deflection | deviation part of the saddle structure in a bridge | bridging, Comprising: The said cable is a pressure contact area of the cable and the deflection | deviation pipe | tube in the said deflection | deviation part at least Covering at least the portion corresponding to the abdominal pressure acting section in the deflection tube in the deflection tube of the deflection portion, which has been subjected to water stop treatment at least inside the deflection portion outside the abdominal pressure acting section A cable protection structure formed by inserting the cable from which the material has been removed into the deflection tube, filling the deflection tube with an epoxy resin, and coating at least a portion of the cable from which the covering material has been removed with the epoxy resin. A structure characterized by that .

第15の発明は、橋梁におけるサドル構造の偏向部に挿通するケーブルを保護する構造を備えた構造体であって、前記偏向部における偏向管内のうち少なくとも当該偏向管内における、ケーブルと偏向管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆し、前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、前記偏向部表面からの所定長の被覆材を除去した部位を、当該部位を内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットを用いて内包し、当該ソケット内空にエポキシ樹脂を充填し、前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートを、前記ソケットと前記偏向部とに固定してなるケーブル保護構造を備えたことを特徴とする構造体According to a fifteenth aspect of the present invention , there is provided a structure having a structure for protecting a cable inserted into a deflection portion of a saddle structure in a bridge, wherein at least a portion of the deflection tube in the deflection portion includes a cable and a deflection tube. A cable from which the covering material corresponding to the abdominal pressure acting section which is the pressure contact section is removed is inserted into the deflection tube, and the deflection tube is filled with epoxy resin, and at least the portion of the cable from which the covering material has been removed is epoxy. Of the cable covered with resin and inserted through the deflection tube in the deflection unit and projecting from the deflection unit surface, the part of the cable from which the coating material of a predetermined length from the deflection unit surface is removed has an inner space that can contain the part. And having a predetermined hermetic seal using a socket that encloses the part, filling the space inside the socket with epoxy resin, the socket and the deflection A plate that transmits the tension of the cable to the deflection unit via an adhesive force between the epoxy resin and a portion having a predetermined length from which the covering material has been removed, and the socket, the deflection unit, A structure having a cable protection structure fixed to a cable .

第16の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルを保護する構造を備えた構造体であって、前記偏向部における偏向管の内管経路のうち少なくとも当該内管内における、ケーブルと内管との圧接区間たる腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管の内管内を挿通し、前記偏向管の内管にエポキシ樹脂の充填を行うに先立ち、前記内管の端部開口と前記ケーブル外周との間を止水処理し、前記内管において前記止水処理の位置よりも偏向部内方側に設けた注入口に対し、エポキシ樹脂の充填を行って前記内管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなるケーブル保護構造を備えたことを特徴とする。 A sixteenth invention is a structure having a structure that protects the cable for inserting the deflecting portion of the saddle structure in bridges, within at least the inner tube of the inner tube path of the deflected tube in the deflection unit, the cable the press contact sections serving abdomen to remove pressure acting section sites corresponding to dressing cable with bets inner tube, inserted through inside the inner tube of the deflection tube, prior to performing the filling of epoxy resin into the inner tube of the deflection tube, A water stop treatment is performed between the end opening of the inner pipe and the outer periphery of the cable, and an epoxy resin is filled in the inlet provided on the inner side of the deflection section with respect to the water stop treatment position in the inner pipe. And a cable protection structure in which the inner pipe is filled with an epoxy resin and at least a portion of the cable from which the covering material has been removed is covered with the epoxy resin .

第17の発明は、橋梁におけるサドル構造の偏向部を挿通するケーブルの固定装置であって、前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、被覆材を除去した前記偏向部表面から所定長の部位を、内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットと、前記所定長の部位を内包した前記ソケット内空にエポキシ樹脂が充填された充填部と、前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートと、を備えることを特徴とする。 A seventeenth aspect of the invention is a cable fixing device for inserting a deflection portion of a saddle structure in a bridge, wherein the deflection member is removed from a cable that is inserted through a deflection pipe in the deflection portion and protrudes from the surface of the deflection portion. A socket having an inner space capable of enclosing a portion of a predetermined length from the surface of the part and enclosing the portion under a predetermined sealing property, and an inner space of the socket including the predetermined length portion are filled with epoxy resin. The tension of the cable is transmitted to the deflecting portion through an adhesive force between the epoxy resin and the portion having a predetermined length between the filling portion, the socket, and the surface of the deflecting portion from which the covering material is removed. And a plate.

その他、本願が開示する課題、及びその解決方法は、発明の実施の形態の欄、及び図面により明らかにされる。   In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the embodiments of the present invention and the drawings.

本発明によれば、橋梁における偏向部を貫通するケーブルの保護を可能とし、また、このケーブルについて良好な固定性能を簡便かつ効率的に発現可能とできる。   ADVANTAGE OF THE INVENTION According to this invention, the protection of the cable which penetrates the deflection | deviation part in a bridge is attained, and favorable fixing performance can be expressed easily and efficiently about this cable.

以下に本発明の実施形態について図面を用いて詳細に説明する。図1は本実施形態を適用可能な橋梁例の概要構造を示す図であり、(a)斜張・エキストラドーズド橋、(b)トラス橋、(c)箱桁橋、(d)桁橋の各側面図である。本実施形態におけるケーブル保護方法は橋梁の種別を選ばず適用可能であるが、ケーブル固定装置は、偏向部の左右でケーブル張力に差が数%(例:4%)以内であるトラス橋に適用することが想定できる。しかしながら、このような実施形態に本発明の適用範囲が限定されることはなく、斜張橋あるいはエキストラドーズド橋、または箱桁橋、桁橋など他の種々の橋梁であっても、例えばケーブル固定装置のソケット内空におけるケーブルとエポキシ樹脂との付着長を調整し、各橋梁における偏向部左右でのケーブル張力差に対応するとすれば、いずれの橋梁であっても適用可能である。   Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a schematic structure of an example of a bridge to which this embodiment can be applied. (A) Cable-stayed extradosed bridge, (b) Truss bridge, (c) Box girder bridge, (d) Girder bridge FIG. Although the cable protection method in this embodiment can be applied regardless of the type of bridge, the cable fixing device is applied to a truss bridge whose difference in cable tension is within several percent (eg, 4%) on the left and right of the deflecting portion. Can be assumed. However, the scope of application of the present invention is not limited to such an embodiment. For example, a cable can be used for a cable stayed bridge, an extradosed bridge, a box girder bridge, a girder bridge, and other various bridges. Any bridge can be applied if the adhesion length between the cable and the epoxy resin in the socket inside the fixing device is adjusted to correspond to the cable tension difference between the right and left deflection portions of each bridge.

次に、このような橋梁に本発明を適用する手順について説明する。図2は本実施形態のケーブル保護方法例1における手順(a)〜(c)を示す図である。例えば、斜張橋あるいはエキストラドーズド橋の中間支持柱(塔)頂部、或いはトラス橋又は箱桁橋の中間支点上の柱頭上辺部を偏向部1として、まず、そのコンクリート中に所定の曲率を備えた偏向管2を設置する(図2(a))。更にこの偏向管2の内空には内管20を貫通させるものとする(図2(b))。なお、この内管20には、エポキシ樹脂の充填を行うための注入口21と排出口22とが設けられている。この排出口22は、エポキシ樹脂の充填に伴う内管20内やケーブル内の既存物(空気等)の排出を許容するとともに、当該排出口22からのエポキシ樹脂の横溢をもって充填完了を示す役割を担う。   Next, a procedure for applying the present invention to such a bridge will be described. FIG. 2 is a diagram showing procedures (a) to (c) in the cable protection method example 1 of the present embodiment. For example, the top of the intermediate support column (tower) of the cable stayed bridge or extradosed bridge, or the upper side of the column head on the intermediate fulcrum of the truss bridge or box girder bridge is used as the deflecting section 1, and a predetermined curvature is first given in the concrete. The provided deflection tube 2 is installed (FIG. 2A). Further, it is assumed that the inner tube 20 penetrates the inner space of the deflection tube 2 (FIG. 2B). The inner pipe 20 is provided with an inlet 21 and an outlet 22 for filling with an epoxy resin. The discharge port 22 has a function of permitting the discharge of the existing material (air, etc.) in the inner tube 20 and the cable accompanying the filling of the epoxy resin, and indicating the completion of filling with the overflow of the epoxy resin from the discharge port 22. Bear.

また、前記注入口21は、ケーブル3における後述する止水処理の位置よりも偏向部1の内方側の内管20に設ける。また、排出口22は、前記内管20において前記注入21口とは偏向部1を挟んだ対向位置にあって前記止水処理の位置よりも偏向部1の内方側に設ける。   The injection port 21 is provided in the inner tube 20 on the inner side of the deflection unit 1 with respect to the position of water stop processing described later in the cable 3. Further, the discharge port 22 is provided in the inner tube 20 at a position opposite to the injection port 21 with the deflection unit 1 in between, and is provided on the inner side of the deflection unit 1 with respect to the water stop treatment position.

