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Rapid circulation construction method for upper structure of superposed beam cable-stayed bridge

A construction method and rapid cycle technology, applied in the direction of cable-stayed bridges, bridges, bridge materials, etc., can solve the problems of increasing construction costs, cracking of wet joints, etc., and achieve the effects of saving time, improving construction progress, and improving construction efficiency

Active Publication Date: 2020-10-13
ROAD & BRIDGE INT +2
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AI Technical Summary

Problems solved by technology

[0004] The above method (1) consumes a lot of time and cost because it needs to wait for the wet joint concrete strength to reach the design strength section by section; method (2) is likely to cause cracking of the bridge deck and wet joints on the front steel girder section, and in order to avoid this situation Appeared, it is necessary to "over-stretch first, and then return to the position to relax" on the stay cables, but this will increase the construction cost

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  • Rapid circulation construction method for upper structure of superposed beam cable-stayed bridge

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Embodiment Construction

[0020] Such as figure 1 Shown, concrete construction method of the present invention is as follows:

[0021] (1) Installation of the beam section in the cable tower area: first, according to the conventional construction method, construct the bridge pier and the cable tower, install the steel beam section in the cable tower area, lay the bridge deck on the steel beam section, pour the wet joints of the bridge deck, tension Stay cables; assemble the bridge deck crane on the outermost girder section of the cable tower area;

[0022] (2) Cantilever beam section installation: Use the deck crane to lift the first steel beam section of the main girder cantilever, and weld or bolt it to the beam section where the bridge deck crane is located; The bridge deck is installed on the first beam section of the cantilever; after the installation of the beam section is completed, the stay cables are installed and tensioned for the first time, and then the deck crane moves forward to the firs...

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Abstract

The invention provides a rapid circulation construction method for an upper structure of a superposed beam cable-stayed bridge. The construction method comprises the following steps: firstly, continuously hoisting front four steel beam sections of a main beam cantilever, mounting a bridge deck on each beam section during connection, moving a bridge deck crane forwards to the forefront beam section, pouring wet joints of bridge decks of the other three beam sections at one time, and secondarily tensioning stay cables for a reverse sequence of the three beam sections; and then carrying out threebeam section construction every time according to the method till that all the cantilever beam sections are installed. Compared with an existing section-by-section installation method, by using the method of the invention, a construction progress can be improved; and compared with an existing method that wet joints of all beam sections are poured at the same time and the stay cables are tensionedin sequence, by using the method of the invention, a cracking risk of bridge decks and the wet joints can be avoided, cost is saved, and construction quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and relates to a superstructure construction of a superimposed girder cable-stayed bridge, in particular to a rapid circulation construction method for the superstructure of a superimposed girder cable-stayed bridge. Background technique [0002] The main girder of a composite girder cable-stayed bridge mainly includes a steel girder and a concrete bridge deck laid on the top of the steel girder. The steel girder and the bridge deck are connected by a shear bond to form a stressed whole. The steel girder itself can be used as both the construction skeleton and the permanent load-bearing member. The concrete deck can replace the orthotropic steel deck in the expensive all-steel girder type, so the composite beam is compared with the general steel structure deck system. More economical and faster to build than concrete girders. [0003] The steel girders of the composite girder cable-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D21/10E01D11/04E01D101/30
CPCE01D11/04E01D21/00E01D21/10E01D2101/30
Inventor 吴乾坤张亚海董道福郭宝圣易汉斌王磊
Owner ROAD & BRIDGE INT
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