EP4006231A1 - Appareil d'ancrage qui s'adapte au mouvement longitudinal de structure et procédé d'installation - Google Patents

Appareil d'ancrage qui s'adapte au mouvement longitudinal de structure et procédé d'installation Download PDF

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Publication number
EP4006231A1
EP4006231A1 EP20847198.7A EP20847198A EP4006231A1 EP 4006231 A1 EP4006231 A1 EP 4006231A1 EP 20847198 A EP20847198 A EP 20847198A EP 4006231 A1 EP4006231 A1 EP 4006231A1
Authority
EP
European Patent Office
Prior art keywords
cable
steel casing
casing tube
guiding pipe
flared steel
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.)
Pending
Application number
EP20847198.7A
Other languages
German (de)
English (en)
Other versions
EP4006231A4 (fr
Inventor
Shunquan Qin
Zongyu Gao
Heng Wang
Wei Xu
Qinfeng Lu
Zhangong FU
Jun Hu
Qinggang ZHENG
Renan YUAN
Shaojun Li
Lanlan FU
Haoqing Zhang
Yulong Li
Ziming ZHOU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Major Bridge Reconnaissance and Design Institute Co Ltd
Original Assignee
China Railway Major Bridge Reconnaissance and Design Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Railway Major Bridge Reconnaissance and Design Institute Co Ltd filed Critical China Railway Major Bridge Reconnaissance and Design Institute Co Ltd
Publication of EP4006231A1 publication Critical patent/EP4006231A1/fr
Publication of EP4006231A4 publication Critical patent/EP4006231A4/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D11/00—Suspension or cable-stayed bridges
    • E01D11/04—Cable-stayed bridges

