JP3462623B2 - Partially liquid-tight structure of multi-strand cable consisting of PC steel strands - Google Patents
Partially liquid-tight structure of multi-strand cable consisting of PC steel strandsInfo
- Publication number
- JP3462623B2 JP3462623B2 JP13277595A JP13277595A JP3462623B2 JP 3462623 B2 JP3462623 B2 JP 3462623B2 JP 13277595 A JP13277595 A JP 13277595A JP 13277595 A JP13277595 A JP 13277595A JP 3462623 B2 JP3462623 B2 JP 3462623B2
- Authority
- JP
- Japan
- Prior art keywords
- spacer
- steel
- stranded wire
- sealing body
- elastic sealing
- 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.)
- Expired - Lifetime
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Reinforcement Elements For Buildings (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はＰＣ鋼より線群よりなる
マルチストランドケーブルの部分液密性を確保するため
の構造および前記構造を用いた構造物のＰＣ鋼より線群
定着部の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for ensuring partial liquid-tightness of a multi-strand cable composed of a PC steel strand group and a structure of a PC steel strand group fixing portion of a structure using the structure. .
【０００２】[0002]
【従来の技術】ＰＣ鋼より線群よりなるマルチストラン
ドケーブルが外ケーブルとして使用される場合、図３に
示すようにＰＣ鋼より線群の定着部30あるいは各ＰＣ鋼
より線31がせり合って接触するケーブル偏向部32におい
て防食性確保、素線同志の微動腐食（フレッチングコロ
ージョン）の防止を目的とした部分的な防食材の充填を
前記部分にて行う場合がある。なお外ケーブルの場合、
通常各ＰＣ鋼より線は、例えば亜鉛メッキ、エポキシ樹
脂又はＰＥ被覆、又はこれらの組み合わせにより自己防
食機能を有し、図に示す自由長部分29の部分では防食材
充填の必要がない。2. Description of the Related Art When a multi-strand cable composed of a PC steel strand group is used as an outer cable, as shown in FIG. In the contacting cable deflecting portion 32, there is a case where partial filling of the anticorrosive material is performed in the portion for the purpose of ensuring anticorrosion property and preventing fine movement corrosion (fretting corrosion) between the wires. For the outer cable,
Generally, each PC steel stranded wire has a self-corrosion function by, for example, galvanizing, epoxy resin or PE coating, or a combination thereof, and it is not necessary to fill the material with the anticorrosion material in the free length portion 29 shown in the figure.
【０００３】同様に自己防食機能（ＰＣ鋼より線に亜鉛
メッキ、エポキシ樹脂被膜、ポリエチレン被覆又はこれ
らの組合わせによる）を有する緊張材からなるケーブル
を斜張橋に用いた場合では、図４（イ）の斜張橋の全図
と（ロ）の主塔側定着部に示すように、主塔33ならびに
主桁34のそれぞれの定着部35，36の鋼線把持部（通常内
側に歯型を有する複数分割された円すい形状のウエッジ
により把持する）を防食するための部分的な防食材の注
入を行なう。Similarly, when a cable made of a tension material having a self-corrosion function (PC steel stranded wire is galvanized, epoxy resin coating, polyethylene coating or a combination thereof) is used in a cable-stayed bridge, as shown in FIG. As shown in the whole view of the cable-stayed bridge in (a) and the anchoring part on the main tower side in (b), the steel wire gripping parts of the anchoring parts 35 and 36 of the main tower 33 and the main girder 34 (usually a tooth type inside) Gripping with a plurality of conical wedge-shaped wedges) having partial corrosion prevention.
【０００４】又、図５に示すように斜張橋主塔33にサド
ル部38を有する斜張ケーブルにおいては、防食の目的の
みではなく、左右主桁からのアンバランス張力によるケ
ーブルの滑動を避ける目的で主桁施工中、サドル部38
に、例えば高強度モルタル等の摩擦伝達の防止を目的と
した充填材を注入する。なお、ＰＣ鋼より線に自己防食
機能がない場合においては主桁が完成し、各ケーブルの
張力調整を行ったあと、自由長部のケーブルもそれを包
括するように配置されたポリエチレン又はＦＲＰよりな
る保護管との間隙に防食材（通常セメント系モルタル）
を注入する。Further, as shown in FIG. 5, in a cable-stayed cable having a saddle section 38 in the cable-stayed bridge main tower 33, not only the purpose of corrosion prevention but also the avoidance of sliding of the cable due to unbalanced tension from the left and right main girders. Saddle part 38 during main girder construction for the purpose
Then, for example, a filler such as high-strength mortar for the purpose of preventing friction transmission is injected. If the PC stranded wire does not have a self-corrosion function, the main girder is completed, and after adjusting the tension of each cable, the cable of the free length part is also made of polyethylene or FRP arranged to cover it. A protective material (usually cement mortar) in the gap between the protective tube
Inject.
