Integral pushing erection method for truss girders

Abstract

The invention relates to an integral pushing erection method for truss girders. The method comprises the following steps: splicing the truss girders, and enabling the two spliced truss girders (a left girder and a right girder) to be connected through a horizontal connecting steel pipe so that the integrated truss girders are formed; installing continuous-action jacks, installing a working platform between the two truss girders, and enabling two sides of the working platform to be respectively provided with one continuous-action jack; installing steel strands, enabling at least one steel strand to penetrate through the inside of the continuous-action jack of each side, enabling one ends of the steel strands to be anchored on bridge piers in front of the truss girders, and enabling the other ends of the steel strands to droop naturally; pushing and horizontally moving the truss girders, enabling the truss girders to pass across the bridge piers; and enabling horizontal jacks to be further installed at the tops of the bridge piers so that horizontal movement of the truss girders can be achieved. By the integral pushing erection method for the truss girders, the inverted triangular truss girders can be integrally pulled in place, the assembly difficulty is reduced, safety and efficiency are improved, the horizontal movement alignment is accurate, and butt joint quality of the truss girders is guaranteed.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a truss girder integral push erection method. Background technique [0002] At present, the jacking erection used in the bridge construction method is mainly the single-width single-jack jacking erection method of the truss beam, that is, a jack is installed on each truss main girder, and the jack needs to be removed after each stroke of the jacking is completed. Then reinstall the jack at another position of the truss girder to carry out the next jacking. Such a single-width single-piece jacking erection method cannot realize the continuous jacking of the truss girder and the simultaneous overall jacking of the two truss main girders. shift, especially cannot satisfy the push-up erection of inverted triangular girders with poor self-stability. Contents of the invention [0003] The purpose of the present invention is to overcome the problems existing in the prior art that canno...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems existing in the prior art that cannot meet the simultaneous dragging and pushing erection and lateral movement of the double-width m

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