次に、このような内管20に対し、保護すべきケーブル3を挿通することになる(図2(c))。このケーブル3は、前記偏向部1における偏向管2内の経路のうち少なくとも当該偏向管2内における腹圧作用区間にあたる部位30の被覆材を除去したものとなっている。前記腹圧作用区間では、ケーブル3に作用する、偏向管2の開口端23より外方向への張力が、内管20における腹圧方向へ作用することとなり、ケーブル3と内管20との間が圧接されることとなる。つまり、腹圧作用とは、ケーブル3と内管20との圧接区間を意味するNext, the cable 3 to be protected is inserted into such an inner tube 20 (FIG. 2C). The cable 3 is obtained by removing at least the covering material of the portion 30 corresponding to the abdominal pressure acting section in the deflection tube 2 in the deflection tube 2 in the deflection section 1. In the abdominal pressure acting section, the tension that acts on the cable 3 outward from the opening end 23 of the deflection tube 2 acts in the abdominal pressure direction in the inner tube 20, and between the cable 3 and the inner tube 20. Will be pressed. That is, the abdominal pressure action means a pressure contact section between the cable 3 and the inner tube 20 .

なお、前記ケーブル3は、図6に示す通り、プレファブ型ケーブルとすることができる。このプレファブ型ケーブルは、複数本の亜鉛メッキPC鋼より線50を束ねた束線4を充填材51(或いは成形材)で巻回あるいは充填し、その外側を被覆材たる高密度ポリエチレン52(HDPE)で断面外周が円形となるように被覆一体化したケーブルである。   The cable 3 can be a prefabricated cable as shown in FIG. This prefabricated cable is formed by winding or filling a bundle 4 in which a plurality of galvanized PC steel wires 50 are bundled with a filler 51 (or a molding material) and covering the outside with a high-density polyethylene 52 (HDPE) as a coating material. ) In which the outer periphery of the cross-section is circular and integrated.

また、前記ケーブル3は、少なくとも前記腹圧作用区間にあたる部位30よりも偏向部
1の外方の部位について、少なくともその内部に止水処理を施してあるケーブルである。当該止水処理の例として、例えば被覆材52より内側で束線4を構成する、より線50間の空隙と、より線50と被覆材52との空隙に止水材を充填する処理を想定できる。これにより、ケーブル3が挿通された内管20に対してエポキシ樹脂の充填を行う際に、前記止水処理を施した区間以外のケーブル3にエポキシ樹脂が流出することを抑止する。
In addition, the cable 3 is a cable in which at least a portion outside the deflecting portion 1 is located at a position outside the deflecting portion 1 relative to the portion 30 corresponding to the abdominal pressure acting section. As an example of the water-stopping treatment, for example, a process in which the water-stopping material is filled in the gap between the stranded wires 50 and the gap between the stranded wire 50 and the covering material 52 that configure the bundled wire 4 inside the covering material 52 is assumed. it can. Thereby, when filling with the epoxy resin with respect to the inner pipe | tube 20 with which the cable 3 was penetrated, it suppresses that an epoxy resin flows out into the cables 3 other than the area which performed the said water stop process.

図3は本実施形態のケーブル保護方法および固定方法の例1における手順(d)〜(f)を示す図である。内管20にケーブル3を挿通したならば、続いて、前記偏向管2の内管20にエポキシ樹脂の充填を行うに先立ち、前記内管20の端部開口24と前記ケーブル外周31との間を止水処理する。この止水処理は、例えば、前記内管20の端部開口24と前記ケーブル外周31との間を熱収縮チューブで水密に固定することで行う。   FIG. 3 is a diagram showing procedures (d) to (f) in Example 1 of the cable protection method and the fixing method of the present embodiment. If the cable 3 is inserted into the inner tube 20, then, before filling the inner tube 20 of the deflection tube 2 with the epoxy resin, the gap between the end opening 24 of the inner tube 20 and the outer periphery 31 of the cable is determined. Water treatment. This water stop treatment is performed by, for example, fixing the space between the end opening 24 of the inner tube 20 and the cable outer periphery 31 with a heat-shrinkable tube.

この固定を実行した後、ケーブル3における前記注入口21および排出口22との取り合いを図ってエポキシ樹脂の注入金具25を内管20に取り付ける。この注入金具25には、例えば前記注入口21および排出口22に連結する管体が備えられて、当該注入金具25表面よりこの管体を突出させるものが想定できる。したがって、この管体よりエポキシ樹脂7の充填が実行される(図3(d))。このエポキシ樹脂7の充填により、例えば前記内管20における腹圧作用区間にエポキシ樹脂7が満たされ、前記ケーブル3のうち少なくとも前記被覆材52が除去された部位をエポキシ樹脂7により被覆することとなる。   After this fixing is performed, an epoxy resin injection fitting 25 is attached to the inner tube 20 so as to engage with the inlet 21 and the outlet 22 in the cable 3. The injection fitting 25 is provided with, for example, a tube connected to the injection port 21 and the discharge port 22 and can be assumed to protrude from the surface of the injection fitting 25. Therefore, the epoxy resin 7 is filled from the tube (FIG. 3D). By filling the epoxy resin 7, for example, the abdominal pressure acting section in the inner pipe 20 is filled with the epoxy resin 7, and at least a portion of the cable 3 from which the covering material 52 is removed is covered with the epoxy resin 7. Become.

こうしてケーブル保護がなされたケーブル3は、次に適宜な固定措置をとられることとなる。そのため、前記偏向部1における偏向管1内の内管20を挿通し偏向部表面から突出したケーブル3のうち、前記偏向部表面から所定長の部位L(例えば前記ケーブル外周31より外方へ所定長)の被覆材52を除去する。この除去処理は予め工場等で行っておいてもよいし、ケーブル施工の現場で行うものとしてもよい。   The cable 3 thus protected by the cable is then subjected to appropriate fixing measures. Therefore, among the cables 3 that pass through the inner tube 20 in the deflection tube 1 in the deflection unit 1 and protrude from the surface of the deflection unit, a predetermined length L from the deflection unit surface (for example, predetermined outward from the cable outer periphery 31). The long covering material 52 is removed. This removal processing may be performed in advance at a factory or the like, or may be performed at the site of cable construction.

次に、前記被覆材52が除去された所定長の部位Lを内包可能な内空を有し所定の密閉性のもと前記部位Lを内包するソケット6を用いて、前記所定長の部位Lを内包し当該ソケット6の内空にエポキシ樹脂7を充填する(図3(e))。   Next, the portion L of the predetermined length is used by using a socket 6 having an inner space that can include the portion L of the predetermined length from which the covering material 52 has been removed and that includes the portion L under a predetermined sealing property. And the epoxy resin 7 is filled in the inner space of the socket 6 (FIG. 3E).

また、前記ソケット6と前記偏向部表面との間にあって、前記被覆材52を除去した所定長の部位Lと前記エポキシ樹脂7との間における付着力を介して前記偏向部1に前記ケーブル3の張力を伝達するテーパープレート5(プレート)を、前記ソケット6と前記偏向部1とに固定する(図3(f))。このテーパープレート5(図4(a)参照)と偏向部1との固定は、例えばボルト固定が採用できる。また、テーパープレート5とソケット6との固定も同様に、例えば、ボルト70をテーパープレート5のフランジ部位に挿通してナット71(図4(b)参照)にて締結することで行うことが出来る。   Further, the cable 3 is connected to the deflecting unit 1 through an adhesive force between the socket 6 and the surface of the deflecting unit and having a predetermined length L from which the covering material 52 is removed and the epoxy resin 7. A taper plate 5 (plate) for transmitting tension is fixed to the socket 6 and the deflecting unit 1 (FIG. 3 (f)). The taper plate 5 (see FIG. 4A) and the deflection unit 1 can be fixed by, for example, bolt fixing. Similarly, the taper plate 5 and the socket 6 can be fixed by, for example, inserting a bolt 70 through a flange portion of the taper plate 5 and fastening with a nut 71 (see FIG. 4B). .

こうした形成したケーブル3の固定構造については図7に示す通りである。前記のソケット6は、その側断面において対向する内空表面63が略平行である形状を備えると共に、ケーブル長さ方向に分割(例:締結具65を互いに備えた2分割片64から構成する構造)あるいは開口が可能な構造(例:蝶番を可撓部に配置した半割れ構造)と、エポキシ樹脂7の注入口61および排出口62とを備えるものである。この注入口61は、例えばソケット6の下部で偏向部1から遠い側に設け、排出口62は、ソケット6の上部で偏向部1に近い側に設けることとする。   The structure for fixing the formed cable 3 is as shown in FIG. The socket 6 has a shape in which the inner air surfaces 63 facing each other in a side cross section thereof are substantially parallel and divided in the cable length direction (for example, a structure constituted by two divided pieces 64 each provided with a fastener 65. ) Or a structure capable of opening (for example, a half-cracked structure in which a hinge is arranged in a flexible part), and an inlet 61 and an outlet 62 of the epoxy resin 7. For example, the inlet 61 is provided on the side far from the deflecting unit 1 at the bottom of the socket 6, and the outlet 62 is provided on the side near the deflecting unit 1 at the top of the socket 6.

