JP2000328474A - Cable for bridge and method for forming the cable - Google Patents
Cable for bridge and method for forming the cableInfo
- Publication number
- JP2000328474A JP2000328474A JP13016399A JP13016399A JP2000328474A JP 2000328474 A JP2000328474 A JP 2000328474A JP 13016399 A JP13016399 A JP 13016399A JP 13016399 A JP13016399 A JP 13016399A JP 2000328474 A JP2000328474 A JP 2000328474A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- cable
- socket
- cable body
- elastic spacer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Ropes Or Cables (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、橋梁用ケーブル及
びそのケーブルの成形法に関し、詳しくはＰＣ鋼より線
からなるケーブル本体と樹脂製保護管とが一体化したケ
ーブル及びそのケーブルを現場ヤードで成形し得る成形
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable for a bridge and a method of forming the cable, and more particularly, to a cable in which a cable body made of a PC steel wire and a resin protection tube are integrated, and the cable in an on-site yard. It relates to a molding method that can be molded.
【０００２】[0002]
【従来の技術】橋脚上に起立固定したタワー（主塔）か
ら斜め下方に延びたケーブルを補剛桁に直接結合して該
補剛桁を水平に保持したものが斜張橋であるが、この補
剛桁を吊持するケーブルは該ケーブルの形状保持と保護
及び防食を目的として外側に保護管が一体に取り付けら
れている。そして、その保護管として高密度ポリエチレ
ン管や、半割状のアルミカバーやＦＲＰ管やポリプロピ
レン管等が用いられている。2. Description of the Related Art A cable-stayed bridge is a cable in which a cable extending obliquely downward from a tower (main tower) standing and fixed on a pier is directly connected to a stiffening girder and the stiffening girder is held horizontally. The cable for suspending the stiffening girder is integrally provided with a protective tube on the outside for the purpose of maintaining the shape of the cable, protecting the same, and preventing corrosion. As the protective tube, a high-density polyethylene tube, a half-split aluminum cover, an FRP tube, a polypropylene tube, or the like is used.
【０００３】その高密度ポリエチレン管を保護管として
使用する場合、一般的に次の形態が挙げられる。 （１）工場で、ＰＣ鋼より線からなるケーブル本体と一
体化させながら押し出す方法。 ・ケーブル本体と高密度ポリエチレン管が一体化してい
るノングラウトタイプのケーブルで、ケーブル本体と高
密度ポリエチレン管は一体構造。 （２）現場ヤードで一定長さの高密度ポリエチレン管を
つないで（バット溶接）所定長さの保護管を製作し、そ
の保護管のみを架設し、空中でＰＣ鋼より線を１本づつ
引き込みながら架設する方法。 ・ＰＣ鋼より線を後から１本づつ挿入し、空中でケーブ
ルにする。 ・高密度ポリエチレン管とケーブル本体との隙間にグラ
ウトを注入する。（グラウトタイプのケーブル） （３）現場ヤードで一定長さの高密度ポリエチレン管を
つないで（バット溶接）所定長さの保護管を製作し、そ
の保護管に束ねたＰＣ鋼より線（＝ケーブル本体）を挿
入してから、ケーブル全体を架設する方法。 ・ＰＣ鋼より線を現場で束ねてケーブル本体とし、これ
を挿入する。 ・高密度ポリエチレン管とケーブル本体との隙間にグラ
ウトを注入する。（グラウトタイプのケーブル）[0003] When the high-density polyethylene tube is used as a protective tube, the following forms are generally given. (1) A method of extruding while integrating with a cable body made of PC steel strand at a factory.・ A non-grout type cable in which the cable body and the high-density polyethylene pipe are integrated. The cable body and the high-density polyethylene pipe are integrated. (2) A high-density polyethylene pipe of a certain length is connected at the site yard (butt welding) to produce a protective tube of a predetermined length, only the protective tube is erected, and a single PC steel wire is drawn in the air. How to erection while.・ Insert a cable in the air by inserting one PC steel strand at a time. -Inject grout into the gap between the high-density polyethylene pipe and the cable body. (Grout type cable) (3) At the yard, a high-density polyethylene pipe of a certain length is connected (butt welding) to produce a protective tube of a predetermined length, and a PC steel stranded wire (= cable) bundled with the protective tube After inserting the main body, the entire cable is laid.・ Bundle PC steel strands on site to form a cable body and insert it. -Inject grout into the gap between the high-density polyethylene pipe and the cable body. (Grout type cable)
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記した
（１）〜（３）には下記に示す問題点がある。 （ａ） 工場製作ケーブルの場合は、専用の工場を必要
とする。 （ｂ） 現場製作ケーブルの場合は、 最初に一定長さの高密度ポリエチレン管をつないで
所定長さの保護管を製作する必要がある。高密度ポリエ
チレン管の中にＰＣ鋼より線が入っている状態ではつな
ぎ（バット溶接）が出来ない。 ＰＣ鋼より線の挿入を、（２）の場合は空中で行う
必要があり、（３）の場合はＰＣ鋼より線を束ねた重量
の重いもの（ケーブル本体）を挿入する必要がある。 ケーブル架設後、高密度ポリエチレン管とＰＣ鋼よ
り線（ケーブル本体）の隙間にグラウトを入れる必要が
ある。このグラウト注入の為に、架設ケーブル下に足場
を組む必要がある。 尚、高密度ポリエチレン管とＰＣ鋼より線の隙間に注入
するグラウトは、間隔保持の働きと、防錆効果を意図し
て使用されている。The above-mentioned items (1) to (3) have the following problems. (A) For factory-manufactured cables, a dedicated factory is required. (B) In the case of a cable manufactured in the field, it is necessary to first connect a high-density polyethylene pipe of a certain length to manufacture a protection pipe of a predetermined length. In the state where a strand of PC steel is contained in a high-density polyethylene pipe, connection (butt welding) cannot be performed. In the case of (2), it is necessary to insert the PC steel stranded wire in the air, and in the case of (3), it is necessary to insert a heavy PC cable stranded wire (cable body). After laying the cable, grout needs to be inserted into the gap between the high-density polyethylene pipe and the PC steel stranded wire (cable body). For grouting, it is necessary to build a scaffold under the erection cable. The grout injected into the gap between the high-density polyethylene pipe and the strand of PC steel is used for the purpose of maintaining the space and preventing rust.