Definitions

  • the present invention relates to the technical field of bridge anchoring, in particular to an anchoring apparatus that adapts to the longitudinal movement of a structure and installation method therefor.
  • the structural system of cable-stayed bridge is complex and there are many influencing factors.
  • the auxiliary piers set in the side span can reduce the length of the cantilever during construction of the side span and increase the overall stiffness of the structure, so as to reduce internal force of main beam, bending moment of tower bottom, deviation of tower top, vertical deformation of main beam and cable stress, and make the stress of the structure tend to a reasonable state.
  • a connecting rod is often set at the anchor point of the side span cable to connect with the lower auxiliary pier, so that the tension generated by the vertical component of the cable force can be directly borne by the auxiliary pier, which reduces the bending of the side span main beam and greatly improves the stiffness of the main span.
  • the existing anchoring scheme can only be applied to small and medium-sized span bridges with small anchoring force and short longitudinal displacement, and cannot meet the needs of the anchoring of the long-span main beam.
  • the purpose of the present invention is to overcome the deficiency of the existing anchoring apparatus in the above background technology that under the influence of the longitudinal displacement (movement) of the main beam, the cable and the port of the cable sealing tube are subject to a large concentrated cutting force, and if the cable is subject to large concentrated cutting force for a long time, hidden troubles such as wear and fracture are prone to appear, thereby seriously affecting the safety of the anchoring system, so that the present invention provides an anchoring apparatus that adapts to the longitudinal movement of a structure and installation method therefor.
  • the present invention provides an anchoring apparatus that adapts to the longitudinal movement of a structure, comprising
  • circumferential stiffeners and radial stiffeners are arranged between the outer wall of the flared steel casing tube and the inner wall of the cable guiding pipe, wherein the circumferential stiffener is circular, the radial stiffener is long strip, and the circumferential stiffener and the radial stiffener are fixedly connected to the outer wall of the flared steel casing tube and the inner wall of the cable guiding pipe.
  • the number of the radial stiffeners is not less than 8, the radial stiffeners are evenly arranged along the circumference of the outer wall of the flared steel casing tube; the number of the circumferential stiffeners is provided with a plurality, the plurality of the circumferential stiffeners are evenly arranged along an axis direction of the flared steel casing tube; and the inner diameter of the plurality of the circumferential stiffeners gradually increases along the direction away from the cable sealing tube, and a distance between two adjacent circumferential stiffeners is not more than 200mm.
  • the axis of the flared steel casing tube is collinear with that of the cable guiding pipe
  • the inner surface of the flared steel casing tube is formed by a flat curve, composed of a straight line and a circular curve, rotating 360 degrees around the axis of the flared steel casing tube, and the axis distance from the circular curve to the flared steel casing tube is a radius R of the circular curve
  • the inner surface of the flared steel casing tube is provided with a rubber pad, the rubber pad is attached to the inner wall of the flared steel casing tube, and the outer wall of the cable is attached to the rubber pad.
  • the straight line of the flat curve is parallel to the axis of the flared steel casing tube, the length of the straight line is not less than 200mm, and the axial distance from the straight line to the flared steel casing tube is the sum of the radius of the cable, the thickness of the rubber pad and the manufacturing error of 3mm.
  • the straight line of the flat curve is tangent to the circular curve, and the radius of the circular curve is R ⁇ P/q, wherein P is a cable force and q is a radial bearing capacity of the flared steel casing tube; and the length of the circular curve is L ⁇ 2SR/H, wherein S is a longitudinal displacement of the cable and H is a height difference between upper and lower anchor points of the cable.
  • one end of the cable guiding pipe is welded with an anchor backing plate
  • the other end of the cable guiding pipe is welded with an anchor sealing plate
  • both ends of the outer wall of the flared steel casing tube are provided with end circumferential stiffeners
  • the end circumferential stiffeners are welded with the inner wall of the cable guiding pipe
  • the circumferential stiffeners and radial stiffeners are attached to the inner wall of the cable guiding pipe.
  • the flared steel casing tube is located at one end away from the cable sealing tube in the cable guiding pipe, and the flared steel casing tube is located outside the cable sealing tube.
  • the yield strength of structural materials of the flared steel casing tube is not less than 345MPa.
  • An installation method of the anchoring apparatus that adapts to the longitudinal movement of a structure comprising the following steps:
  • the present invention has the following advantages:
  • the embodiment of the present invention provides an anchoring apparatus that adapts to the longitudinal movement of a structure, comprising:
  • the straight line of the flat curve is tangent to the circular curve, and the radius of the circular curve is R ⁇ P/q, wherein P is a cable force and q is a radial bearing capacity of the flared steel casing tube; and the length of the circular curve is L ⁇ 2SR/H, wherein S is a longitudinal displacement of cable 6 and H is a height difference between upper and lower anchor points of the cable 6.
  • the straight line of the flat curve is parallel to the axis of the flared steel casing tube 1, the length of the straight line is not less than 200mm, and the axial distance from the straight line to the flared steel casing tube 1 is the sum of the radius of the cable 6, the thickness of the rubber pad 5 and the manufacturing error of 3mm.
  • the inner surface of the flared steel casing tube 1, formed by rotating 360 degrees around the axis of the flared steel casing tube 1 by a straight line, is the transition section of the longitudinal movement of the cable 6.
