Multipoint synchronous push construction method for porous large-span continuous steel truss girder

Abstract

The invention discloses a multipoint synchronous push construction method for a porous large-span continuous steel truss girder, which comprises the following steps of: (1) assembling a steel truss girder assembling platform and a push slideway in a shoreside bridge pier position; (2) assembling a section of steel truss girder and a guide girder on the steel truss girder assembling platform; (3) installing a vertical jack for carrying out support conversion on the steel truss girder and then installing a continuous push jack, a steel strand and an electrohydraulic integrated control system; (4) operating the electrohydraulic integrated control system for carrying out push operation on the steel truss girder; and (5) after the push operation of the section of steel truss girder is finished, continuously assembling the steel truss girder on the steel truss girder assembling platform, carrying out next push operation, repeating the step for circulating operation and finishing the push construction of the porous large-span steel truss girder. The invention has the advantages of short construction period, safe construction, quality guarantee, low cost, and the like, realizes the push operation of the large-span steel truss girder, saves the construction cost, and reduces the pollution to a river channel.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a multi-point synchronous jacking construction method of a porous large-span continuous steel truss girder. Background technique [0002] my country's infrastructure construction is further accelerated, and more and more projects need to be constructed, especially more and more railway steel truss bridges. The erection of steel truss girders must adopt new technology and new technology in order to achieve the goal of ahead of schedule. [0003] At present, the erection of long-span steel truss beams generally adopts the construction methods of cantilever assembly and segmental hoisting, dragging, and pushing. The disadvantage of cantilever assembly construction is that the construction period is long, the investment of equipment is large, the quality of steel truss girder erection is difficult to guarantee, and the safety risk in construction is relatively...

AI Technical Summary

Problems solved by technology

The disadvantage of cantilever assembly construction is that the construction period is long, the investment of equipment is large, the quality of steel truss girder erection is difficult to guarantee, and the safety risk during construction is relatively large

Segment hoisting requires large-scale mechanical equipment for transportation and lifting, and the existing steel truss girder dragging and pushing construction is limited to using the existing railway longitudinal girder as a full-length continuous slideway, which requires that the force of the slideway cannot If the span is too large, the jacking span cannot be too large, and for the orthotropic slab deck without longitudinal beams, there are no longitudinal beams available, so jacking construction cannot be carried out

For the construction of long-span porous continuous girder steel truss beams without longitudinal girders, up to now, there is no economical, fast, safe and quality-guaranteed construction method

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