【０００５】[0005]
【発明が解決しようとする課題】これらの例示による特
定部分にはケーブルとこれを保護する外層保護管（鋼
管、ＰＥ管、ＦＲＰ管等）の間隔を充填材で満す必要が
あるが、高張力に緊張されたＰＣ鋼より線は偏向部では
図６に示すように保護管７の片方に圧接し、又定着体出
口部では、図７に示すように外層ＰＣ鋼より線31同志が
せり合う配置となり、特に下向に配置された部分の液密
性確保は困難であった。It is necessary to fill the gap between the cable and the outer layer protection pipe (steel pipe, PE pipe, FRP pipe, etc.) that protects the cable at the specific portion of these examples with a filler, but The PC strand twisted by the tension is pressed against one side of the protective tube 7 at the deflecting portion as shown in FIG. 6, and the outer strand PC strand 31 as shown in FIG. It was a fitting arrangement, and it was difficult to secure liquid tightness especially in the portion arranged downward.
【０００６】上記の液密性確保のため、その一案として
図８に示すような構造が考えられた。例えば、斜張橋の
主塔躯体39の中に鋼管、又はプラスチック管を打設して
端部外側にねじ切りしたサドル偏向部40を形成し、この
サドル偏向部40の出口部41を前記躯体39の外側に突出さ
せ、貫通孔を具えるＰＥ製のスペーサ42を前記内ひろが
りの出口部41に嵌め込み、一方、同数の孔を具えるＰＥ
製のスペーサ43のそれぞれの孔にＰＣ鋼より線44を通
し、次いで前記ＰＥスペーサ42の孔に前記ＰＣ鋼より線
44を通して、更に偏向部40の中を通して、偏向部40の反
対側の出口側から引張り出し、その出口部で図示してい
ないが、ＰＣ鋼より線44に、順にＰＥ製スペーサ42、43
を通して引出し、被数本のＰＣ鋼より線44は主桁部に形
成された定着部において最終的に左右主桁がバランスし
て、主塔躯体39に摩擦力が加わらぬような状態で、ＰＣ
鋼より線44を両側斜下方向の主桁に緊定したのち、サド
ル偏向部40の出口部41に嵌め込まれたＰＥスペーサ42に
対してＰＥスペーサ43を移動させ、両者の端面をねじ等
を用いて接合してその接合面内側に袋部45を形成し、こ
の袋部45にエポキシ樹脂等の止水硬化剤を注入し、その
後サドル偏向部40に防錆等を目的としてモルタル等を充
填するような手法が採られている。しかし、この手法で
はＰＣ鋼より線数が多くなると止水硬化剤が完全に全線
間に充填されず、かつ部分的な充填材の漏れが発生する
ことがあった。In order to secure the above-mentioned liquid tightness, a structure as shown in FIG. For example, a steel pipe or a plastic pipe is placed in the main tower skeleton 39 of a cable-stayed bridge to form a saddle deflecting portion 40 that is threaded to the outside of the end, and the exit portion 41 of this saddle deflecting portion 40 is connected to the skeleton 39. A PE spacer 42 having a through hole protruding outside is fitted into the outlet portion 41 of the inner expansion, while a PE having the same number of holes is provided.
Made of PC steel strands 44 through the respective holes of the spacer 43 made of steel, and then made into the holes of the PE spacer 42 by the strands of PC steel.
44, and further through the deflecting portion 40, from the outlet side on the opposite side of the deflecting portion 40, and at the outlet portion, although not shown, on the PC steel strand 44, the PE spacers 42, 43 in order.