【０００５】本発明は上記した従来の技術が有する問題
点に鑑みてなされたもので、その目的とするところは、
グラウト注入が不要なノングラウトタイプの現場製作ケ
ーブルを提供することに有る。又、他の目的は重量が重
いＰＣ鋼より線やケーブル本体を動かすこと無く、軽量
の樹脂製保護管を動かしてケーブルの製作を簡便にして
効率よく行うことが出来る成形法を提供することにあ
る。[0005] The present invention has been made in view of the above-mentioned problems of the prior art.
An object of the present invention is to provide a non-grout type on-site cable which does not require grouting. Another object of the present invention is to provide a molding method capable of easily and efficiently producing a cable by moving a lightweight resin protective tube without moving a heavy PC steel strand or a cable body. is there.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する為に
本発明が講じた技術的手段は、所定長さを有したＰＣ鋼
より線を束ねたケーブル本体の外周に弾性スペーサを螺
旋状に巻回固定し、その弾性スペーサの外側に該弾性ス
ペーサを圧縮してパイプ状の樹脂製保護管を装着固定す
ると共に、ケーブル本体の両側にソケットを備えた構成
を特徴とする。上記ケーブル本体を構成するＰＣ鋼より
線としては、そのままでもよいが防錆効果を得る為に外
周面にポリエチレン被覆を施したポリエチレン被覆ＰＣ
鋼より線、エポキシ樹脂被覆ＰＣ鋼より線、或いは亜鉛
メッキＰＣ鋼より線の外周にポリエチレン被覆を施した
ものなど何れでもよいが、より高い防錆効果を考慮した
場合は亜鉛メッキＰＣ鋼より線にポリエチレン被覆を行
ったものを使用するのが効果的である。In order to achieve the above-mentioned object, a technical measure taken by the present invention is to spirally dispose an elastic spacer on the outer periphery of a cable body having a predetermined length of PC steel stranded wires. It is characterized in that it is wound and fixed, the elastic spacer is compressed outside the elastic spacer, a pipe-shaped resin protective tube is mounted and fixed, and sockets are provided on both sides of the cable body. As the PC steel stranded wire constituting the above cable body, a polyethylene-coated PC having an outer peripheral surface coated with polyethylene for obtaining a rust-preventive effect may be used as it is.
Steel stranded wire, epoxy resin-coated PC steel stranded wire, or galvanized PC steel stranded wire with polyethylene coating may be used, but if higher rust prevention effect is considered, galvanized PC stranded wire It is effective to use one coated with polyethylene.
【０００７】ケーブル本体の外周に螺旋状に巻き付ける
弾性スペーサは、発泡ポリエチレン、発泡ウレタン、発
泡ゴム等の軟質発泡材からなる所定幅、所定厚さのテー
プで、そのテープサイズは例えば、幅：５０ｍｍ、厚
さ：１０〜２０ｍｍで、裏面には結束一体化を計る粘着
テープが設けられ巻き付け固定し得るようになってい
る。又、この弾性スペーサの螺旋巻ピッチは任意である
が、該弾性スペーサの機能及び外側に装着する保護管の
挿入性を考慮して決定する。その螺旋巻のピッチとして
は、例えば５００ｍｍ位が効果的である。The elastic spacer spirally wound around the outer periphery of the cable body is a tape of a predetermined width and a predetermined thickness made of a soft foam material such as foamed polyethylene, urethane foam, foamed rubber, and the tape size is, for example, 50 mm in width. The thickness is 10 to 20 mm, and an adhesive tape for binding and unifying is provided on the back surface so that it can be wound and fixed. The spiral winding pitch of the elastic spacer is optional, but is determined in consideration of the function of the elastic spacer and the insertability of the protective tube mounted on the outside. As the pitch of the spiral winding, for example, about 500 mm is effective.
