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Soft, hard composite three-leveltraction technique for stay cables and connecting device thereof

A technology of soft and connecting devices for cable-stayed cables, applied in cable-stayed bridges, erection/assembly bridges, bridge forms, etc., can solve the problems of long cable-stayed cables, large traction anchoring force, long traction distance, etc., and achieve high work efficiency , simple operation and simple structure

Inactive Publication Date: 2008-06-11
CCCC SECOND HARBOR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large cable-stayed bridges, due to the long and heavy cable-stayed cables, the long traction distance and large traction and anchoring force during erection, the conventional single soft traction or hard traction process can no longer meet the above construction needs

Method used

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  • Soft, hard composite three-leveltraction technique for stay cables and connecting device thereof
  • Soft, hard composite three-leveltraction technique for stay cables and connecting device thereof
  • Soft, hard composite three-leveltraction technique for stay cables and connecting device thereof

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Embodiment Construction

[0017] The traction and anchorage of the long cable (more than 350m in length) in this embodiment is carried out at the end of the beam, and a three-stage traction process combining soft and hard is adopted. The main procedure is: hanging at the tower end of the cable-stayed cable → installing hard traction at the anchor head at the beam end Device→first-level traction (traction force controlled within 60t)→soft traction device installed at the rear of the hard traction device→second-level traction (traction force controlled within 100t)→third-level traction until anchoring.

[0018] As shown in Figure 1, a tension rod 300 is installed at the end of the anchor head 200 of the cable beam end of the cable stay cable 100, and the hoist 400 steel wire rope 401 traction device carries out the first-level traction beam end anchor head forward, and the hoist machine steel wire rope is fixed on the tension rod 300 superior. . A lifting jig 501 is set at the joint of the tension rod 3...

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Abstract

The invention discloses an inclined cable soft and hard combination three-stage traction process and a connecting device. After an inclined cable is hung at the tower end, a hard traction device stretching rod is connected on the anchor head of the beam end of the inclined cable, to operate the first stage traction of a winch; after the anchor head of the beam end of the inclined cable reaches the hanging shifting angle of the beam end of the inclined cable and a sling is adjusted, the second stage traction is operated to adjust the hanging angel of the beam end of the inclined cable till the stretching rod is anchored; lastly, the third stage traction is operated. The soft traction and hard traction combination construction method of the invention comprises the following steps: a soft traction steel strand is connected on the stretching rod through a soft traction connecting sleeve, the other end of the stretching rod is connected with the anchor head of the inclined cable through a diameter changing head, and the hard traction is operated consecutively after the soft traction is ended. The invention has the advantages that the operation is simple and secure, the working efficiency is high, and the inclined cable soft and hard combination three-stage traction process is the technical innovation of the inclined cable construction process. A traction connecting device matched with the traction process is staged and collocated according to the traction force, the structure is simple, reasonable, simple and effective, and the installation is convenient.

Description

technical field [0001] The invention belongs to the construction technology of cable-stayed bridges, and in particular relates to a traction method and a related connection device for hanging beam ends after hanging cable-stayed tower ends. Background technique [0002] The construction of cable-stayed cable tensioning mainly includes the processes of putting cables on the bridge deck, spreading cables, hanging and tensioning. Among them, the hanging process has the highest technical content, difficulty and risk, and is divided into tower end hanging and beam end hanging. After the tower ends of the existing cable-stayed bridges are hung, the implementation of the beam end hangs is generally soft traction or hard traction to complete the beam end hangs. For large cable-stayed bridges, due to the long and heavy cables, the long traction distance and large traction and anchoring force during erection, the conventional single soft traction or hard traction process can no longer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/04
Inventor 张鸿刘先鹏罗承斌肖文福邓惠斌饶华容武向东
Owner CCCC SECOND HARBOR ENG
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