Pushing construction method of single-line railway steel truss bridge utilizing guide beam

Abstract

The invention discloses a pushing construction method of a single-line railway steel truss bridge utilizing a guide beam. The pushing construction method comprises the following steps: (1) establishing a fixed supporting bent frame group; (2) setting up an assembling platform above fixed supporting bent frames; (3) establishing two temporary supporting bent frames; (4) assembling a steel truss bridge section by section and connecting the guide beam with the front end of the steel truss bridge; (5) driving the guide beam and the assembled steel truss bridge to move forward through a wheel moving box; (6) jacking the steel truss bridge through a jack mounted on a bridge pier; (7) driving the guide beam and the steel truss bridge to move forward at the same time through the wheel moving box; (8) connecting the wheel moving box on the temporary supporting bent frames with the steel truss bridge and dismounting the temporary supporting bent frames; (9) finishing pushing of the steel truss bridge; meanwhile, dismounting the two temporary supporting bent frames. According to the pushing construction method provided by the invention, used equipment is simple and convenient; in a construction process, noises are small and influences on the environment are small; normal navigation of a river channel is guaranteed.

Description

technical field [0001] The invention relates to the technical field of steel truss bridge construction, in particular to a push construction method for a single-track railway steel truss bridge using a guide beam. Background technique [0002] With the rapid and steady growth of the country's economic construction and the vigorous development of infrastructure construction, the spanning capacity of railway steel bridges has continued to increase in recent years, and the number of constructions of long-span railway bridges has also continued to increase. With the continuous development and utilization of materials, more and more bridges adopt steel structures, and steel truss bridges have broad market prospects and high added value. [0003] At this stage, the jacking method of small and medium-span steel truss bridges has been relatively mature, but the installation of long-span truss beams is still full of difficulties. In the middle, due to the stress characteristics of t...

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Problems solved by technology

[0003] At this stage, the jacking method of small and medium-span steel truss bridges has been relatively mature, but the installation of long-span truss beams is still full of difficulties. In the middle, due to the stress characteristics of the truss beam structure, the state of the large cantilever, the force of some fulcrums is quite large and highly concentrated, the track setting is difficult, and the construction period is tight and the construction process is complicated. In order to ensure the traffic capacity of the river, the middle of the river cannot Temporary buttresses are set up to increase the difficulty of construction

The traditional guide beam assembled with universal rods still adopts the traditional vertical cross-section, and the lower deflection value of the lower chord is too large, which will also increase the difficulty of the upper pier

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