Electing method for side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge

Abstract

The invention discloses an electing method for a side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge, which belongs to the erection field of the suspension bridge. In order to solve the problem of safety risk existing in the erection process of the existing side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge and in a temporary consolidation dismantling and horizontal force conversion process, the electing method comprises the following steps of: (1) forming a cable-stayed bridge of a middle tower and a girder suspended by a side tower; (2) closing the girder; (3) erecting a side tower cable lifting system; (4) dismantling a suspension section support; (5) adjusting a cable-stayed backstay, a suspension cable and a cable-stayed bridge; and (6) finishing the bridge. In the electing method, the construction working procedure of construction and dismantling of the temporary consolidation between the side tower and the girder is cancelled and the construction working procedure of ''side tower cable lifting system erection'' is carried out after all closure openings of are closed, thereby shortening the construction period, saving material consumption and cost of machinery one-shift and avoiding security caused by removing the temporary consolidation bearing strong horizontal force.

Description

technical field [0001] The invention relates to the field of erection of cable bridges, in particular to a side-span suspension-mid-span cable-stayed three-tower self-anchored composite cable bridge with temporary consolidation setting, reasonable closing, system conversion and safe formation between the side towers and the main girder. The general construction method of the bridge. Background technique [0002] With the advancement of science and technology and the rapid development of the national economy, a large number of bridges with complete functions and beautiful shapes have been built. Side-span suspension-mid-span cable-stayed three-tower self-anchored composite cable bridge [1] The structure is novel, the shape is unique, and the line is smooth and beautiful. Compared with the self-anchored suspension bridge, it has higher wind resistance stability [2-3] , and compared with the cable-stayed bridge, the height of the middle tower is reduced, and it has many advan...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the existing side-span suspension-middle-span cable-stayed three-tower self-anchored composite cable bridge erection process, the temporary consolidation removal and horizontal force conversion process not only requires a large number of jacks, but also requires a long time and high requirements. The procedure is complex and there are certain safety risks. The present invention aims to provide a side-span suspension-mid-span cable-stayed three-tower self-anchored composite cable bridge erection method. The erection method cancels the side tower and the main girder. The construction process of temporary consolidation construction and release during the period, and the construction process of "side tower cable crane system erection" is moved to the closing of all the main girders, so the construction period is shortened, and the cost of materials and mechanical shifts is saved. It avoids the safety risks caused by the temporary consolidation of strong horizontal force, and can ensure that the construction duration of the main girder support of the cable-stayed bridge with the middle tower and the duration of the support or temporary pier of the side tower crane pull the main girder are theoretically not longer than the existing ones. Some overall construction methods

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