【０００８】上記樹脂製保護管としては高密度ポリエチ
レン管やポリプロピレン管、塩化ビニル管等の熱可塑性
樹脂管を用い、その１本の長さは例えば５ｍ〜１０ｍと
し、ケーブル本体の長さに応じて保護管をつないで必要
な長さに形成する。その場合、保護管の接続としては、 ケーブル本体が中に入っている状態で高密度ポリエ
チレン管等の熱可塑性樹脂管の突合わせ端部を半割形状
のヒータで溶かし加圧して接合一体化する。（バット溶
接） 中空の専用継手を用いて高密度ポリエチレン管をつ
なぎ、その専用継手に埋め込んだヒータに電流を通して
継手及び高密度ポリエチレン管の熱可塑性樹脂管を溶か
して溶着一体化する。（エレクトロフュージョン溶接） 前記との方法を併用した保護管の接続法。 の手法が挙げられる。As the resin protective tube, a thermoplastic resin tube such as a high-density polyethylene tube, a polypropylene tube or a vinyl chloride tube is used. The length of one tube is, for example, 5 m to 10 m, depending on the length of the cable body. To form the required length by connecting protective tubes. In this case, as for the connection of the protective tube, the butt end of a thermoplastic resin tube such as a high-density polyethylene tube is melted by a half-shaped heater with the cable body inside, and pressurized and joined together. . (But welding) A high-density polyethylene pipe is connected using a hollow exclusive joint, and a current embedded in a heater embedded in the special joint is melted to fuse and integrate the thermoplastic resin pipe of the high-density polyethylene pipe. (Electrofusion welding) A method of connecting a protective tube using the above method in combination. Technique.
【０００９】又、上記両端（固定側、可動側）のソケッ
ト口金と樹脂製保護管とに亘って外側にラップ管を挿入
固定し、そのラップ管と保護管とに亘って熱収縮管を被
着してラップ管を固定してもよい。A wrap tube is inserted and fixed outside between the socket bases at both ends (fixed side and movable side) and the resin protection tube, and a heat shrink tube is covered over the wrap tube and the protection tube. The wrap tube may be fixed by wearing.
【００１０】そして、上記ケーブルの成形法は、 ａ．ＰＣ鋼より線を所定の長さに切断する切断工程と、 ｂ．その切断した所定長さのＰＣ鋼より線を束ねたケー
ブル本体の一方に固定側のソケットを取り付けるソケッ
ト固定工程と、 ｃ．ケーブル本体の外周にテープ状の弾性スペーサを螺
旋状に巻き付け固定する弾性スペーサ巻き付け工程と、 ｄ．ケーブル本体の外側に樹脂製保護管の外径よりも僅
か大径な内径を有するラップ管を挿入すると共に、前記
螺旋状に巻き付けた弾性スペーサの外側にパイプ状の樹
脂製保護管を前記弾性スペーサを圧縮しながら挿入装着
し、ケーブル本体の長さに応じて複数個を溶接連結する
保護管装着工程と、 ｅ．前記ラップ管を前記ソケットの口金と樹脂製保護管
との外周面に亘ってセットバックしてラップ管を定着
し、且つそのラップ管と樹脂製保護管とに亘って熱収縮
管を取り付け固定するラップ管取り付け工程と、 ｆ．ケーブル本体の他方に可動側のソケットを固定する
ソケット固定工程と、 ｇ．前記ラップ管を前記ソケットの口金と樹脂製保護管
との外周面に亘ってセットバックしてラップ管を定着
し、且つそのラップ管と樹脂製保護管とに亘って熱収縮
管を取り付け固定するラップ管取り付け工程、 とからなることを特徴とする。[0010] The method of forming the cable is as follows: a. A cutting step of cutting a PC steel strand into a predetermined length; b. A socket fixing step of attaching a fixed-side socket to one of the cut cable main bodies in which a predetermined length of PC steel stranded wire is bundled; c. An elastic spacer winding step of spirally winding and fixing a tape-shaped elastic spacer around the outer periphery of the cable body; d. A wrap tube having an inner diameter slightly larger than the outer diameter of the resin protection tube is inserted outside the cable body, and a pipe-shaped resin protection tube is attached to the outside of the helically wound elastic spacer. Inserting a protective tube while compressing, and welding and connecting a plurality of tubes according to the length of the cable body; e. The wrap tube is set back over the outer peripheral surface of the socket of the socket and the resin protection tube to fix the wrap tube, and a heat shrink tube is attached and fixed over the wrap tube and the resin protection tube. Wrap tube mounting step; f. A socket fixing step of fixing the movable socket to the other end of the cable body; g. The wrap tube is set back over the outer peripheral surface of the socket of the socket and the resin protection tube to fix the wrap tube, and a heat shrink tube is attached and fixed over the wrap tube and the resin protection tube. A lap tube mounting step.
【００１１】上記成形法において、ケーブル本体の外側
に装着する樹脂管相互の接続は、前記したバット溶接、
或いは専用継手使用によるエレクトロフュージョン溶
接、バット溶接とエレクトロフュージョン溶接の両方法
の併用、の何れでもよいものである。In the above molding method, the resin pipes mounted on the outside of the cable body are connected to each other by the butt welding described above.
Alternatively, any one of electrofusion welding using a dedicated joint, and both of butt welding and electrofusion welding may be used in combination.
