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Cantilever construction method for arch rib bridge girder

A construction method and cantilever technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of unbalanced load ends, prone to misplacement and leakage of slurry at joints, and many technical difficulties.

Active Publication Date: 2017-09-01
CCCC THIRD HARBOR ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of the main girder is complex, with many technical difficulties, and the joints of each segment are prone to misalignment and grout leakage; during the concrete pouring process, it is easy to have unbalanced load at both ends

Method used

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  • Cantilever construction method for arch rib bridge girder
  • Cantilever construction method for arch rib bridge girder
  • Cantilever construction method for arch rib bridge girder

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Embodiment Construction

[0077] The present invention will be further described below in conjunction with accompanying drawing.

[0078] see first figure 1 , the arch rib bridge is set with two main piers 100, 100' and two side piers 200, 200', the bridge between the middle two main piers 100, 100' is the main bridge, and the upper part of the main bridge adopts the arch beam combination system - new Moon arch structure 30; the two main piers 100, 100' and the two side piers 200, 200' are solid rectangular piers, and the piles are connected to the platform foundation; the main beam is a variable-height prestressed concrete continuous box girder, and the The five-chamber straight web form of the box, the roof of the box girder is provided with a two-way 2% transverse slope; the two sides of the No. No. box girder segment 10, and set a mid-span closing section 11 and two side-span closing sections 11'.

[0079] see again Figure 2 to Figure 10 , the cantilever construction method of arch rib bridge g...

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Abstract

The invention discloses a cantilever construction method for an arch rib bridge girder. The cantilever construction method comprises the following working procedures that firstly, zero box girder sections are constructed; secondly, first box girder sections are constructed; thirdly, second box girder sections to eighth box girder sections are subjected to cantilever casting continuously and symmetrically; fourthly, ninth box girder sections are subjected to cantilever casting symmetrically, and side span cast-in-place section supports are erected; fifthly, tenth box girder sections and side span cast-in-place sections are subjected to cantilever casting symmetrically; sixthly, side span closure sections are constructed; and seventhly, middle span closure sections are constructed. According to the cantilever construction method for the arch rib bridge girder, cantilever casting is constructed through hanging baskets, it can be guaranteed that the left and right sides of the bridge are constructed simultaneously and symmetrically, and a favorable condition is provided for linear control of the bridge; and the construction period can further be effectively shortened, working efficiency is improved, the risk is reduced, and the potential safety hazard of a lower channel in the crossing position is reduced furthest.

Description

technical field [0001] The invention relates to a cantilever construction method of a main girder of an arch rib bridge. Background technique [0002] The main girder of the arch rib bridge consists of one main span and two side spans, two main piers and two side piers are set, the main bridge is between the two main piers in the middle, and the upper part of the main bridge adopts the arch-beam combination system-crescent arch structure . The main pier is a solid rectangular pier, and the pile group is connected to the platform foundation. The main girder is a variable-height prestressed concrete continuous box girder, and the cross-section adopts the form of a single-box five-chamber straight web, and the top plate of the box girder is set with a two-way 2% transverse slope. On both sides of the No. 0 box girder segment on the two main piers, the No. 1 box girder segment to the No. 10 box girder segment are respectively arranged, and a mid-span closing section and two si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 陈国平吕显鸫林雪聪徐家琦
Owner CCCC THIRD HARBOR ENG
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