Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder

A technology for stiffening box girder and installation method, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of no installation method and no elaboration, etc.

Inactive Publication Date: 2008-07-23
CHINA MAJOR BRIDGE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, concrete-stiffened box girders have begun to be used in ground-anchored suspension bridges, but there are no relevant industry stand

Method used

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  • Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder
  • Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder
  • Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder

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Example Embodiment

[0036] The installation sequence of the present invention is as follows: first symmetrically advance from the mid-span section to the main towers on both sides, and advance from the section near the main tower to the mid-span and abutment. The steps are as follows:

[0037] 1. The concrete structure stiffened box girder adopts the prefabricated erection method in segments. The erection methods include the floating crane 2 erection method shown in Figure 1a and the cable crane 4 erection (winding machine or continuous jack lifting) method shown in Figure 1b. After the flat-bottomed barge 3 loaded with the beam section to be erected is towed by the tug boat to the bridge axis of the predetermined erection position, it is aligned with the lowering lifting point block group of the girder crane, and the floating barge is stabilized with the help of the tug's towing force and anchoring. After checking the connection between the lifting point and the lifting lugs of the beam section, it ...

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Abstract

The invention discloses an installation method of prestressed concrete stiffened box girder for an earth-anchored suspension bridge, relating to an installation method of stiffened box girder for suspension bridge. The installation procedure is that: symmetrically pushing from the segment at mid-span to the main towers at the two sides or pushing from the segment near the main towers to the mid-span and the abutments, the steps are that: the concrete structure stiffened box girder is erected by hoisting, lifting or oscillating-shifting method, the erection of the concrete structure stiffened box girder comprises the pre-assembly of the stiffened girder, the installation of cable clamp and suspender cable, the slung load of catwalks, carrying the stiffened girder to the construction site, the girder erection crane at the position, hoisting, floating and positioning, moving the stiffened girder to the hoisting point and raising perpendicularly, connecting with the segment by drawing off, after the stiffened girder in position, adjusting the alignment of the beam segment, completing the temporary connecting installation between the beam segments, penetrating the longitudinal prestressed steel strands, loading the top surface of the beam blocks, wet connection between the segments, incrementally launching the cable saddle on the top of the tower, locking the cable saddle. The installation method of prestressed concrete stiffened box girder for an earth-anchored suspension bridge has the advantages of ensuring the installation precision and good alignment of the bridge.

Description

technical field [0001] The invention relates to a method for installing a concrete stiffened box girder of a suspension bridge. Background technique [0002] Most of the stiffened beams of modern long-span ground-anchored suspension bridges are steel structures, and less concrete structures are used. In recent years, concrete-stiffened box girders have begun to be used in ground-anchored suspension bridges, but there are no relevant industry standards and specifications in China, nor are there any elaborations, regulations and requirements for this, nor are there specific installation methods. Contents of the invention [0003] The purpose of the present invention is aimed at above-mentioned present situation, aims to provide a kind of can satisfy the installation requirement of the prestressed concrete box girder of ground anchor suspension bridge, guarantee the good alignment of bridge the installation method of prestressed concrete stiffened box girder of ground anchor ...

Claims

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Application Information

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IPC IPC(8): E01D21/00
Inventor 黄支金王吉侠陶建山张启桥邱国平叶李倪勇赵翔郭敏敏
Owner CHINA MAJOR BRIDGE ENG
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