【００１２】上記の手段によれば、ＰＣ鋼より線の結束
一体化とケーブル本体との隙間間隔の保持を弾性スペー
サが行う為、グラウトを注入した従来ケーブルに比べて
軽量化を計れ、架設作業も容易となる。又、その成形法
は最初にＰＣ鋼より線を結束してケーブル本体を形成
し、そのケーブル本体に対して軽量な保護管（高密度ポ
リエチレン管）を挿入操作する為、従来のＰＣ鋼より線
やケーブル本体を移動させていた従来の成形法に比べて
大幅に作業効率を高めることが出来る。しかも保護管と
ケーブル本体の隙間にグラウトを注入する必要が無い
為、ケーブル下に足場を組む必要が無く作業能率を高め
ることが出来る。According to the above means, since the elastic spacers perform binding and integration of the PC steel stranded wires and maintain the gap between the cable main body, the weight can be reduced as compared with the conventional cable into which grout is injected, and the erection work can be performed. Also becomes easier. In addition, the molding method first binds a PC steel strand to form a cable body, and inserts a lightweight protective tube (high-density polyethylene pipe) into the cable body. Work efficiency can be greatly improved as compared with the conventional molding method in which the cable body is moved. In addition, since there is no need to inject grout into the gap between the protective tube and the cable body, there is no need to form a scaffold under the cable, thereby improving work efficiency.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は本発明に係る橋梁用ケーブ
ルの実施の一例を示し、ケーブルＡはＰＣ鋼より線１を
複数本結束して形成されたケーブル本体２と、そのケー
ブル本体２の外周に螺旋状に巻き付けた弾性スペーサ３
と、その弾性スペーサ３の外側に装着した樹脂製保護管
４と、前記ケーブル本体２の一方端に取り付けた固定側
のソケット５と、他方端に取り付けた可動側のソケット
６、更に固定側及び可動側のソケット５，６の口金７，
８と前記樹脂製保護管４とに亘ってその外側に挿入した
ラップ管９，１０と、このラップ管９，１０を定着固定
する熱収縮管１１，１２とで構成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a bridge cable according to the present invention. A cable A is a cable body 2 formed by binding a plurality of PC stranded wires 1, and spirally wound around the outer periphery of the cable body 2. Elastic spacer 3
A resin protective tube 4 mounted on the outside of the elastic spacer 3, a fixed socket 5 mounted on one end of the cable body 2, a movable socket 6 mounted on the other end, and a fixed side Bases 7 of movable sockets 5 and 6,
The wrapping tubes 9 and 10 are inserted outside the protective tube 8 and the resin protection tube 4 and heat-shrinkable tubes 11 and 12 for fixing and fixing the wrapping tubes 9 and 10 are provided.
【００１４】ケーブル本体２を構成するＰＣ鋼より線１
は、JIS Ｇ3536に規定されている７本よりＰＣ鋼より
線にポリエチレン被覆を施した今日周知のもので、この
ＰＣ鋼より線１をケーブル本体２の外径に応じて所定本
数（例えば７本、１９本、３７本６１本、９１本等）を
結束する。又、所定長さに切断したＰＣ鋼より線１の両
端には、無応力の状態で圧着グリップ１３が取り付けら
れ、その圧着グリップ１３が固定側のソケット５、及び
可動側のソケット６の定着部に挿入定着される。PC steel strand 1 constituting the cable body 2
Is a well-known type of PC steel stranded wire coated with polyethylene from 7 wires stipulated in JIS G3536. The number of the PC steel wires 1 is predetermined according to the outer diameter of the cable body 2 (for example, 7 wires). , 19, 37, 61, 91, etc.). A crimping grip 13 is attached to both ends of the PC steel strand 1 cut to a predetermined length without stress, and the crimping grip 13 is fixed to the fixed side socket 5 and the movable side socket 6. Inserted and fixed.
【００１５】上記ケーブル本体２の外周に螺旋状に巻き
付ける弾性スペーサ３は、該ケーブル本体２を構成する
所要本数のＰＣ鋼より線１を結束すると共に、該ケーブ
ル本体２の外側に挿入する樹脂製保護管４の内面との隙
間間隔を保持するもので、この弾性スペーサ３は発泡ポ
リエチレン製のテープで構成され、その裏面（ケーブル
本体２と接触する面）には粘着テープが取り付けられ、
これにより巻き付け固定を容易且つ確実に行うことが出
来るようになっている。その弾性スペーサ３のテープ形
態は、厚さ１０ｍｍ〜２０ｍｍ、幅５０ｍｍのものが好
適である。尚、弾性スペーサ３の厚さはケーブル本体２
の外周に巻き付けた時の外径が樹脂製保護管４の内径よ
り僅かに大となる厚さとし、樹脂製保護管の挿入により
弾性スペーサ３が圧縮されて該保護管４との隙間保持が
ガタツキなく行なわれるようになっている。An elastic spacer 3 spirally wound around the outer periphery of the cable main body 2 binds a required number of PC stranded wires 1 constituting the cable main body 2 and is made of a resin inserted into the outside of the cable main body 2. The elastic spacer 3 is made of a foamed polyethylene tape, and an adhesive tape is attached to the back surface (the surface that comes into contact with the cable main body 2).
As a result, the winding and fixing can be performed easily and reliably. The tape form of the elastic spacer 3 is preferably 10 mm to 20 mm in thickness and 50 mm in width. The thickness of the elastic spacer 3 is the same as that of the cable body 2.