  • the cable 6 located within the straight line range of the inner surface of the flared steel casing tube 1 does not move longitudinally, that is, the cable 6 and the port of the cable sealing tube 7 are prevented from being subjected to a large concentrated cutting force.
  • Circumferential stiffeners 3 and radial stiffeners 4 are arranged between the outer wall of the flared steel casing tube 1 and the inner wall of the cable guiding pipe 8, and the circumferential stiffener 3 and the radial stiffener 4 are welded with the outer wall of the flared steel casing tube 1.
  • the number of the radial stiffeners 4 is not less than 8, the radial stiffeners 4 are evenly arranged along the circumference of the outer wall of the flared steel casing tube 1; the number of the circumferential stiffeners 3 is provided with a plurality, the number of the circumferential stiffeners 3 is determined by the length of the flared steel casing tube 1, the plurality of the circumferential stiffeners 3 are evenly arranged along the axis direction of the flared steel casing tube 1; and the inner diameter of the plurality of the circumferential stiffeners 3 gradually increases along the direction away from the cable sealing tube 7, and a distance between two adjacent circumferential stiffeners 3 is not more than 200mm.
  • the present invention relates to an anchoring apparatus that adapts to the longitudinal movement of a structure.
  • the anchoring apparatus is provided with a flared steel casing tube 1 adapted to the longitudinal movement (displacement) of the cable 6 in the cable guiding pipe 8.
  • the inner surface of the flared steel casing tube 1 is formed by a flat curve, composed of a straight line and a circular curve, rotating 360 degrees around the axis of the flared steel casing tube 1.
  • the flared steel casing tube 1 increases the contact area between the outer wall of the cable 6 and the inner wall of the flared steel casing tube 1, thereby preventing part of the cable 6 from being subjected to a concentrated cutting force, and improving the safety of the anchoring system.
  • the anchoring apparatus welds the radial stiffeners 4, circumferential stiffeners 3 and end circumferential stiffeners 2 on the outer wall of the flared steel casing tube 1 according to a setting sequence.
  • the radial stiffeners 4, circumferential stiffeners 3 and end circumferential stiffeners 2 form make the cable guiding pipe 8 and the flared steel casing tube 1 form a whole, thereby significantly improving the structural strength of the flared steel casing tube 1, and improving the durability of the flared steel casing tube 1.
  • the anchoring apparatus is attached to a rubber pad 5 on the inner wall of the flared steel casing tube 1.
  • the rubber pad 5 has good flexibility and wear resistance. When the outer wall of the cable 6 contacts the rubber pad 5, the surface wear of the cable 6 can be significantly reduced and the outer wall of the cable 6 can be protected.
  • the shape and size of the flared steel casing tube 1 are specially designed according to the circular curve section of the flared steel casing tube according to actual engineering requirements.
  • the radius R of the circular curve thereof is not less than the ratio of the cable force P to radial bearing capacity q of the flared steel casing tube; and the length L of the circular curve is not less than twice the longitudinal displacement S of the cable multiplied by the radius R of the flared steel casing tube, and then divided by the height difference H between the upper and lower anchor points of the cable.
  • the size and shape of the anchoring apparatus in the flared steel casing tube 1 are accurately calculated by mechanics, which meets the service performance requirements of the anchoring apparatus.
  • one end of the cable guiding pipe 8 is welded with an anchor backing plate 10
  • the other end of the cable guiding pipe 8 is welded with an anchor sealing plate 9
  • both ends of the outer wall of the flared steel casing tube 1 are provided with end circumferential stiffeners 2
  • the end circumferential stiffeners 2 are welded with the inner wall of the cable guiding pipe 8
  • the circumferential stiffeners 3 and radial stiffeners 4 are attached to the inner wall of the cable guiding pipe 8.
  • the yield strength of structural materials of the flared steel casing tube 1, the end circumferential stiffener 2, the circumferential stiffener 3 and the radial stiffener 4 is not less than 345MPa, so as to improve the radial bearing capacity of the anchoring apparatus.
  • the present invention provides an installation method of the anchoring apparatus that adapts to the longitudinal movement of a structure, comprising the following steps.
  • the cable guiding pipe 8 is composed of a near anchor section and a far anchor section.
  • the near anchor section is one end close to the cable sealing tube 7, and the far anchor section is one end away from the cable sealing tube 7.
  • the cable guiding pipe 8 is divided into the near anchor section and the far anchor section to facilitate the welding of end circumferential stiffeners 2 with the cable guiding pipe 8.
  • the flared steel casing tube 1 is processed according to a designed flat curve, the radius R of the circular curve of the flared steel casing tube 1 is not less than the ratio of the cable force P to radial bearing capacity q of the flared steel casing tube.
  • the length L of the circular curve is not less than twice the longitudinal displacement S of the cable multiplied by the radius R of the flared steel casing tube, and then divided by the height difference H between the upper and lower anchor points of the cable.
  • An anchor backing plate 10 is welded at one end of the cable guiding pipe 8 close to the cable sealing tube 7, and an anchor sealing plate 9 is welded at the other end of the cable guiding pipe 8 away from the cable sealing tube 7.
  • the cable 6 is threaded through the inside of the cable guiding pipe 8 for tensioning, so as to realize the connection between the main beam and the auxiliary pier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
EP20847198.7A 2019-07-26 2020-05-19 Appareil d'ancrage qui s'adapte au mouvement longitudinal de structure et procédé d'installation Pending EP4006231A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910682688.9A CN110485253B (zh) 2019-07-26 2019-07-26 一种适应结构纵移的锚固装置及安装方法
PCT/CN2020/091010 WO2021017581A1 (fr) 2019-07-26 2020-05-19 Appareil d'ancrage qui s'adapte au mouvement longitudinal de structure et procédé d'installation