前記ソケット6内に対するエポキシ樹脂7の充填は、前記注入口61から行い、排出口62から該エポキシ樹脂7が排出されるのを確認して充填を完了するものとする。また、エポキシ樹脂7の硬化を促進するべくソケット6の温度を高めるために、温風を当てるとすれば好適である。   It is assumed that the filling of the epoxy resin 7 into the socket 6 is performed from the inlet 61, and the filling is completed after confirming that the epoxy resin 7 is discharged from the outlet 62. In order to increase the temperature of the socket 6 in order to promote the curing of the epoxy resin 7, it is preferable to apply hot air.

このような構造により、偏向部1の左右でケーブル3の緊張力が異なることで生じるケーブル3の不均等張力は、エポキシ樹脂7の付着を介して、まずソケット6に伝わることとなる。そしてこの力は、テーパプレート5により、偏向部1の表面へ支圧として伝えられる。なお、このテーパプレート5は、該ソケット6の端面及び偏向部1の表面との間の角度を調整可能であり、その端面中央部付近にケーブル3が遊挿する穴を有した鋼製の板材となっている(図4(a)参照)。   With such a structure, the non-uniform tension of the cable 3 caused by the difference in tension of the cable 3 on the left and right of the deflecting unit 1 is first transmitted to the socket 6 through the adhesion of the epoxy resin 7. This force is transmitted as a bearing pressure to the surface of the deflection unit 1 by the taper plate 5. In addition, this taper plate 5 can adjust the angle between the end surface of the socket 6 and the surface of the deflecting portion 1, and is a steel plate material having a hole into which the cable 3 is loosely inserted in the vicinity of the center portion of the end surface. (See FIG. 4A).

なお、前記ケーブル3は、偏向部1の内管20を挿通して、例えば橋梁の桁材に設置した適宜な定着具においてジャッキ等を用いて両引きで緊張し定着されるとする。ソケット6の内空において所定長さで付着長をなす部位Lについては、例えば予めケーブル工場等において被覆材52を剥がしておくか、現場においてケーブル3が緊張され、伸び終わって位置が確定してから剥がすかのどちらかとすることができる。   The cable 3 is inserted through the inner tube 20 of the deflecting unit 1 and is fixed by being tensioned by double pulling using a jack or the like, for example, in an appropriate fixing tool installed on a bridge beam. For the part L having a predetermined length in the inner space of the socket 6, for example, the covering material 52 is peeled off in advance at a cable factory or the cable 3 is tensioned at the site and the position is fixed after the extension is finished. Can be either peeled off.

また、ケーブル3の被覆材52はソケット6の両端から若干の長さ分だけ入り込んだ状態にする。該被覆材52とソケット6との隙間から充填されるエポキシ樹脂7が漏れないように、例えば二分割されたソケット6が、その片端面がテーパープレート5に当接するように設置された時、その両端出口穴が該被覆材52を強く押さえるように穴径をケーブル3の被覆材52の外形より若干小さくしておく。   Further, the covering material 52 of the cable 3 is made to enter from the both ends of the socket 6 by a slight length. To prevent the epoxy resin 7 filled from the gap between the covering material 52 and the socket 6 from leaking, for example, when the socket 6 divided into two is installed so that one end surface thereof is in contact with the taper plate 5, The hole diameter is made slightly smaller than the outer shape of the covering material 52 of the cable 3 so that the outlet holes at both ends strongly press the covering material 52.

また、このように二分割した場合のソケット6の外側には、分割面に沿ってフランジ66を取付け、そのフランジ66の内面にはゴムパッキンを貼設しておく。つまり、フランジ66同士を当接しボルト65により締結するとすれば、前記ゴムパッキンが圧接されて止水性が確保されることとなる。 Further, a flange 66 is attached to the outer side of the socket 6 in the case of being divided in this way along the split surface, and a rubber packing is stuck on the inner surface of the flange 66. That is, if the flanges 66 are brought into contact with each other and fastened by the bolt 65, the rubber packing is brought into pressure contact to ensure water stoppage.

更に、充填される該エポキシ樹脂7の漏出防止のために、前記ソケット6の設置前に、その両端口の内側でふたをするように、Oリング状で内径が前記被覆材52より適宜小さいゴム製グラウト止め10を取り付けておくと好適である。また、内管20とテーパープレート5との外交線、及びソケット6とケーブル3の被覆材52との外交線には全周にわたってシリコン系の止水剤9を付けるとより止水性が高まる。   Further, in order to prevent leakage of the filled epoxy resin 7, before installation of the socket 6, a rubber having an O-ring shape and an inner diameter that is appropriately smaller than the covering material 52 so as to cover the inside of both ends. It is preferable to attach the grout stopper 10 made in advance. In addition, when the silicone water-stopping agent 9 is attached to the diplomatic line between the inner tube 20 and the taper plate 5 and the diplomatic line between the socket 6 and the covering material 52 of the cable 3, the water-stopping property is further increased.

また、前記偏向管2および前記テーパプレート5を前記ソケット6がもともと一体に備えるとし、ソケット6の設置すなわち、テーパプレート5の偏向部1への固定という形態を採用することもできる。このように、前記偏向管2、前記テーパプレート5、および前記ソケット6を一体とする手段については後述する。   Further, it is also possible to adopt a configuration in which the deflection tube 2 and the taper plate 5 are originally provided integrally with the socket 6 and the socket 6 is installed, that is, the taper plate 5 is fixed to the deflection unit 1. Thus, means for integrating the deflection tube 2, the taper plate 5, and the socket 6 will be described later.

更に、偏向管2の両端部はそこに挿通する内管20やケーブル3が当接し引っかかるなどして高密度ポリエチレン(HDPE)被覆が損傷しないようにラッパ状の拡径部28を設けておく。また、偏向部1のコンクリート壁面を形成するための型枠を、施工が最も容易な鉛直に組み付けられるよう、前記拡径する部位の延長を偏向部表面の手前で止めおくものとする。そのため、例えば転用可能なゴム製の半球状フォーマーを用いて偏向部表面の出口29を形成する。   Further, a trumpet-shaped enlarged diameter portion 28 is provided at both ends of the deflection tube 2 so that the inner tube 20 and the cable 3 inserted therethrough are brought into contact with and caught by the cable 3 so that the high density polyethylene (HDPE) coating is not damaged. Further, the extension of the diameter-expanding portion is stopped before the surface of the deflecting portion so that the formwork for forming the concrete wall surface of the deflecting portion 1 can be assembled vertically in the easiest manner. Therefore, for example, the outlet 29 on the surface of the deflecting portion is formed by using a divertable rubber hemispherical former.

次に、他の実施形態について説明する。図8は本実施形態のケーブル保護方法および固定方法の例2における手順(a)、(b)を示す図であり、図9は本実施形態のケーブル保護方法および固定方法の例2における手順(c)、(d)を示す図でああり、図10は本実施形態のケーブル保護方法例2における手順(e)、(f)を示す図である。偏向部1の偏向管2に内管20を挿通する(図8(a))。更に、この内管20に前記テーパープレート5を挿通させ、当該テーパープレート5を偏向部1の表面に固定する(固定方法については上記実施形態と同様である)。また、内管20の端部にはキャップ固定リング81(図5(b)参照)を取り付ける(図8(b))。   Next, another embodiment will be described. FIG. 8 is a diagram showing the procedures (a) and (b) in the cable protection method and the fixing method example 2 of the present embodiment, and FIG. 9 is the procedure in the cable protection method and the fixing method example 2 of the present embodiment ( FIG. 10 is a diagram illustrating steps (e) and (f) in the cable protection method example 2 of the present embodiment. The inner tube 20 is inserted through the deflection tube 2 of the deflection unit 1 (FIG. 8A). Further, the taper plate 5 is inserted into the inner tube 20 and the taper plate 5 is fixed to the surface of the deflecting unit 1 (the fixing method is the same as in the above embodiment). A cap fixing ring 81 (see FIG. 5B) is attached to the end of the inner tube 20 (FIG. 8B).

なお、このテーパープレート5にはテーパープレート5外方と、前記内管20内とをつなぐ挿通孔82が設けられている。したがって、テーパープレート5を偏向部1の表面に固定するに際し、前記挿通孔82に排気ホース80を通すものとする。排気ホース80は、前記実施形態における排出口22と同様に、エポキシ樹脂7の充填に伴う内管20内やケーブル内の既存物(空気等)の排出を許容するとともに、排出ホース80からのエポキシ樹脂7の横溢をもって充填完了を示す役割を担うことができる。また、前記排気ホース80のテーパープレート5より外方の出口は、内管20における曲率点付近の当該排気ホース80の他端出口よりも垂直方向で上方に配置して、空気など当該排気ホース80内の流通物の滞留を防止するものとする。   The taper plate 5 is provided with an insertion hole 82 that connects the outside of the taper plate 5 and the inside of the inner tube 20. Therefore, when the taper plate 5 is fixed to the surface of the deflecting unit 1, the exhaust hose 80 is passed through the insertion hole 82. The exhaust hose 80 permits the discharge of existing materials (such as air) in the inner tube 20 and the cable accompanying the filling of the epoxy resin 7 as well as the discharge port 22 in the above embodiment, and the epoxy from the discharge hose 80. It can play the role of indicating the completion of filling with the overflow of the resin 7. Further, the outlet of the exhaust hose 80 outward from the taper plate 5 is disposed vertically above the other end outlet of the exhaust hose 80 in the vicinity of the curvature point of the inner pipe 20 so that the exhaust hose 80 such as air is exhausted. It shall prevent the stagnation of the circulation.