The outer diameter when wrapped around the outer periphery of the protective tube 4 is slightly larger than the inner diameter of the resin protective tube 4, and the elastic spacer 3 is compressed by the insertion of the resin protective tube 4 so that the gap between the elastic spacer 3 and the protective tube 4 is loose. It is done without.
【００１６】樹脂製保護管４は、高密度ポリエチレン管
からなる一定長さのパイプで、その長さとしては例えば
５．０ｍ〜１０ｍが挿入作業等の点から効果的である。
そして、この樹脂製保護管４はケーブルの長さに応じて
複数本を挿入し接続するが、樹脂製保護管４同士の接続
は、突き合わせる保護管の端面を溶かして溶着するバ
ット溶接、中空の継手を用いて保護管をつなぎ、継手
に埋め込んだヒータに電流を通して継手及び保護管を溶
かして溶着一体化す専用継手接続、前記との併用
等、何れでもよいものである。The resin protection tube 4 is a high-density polyethylene pipe having a fixed length, and a length of, for example, 5.0 m to 10 m is effective in terms of insertion work and the like.
A plurality of resin protective tubes 4 are inserted and connected in accordance with the length of the cable. The connection between the resin protective tubes 4 is performed by butt welding or hollow welding in which the end faces of the butting protective tubes are melted and welded. The joint may be connected to the protective tube using the joint described above, a current may be passed through a heater embedded in the joint, and the joint and the protective tube may be fused and integrated by welding.
【００１７】上記樹脂製保護管４は固定側のソケット５
と可動側のソケット６の夫々の口金７，８間に挿入配置
される為、口金７と樹脂製保護管４、及び口金８と樹脂
製保護管４とに亘って外側にラップ管９，１０を挿入
し、更にそのラップ管９と樹脂製保護管４、及びラップ
管１０と樹脂製保護管４とに亘って外側に熱収縮管１
１，１２を定着固定して保護管４端部のシール処理が行
なわれている。The above-mentioned resin protective tube 4 is fixed to the socket 5 on the fixed side.
And the socket 6 on the movable side are inserted between the bases 7, 8, so that the wrap pipes 9, 10 extend outwardly over the base 7 and the resin protection tube 4 and between the base 8 and the resin protection tube 4. The heat-shrinkable tube 1 is further extended over the wrap tube 9 and the resin protection tube 4 and the wrap tube 10 and the resin protection tube 4.
A fixing process is performed on the ends of the protection tube 4 by fixing the fixing members 1 and 12.
【００１８】次に、上記したケーブルの成形法について
図２に基づき説明する。 ａ．切断工程 ＰＣ鋼より線を得ようとするケーブルの長さに応じて所
定の長さに切断する。 ｂ．ソケット（固定側）固定工程 その切断した所定長さのＰＣ鋼より線１の一方端に、無
応力の状態で圧着グリップ１３を取り付け、そうした各
ＰＣ鋼より線１を定着部１４に挿入してケーブル本体２
にソケット付けする。そして、ソケット５部内にはＡＰ
Ｓコンパウンド１５を充填してＰＣ鋼より線１との一体
化を図り、防水加工と耐疲労性を向上させる。 ｃ．弾性スペーサ巻き付け工程（図３（ａ）参照） ケーブル本体２の外周にテープ状の弾性スペーサ３を裏
面の粘着テープ１６を介して螺旋状に巻き付け固定す
る。 ｄ．保護管装着工程 前記螺旋状に巻き付けた弾性スペーサ３の外側にパイプ
状の樹脂製保護管４を、前記弾性スペーサ３を圧縮しな
がら回動挿入し、且つケーブルの長さに応じて順次挿入
する樹脂製保護管４相互は溶接接続する。樹脂製保護管
４相互の溶接接続はバット溶接（図４参照）、専用継手
を用いての接続（図５参照）を選択使用する。 ｅ．ラップ管取り付け工程（図３（ｂ）、（ｃ）参照） 前記樹脂製保護管４の外径より僅か大径な内径を有する
ラップ管９を前記樹脂製保護管４の外側に挿入し、これ
をソケット５の口金７と樹脂製保護管４との外周面に亘
ってセットバックしてラップ管９を定着し、且つそのラ
ップ管９と樹脂製保護管４とに亘って熱収縮管１１を取
り付けてラップ管９を固定する。 ｆ．ソケット（可動側）固定工程 ケーブル本体２の他方に、（ｂ）固定側ソケットの固定
工程と同様の作業を行って可動側のソケット６を固定す
る。この時、ソケット６を取り付ける前にケーブル本体
２に可動側ソケットに取り付けるラップ管１０を挿入し
ておく。 ｇ．ラップ管取り付け工程 前記ラップ管１０を前記ソケット６の口金８と樹脂製保
護管４との外周面に亘ってセットバックしてラップ管１
０を定着し、且つそのラップ管１０と樹脂製保護管４と
に亘って熱収縮管１２を取り付けてラップ管１０を固定
する。 上記ａ〜ｇの工程によってケーブルＡが完成される。Next, a method of forming the above-described cable will be described with reference to FIG. a. Cutting Step The cable is cut into a predetermined length according to the length of the cable from which the PC strand is to be obtained. b. Socket (Fixed Side) Fixing Step A crimping grip 13 is attached to one end of the cut PC steel strand 1 having a predetermined length in a stress-free state, and each such PC steel strand 1 is inserted into the fixing section 14. Cable body 2
To the socket. And there is an AP in the socket 5