In the fixing part formed on the main girder, the left and right main girders finally balance out and the PC tower stranded wire 44 is pulled out through the PC steel stranded wire 44 in such a state that the friction force is not applied to the main tower body 39.
After tightening the steel stranded wire 44 to the main girder in the diagonally downward direction on both sides, the PE spacer 43 is moved with respect to the PE spacer 42 fitted in the outlet portion 41 of the saddle deflecting portion 40, and both end surfaces are screwed or the like. Bonding is performed to form a bag portion 45 inside the joint surface, and a water blocking curing agent such as epoxy resin is injected into the bag portion 45, and then the saddle deflection portion 40 is filled with mortar or the like for the purpose of rust prevention and the like. The method of doing is adopted. However, in this method, when the number of wires is larger than that of PC steel, the waterproofing agent may not be completely filled between all the wires, and a partial leakage of the filler may occur.
【０００７】一方、複数本のＰＣ鋼より線を止水して通
過させるケーブル定着部の防食方法として、特公平 2-3
7463号公報により貫通孔を有する底版をもつ鋼又はプラ
スチックからなる保護管の底版貫通孔に多数本の前記Ｐ
Ｃ鋼より線を通し、この底版と同数孔あき鋼板又はプラ
スチック板との間に同数孔あき弾性板を介在させ、この
弾性板、鋼板又はプラスチック板に前記ＰＣ鋼より線を
通して、弾性板を底版と鋼板又はプラスチック板との間
で締付け、この弾性板の変形により、各ＰＣ鋼より線と
弾性板の孔が密着して、前記鋼又はプラスチックからな
る管への漏水を防止する構造はすでに知られているが、
多数孔あきの底版と一体の保護管と鋼板との間で弾性板
によって液密部を造る際、斜張橋の場合はすでに説明し
たところから理解されるように、定着部は主塔、主桁の
双方に設置されるため、ＰＣ鋼より線は保護管の液密構
造側から入るときと、出るときがある。保護管の液密構
造側から出るようにするときは、保護管の長さが長いと
底版の貫通孔を通するに多くの時間を要する、つまり作
業性が極めて悪いものとなる。On the other hand, as a method for preventing corrosion of a cable fixing part that allows a plurality of PC steel wires to pass through with water still, it is disclosed in Japanese Patent Publication No.
According to Japanese Patent No. 7463, a large number of Ps are provided in the bottom plate through holes of a protection tube made of steel or plastic having a bottom plate having through holes.
An elastic plate having the same number of holes is interposed between the bottom plate and the steel plate or the plastic plate having the same number of holes, and the elastic plate, the steel plate or the plastic plate is passed through the PC steel strand to make the elastic plate a bottom plate. It has already been known that the structure that tightens between the steel plate and the steel plate or the plastic plate, and the deformation of the elastic plate causes the holes of the PC steel strand and the elastic plate to come into close contact with each other to prevent water leakage to the pipe made of the steel or the plastic. Although it is
When making a liquid-tight part by elastic plates between a protection tube integrated with a multi-perforated bottom plate and a steel plate, in the case of a cable-stayed bridge, as will be understood from the already explained, the anchoring part is the main tower and main girder. Since it is installed on both sides, the PC stranded wire may enter or exit from the liquid-tight structure side of the protective tube. When the protective tube is made to come out from the liquid-tight structure side, if the protective tube is long, it takes a lot of time to pass through the through hole of the bottom slab, that is, the workability becomes extremely poor.
