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Construction method of reinforced concrete multi-span arch bridge or continuous box structure bridge

A technology of reinforced concrete and construction method, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of many longitudinal prestressed cables of continuous box girder structure, limited segment length, slow construction speed, etc. The effect of low cost, lengthened construction section and accelerated construction speed

Active Publication Date: 2015-10-07
CHONGQING BIAOWANG INTEGRATED HOUSING TECH DEV CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the continuous box structure construction of continuous box structure bridges, the "hanging basket" construction technology is usually used. Although this technology does not have high requirements on the longitudinal and axial horizontal bearing capacity of the bridge pier during construction, the process is complicated and the construction speed is slow. The safety risk is relatively high, and the length of each section that can be constructed by the "hanging basket" is limited, which leads to the phenomenon of more longitudinal prestressed cables in the continuous box girder structure

Method used

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  • Construction method of reinforced concrete multi-span arch bridge or continuous box structure bridge
  • Construction method of reinforced concrete multi-span arch bridge or continuous box structure bridge

Examples

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Embodiment 1

[0029] see figure 1 , a method for constructing an arch support of a two-span reinforced concrete multi-span arch bridge, the method is carried out in the following steps:

[0030] Step 1) casting the substructure of the double-span arch bridge on the ground 1 according to the traditional process, including the foundation (not shown in the figure), the middle pier 2, and the abutment 3;

[0031] Step 2) Fix one end of the flexible cable 4 at an appropriate position under the elevation of the arch support 5 on the middle pier 2 of the continuous-span arch bridge. In order to ensure the strength of the flexible cable 4, the flexible cable 4 is made of high-strength steel strand or High-strength steel wire rope. The other ends of the flexible cables 4 are respectively fixed on the ground anchors 7 on the left and right banks along the bridge axis direction, and the ground anchors 7 are fixed on the ground 1 inside the corresponding span to balance the installation and constructi...

Embodiment 2

[0038] see figure 2 , is a construction method for the arch support of a three-span reinforced concrete multi-span arch bridge. The difference between this embodiment and Embodiment 1 is that in this method, the number of piers 2 in the bridge is two. The pier group is formed by fixedly connecting the flexible stay cables 4, and the two ends of the pier group along the longitudinal direction of the arch bridge are provided with reversely extending flexible stay cables 4, and the reversely extending flexible stay cables 4 are fixed on the ground 1 through ground anchors 7; step 3 ), set up a group of arch supports 5 between the two middle piers 2. Other technical features of this embodiment are the same as those of Embodiment 1 and will not be repeated here.

Embodiment 3

[0040] A construction method for the arch support of a continuous box structure bridge. The difference between this embodiment and Embodiment 1 and Embodiment 2 is that in step 3) after the installation of the arch support is completed, it is necessary to set up on the arch support the line shape of the longitudinal section of the continuous box structure. Consistent conventional brackets realize the construction of continuous box structures.

[0041] The present invention is not only limited to above-mentioned embodiment, and in the present embodiment, the construction method of reinforced concrete multi-span arch bridge or continuous box structure bridge with more than three spans can also fix the middle pier of the bridge by flexible stay cable 4 by the method in embodiment 1, Thereby, the superstructure of the bridge can be constructed by cast-in-place integral support.

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Abstract

The invention discloses a construction method of a reinforced concrete multi-span arch bridge or a continuous box structure bridge. The method is implemented according to the following steps: step 1) constructing the lower part structure of the arch bridge, wherein the lower part structure comprises a foundation, a middle pier and a bridge abutment; step 2) fixing flexible cables to piers of the arch bridge, fixing ground anchors through the flexible cables, and fixing the ground anchors to a ground to balance the horizontal force borne by the pier; step 3) erecting arch supports on each span of the bridge; step 4) constructing the upper part structure of the arch bridge on the arch supports; and step 5) removing the flexible cables and the arch supports. The construction method is simple in technology, reliable in quality, low in construction cost and rapider in construction speed, and the safety risk is lowered.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method of a reinforced concrete continuous-span arch bridge or a continuous box structure bridge. Background technique [0002] In the construction of two-span and multi-span continuous arch bridges and continuous box structure bridges, the middle piers often have a considerable height. As the height of the pier increases, the ability of the upper part of the pier body to resist horizontal thrust along the longitudinal axis becomes weaker. This has brought great trouble to the construction of the main arch ring of the arch bridge (whether adopting the arch support cast-in-situ or prefabricated hoisting). [0003] In the continuous box structure construction of continuous box structure bridges, the "hanging basket" construction technology is usually used. Although this technology does not have high requirements on the longitudinal and axial horizontal bearing capa...

Claims

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Application Information

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IPC IPC(8): E01D21/00
Inventor 王华才
Owner CHONGQING BIAOWANG INTEGRATED HOUSING TECH DEV CO LTD
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