続いて、内管20にケーブル3を挿入するに際し、キャップ83を先通しする(図9(c))。またケーブル3は、上述の実施形態と同様に、前記偏向部1における偏向管2内の経路のうち少なくとも当該偏向管2内における腹圧作用区間にあたる部位30の被覆材52を除去したものとなっている。前記腹圧作用区間では、ケーブル3に作用する前記開口端23より外方向への張力が、内管20における腹圧方向へ作用することとなり、ケーブル3と内管20との間が圧接されることとなる。つまり、腹圧作用区間とは、ケーブル3と内管20との圧接区間を意味するSubsequently, when the cable 3 is inserted into the inner tube 20, the cap 83 is passed through first (FIG. 9C). Similarly to the above-described embodiment, the cable 3 is obtained by removing the covering material 52 of the portion 30 corresponding to the abdominal pressure acting section in the deflection tube 2 out of the paths in the deflection tube 2 in the deflection unit 1. ing. In the abdominal pressure acting section, the outward tension from the opening end 23 acting on the cable 3 acts in the abdominal pressure direction in the inner tube 20, and the cable 3 and the inner tube 20 are pressed against each other. It will be. That is, the abdominal pressure action section means a pressure contact section between the cable 3 and the inner tube 20 .

また、図6に則して上述したように、当該ケーブル3は、プレファブ型ケーブルとすることができる。そして、少なくとも前記腹圧作用区間にあたる部位30よりも偏向部
1の外方の部位について、少なくともその内部に止水処理を施してあるものとする。当該止水処理の例として、例えば被覆材52より内側で束線4を構成する、より線50間の空隙に止水材を充填する処理を想定できる。これにより、ケーブル3が挿通された内管20に対してエポキシ樹脂7の充填を行う際に、前記止水処理を施した区間以外のケーブル3にエポキシ樹脂7が流出することを抑止する。
Further, as described above with reference to FIG. 6, the cable 3 can be a prefabricated cable. It is assumed that at least the inside of the deflecting unit 1 outside the part 30 corresponding to the abdominal pressure acting section is subjected to a water stop treatment. As an example of the water-stopping process, for example, a process of filling the water-stopping material into the space between the strands 50 that configures the bundle wire 4 inside the covering material 52 can be assumed. Thereby, when filling with the epoxy resin 7 with respect to the inner tube | pipe 20 with which the cable 3 was penetrated, it suppresses that the epoxy resin 7 flows out into the cables 3 other than the area which performed the said water stop process.

内管20にケーブルを挿通したならば、エポキシ樹脂注入用のホースニップル84を内管20に取り付ける。このホースニップル84は、上述したエポキシ樹脂7の注入金具25と同様の機能を備えるものとする。したがって、例えば前記注入口21および排出口22に連結する管体が備えられており、ホースニップル84の表面よりこの管体を突出させるものが想定できる。したがって、この管体よりエポキシ樹脂7の充填が実行される。 When the cable 3 is inserted into the inner tube 20, a hose nipple 84 for injecting epoxy resin is attached to the inner tube 20. The hose nipple 84 is assumed to have the same function as that of the injection fitting 25 of the epoxy resin 7 described above. Therefore, for example, a tube connected to the injection port 21 and the discharge port 22 is provided, and a tube that protrudes from the surface of the hose nipple 84 can be assumed. Therefore, the epoxy resin 7 is filled from this tube.

前記ホースニップル84を取り付けた後、当該ホースニップル84に当接するまでスペーサー85(図5(c)参照)を押し込んで固定し、前記キャップ83を前記キャップ固定リング81に固定する(図9(d))。固定方法としては、互いにボルトを挿通しボルトで締結する手法が採用できる。   After attaching the hose nipple 84, the spacer 85 (see FIG. 5C) is pushed in and fixed until it abuts against the hose nipple 84, and the cap 83 is fixed to the cap fixing ring 81 (FIG. 9D). )). As a fixing method, a method of inserting bolts and fastening them with bolts can be employed.

続いて、キャップ83とケーブル3との間を適宜な樹脂材で封じ、更に、スペーサー85とキャップ83との間に発泡ウレタン90を注入する(図10(e))。当該注入の処理には注入用のパイプを前記スペーサー85とキャップ83との間に挿入して行うものとする。なお、本実施形態において、内管20は鋼製であり、その両端外側にねじを切っておく。そして、ここで切られたねじにナット71を螺着させて締結し、ケーブル固定装置とする。 Subsequently, the gap between the cap 83 and the cable 3 is sealed with an appropriate resin material, and the urethane foam 90 is injected between the spacer 85 and the cap 83 (FIG. 10E). The injection process is performed by inserting an injection pipe between the spacer 85 and the cap 83. In the present embodiment, the inner tube 20 is made of steel, and screws are cut outside both ends thereof. Then, the nut 71 is screwed onto the screw cut here and fastened to obtain a cable fixing device.

また、前記ホースニップル84に適宜な管体を継いで、当該管体よりエポキシ樹脂7を注入する。このエポキシ樹脂7の充填により、例えば前記内管20における腹圧作用区間にエポキシ樹脂7が満たされ、前記ケーブル3のうち少なくとも前記被覆材52が除去された部位をエポキシ樹脂7により被覆することとなる。   Further, an appropriate tube is connected to the hose nipple 84, and the epoxy resin 7 is injected from the tube. By filling the epoxy resin 7, for example, the abdominal pressure acting section in the inner pipe 20 is filled with the epoxy resin 7, and at least a portion of the cable 3 from which the covering material 52 is removed is covered with the epoxy resin 7. Become.

エポキシ樹脂7の充填処理は、エポキシ樹脂7の充填に伴う内管20内やケーブル内の既存物(空気等)が排出され、排気ホース80からのエポキシ樹脂7の横溢をもって完了となる(図10(f))。   The filling process of the epoxy resin 7 is completed when the existing material (air or the like) in the inner tube 20 or the cable accompanying the filling of the epoxy resin 7 is discharged and the epoxy resin 7 overflows from the exhaust hose 80 (FIG. 10). (F)).

更に、上記の実施形態とは別に、前記偏向部1における前記偏向管2が一重管である場合も想定できる。図11にその実施形態におけるケーブル保護方法および固定方法の例3における手順(a)〜(d)を示す図である。本実施形態では、一重管に挿通されたケーブル3のうち前記偏向管2内における腹圧作用区間にあたり被覆材52を除去した部位130に対応して、当該一重管内へのエポキシ樹脂7の充填を行って、前記ケーブル3のうち少なくとも前記被覆材52が除去された部位130をエポキシ樹脂7により被覆することとする。なお、腹圧作用区間だけでなく、偏向管2における全区間にわたって被覆材52を除去した前記ケーブル3を偏向管2に挿通し、この偏向管2内にエポキシ樹脂7を充填するとしてもよい。   Further, separately from the above-described embodiment, it can be assumed that the deflection tube 2 in the deflection unit 1 is a single tube. FIG. 11 is a diagram illustrating procedures (a) to (d) in Example 3 of the cable protection method and the fixing method in the embodiment. In the present embodiment, in the cable 3 inserted through the single pipe, the epoxy resin 7 is filled into the single pipe corresponding to the portion 130 where the covering material 52 is removed in the abdominal pressure acting section in the deflection pipe 2. Then, at least a portion 130 of the cable 3 from which the covering material 52 has been removed is covered with the epoxy resin 7. Note that the cable 3 from which the covering material 52 is removed not only in the abdominal pressure acting section but also in the entire section of the deflection pipe 2 may be inserted into the deflection pipe 2 and filled with the epoxy resin 7.

実施手順としては、まず例えば、桁橋の偏向部1中に所定の曲率を備えた偏向管2を設置する(図11(a))。本実施形態においては、前記曲率を、前記被覆材52の耐摩耗性を越える腹圧を生じる曲率以上で、前記エポキシ樹脂7の耐摩耗性を越えない腹圧を生じる曲率以下であるものとする。つまり、従来の被覆材を用いることは避けるべきとされるような曲率の大きな偏向管2であっても、エポキシ樹脂7を用いた本実施形態を採用すれば、そのような大きな曲率の偏向管2であっても対応できるのである。   As an implementation procedure, first, for example, the deflection pipe 2 having a predetermined curvature is installed in the deflection section 1 of the girder bridge (FIG. 11A). In the present embodiment, the curvature is equal to or more than the curvature that generates the abdominal pressure exceeding the wear resistance of the covering material 52 and is equal to or less than the curvature that generates the abdominal pressure not exceeding the wear resistance of the epoxy resin 7. . That is, even if the deflecting tube 2 has a large curvature that should be avoided by using a conventional coating material, if the present embodiment using the epoxy resin 7 is adopted, the deflecting tube having such a large curvature is used. Even 2 can cope.