【０００８】[0008]
【課題を解決するための手段】図１は本発明の実施例で
あるが、構成部分を保護管より引出して展開した状態で
示している。図において、１，２はより線間表面金属間
接触を避けるため、充分な剛性を有する厚肉のＰＥ製円
形の第１，第２のスペーサである。その材質はポリプロ
ピレン等でもよく部分液密構造形成のとき、金属もしく
は樹脂製の保護管７の最内側に位置する第１のスペーサ
１の厚みｔ1 は各ＰＣ鋼より線を所定の位置に留めるた
め、十分な剛性を有するように第２のスペーサ２の厚み
より通常厚い。３は部分液密構造形成のとき、第１，第
２のスペーサの間で圧縮され、変形する円とう状の軟質
もしくは超軟質のゴムよりなる弾性封止体であり、その
厚みｔは２cm以上15cm未満である。前記第１、第２のス
ペーサおよび封止体は複数本のＰＣ鋼より線と同数の各
面を通る前記より線の外径より 0.5〜15mm大きい内径の
貫通孔４をそれぞれ対応して具え、また各面の周辺部に
は各面を通る複数本の締付ボルト６の挿入貫通孔５をそ
れぞれ対応して具え、特に第１のスペーサにおいてボル
ト貫通孔は前記ボルトを係合するねじ孔として形成され
ている。ボルト貫通孔の内径は締付ボルトの外径よりわ
ずかに大きい。そして第１のスペーサ、弾性封止体３、
第２のスペーサの外径は保護管７の内径とほぼ等しい
か、わずかに小さく形成される。全ＰＣ鋼より線10に保
護管７の出口端に向って、第１スペーサ、弾性封止体
３、第２スペーサの順で通し、これを保護管７に挿入
し、図示していないがスペーサ１の外周線が保護管７の
内側で係止できるように保護管７の内周面に係合用の段
部を設け、この段部にスペーサ１を位置させ、順に弾性
封止体３、スペーサ２を挿入し、複数のＰＣ鋼より線10
の所定の位置における緊張後、ケーブル軸方向で締付ボ
ルト６を貫通孔５に通し、スペーサ１とスペーサ２を締
付ける。FIG. 1 shows an embodiment of the present invention, in which the components are shown in a state of being drawn out from a protective tube and deployed. In the figure, reference numerals 1 and 2 are thick PE circular first and second spacers having sufficient rigidity to avoid contact between twisted wires and metal surfaces. The material thereof may be polypropylene or the like, and when the partial liquid-tight structure is formed, the thickness t 1 of the first spacer 1 located at the innermost side of the protective tube 7 made of metal or resin is such that the PC stranded wire is retained at a predetermined position. Therefore, it is usually thicker than the thickness of the second spacer 2 so as to have sufficient rigidity. Reference numeral 3 is an elastic sealing member made of soft or super soft rubber that is deformed and deformed between the first and second spacers when the partial liquid-tight structure is formed, and its thickness t is 2 cm or more. It is less than 15 cm. The first and second spacers and the sealing body respectively have through holes 4 having an inner diameter larger than the outer diameter of the stranded wire passing through the same number of surfaces as a plurality of PC steel wires by 0.5 to 15 mm. In addition, the peripheral portion of each surface is provided with a corresponding insertion through hole 5 for a plurality of tightening bolts 6 passing through each surface. Particularly, in the first spacer, the bolt through hole is a screw hole for engaging the bolts. Has been formed. The inner diameter of the bolt through hole is slightly larger than the outer diameter of the tightening bolt. The first spacer, the elastic sealing body 3,
The outer diameter of the second spacer is substantially equal to or slightly smaller than the inner diameter of the protection tube 7. All the PC steel strands 10 are passed through the first spacer, the elastic sealing body 3, and the second spacer in this order toward the outlet end of the protective tube 7, and then inserted into the protective tube 7. A step portion for engagement is provided on the inner peripheral surface of the protective tube 7 so that the outer peripheral line of 1 can be locked inside the protective tube 7, and the spacer 1 is positioned on this step portion, and the elastic sealing body 3 and the spacer are sequentially arranged. 2 insert, multiple 10 strands of PC steel
After the tension at the predetermined position, the tightening bolt 6 is passed through the through hole 5 in the cable axial direction to tighten the spacer 1 and the spacer 2.
【０００９】[0009]
【作用】本発明では２枚の孔あきスペーサと肉厚の封止
体よりなり、保護管を構造体の所定位置に設置して、前
記スペーサ、封止体を複数本のＰＣ鋼より線に比較的容
易に通すことができ、これを保護管に配置して上記スペ
ーサ１とスペーサ２の締付けにより中央に配置された肉
厚の弾性封止体３は横方向にせり出して保護管７の内壁
面との間を密封し、一方、各ＰＣ鋼より線10および締付
けねじ６の周囲を密封し、結果として、各ＰＣ鋼より線
10の保護管７内にある部分は液密に保たれる。According to the present invention, two spacers having holes and a thick sealing body are provided. A protective tube is installed at a predetermined position of the structure, and the spacer and the sealing body are made of a plurality of PC steel strands. It can be passed through relatively easily, and this is placed in the protective tube, and the thick elastic sealing body 3 arranged in the center by tightening the spacer 1 and the spacer 2 projects laterally to the inside of the protective tube 7. Seals between the wall surface and the periphery of each PC steel strand 10 and the tightening screw 6, and as a result, each PC steel strand
The portion of the protective tube 7 within 10 is kept liquid-tight.