Publications (2)

Publication Number Publication Date
EP4006231A1 true EP4006231A1 (fr) 2022-06-01
EP4006231A4 EP4006231A4 (fr) 2023-08-02

Family

ID=68548529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20847198.7A Pending EP4006231A4 (fr) 2019-07-26 2020-05-19 Appareil d'ancrage qui s'adapte au mouvement longitudinal de structure et procédé d'installation

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Country Link
EP (1) EP4006231A4 (fr)
CN (1) CN110485253B (fr)
WO (1) WO2021017581A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN110485253B (zh) * 2019-07-26 2021-08-24 中铁大桥勘测设计院集团有限公司 一种适应结构纵移的锚固装置及安装方法
CN114580063A (zh) * 2022-03-09 2022-06-03 中铁大桥勘测设计院集团有限公司 一种基于斜拉桥辅助墩分阶段调整的施工控制方法

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DE2135999C3 (de) * 1971-07-19 1981-07-16 Hein, Lehmann AG, 4000 Düsseldorf Führung eines Zuggliedes
JP2909233B2 (ja) * 1991-02-12 1999-06-23 神鋼鋼線工業株式会社 ケーブルの支持装置
JP4212957B2 (ja) * 2003-05-28 2009-01-21 オリエンタル白石株式会社 Ｐｃ橋の外ケーブル定着部における真空ポンプ併用グラウト注入工法
JP2005171604A (ja) * 2003-12-10 2005-06-30 Anderson Technology Kk Ｐｃ構造物の外ケーブルの防食構造
CN1268818C (zh) * 2004-08-18 2006-08-09 上海市隧道工程轨道交通设计研究院 用于管段接头的钢拉索的连接方法
KR101546844B1 (ko) * 2013-07-17 2015-08-24 (주)태성에스엔아이 케이블의 정착장치
CN204455824U (zh) * 2015-02-11 2015-07-08 中铁第四勘察设计院集团有限公司 一种斜拉桥索梁连接锚拉板组件
CN205171369U (zh) * 2015-12-05 2016-04-20 中交通力建设股份有限公司 一种pc梁斜拉桥索梁锚固构造
CN108004907A (zh) * 2018-01-26 2018-05-08 西安市政设计研究院有限公司 一种格构式钢桁架塔斜拉桥钢拉索锚固系统
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CN110485253B (zh) * 2019-07-26 2021-08-24 中铁大桥勘测设计院集团有限公司 一种适应结构纵移的锚固装置及安装方法

Also Published As

Publication number Publication date
CN110485253A (zh) 2019-11-22
CN110485253B (zh) 2021-08-24
EP4006231A4 (fr) 2023-08-02
WO2021017581A1 (fr) 2021-02-04

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