次に、前記の偏向管2には、ケーブル3を挿通する(図11(b))。なお、前記偏向管2には、エポキシ樹脂の充填を行うための注入口121と排出口122とが設けられている。この排出口122は、エポキシ樹脂の充填に伴う偏向管2内やケーブル内の既存物(空気等)の排出を許容するとともに、当該排出口122からのエポキシ樹脂の横溢をもって充填完了を示す役割を担う。また、前記注入口121は、ケーブル3における後述する止水処理の位置よりも偏向部1の内方側に設け、その開口端は偏向部1の表面に突出させる。また、排出口122は、前記偏向管2における曲率点C付近に設ける。   Next, the cable 3 is inserted through the deflection tube 2 (FIG. 11B). The deflection tube 2 is provided with an inlet 121 and an outlet 122 for filling with epoxy resin. The discharge port 122 allows the discharge of the existing material (air, etc.) in the deflection tube 2 and the cable accompanying the filling of the epoxy resin, and also indicates the completion of filling with the overflow of the epoxy resin from the discharge port 122. Bear. The injection port 121 is provided on the inner side of the deflecting unit 1 with respect to the position of water stop processing (described later) in the cable 3, and the opening end thereof projects from the surface of the deflecting unit 1. Further, the discharge port 122 is provided in the vicinity of the curvature point C in the deflection tube 2.

また、前記偏向管1に挿通するケーブル3は、前記偏向部1における偏向管2内の経路のうち少なくとも当該偏向管2内における腹圧作用区間にあたる部位130の被覆材を除去したものとなっている。前記腹圧作用区間では、ケーブル3に作用する前記開口端23より外方向への張力が、偏向管2における腹圧方向へ作用することとなり、ケーブル3と偏向管2との間が圧接されることとなる。つまり、腹圧作用区間とは、ケーブル3と偏向管2との圧接区間を意味するThe cable 3 inserted into the deflection tube 1 is obtained by removing the covering material of at least the portion 130 corresponding to the abdominal pressure acting section in the deflection tube 2 in the deflection tube 2 in the deflection unit 1. Yes. In the abdominal pressure acting section, the tension outward from the opening end 23 acting on the cable 3 acts in the abdominal pressure direction of the deflection tube 2, and the cable 3 and the deflection tube 2 are pressed against each other. It will be. That is, the abdominal pressure action section means a pressure contact section between the cable 3 and the deflection tube 2 .

また、前記ケーブル3は、図6に既に示した通り、プレファブ型ケーブルとすることができる。このプレファブ型ケーブルは、複数本の亜鉛メッキPC鋼より線50を束ねた束線4を充填材51(或いは成形材)で巻回あるいは充填し、その外側を被覆材たる高密度ポリエチレン52(HDPE)で断面外周が円形となるように被覆一体化したケーブルである。   The cable 3 may be a prefabricated cable as already shown in FIG. This prefabricated cable is formed by winding or filling a bundle 4 in which a plurality of galvanized PC steel wires 50 are bundled with a filler 51 (or a molding material) and covering the outside with a high-density polyethylene 52 (HDPE) as a coating material. ) In which the outer periphery of the cross-section is circular and integrated.

また、前記ケーブル3は、少なくとも前記腹圧作用区間にあたる部位130よりも偏向部1の外方の部位について、少なくともその内部に止水処理を施してあるケーブルである。当該止水処理の例として、例えば被覆材52より内側で束線4を構成する、より線50間の空隙と、より線50と被覆材52との空隙に止水材を充填する処理を想定できる。これにより、ケーブル3が挿通された偏向管2に対してエポキシ樹脂7の充填を行う際に、前記止水処理を施した区間以外のケーブル3にエポキシ樹脂が流出することを抑止する。   Further, the cable 3 is a cable in which at least a portion outside the deflecting portion 1 is located at least inside the portion 130 corresponding to the abdominal pressure acting section is water-stopped. As an example of the water-stopping treatment, for example, a process in which the water-stopping material is filled in the gap between the stranded wires 50 and the gap between the stranded wire 50 and the covering material 52 that configure the bundled wire 4 inside the covering material 52 is assumed. it can. Thereby, when filling with the epoxy resin 7 with respect to the deflection pipe 2 in which the cable 3 was penetrated, it suppresses that an epoxy resin flows out into the cables 3 other than the area which performed the said water stop process.

偏向管2にケーブル3を挿通したならば、続いて、前記偏向管2にエポキシ樹脂7の充填を行うに先立ち、前記偏向管2の内面131と、前記ケーブル3の被覆材52を除去した部位端132の外周133との間を止水処理する(図11(c))。この止水処理は、例えば、前記内面131と前記ケーブル外周31との間に間詰め材134の固定を水密に行うことで実行する。或いは、前記ケーブル3が部位端132において偏向管2の内径以上に拡径されて、ケーブル3の偏向管2への挿通によりケーブル3の偏向管2の内面への当接が図られ、即ち前記止水処理が実行されるとしてもよい。いずれにしてもこの止水処理の形態は実行状況等に応じて種々採用してよい。 If the cable 3 is inserted through the deflection tube 2, the inner surface 131 of the deflection tube 2 and the covering material 52 of the cable 3 are removed prior to filling the deflection tube 2 with the epoxy resin 7. A water stop process is performed between the outer periphery 133 of the end 132 (FIG. 11C). This water stop treatment is executed by, for example, watertightly fixing the padding material 134 between the inner surface 131 and the cable outer periphery 31. Alternatively, the diameter of the cable 3 is increased beyond the inner diameter of the deflection tube 2 at the part end 132, and the cable 3 is brought into contact with the inner surface of the deflection tube 2 by insertion of the cable 3 into the deflection tube 2. A water stop process may be performed. In any case, various forms of the water stop treatment may be adopted depending on the execution situation or the like.

この後、前記注入口121からのエポキシ樹脂7が充填され、例えば前記偏向管2における腹圧作用区間にエポキシ樹脂7が満たされ、前記ケーブル3のうち少なくとも前記被覆材52が除去された部位130をエポキシ樹脂7により被覆することとなる。   Thereafter, the epoxy resin 7 from the injection port 121 is filled, for example, an abdominal pressure acting section in the deflection tube 2 is filled with the epoxy resin 7, and at least the covering material 52 of the cable 3 is removed 130. Is coated with the epoxy resin 7.

こうしてケーブル保護がなされたケーブル3は、次に適宜な固定措置をとられることとなる(図11(d))。図12は本実施形態のケーブル保護方法および固定方法の例3におけるケーブル固定構造を示す断面図である。この場合、前記偏向部1における偏向管1を挿通し偏向部表面から突出したケーブル3のうち、前記偏向部表面から所定長の部位L(例えば前記ケーブル外周31より外方へ所定長)の被覆材52を除去する。この除去処理は予め工場等で行っておいてもよいし、ケーブル施工の現場で行うものとしてもよい。   The cable 3 thus protected by the cable is then subjected to appropriate fixing measures (FIG. 11 (d)). FIG. 12 is a cross-sectional view showing a cable fixing structure in Example 3 of the cable protection method and the fixing method of the present embodiment. In this case, of the cable 3 inserted through the deflection tube 1 in the deflection unit 1 and protruding from the surface of the deflection unit, a portion L (for example, a predetermined length outward from the cable outer periphery 31) having a predetermined length from the surface of the deflection unit is covered. The material 52 is removed. This removal processing may be performed in advance at a factory or the like, or may be performed at the site of cable construction.

次に、前記被覆材52が除去された所定長の部位Lを内包可能な内空を有し所定の密閉性のもと前記部位Lを内包するソケット6を用いて、前記所定長の部位Lを内包し当該ソケット6の内空にエポキシ樹脂7を充填する。   Next, the portion L of the predetermined length is used by using a socket 6 having an inner space that can include the portion L of the predetermined length from which the covering material 52 has been removed and that includes the portion L under a predetermined sealing property. And the epoxy resin 7 is filled in the inner space of the socket 6.

また、前記ソケット6と前記偏向部表面との間にあって、前記被覆材52を除去した所定長の部位Lと前記エポキシ樹脂7との間における付着力を介して前記偏向部1に前記ケーブル3の張力を伝達するテーパープレート5(プレート)を、前記ソケット6と前記偏向部1とに固定する。このテーパープレート5(図4(a)参照)と偏向部1との固定は、例えばボルト固定が採用できる。また、テーパープレート5とソケット6との固定も同様に、例えば、ボルト70をテーパープレート5に挿通してナット71(図4(b)参照)にて締結することで行うことが出来る。   Further, the cable 3 is connected to the deflecting unit 1 through an adhesive force between the socket 6 and the surface of the deflecting unit and having a predetermined length L from which the covering material 52 is removed and the epoxy resin 7. A taper plate 5 (plate) that transmits tension is fixed to the socket 6 and the deflecting unit 1. The taper plate 5 (see FIG. 4A) and the deflection unit 1 can be fixed by, for example, bolt fixing. Similarly, the taper plate 5 and the socket 6 can be fixed by, for example, inserting a bolt 70 through the taper plate 5 and fastening with a nut 71 (see FIG. 4B).