The S compound 15 is filled to integrate with the PC steel strand 1 to improve waterproofing and fatigue resistance. c. Elastic Spacer Winding Step (See FIG. 3A) A tape-shaped elastic spacer 3 is spirally wound around the outer periphery of the cable body 2 via an adhesive tape 16 on the back surface. d. Protection Tube Attaching Step A pipe-shaped resin protection tube 4 is rotatably inserted outside the spirally wound elastic spacer 3 while compressing the elastic spacer 3 and sequentially inserted according to the length of the cable. The resin protection tubes 4 are connected by welding. The welding connection between the resin protection tubes 4 is selectively selected from butt welding (see FIG. 4) and connection using a special joint (see FIG. 5). e. Lap tube attaching step (see FIGS. 3B and 3C) A wrap tube 9 having an inner diameter slightly larger than the outer diameter of the resin protective tube 4 is inserted outside the resin protective tube 4, and Is set back over the outer peripheral surface of the base 7 of the socket 5 and the resin protective tube 4 to fix the wrap tube 9, and the heat shrink tube 11 is extended over the wrap tube 9 and the resin protective tube 4. Attach and fix the wrap tube 9. f. Socket (movable side) fixing step The same operation as in the step (b) of fixing the fixed side socket is performed on the other side of the cable body 2 to fix the movable side socket 6. At this time, the wrap tube 10 to be attached to the movable socket is inserted into the cable body 2 before the socket 6 is attached. g. Wrap tube attaching step The wrap tube 10 is set back over the outer peripheral surface of the base 8 of the socket 6 and the resin protection tube 4 to wrap the wrap tube 1.
0 is fixed, and the heat-shrinkable tube 12 is attached across the wrap tube 10 and the resin protection tube 4 to fix the wrap tube 10. The cable A is completed by the steps a to g.
【００１９】次にケーブル本体２が入っている状態で、
樹脂製保護管４相互を接続するバット溶接と、専用継手
を使用しての接続について簡単に説明する。先ず、挿入
した樹脂製保護管４の端面を突き合わせて溶接するバッ
ト溶接は、図４に示すようにつなぎ合わせる両樹脂製保
護管４，４の端面の間に、半円弧型をした２分割ヒータ
１７，１７’を挟入配置し、その２分割ヒータ１７，１
７’の両面で樹脂製保護管４，４の端面を溶かし、その
後前記２分割ヒータ１７，１７’を径方向外側に向けて
移動させ、樹脂製保護管４，４の端面を突き合わせて加
圧し接続一体化する。Next, with the cable body 2 inserted,
Butt welding for connecting the resin protective tubes 4 to each other and connection using a dedicated joint will be briefly described. First, in the butt welding in which the end faces of the inserted resin protection tubes 4 are butt-welded, a semi-circular two-part heater is provided between the end surfaces of the resin protection tubes 4 and 4 to be connected as shown in FIG. 17 and 17 'are interposed therebetween, and the two-part heaters 17 and 17'
The end faces of the resin protection tubes 4 and 4 are melted on both sides of 7 ′, and then the two-part heaters 17 and 17 ′ are moved radially outward, and the end faces of the resin protection tubes 4 and 4 are pressed against each other and pressurized. Connect and integrate.
【００２０】専用継手１８を使用して接続する場合は、
図５に示すように専用継手１８を、弾性スペーサ３の外
周面と樹脂製保護管４の内側面との間にに挿入し得るパ
イプ１８ａと、そのパイプ１８ａにおける継手部に埋設
したニクロム線、ニッケル線等の発熱線１８ｂとで構成
し、この専用継手１８を介して樹脂製保護管４をつな
ぎ、前記発熱線１８ｂに通電することで該専用継手１８
及び継手部に挿入された両樹脂製保護管４の端部が溶
け、溶着一体化される。When connecting using the dedicated joint 18,
As shown in FIG. 5, a pipe 18a capable of inserting the dedicated joint 18 between the outer peripheral surface of the elastic spacer 3 and the inner surface of the resin protective tube 4, a nichrome wire embedded in the joint of the pipe 18a, A heat-generating wire 18b such as a nickel wire is used. The protective tube 4 made of resin is connected through the special joint 18, and the heat is applied to the heat-generating wire 18b.
The ends of the resin protective tubes 4 inserted into the joints are melted and integrated by welding.
【００２１】上記接続法によれば、中にケーブル本体２
が入っている状態で樹脂製保護管の接続が可能となる。
そして、最初にＰＣ鋼より線１を束ね、弾性スペーサ３
で結束一体化してケーブル本体２を構成し、これに樹脂
製保護管４を挿入する手法としたので、ケーブル成形に
おける作業は軽量の樹脂製保護管４を動かすことでよ
く、作業効率を高めることができる。又、ケーブル本体
２と樹脂製保護管の間に発泡ポリエチレン製等の軟質発
泡材の弾性スペーサ３が螺旋状に巻回配置されて両者の
隙間間隔を保持するため、従来のグラウト注入は不要と
なり、その結果グラウト注入の為のケーブル下の足場構
築も不要となる。According to the above connection method, the cable body 2
The connection of the resin protection tube becomes possible in the state where the is inserted.