【００１０】図２（イ）、（ロ）は小容量外ケーブル
（ノングラウト型）定着部に本発明を適用した実施例を
示す。（イ）は全体図を示し、（ロ）は（イ）における
液密構造部分を具体的に示している。図示のように構造
物本体11の一部に定着ブロック12が一体に形成される
が、定着ブロック12の形成にあたり、一端に環状フラン
ジ13を溶接した保護管７が定着ブロック12の打設時一体
に埋込まれ、そのフランジ13の面13' は定着ブロック12
の面より露出し、このフランジ面13' に後刻挿入される
ＰＣ鋼より線と同数の貫通孔14を具える定着板15が固定
され、保護管７の他端は定着ブロック12の面より突出し
てのびる。16は前記定着板15の各貫通孔14と直線状に貫
通する孔を備える筒状のウエッジ承けであり、その後端
は前記定着板15と孔位置を合わせてそれぞれ固定され、
その先端部で分割されたウエッジ17を圧入できるように
形成される。（イ）の点線丸ａで示した液密構造は
（ロ）に詳細に示される。配置される各ＰＣ鋼より線10
はエポキシ被覆18の上にＰＥ被覆19を施したものであ
る。そして液密構造が形成される位置より先端側でＰＥ
被覆19は剥される。保護管７の出口端より内側に入った
位置の内周面に環状の段部20が形成される。それぞれの
ＰＣ鋼より線10に、予めＰＥ製円形の第１のスペーサ
１、弾性封止体３、ＰＥ製円形の第２のスペーサ２を通
す。スペーサ１，２および弾性封止体３には配置される
ＰＣ鋼より線10と同数の貫通孔がそれぞれ貫通位置に形
成され、またそれぞれの周辺部には締付ボルト６の貫通
孔が形成され、スペーサ１のボルト貫通孔は締付ボルト
を係合するねじ孔として形成される。各ＰＣ鋼より線10
を保護管７の端より管内に引張り込み、ウエッジ承け16
の先端より引出し、ＰＣ鋼より線10の緊張前に第１のス
ペーサ１を保護管７の段部20の位置に移し、順に弾性封
止体３、第２のスペーサを前記第１のスペーサの背後に
移し、各ＰＣ鋼より線10を緊張してウエッジ17をウエッ
ジ承け16に圧入してＰＣ鋼より線10を固定支持して定着
部を形成したのち、締付けボルト６によって第１、第２
のスペーサを締付けて封止体３を変形させる。そのあ
と、前記ＰＣ鋼より線10の定着部を覆って前記フランジ
13を接合面として液密に保護カバー21を被ぶせて防錆材
オーバーフロー口22を除外して密封構造とし、圧縮・変
形した弾性封止体による液密構造形成部分の内側位置で
保護管７にあけた防錆材注入口23よりウレタン樹脂24を
オーバーフローするまで注入して防錆の必要があるＰＣ
鋼より線の定着部等対防錆上十分でない部分を保護す
る。なお図でｂはケーブルの定着部を示し、ｃはケーブ
ルの自由長部を示している。2A and 2B show an embodiment in which the present invention is applied to a small capacity outer cable (non-grout type) fixing portion. (A) shows an overall view, and (B) specifically shows the liquid-tight structure portion in (A). As shown in the figure, the fixing block 12 is integrally formed on a part of the structure main body 11. When the fixing block 12 is formed, the protective tube 7 having the annular flange 13 welded to one end is integrated when the fixing block 12 is placed. Embedded in the surface of the flange 13 of the fixing block 12
The fixing plate 15 having the same number of through holes 14 as the PC stranded wire which is exposed from the surface of the fixing surface and is later inserted into the flange surface 13 'is fixed, and the other end of the protective tube 7 projects from the surface of the fixing block 12. Stretch out. Reference numeral 16 denotes a cylindrical wedge receiving hole that linearly penetrates each through hole 14 of the fixing plate 15, and its rear end is fixed to the fixing plate 15 by aligning the hole positions with each other.