こうした形成したケーブル3の固定構造ににおいて、前記のソケット6は、その側断面において対向する内空表面63が略平行である形状を備えると共に、ケーブル長さ方向に分割(例:締結具65を互いに備えた2分割片64から構成する構造)あるいは開口が可能な構造(例:蝶番を可撓部に配置した半割れ構造)と、エポキシ樹脂7の注入口61および排出口62とを備えるものである。この注入口61は、例えばソケット6の下部で偏向部1から遠い側に設け、排出口62は、ソケット6の上部で偏向部1に近い側に設けることとする。   In the fixing structure of the cable 3 thus formed, the socket 6 has a shape in which the inner air surfaces 63 facing each other in a side cross section thereof are substantially parallel, and is divided in the cable length direction (for example, the fastener 65 is provided). A structure comprising two split pieces 64 provided to each other) or a structure capable of opening (for example, a half-crack structure in which a hinge is arranged in a flexible part), and an inlet 61 and an outlet 62 for epoxy resin 7 It is. For example, the inlet 61 is provided on the side far from the deflecting unit 1 at the bottom of the socket 6, and the outlet 62 is provided on the side near the deflecting unit 1 at the top of the socket 6.

前記ソケット6内に対するエポキシ樹脂7の充填は、前記注入口61から行い、排出口62から該エポキシ樹脂7が排出されるのを確認して充填を完了するものとする。また、エポキシ樹脂7の硬化を促進するべくソケット6の温度を高めるために、温風を当てるとすれば好適である。   It is assumed that the filling of the epoxy resin 7 into the socket 6 is performed from the inlet 61, and the filling is completed after confirming that the epoxy resin 7 is discharged from the outlet 62. In order to increase the temperature of the socket 6 in order to promote the curing of the epoxy resin 7, it is preferable to apply hot air.

このような構造により、偏向部1の左右でケーブル3の緊張力が異なることで生じるケーブル3の不均等張力は、エポキシ樹脂7の付着を介して、まずソケット6に伝わることとなる。そしてこの力は、テーパプレート5により、偏向部1の表面へ支圧として伝えられる。なお、このテーパプレート5は、該ソケット6の端面及び偏向部1の表面との間の角度を調整可能であり、その端面中央部付近にケーブル3が遊挿する穴を有した鋼製の板材となっている(図4(a)参照)。   With such a structure, the non-uniform tension of the cable 3 caused by the difference in tension of the cable 3 on the left and right of the deflecting unit 1 is first transmitted to the socket 6 through the adhesion of the epoxy resin 7. This force is transmitted as a bearing pressure to the surface of the deflection unit 1 by the taper plate 5. In addition, this taper plate 5 can adjust the angle between the end surface of the socket 6 and the surface of the deflecting portion 1, and is a steel plate material having a hole into which the cable 3 is loosely inserted in the vicinity of the center portion of the end surface. (See FIG. 4A).

なお、前記ケーブル3は、偏向部1の内管20を挿通して、例えば橋梁の桁材に設置した適宜な定着具においてジャッキ等を用いて両引きで緊張し定着されるとする。ソケット6の内空において所定長さで付着長をなす部位Lについては、例えば予めケーブル工場等において被覆材52を剥がしておくか、現場においてケーブル3が緊張され、伸び終わって位置が確定してから剥がすかのどちらかとすることができる。   The cable 3 is inserted through the inner tube 20 of the deflecting unit 1 and is fixed by being tensioned by double pulling using a jack or the like, for example, in an appropriate fixing tool installed on a bridge beam. For the part L having a predetermined length in the inner space of the socket 6, for example, the covering material 52 is peeled off in advance at a cable factory or the cable 3 is tensioned at the site and the position is fixed after the extension is finished. Can be either peeled off.

また、ケーブル3の被覆材52はソケット6の両端から若干の長さ分だけ入り込んだ状態にする。該被覆材52とソケット6との隙間から充填されるエポキシ樹脂7が漏れないように、例えば二分割されたソケット6が、その片端面がテーパープレート5に当接するように設置された時、その両端出口穴が該被覆材52を強く押さえるように穴径をケーブル3の被覆材52の外形より若干小さくしておく。   Further, the covering material 52 of the cable 3 is made to enter from the both ends of the socket 6 by a slight length. To prevent the epoxy resin 7 filled from the gap between the covering material 52 and the socket 6 from leaking, for example, when the socket 6 divided into two is installed so that one end surface thereof is in contact with the taper plate 5, The hole diameter is made slightly smaller than the outer shape of the covering material 52 of the cable 3 so that the outlet holes at both ends strongly press the covering material 52.

また、このように二分割した場合のソケット6の外側には、分割面に沿ってフランジ66を取付け、そのフランジ66の内面にはゴムパッキンを貼設しておく。つまり、フランジ66同士を当接しボルト65により締結するとすれば、前記ゴムパッキンが圧接されて止水性が確保されることとなる。 Further, a flange 66 is attached to the outer side of the socket 6 in the case of being divided in this way along the split surface, and a rubber packing is stuck on the inner surface of the flange 66. That is, if the flanges 66 are brought into contact with each other and fastened by the bolt 65, the rubber packing is brought into pressure contact to ensure water stoppage.

更に、充填される該エポキシ樹脂7の漏出防止のために、前記ソケット6の設置前に、その両端口の内側でふたをするように、Oリング状で内径が前記被覆材52より適宜小さいゴム製グラウト止め10を取り付けておくと好適である。また、内管20とテーパープレート5との外交線、及びソケット6とケーブル3の被覆材52との外交線には全周にわたってシリコン系の止水剤9を付けるとより止水性が高まる。   Further, in order to prevent leakage of the filled epoxy resin 7, before installation of the socket 6, a rubber having an O-ring shape and an inner diameter that is appropriately smaller than the covering material 52 so as to cover the inside of both ends. It is preferable to attach the grout stopper 10 made in advance. In addition, when the silicone water-stopping agent 9 is attached to the diplomatic line between the inner tube 20 and the taper plate 5 and the diplomatic line between the socket 6 and the covering material 52 of the cable 3, the water-stopping property is further increased.

また、前記偏向管2および前記テーパプレート5を前記ソケット6がもともと一体に備えるとし、ソケット6の設置すなわち、テーパプレート5の偏向部1への固定という形態を採用することもできる。このように、前記偏向管2、前記テーパプレート5、および前記ソケット6を一体とする際には、例えば、図13に示す通り、ボルト100およびナット101を用いる。偏向管2に設けたフランジ110およびソケット端部のフランジ105とテーパープレート5とを前記ボルト100で挿通しナット101で締結固定する。こうした固定措置により、ケーブル3に例えば右方向へ不均等張力が作用すると、樹脂の付着作用によりソケット6は、ボルト100およびナット101により偏向管2に固定され、偏向部1から離れることがなくなる。これにより、ケーブル3の腹圧部での変位動がより好ましく阻止され、ケーブル3が摩擦損傷からよりよく保護される。   Further, it is also possible to adopt a configuration in which the deflection tube 2 and the taper plate 5 are originally provided integrally with the socket 6 and the socket 6 is installed, that is, the taper plate 5 is fixed to the deflection unit 1. Thus, when the deflection tube 2, the taper plate 5, and the socket 6 are integrated, for example, bolts 100 and nuts 101 are used as shown in FIG. The flange 110 provided on the deflection tube 2, the flange 105 at the socket end, and the taper plate 5 are inserted by the bolt 100 and fastened and fixed by the nut 101. When non-uniform tension is applied to the cable 3 in the right direction, for example, by such fixing measures, the socket 6 is fixed to the deflection tube 2 by the bolt 100 and the nut 101 due to the adhesion of the resin, and is not separated from the deflection unit 1. Thereby, the displacement movement in the abdominal pressure part of the cable 3 is more preferably prevented, and the cable 3 is better protected from frictional damage.

更に、偏向管2の両端部はそこに挿通する内管20やケーブル3が当接し引っかかるなどして高密度ポリエチレン(HDPE)被覆が損傷しないようにラッパ状の拡径部28を設けておく。また、偏向部1のコンクリート壁面を形成するための型枠を、施工が最も容易な鉛直に組み付けられるよう、前記拡径する部位の延長を偏向部表面の手前で止めおくものとする。そのため、例えば転用可能なゴム製の半球状フォーマーを用いて偏向部表面の出口29を形成する。   Further, a trumpet-shaped enlarged diameter portion 28 is provided at both ends of the deflection tube 2 so that the inner tube 20 and the cable 3 inserted therethrough are brought into contact with and caught by the cable 3 so that the high density polyethylene (HDPE) coating is not damaged. Further, the extension of the diameter-expanding portion is stopped before the surface of the deflecting portion so that the formwork for forming the concrete wall surface of the deflecting portion 1 can be assembled vertically in the easiest manner. Therefore, for example, the outlet 29 on the surface of the deflecting portion is formed by using a divertable rubber hemispherical former.