First, the PC steel strand 1 is bundled, and the elastic spacer 3
The cable main body 2 is formed by unifying the cable and the resin protective tube 4 is inserted into the cable main body 2. Therefore, the work in the cable molding may be performed by moving the lightweight resin protective tube 4, thereby improving the working efficiency. Can be. In addition, since the elastic spacers 3 made of a soft foam material such as foamed polyethylene are spirally wound between the cable body 2 and the resin protection tube to maintain the gap between them, the conventional grout injection becomes unnecessary. As a result, there is no need to construct a scaffold under the cable for grouting.
【００２２】[0022]
【発明の効果】本発明の橋梁用ケーブルは請求項１に記
載の構成により、グラウト注入が不要なノングラウトタ
イプの現場製作が可能なケーブルを提供することができ
る。又、請求項２に記載の構成により、重量が重いＰＣ
鋼より線やケーブル本体を動かすこと無く、軽量の樹脂
製保護管を動かしてケーブルの製作を簡便にして効率よ
く行うことが出来る成形法を提供できる。そして、その
成形はグラウトの注入を行わない為、ケーブル下の足場
設置が不要となり、作業性を向上できる。According to the bridge cable of the present invention, according to the first aspect of the present invention, it is possible to provide a non-grout type cable which does not require grouting and can be manufactured on site. According to the second aspect of the present invention, a heavy PC
It is possible to provide a molding method capable of easily and efficiently producing a cable by moving a lightweight resin protective tube without moving a steel strand or a cable main body. And since the grout is not injected in the molding, it is not necessary to install a scaffold under the cable, and the workability can be improved.
【図１】 本発明に係る橋梁用ケーブルの実施の一例を
示す断面図である。FIG. 1 is a cross-sectional view showing an example of an embodiment of a bridge cable according to the present invention.
【図２】 図１の（２）−（２）線に沿える拡大断面図
である。FIG. 2 is an enlarged sectional view taken along line (2)-(2) of FIG.
【図３】 上記ケーブルの成形工程を示し、（ａ）は弾
性スペーサ巻き付け工程、（ｂ）は保護管装着工程、
（ｃ）はラップ管取り付け工程を示す。FIG. 3 shows a step of forming the cable, (a) a step of winding an elastic spacer, (b) a step of mounting a protective tube,
(C) shows a lap tube attaching process.
【図４】 樹脂製保護管をバット溶接する構成を示し、
（ａ）は半円弧型の２分割ヒータを保護管の端面間にセ
ットする状態を示す一部切欠断面図、（ｂ）はセットし
て保護管の端面を溶かしている状態を示す一部切欠断面
図である。FIG. 4 shows a configuration in which a resin protection tube is butt-welded,
(A) is a partially cutaway sectional view showing a state in which a semicircular arc-shaped two-piece heater is set between end faces of a protective tube, and (b) is a partially cutaway view showing a state in which the end face of the protective tube is set and melted. It is sectional drawing.
【図５】 樹脂製保護管を専用継手で接続する構成を示
し、（ａ）は専用継手で保護管をつないだ状態を示す断
面図、（ｂ）は通電して継手及び保護管を溶着した状態
を示す断面図である。5A and 5B show a configuration in which a resin protection tube is connected by a dedicated joint, FIG. 5A is a cross-sectional view showing a state in which the protection tube is connected by a special joint, and FIG. It is sectional drawing which shows a state.
Ａ…ケーブル １…ＰＣ鋼より線 ２…ケーブル本体 ３…弾性スペーサ ４…樹脂製保護管 ５、６…ソケット ７、８…ソケットの口金 ９、１０…ラップ管 １１、１２…熱収縮管 A: Cable 1: PC stranded wire 2: Cable main body 3: Elastic spacer 4: Resin protection tube 5, 6, Socket 7, 8: Socket base 9, 10, Lapping tube 11, 12: Heat shrink tube
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１２年１月２６日（２０００．１．２
６）[Submission Date] January 26, 2000 (2000.1.2
6)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Correction target item name] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森房 春海 滋賀県野洲郡野洲町三上2306番地の７ 中 国塗料株式会社内 Ｆターム(参考） 2D059 AA42 BB06 GG02 3B153 AA06 AA07 AA22 AA45 AA46 AA50 CC13 CC52 DD14 DD26 DD28 DD29 FF03 GG40 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Harumi Harumi, 2306 No. 2-7, Mikami, Yasu-cho, Yasu-gun, Shiga Prefecture F-term in China Paint Co., Ltd. CC52 DD14 DD26 DD28 DD29 FF03 GG40
Claims (2)
ケーブル本体の外周に弾性スペーサを螺旋状に巻回固定
し、その弾性スペーサの外側に該弾性スペーサを圧縮し
てパイプ状の樹脂製保護管を装着固定すると共に、ケー
ブル本体の両側にソケットを備えたことを特徴とする橋
梁用ケーブル。An elastic spacer is helically wound around an outer periphery of a cable body having a predetermined length of bundled PC stranded wires, and the elastic spacer is compressed outside the elastic spacer to form a pipe. A bridge cable comprising a resin protection tube mounted and fixed, and sockets provided on both sides of a cable body.