It is formed so that the wedge 17 divided at its tip can be press-fitted. The liquid-tight structure indicated by the dotted circle a in (a) is shown in detail in (b). 10 strands of each PC steel placed
Is an epoxy coating 18 with a PE coating 19 applied. Then, PE is provided on the tip side from the position where the liquid-tight structure is formed.
The coating 19 is stripped. An annular step portion 20 is formed on the inner peripheral surface of the protection tube 7 inside the outlet end. The PE circular first spacer 1, the elastic sealing body 3, and the PE circular second spacer 2 are passed through the respective PC steel strands 10 in advance. The spacers 1 and 2 and the elastic sealing body 3 are formed with through holes of the same number as the PC steel strands 10 arranged at the through positions, and the through holes of the tightening bolts 6 are formed in the peripheral portions of the through holes. The bolt through hole of the spacer 1 is formed as a screw hole for engaging the tightening bolt. 10 strands of each PC steel
From the end of the protective tube 7 into the tube and accept the wedge 16
The first spacer 1 is moved to the position of the step portion 20 of the protective tube 7 before the tension of the PC steel wire 10, and the elastic sealing body 3 and the second spacer are sequentially attached to the first spacer. After moving to the back, tensioning each PC steel wire 10 to press the wedge 17 into the wedge receiving 16 to fix and support the PC steel wire 10 to form the fixing portion, and then the first and second fastening bolts 6
The spacer 3 is tightened to deform the sealing body 3. Then, cover the fixing portion of the PC steel strand 10 with the flange.
A protective cover 21 is covered in a liquid-tight manner with 13 as a joint surface, and a rust preventive material overflow port 22 is excluded to form a sealed structure. PC that requires rust prevention by injecting urethane resin 24 from the rust preventive material injection port 23 opened in the
Protects steel stranded wire anchorages and other areas that are not sufficient for rust prevention. In the figure, b indicates the fixing portion of the cable, and c indicates the free length portion of the cable.
【００１１】本発明は上記のように斜張橋、小容量外ケ
ーブル使用の構造体の定着部ほか適用箇所はひろい。As described above, the present invention is widely applicable to the cable-stayed bridge, the fixing portion of the structure using the small-capacity outer cable, and the like.
【００１２】[0012]
【発明の効果】本発明によれば、ＰＣ鋼より線群よりな
る緊張ケーブルの部分的な防食材の注入を確実にするこ
とができる。特に斜張橋やエクストラドーズト（大偏心
外ケーブル）橋における、主塔のサドル構造に適用すれ
ば、その定着部において簡単にウレタン樹脂やモルタル
を注入することができる。As described above, according to the present invention, it is possible to ensure the partial injection of the anticorrosive material of the tension cable made of the PC steel twisted wire group. Especially when applied to the saddle structure of the main tower in a cable-stayed bridge or an extradosed (large eccentric outer cable) bridge, it is possible to easily inject urethane resin or mortar into the fixing portion.
【図１】本発明の実施例を示す。FIG. 1 shows an embodiment of the present invention.
【図２】本発明を小容量外ケーブルの定着部に適用した
例を示し、（イ）は全体図、（ロ）は（イ）における点
線丸で囲んだ部分を示す。2A and 2B show an example in which the present invention is applied to a fixing portion of a small-capacity outer cable, (A) shows an overall view, and (B) shows a part surrounded by a dotted circle in (A).
【図３】外ケーブル使用の構造体の説明図を示す。FIG. 3 is an explanatory diagram of a structure using an outer cable.
【図４】（イ）は斜張橋の全体を示し、（ロ）は主塔と
おける定着部説明図である。FIG. 4 (a) shows the whole of the cable-stayed bridge, and FIG. 4 (b) is an explanatory view of the fixing section in the main tower.
【図５】斜張橋主塔におけるサドル構造の説明図であ
る。FIG. 5 is an explanatory view of a saddle structure in the cable-stayed bridge main tower.
【図６】複数本のＰＣ鋼より線が偏向部を有する保護管
内において緊張されたとき、片方による状態の説明図で
ある。FIG. 6 is an explanatory view of a state in which, when a plurality of PC steel strands are strained in a protective tube having a deflection portion, one side is used.