なお、上記とは別の実施形態も更に想定できる。図1(d)に示した桁橋等における偏向部で左右の張力差がみられないような場合でも、活荷重などによる張力自体の変動が生じることがある。この場合、前記の張力変動に起因する、各PC鋼より線のめっき被膜の摩擦損傷や、当該摩擦損傷に伴う腐食の懸念も生じていた。そこで、このような懸念を払拭すべく、以下のようにケーブル保護を行うものとする。図14は、本実施形態のケーブル保護方法および固定方法の例4における偏向部でのケーブル保護構造を示す図である。   An embodiment different from the above can be further assumed. Even in the case where there is no difference between the left and right tensions at the deflecting portion in the girder bridge shown in FIG. 1D, the tension itself may fluctuate due to a live load or the like. In this case, there has been a concern about the friction damage of the plated coating of each PC steel wire due to the tension fluctuation and the corrosion accompanying the friction damage. Therefore, in order to eliminate such concerns, cable protection shall be performed as follows. FIG. 14 is a diagram illustrating a cable protection structure at a deflecting unit in Example 4 of the cable protection method and the fixing method of the present embodiment.

例えば偏向部1におけるケーブル3の挿通長が上記した他実施形態におけるものより短い場合、偏向部1内のケーブル挿通全域にわたってエポキシ樹脂7を充填し硬化させる。この処理に際しては、まず偏向部1の両端とケーブル3との間隙に、エポキシ樹脂7の注入用および排出用の各細管90を設置する。そして、前記間隙にパテ状止水材200を封入してシールする。この状態にて前記細管90よりエポキシ樹脂7を注入する。こうして、エポキシ樹脂7による偏向部1と各より線との間の付着および被覆効果を発現し、これによりケーブル3のメッキに対する摩擦損傷、および当該摩擦損傷による腐食の懸念が払拭できる。なお、前記エポキシ樹脂7の注入時において、ケーブル3の被覆材52の除去区間Lの左右にあたるケーブル内部へエポキシ樹脂7が侵入しないよう、予め被覆材52の内部に適宜な止水処理を施しておくものとする。   For example, when the insertion length of the cable 3 in the deflection unit 1 is shorter than that in the other embodiments described above, the epoxy resin 7 is filled and cured over the entire cable insertion region in the deflection unit 1. In this process, first, the thin tubes 90 for injecting and discharging the epoxy resin 7 are installed in the gap between both ends of the deflecting unit 1 and the cable 3. Then, a putty-like waterstop material 200 is sealed in the gap and sealed. In this state, the epoxy resin 7 is injected from the thin tube 90. In this way, the adhesion and covering effect between the deflecting portion 1 and each stranded wire by the epoxy resin 7 is manifested, whereby the frictional damage to the plating of the cable 3 and the concern about corrosion due to the frictional damage can be eliminated. In addition, when the epoxy resin 7 is injected, an appropriate water-stop treatment is applied to the inside of the covering material 52 in advance so that the epoxy resin 7 does not enter the cable corresponding to the left and right of the removal section L of the covering material 52 of the cable 3. I shall keep it.

本発明によれば、橋梁における偏向部を貫通するケーブルの保護を可能とする。また、ソケット内空を充填する充填材として高強度のエポキシ樹脂を用いることで、従来のグラウト材よりも例えば数倍の付着強度が得られるため、PC鋼材等のケーブルとの付着長を数分の1に抑制することが可能となる。したがって、前記ソケットについても全長を抑制可能となる上、従来のようにソケット側断面における内空面をテーパ形状に加工する必要もなくなり、固定装置の製作コストや手間を低減できる。   According to the present invention, it is possible to protect a cable penetrating a deflection portion in a bridge. In addition, by using a high-strength epoxy resin as a filler to fill the socket space, for example, several times the adhesion strength can be obtained compared to conventional grout materials, so the adhesion length with cables such as PC steel materials can be reduced to a few minutes. It is possible to suppress to 1. Accordingly, the total length of the socket can be suppressed, and it is not necessary to process the inner surface of the socket side section into a tapered shape as in the prior art, so that the manufacturing cost and labor of the fixing device can be reduced.

また、ケーブルとして亜鉛メッキPC鋼より線を採用しても、充填材としてエポキシ樹脂を用いるため、セメントグラウトと異なり、水素ガスを発生するといった危惧を払拭できる。   Even if a galvanized PC steel wire is used as the cable, since epoxy resin is used as the filler, unlike the cement grout, the concern that hydrogen gas is generated can be eliminated.

従って、橋梁における偏向部を貫通するケーブルの保護を可能とし、また、このケーブルについて良好な固定性能を簡便かつ効率的に発現可能とできる。   Therefore, it is possible to protect the cable penetrating the deflection portion in the bridge, and it is possible to easily and efficiently express good fixing performance for this cable.

以上、本発明の実施の形態について、その実施の形態に基づき具体的に説明したが、これに限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。   As mentioned above, although embodiment of this invention was described concretely based on the embodiment, it is not limited to this and can be variously changed in the range which does not deviate from the summary.

本実施形態を適用可能な橋梁例の概要構造を示す図である。It is a figure which shows the general | schematic structure of the example of a bridge which can apply this embodiment. 本実施形態のケーブル保護方法例1における手順(a)〜(c)を示す図である。It is a figure which shows the procedure (a)-(c) in the cable protection method example 1 of this embodiment. 本実施形態のケーブル保護方法および固定方法の例1における手順(d)〜(f)を示す図である。It is a figure which shows the procedure (d)-(f) in Example 1 of the cable protection method and fixing method of this embodiment. 本実施形態のケーブル保護方法に用いる(a)テーパプレート、(b)ナットを示す図である。It is a figure which shows the (a) taper plate and (b) nut which are used for the cable protection method of this embodiment. 本実施形態のケーブル保護方法に用いる(a)キャップ、(b)キャップ固定リング、(c)スペーサーを示す図である。It is a figure which shows the (a) cap, (b) cap fixing ring, and (c) spacer which are used for the cable protection method of this embodiment. 本実施形態におけるケーブルの断面構造を示す図である。It is a figure which shows the cross-section of the cable in this embodiment. 本実施形態におけるケーブル固定構造を示す断面図である。It is sectional drawing which shows the cable fixing structure in this embodiment. 本実施形態のケーブル保護方法および固定方法の例2における手順(a)、(b)を示す図である。It is a figure which shows the procedure (a) and (b) in Example 2 of the cable protection method and fixing method of this embodiment. 本実施形態のケーブル保護方法および固定方法の例2における手順(c)、(d)を示す図である。It is a figure which shows the procedures (c) and (d) in Example 2 of the cable protection method and fixing method of this embodiment. 本実施形態のケーブル保護方法および固定方法の例2における手順(e)、(f)を示す図である。It is a figure which shows the procedure (e) and (f) in Example 2 of the cable protection method and fixing method of this embodiment. 本実施形態のケーブル保護方法および固定方法の例3における手順(a)、(b)を示す図である。It is a figure which shows the procedure (a) in the example 3 of the cable protection method of this embodiment, and the fixing method, (b). 本実施形態のケーブル保護方法および固定方法の例3におけるケーブル固定構造を示す断面図である。It is sectional drawing which shows the cable fixing structure in Example 3 of the cable protection method and fixing method of this embodiment. 本実施形態における、偏向管、テーパプレート、およびソケットの一体構造例を示す図である。It is a figure which shows the example of integral structure of the deflection pipe | tube, the taper plate, and the socket in this embodiment. 本実施形態のケーブル保護方法および固定方法の例4における偏向部でのケーブル保護構造を示す図である。It is a figure which shows the cable protection structure in the deflection | deviation part in Example 4 of the cable protection method and fixing method of this embodiment.

符号の説明Explanation of symbols

1 偏向部
2 偏向管
3 HDPE被覆ケーブル
4 亜鉛メッキPC鋼より線束、束線
5 テーパプレート、プレート
6 ソケット
7 エポキシ樹脂
20 内管
30 (被覆材が除去された)部位
50 亜鉛メッキPC鋼より線
51 充填材(或いは成形材)
52 高密度ポリエチレン(HDPE)
DESCRIPTION OF SYMBOLS 1 Deflection part 2 Deflection pipe 3 HDPE coated cable 4 Zinc-plated PC steel wire bundle, bundle wire 5 Tapered plate, plate 6 Socket 7 Epoxy resin 20 Inner tube 30 (Coating material removed) part
50 Galvanized PC steel strand 51 Filler (or molding material)
52 High-density polyethylene (HDPE)

Claims (15)