端にソケットを備え、その両ソケット間のケーブル本体
の外側に樹脂製保護管が一体に装着されたケーブルの成
形法であって、 ａ．ＰＣ鋼より線を所定の長さに切断する切断工程と、 ｂ．その切断した所定長さのＰＣ鋼より線からなるケー
ブル本体の一方に固定側のソケットを取り付けるソケッ
ト固定工程と、 ｃ．ケーブル本体の外周にテープ状の弾性スペーサを螺
旋状に巻き付け固定する弾性スペーサ巻き付け工程と、 ｄ．ケーブル本体の外側に樹脂製保護管の外径よりも僅
か大径な内径を有するラップ管を挿入すると共に、前記
螺旋状に巻き付けた弾性スペーサの外側にパイプ状の樹
脂製保護管を前記弾性スペーサを圧縮しながら挿入装着
し、ケーブル本体の長さに応じて複数個を溶接連結する
保護管装着工程と、 ｅ．前記ラップ管を前記ソケットの口金と樹脂製保護管
との外周面に亘ってセットバックしてラップ管を定着
し、且つそのラップ管と樹脂製保護管とに亘って熱収縮
管を取り付け固定するラップ管取り付け工程と、 ｆ．ケーブル本体の他方に可動側のソケットを固定する
ソケット固定工程と、 ｇ．前記ラップ管を前記ソケットの口金と樹脂製保護管
との外周面に亘ってセットバックしてラップ管を定着
し、且つそのラップ管と樹脂製保護管とに亘って熱収縮
管を取り付け固定するラップ管取り付け工程、とからな
ることを特徴とする橋梁用ケーブルの成形法。2. A method of molding a cable comprising: a cable body made of a PC steel wire; and sockets provided at both ends of the cable body, and a resin protection tube integrally mounted on the outside of the cable body between the sockets, a. A cutting step of cutting a PC steel strand into a predetermined length; b. A socket fixing step of attaching a fixed-side socket to one of the cut cable main bodies made of PC steel stranded wire having a predetermined length; c. An elastic spacer winding step of spirally winding and fixing a tape-shaped elastic spacer around the outer periphery of the cable body; d. A wrap tube having an inner diameter slightly larger than the outer diameter of the resin protection tube is inserted outside the cable body, and a pipe-shaped resin protection tube is attached to the outside of the helically wound elastic spacer. Inserting a protective tube while compressing, and welding and connecting a plurality of tubes according to the length of the cable body; e. The wrap tube is set back over the outer peripheral surface of the socket of the socket and the resin protection tube to fix the wrap tube, and a heat shrink tube is attached and fixed over the wrap tube and the resin protection tube. Wrap tube mounting step; f. A socket fixing step of fixing the movable socket to the other end of the cable body; g. The wrap tube is set back over the outer peripheral surface of the socket of the socket and the resin protection tube to fix the wrap tube, and a heat shrink tube is attached and fixed over the wrap tube and the resin protection tube. A method for forming a cable for a bridge, comprising a lap pipe attaching step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13016399A JP3061270B1 (en) | 1999-05-11 | 1999-05-11 | Bridge cable and method of forming the cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13016399A JP3061270B1 (en) | 1999-05-11 | 1999-05-11 | Bridge cable and method of forming the cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3061270B1 JP3061270B1 (en) | 2000-07-10 |
| JP2000328474A true JP2000328474A (en) | 2000-11-28 |
Family
ID=15027525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13016399A Expired - Fee Related JP3061270B1 (en) | 1999-05-11 | 1999-05-11 | Bridge cable and method of forming the cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3061270B1 (en) |
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| JP2009108604A (en) * | 2007-10-30 | 2009-05-21 | Ihi Corp | Main cable antirust system, bridge, cable cover, and antirust method for main cable |
| WO2009057356A1 (en) * | 2007-10-30 | 2009-05-07 | Ihi Corporation | Device and method for rust-preventing of cable supporting bridge |
| US8042213B2 (en) | 2007-10-30 | 2011-10-25 | Ihi Infrastructure Systems Co., Ltd. | Device and method for preventing rusting of cable for supporting bridge |
| GB2466421B (en) * | 2007-10-30 | 2013-01-02 | Ihi Infrastructure Sys Co Ltd | Device and method for preventing rusting of cable for supporting bridge |
| JP2009068333A (en) * | 2008-12-15 | 2009-04-02 | Sumitomo Denko Steel Wire Kk | Handling method of prefabricated cable |
| CN106284075A (en) * | 2016-09-23 | 2017-01-04 | 石家庄铁道大学 | Bifilar helix hot extruded polyethylene half parallel steel wire suspension cable and parameter determination method thereof |
| CN106284075B (en) * | 2016-09-23 | 2018-08-14 | 石家庄铁道大学 | The parameter determination method of half parallel steel wire suspension cable of bifilar helix hot extruded polyethylene |
| KR101812595B1 (en) * | 2017-06-15 | 2017-12-29 | 컨텍이앤씨 주식회사 | Cutting apparatus for tendon and bridge displacement detecting method |
| KR102488197B1 (en) * | 2022-06-17 | 2023-01-13 | 다올이앤씨 주식회사 | Methods for repairing of cable-stayed bridges and bracket used therefor |
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| JP3061270B1 (en) | 2000-07-10 |
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