【図７】複数本のＰＣ鋼より線が緊張されたとき、定着
体出口部で示す鋼より線同志のせり合いの状態説明図で
ある。FIG. 7 is an explanatory view of a state in which the steel strands are twisted together as shown in the fixing body outlet when the plurality of PC steel strands are strained.
【図８】斜張橋の主塔躯体に形成されたサドル偏向部の
出口部に形成された従来の部分液密構造の例を示す。FIG. 8 shows an example of a conventional partially liquid-tight structure formed at the exit of a saddle deflector formed in the main tower body of a cable-stayed bridge.
１ 第１スペーサ ２ 第２スペーサ ３ 弾性封止体 ４ 貫通孔 ５ 締付ボルト貫通孔 ６ 締付ボルト ７ 保護 10 ＰＣ鋼より線 11 構造物本体 12 定着ブロック 13 環状フランジ 14 貫通孔 15 定着板 16 ウエッジ承け 17 ウエッジ 18 エポキシ被覆 19 ＰＥ被覆 20 段部 21 保護カバー 22 オーバーフロー口 23 注入口 24 ウレタン樹脂 1st spacer 2 Second spacer 3 Elastic sealing body 4 through holes 5 Tightening bolt through hole 6 Tightening bolt 7 protection 10 PC steel stranded wire 11 Structure body 12 Fusing block 13 Annular flange 14 Through hole 15 Fixing plate 16 Accept wedge 17 wedge 18 Epoxy coating 19 PE coating 20 steps 21 protective cover 22 Overflow port 23 inlet 24 Urethane resin
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) E04C 5/12 E01D 11/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) E04C 5/12 E01D 11/04
Claims (2)
線と同数で、前記より線の外径より大きい内径の貫通孔
をそれぞれ具えるとともに周辺部にそれぞれ複数本の締
付ボルトの貫通孔を具える第１のスペーサと弾性封止体
および第２のスペーサの外径を前記保護管の内径とほぼ
等しいか、わずかに小さくし、前記第１のスペーサ、弾
性封止体および第２のスペーサの貫通孔に前記ＰＣ鋼よ
り線を通した状態で、前記保護管内に第１のスペーサ、
弾性封止体、第２のスペーサの順でこれらを挿入し、前
記締付ボルトの貫通孔に締付ボルトを挿入し、前記第１
のスペーサと第２のスペーサを締付けてなることを特徴
とするＰＣ鋼より線群よりなるマルチストランドケーブ
ルの部分液密構造。1. A through hole having the same number as a plurality of PC steel stranded wires to be inserted into a protective tube and having an inner diameter larger than the outer diameter of the stranded wires and having a plurality of tightening bolts at the peripheral portion. The outer diameters of the first spacer having a through hole, the elastic sealing body, and the second spacer are substantially equal to or slightly smaller than the inner diameter of the protection tube, and the first spacer, the elastic sealing body, and the second spacer are provided. In a state in which the PC steel wire is passed through the through hole of the second spacer, the first spacer is placed in the protection tube,
The elastic sealing body and the second spacer are inserted in this order, and the tightening bolt is inserted into the through hole of the tightening bolt.
Partial liquid-tight structure of a multi-strand cable made of PC steel stranded wire, characterized in that the spacer and the second spacer are tightened.
にフランジを具える保護管を埋め込んだ定着ブロックを
形成し、該保護管のフランジの面に複数本のＰＣ鋼より
線と同数の貫通孔を具える定着板を固定し、該定着板の
貫通孔と貫通する貫通孔を具えるウェッジ承けを設け、
一方前記ＰＣ鋼より線と同数で、前記より線の外径より
大きい内径の貫通孔を具えるとともに周辺部にそれぞれ
複数本の締付ボルトの貫通孔を具える第１のスペーサと
弾性封止体および第２のスペーサの外径を前記保護管の
内径とほぼ等しいか、わずかに小さくし、前記第１のス
ペーサ、弾性封止体および第２のスペーサの貫通孔に前
記ＰＣ鋼より線を通した状態で、前記保護管内に前記第
１のスペーサ、弾性封止体、第２のスペーサの順で挿入
し、前記ＰＣ鋼より線をウェッジ承けに通じ、緊張して
ウェッジで固定してＰＣ鋼より線の定着部を形成し、前
記第１のスペーサと第２のスペーサを締付ボルトで締付
け、前記ＰＣ鋼より線の定着部を前記フランジを接合面
として保護カバー被ぶせて密封構造とし、これと前記ス
ペーサ間で圧縮・変形された弾性封止体との間に防錆剤
を注入してしたことを特徴とするＰＣ鋼より線群を用い
た構造物のＰＣ鋼より線群定着部の構造。2. When the structure body is cast, a fixing block having a protection tube having a flange at one end embedded therein is formed integrally with the structure body, and a plurality of PC steel strands are formed on the flange surface of the protection tube. A fixing plate having the same number of through holes is fixed, and a wedge holder having through holes penetrating with the fixing plate is provided.