橋梁におけるサドル構造などの偏向部を挿通するケーブルの保護方法であって、
前記偏向部における偏向管内を挿通するケーブルのうち、前記偏向管経路のうち少なくとも当該偏向管内における腹圧作用区間にあたる部位の被覆材を除去する工程と、
前記被覆材の除去がなされたケーブルを前記偏向管に挿通する工程と、
前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆する工程と、
を含むことを特徴とするケーブル保護方法。
A cable protection method for inserting a deflection part such as a saddle structure in a bridge,
A step of removing a covering material at a portion corresponding to an abdominal pressure acting section in the deflection pipe of the deflection pipe path out of the cable inserted through the deflection pipe in the deflection section;
Inserting the cable from which the covering material has been removed into the deflection tube;
Filling the deflection tube with an epoxy resin, and coating the portion of the cable from which at least the coating material has been removed with the epoxy resin; and
A cable protection method comprising:
請求項1において、
前記偏向管が一重管であり、当該一重管に挿通されたケーブルのうち前記偏向管内における腹圧作用区間にあたり被覆材を除去した部位に対応して、当該一重管内へのエポキシ樹脂の充填を行って、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆することを特徴とするケーブル保護方法。
In claim 1,
The deflection tube is a single tube, and the epoxy resin is filled into the single tube corresponding to the portion of the cable inserted through the single tube where the covering material is removed in the abdominal pressure acting section in the deflection tube. A cable protection method comprising covering at least a portion of the cable from which the covering material has been removed with an epoxy resin.
請求項1または2において、
前記偏向管における腹圧作用区間の曲率が、前記被覆材の耐摩耗性を越える腹圧を生じる曲率以上で、前記エポキシ樹脂の耐摩耗性を越えない腹圧を生じる曲率以下であることを特徴とするケーブル保護方法。
In claim 1 or 2,
The curvature of the abdominal pressure acting section in the deflection tube is equal to or greater than the curvature that generates the abdominal pressure exceeding the wear resistance of the coating material, and is equal to or less than the curvature that generates the abdominal pressure not exceeding the wear resistance of the epoxy resin. Cable protection method.
請求項1において、
前記偏向管が前記ケーブルを挿通する内管を備えた二重管であり、前記エポキシ樹脂の充填を前記内管に対して行うことを特徴とするケーブル保護方法。
In claim 1,
The cable protection method, wherein the deflection pipe is a double pipe provided with an inner pipe through which the cable is inserted, and the epoxy resin is filled into the inner pipe.
請求項4において、
前記偏向管の内管に前記エポキシ樹脂の充填を行うに先立ち、前記内管の端部開口と前記ケーブル外周との間を止水処理する工程と、
内管において前記止水処理の位置よりも偏向部内方側に設けた注入口に対し、前記エポキシ樹脂の充填を行う工程と、
を含むことを特徴とするケーブル保護方法。
In claim 4,
Prior to filling the inner pipe of the deflection pipe with the epoxy resin, water stopping treatment between the end opening of the inner pipe and the outer periphery of the cable;
Filling the epoxy resin with respect to the injection port provided on the inner side of the deflection unit from the position of the water stop treatment in the inner pipe;
A cable protection method comprising:
請求項5において、
前記内管において前記注入口とは偏向部を挟んだ対向位置にあって前記止水処理の位置よりも偏向部内方側に設けた排出口から、前記注入口より充填されたエポキシ樹脂が排出されたことをもってエポキシ樹脂の充填を終了することを特徴とするケーブル保護方法。
In claim 5,
In the inner pipe, the epoxy resin filled from the injection port is discharged from a discharge port provided at a position opposite to the injection port with respect to the deflection unit and provided on the inner side of the deflection unit with respect to the water stop treatment position. The cable protection method is characterized in that the filling of the epoxy resin is terminated.
請求項1〜6のいずれかにおいて、
前記ケーブルは、複数の亜鉛メッキPC鋼より線を束ねた束線を充填材またはラッピング材により断面略円形に成形すると共に、この成形した束線の外周を高密度ポリエチレンで被覆し一体成形したプレファブ型ケーブルであることを特徴とするケーブル保護方法。
In any one of Claims 1-6,
The cable is a prefab in which a bundle of bundles of galvanized PC steel is formed into a substantially circular cross section with a filler or a wrapping material, and the outer periphery of the formed bundle is covered with high-density polyethylene and integrally molded. Cable protection method, characterized by being a type cable.
請求項1〜7のいずれかにおいて、
前記ケーブルが、少なくとも前記腹圧作用区間よりも偏向部外方の部位について、少なくともその内部に止水処理を施したものであることを特徴とするケーブル保護方法。
In any one of Claims 1-7,
The cable protection method according to claim 1, wherein at least a portion outside the deflecting portion with respect to the abdominal pressure acting section is subjected to a water stop treatment inside the cable.
請求項1〜8のいずれかにおいて、
前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、前記偏向部表面から所定長の部位の被覆材を除去する工程と、
前記被覆材が除去された所定長の部位を内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットを用いて、前記所定長の部位を内包し当該ソケット内空にエポキシ樹脂を充填する工程と、
前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートを、前記ソケットと前記偏向部とに固定する工程と、
を備えることを特徴とするケーブル保護方法。
In any one of Claims 1-8,
The step of removing the covering material of a predetermined length from the surface of the deflection unit among the cables that are inserted through the deflection pipe in the deflection unit and protruded from the surface of the deflection unit;
Using a socket that has an inner space that can enclose a portion of the predetermined length from which the covering material has been removed and that encloses the region under a predetermined sealing property, Filling the epoxy resin;
A plate that is between the socket and the surface of the deflection unit and transmits the tension of the cable to the deflection unit via an adhesive force between the epoxy resin and a portion of the predetermined length from which the covering material has been removed; Fixing to a socket and the deflection unit;
A cable protection method comprising:
請求項9において、
前記ソケットは、その側断面において対向する内空表面が略平行である形状を備えると共に、ケーブル長さ方向に分割あるいは開口が可能な構造と、エポキシ樹脂の注入口および排出口とを備えるものであることを特徴とするケーブル保護方法。
In claim 9,
The socket has a shape in which inner surfaces facing each other in a side cross section thereof are substantially parallel, a structure that can be divided or opened in the cable length direction, and an epoxy resin inlet and outlet. A method of protecting a cable, characterized in that there is.
請求項9または10において、
前記偏向管および前記プレートを前記ソケットが一体に備え、ソケットを偏向部に固定することを特徴とするケーブル保護方法。
In claim 9 or 10,
A cable protection method, wherein the socket is integrally provided with the deflection tube and the plate, and the socket is fixed to the deflection section.
請求項1〜11のいずれかにおいて、
前記橋梁をトラス橋とすることを特徴とするケーブル保護方法。
In any one of Claims 1-11,
A cable protection method, wherein the bridge is a truss bridge.
橋梁におけるサドル構造などの偏向部に挿通するケーブルを保護する構造であって、
前記偏向部における偏向管内のうち少なくとも当該偏向管内における腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、
前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなることを特徴とするケーブル保護構造。
It is a structure that protects the cable that passes through the deflection part such as the saddle structure in the bridge,
Inserting the cable from which the covering material in the portion corresponding to the abdominal pressure acting section in the deflection tube in the deflection tube in the deflection unit is removed, into the deflection tube,
A cable protection structure, wherein the deflection tube is filled with an epoxy resin, and at least a portion of the cable from which the covering material has been removed is coated with the epoxy resin.
橋梁におけるサドル構造などの偏向部に挿通するケーブルを保護する構造を備えた構造体であって、
前記偏向部における偏向管内のうち少なくとも当該偏向管内における腹圧作用区間にあたる部位の被覆材を除去したケーブルを、前記偏向管に挿通し、
前記偏向管内にエポキシ樹脂を充填し、前記ケーブルのうち少なくとも前記被覆材が除去された部位をエポキシ樹脂により被覆してなるケーブル保護構造を備えたことを特徴とする構造体。
A structure having a structure for protecting a cable inserted into a deflection portion such as a saddle structure in a bridge,
Inserting the cable from which the covering material in the portion corresponding to the abdominal pressure acting section in the deflection tube in the deflection tube in the deflection unit is removed, into the deflection tube,
A structure having a cable protection structure in which an epoxy resin is filled in the deflection tube and at least a portion of the cable from which the covering material has been removed is covered with an epoxy resin.
橋梁における偏向部を挿通するケーブルの固定装置であって、
前記偏向部における偏向管内を挿通し偏向部表面から突出したケーブルのうち、被覆材を除去した前記偏向部表面から所定長の部位を、内包可能な内空を有し所定の密閉性のもと前記部位を内包するソケットと、
前記所定長の部位を内包した前記ソケット内空にエポキシ樹脂が充填された充填部と、
前記ソケットと前記偏向部表面との間にあって、前記被覆材を除去した所定長の部位と前記エポキシ樹脂との間における付着力を介して前記偏向部に前記ケーブルの張力を伝達するプレートと、
を備えることを特徴とするケーブル固定装置。
A cable fixing device that passes through a deflection part in a bridge,
Among the cables protruding from the surface of the deflection unit through the deflection tube in the deflection unit, a predetermined length portion from the surface of the deflection unit from which the covering material has been removed has an internal space that can be included and has a predetermined sealing property. A socket containing the part;
A filling portion filled with epoxy resin in the socket space containing the predetermined length portion;
A plate that is between the socket and the surface of the deflection unit and transmits the tension of the cable to the deflection unit via an adhesive force between a portion of the predetermined length from which the covering material is removed and the epoxy resin;
A cable fixing device comprising:
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Publication number Priority date Publication date Assignee Title
JP2008169675A (en) * 2007-01-15 2008-07-24 Sumitomo Mitsui Construction Co Ltd Saddle structure

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CN112663475A (en) * 2020-12-25 2021-04-16 广西大学 Truss cable-stayed bridge

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008169675A (en) * 2007-01-15 2008-07-24 Sumitomo Mitsui Construction Co Ltd Saddle structure
JP4728262B2 (en) * 2007-01-15 2011-07-20 三井住友建設株式会社 Saddle structure

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