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Construction process for back-sloping and jacking curved bridge

A construction technique and curved bridge technology, which is applied to bridges, bridge maintenance, bridge reinforcement, etc., can solve problems affecting the lifting of box girders, achieve safety and reliability, and ensure installation space

Inactive Publication Date: 2012-12-05
CCCC THIRD HARBOR ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims at the problem that the self-weight deviation of the box girder seriously affects the jacking of the box girder on the flat curve during the jacking construction, and provides a construction technology for the reverse slope jacking of the curved bridge

Method used

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  • Construction process for back-sloping and jacking curved bridge
  • Construction process for back-sloping and jacking curved bridge
  • Construction process for back-sloping and jacking curved bridge

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Embodiment Construction

[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0030] see figure 1 , the bridge shown is a prestressed concrete box girder of 4×35 equal height, the front section 119.919m is located on the R=600m flat curve, the rear 20.081m is located on the Ls=80m transitional curve, the flat curve is superhigh by 1.5%, and there is 5.01% longitudinal slope. Bridge piers H1, H2, H3, and H4 adopt a double-rectangular portal pier body with slightly open upper ends, bored pile foundations, piles and columns corresponding, single row of pile diameters connected by a platform. H0 abutment is 25.1mx5.4m, with 10 double-row piles and pile diameter

[0031] Since the bridge is a continuous box-girder bridge with a small-radius curved body, the spatial curve of the bridge is complex. During the process of ja...

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Abstract

The invention discloses a construction process for back-sloping and jacking a curved bridge. The construction process comprises the following steps: (1) through temporary supports which are arranged on the tops of bridge piers of a box girder bridge, after synchronously jacking the bridge piers of the box girder bridge to be jacked, dismounting support bases on each pier to realize arrangement of the temporary supports; (2) using the centre of the support base of the highest bridge pier of the box girder bridge to be jacked, rotating the whole girder body for a given angle to realize the synchronous jacking of the back-sloping proportion of the girder body; (3) cutting off and lifting the pier studs of all bridge piers; and (4) descending the integrally connected girder body to the support bases of the pier studs. According to the construction process for back-sloping and jacking the curved bridge, the safety and the jacking accuracy of the girder structure can be guaranteed during jacking.

Description

technical field [0001] The invention relates to a bridge jacking process, in particular to a reverse slope jacking construction process of a curved bridge. Background technique [0002] With the rapid development of China's economy and transportation, the municipal construction of many cities in China cannot keep up with the needs of production and life development, and the existing urban bridges need to be rebuilt to meet the development needs. The overall jacking technology of existing urban bridges is a new technology developed in recent years. It has the characteristics of short construction period, economical application, low building energy consumption, and guaranteed quality of urban ecological environment. For this reason, it has been more and more widely used. . [0003] For example, Chinese patent application: 200810203080.5 discloses a bridge jacking method, the method is to set a reaction force foundation and a jacking bracket under the bridge superstructure, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
Inventor 伊左林廖玉珍邱湧彬李泽源
Owner CCCC THIRD HARBOR ENG
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