On the other hand, the first spacer having the same number as the PC steel stranded wire and the through hole having the inner diameter larger than the outer diameter of the stranded wire and the through holes of the plurality of tightening bolts in the peripheral portion are elastically sealed with the first spacer. The outer diameters of the body and the second spacer are approximately equal to or slightly smaller than the inner diameter of the protection tube, and the PC steel stranded wire is provided in the through holes of the first spacer, the elastic sealing body, and the second spacer. Insert the first spacer, the elastic sealing body, and the second spacer in this order into the protection tube in the passed state, pass the PC stranded wire through the wedge holder, and tighten it to fix it with the wedge. A steel stranded wire fixing part is formed, the first spacer and the second spacer are tightened with tightening bolts, and the PC steel stranded wire fixing part is covered with a protective cover using the flange as a joint surface to form a sealed structure. , Compression between this and the spacer Structure interlacing lines fixing portion PC strand structure with the lines PC strand, characterized in that it has by injecting rust agent between the shape and elastic sealing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13277595A JP3462623B2 (en) | 1995-05-01 | 1995-05-01 | Partially liquid-tight structure of multi-strand cable consisting of PC steel strands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13277595A JP3462623B2 (en) | 1995-05-01 | 1995-05-01 | Partially liquid-tight structure of multi-strand cable consisting of PC steel strands |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08302904A JPH08302904A (en) | 1996-11-19 |
| JP3462623B2 true JP3462623B2 (en) | 2003-11-05 |
Family
ID=15089268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13277595A Expired - Lifetime JP3462623B2 (en) | 1995-05-01 | 1995-05-01 | Partially liquid-tight structure of multi-strand cable consisting of PC steel strands |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3462623B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004008620U1 (en) * | 2004-06-01 | 2005-10-13 | Dywidag-Systems International Gmbh | Formation of a corrosion-protected tension member in the region of a deflection point arranged on a support, in particular of an inclined cable on the pylon of a cable-stayed bridge |
| JP4958061B2 (en) * | 2006-03-06 | 2012-06-20 | 株式会社Ｉｈｉインフラ建設 | Replacement method for precast floor slabs for composite girder floor replacement and cast-in-place RC floor slabs for composite girder |
| JP4728262B2 (en) * | 2007-01-15 | 2011-07-20 | 三井住友建設株式会社 | Saddle structure |
| JP5567205B2 (en) * | 2010-03-26 | 2014-08-06 | ファウ・エス・エル・インターナツイオナール・アクチエンゲゼルシヤフト | Sealing mechanism |
| KR101439867B1 (en) * | 2012-12-12 | 2014-09-17 | 주식회사 포스코 | Compact tendon structure and prestressed concrete girder of the same |
| JP6308462B2 (en) * | 2014-04-28 | 2018-04-11 | 鹿島建設株式会社 | Spacer for cable deflection portion in outer cable structure, deflection portion structure and cable arrangement method thereof |
| CN104818674A (en) * | 2015-03-13 | 2015-08-05 | 中交公路规划设计院有限公司 | Suspension bridge unbonded prestressed anchorage corrosion resistant method and structure |
| JP6990616B2 (en) * | 2018-03-30 | 2022-01-12 | 住友理工株式会社 | Fixing structure and fixing method of sliding bearings, intermediary members for fixing sliding bearings |
-
1995
- 1995-05-01 JP JP13277595A patent/JP3462623B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08302904A (en) | 1996-11-19 |
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