Auxiliary beam unloading method during down-crossing high-speed railway bridge transition section

Abstract

The invention belongs to the technical field of railway engineering construction and maintenance, and provides an auxiliary beam unloading method when down-crossing a high-speed railway bridge transition section. The method that auxiliary beams are erected on the side, away from a down-crossing structure, of a high-speed railway bridge abutment is adopted, and thus the longitudinal stability of the high-speed railway bridge abutment is improved. According to implement of the auxiliary beams, uniform load acting on a roadbed is transformed into focus force acting on the high-speed railway bridge pile foundation and a drilling grouting pile, thus additional lateral force subjected to the high-speed railway bridge pile foundation is reduced, and the action of unloading is achieved. Accordingto implement of an auxiliary beam pile foundation, loading from the upper part auxiliary beams is passed into deep in foundation soil, the unbalance loading action introduced by train load is reduced,thus the influence on the high-speed railway bridge abutment of down-crossing construction is reduced. According to the auxiliary beam unloading method when down-crossing the high-speed railway bridge transition section, unbalance loading introduced by the train load behind the bridge abutment is reduced, the vertical load of a high-speed railway bridge beam is also increased, the two aspects areboth advantageous to the horizontal deformation of the abutment, the construction speed is high, and safety and stability of the high-speed railway during down-crossing construction are guaranteed.

Description

technical field [0001] The application relates to the technical field of railway engineering construction and maintenance, in particular to a method for unloading a convenient beam when passing under a high-speed railway bridge transition section. Background technique [0002] In recent years, with the continuous development of roads and other infrastructure in our country, road engineering inevitably encounters more and more construction problems in construction projects, especially the cross-construction of roads and high-speed railways. The security and stability of the country and the construction of road engineering have brought new threats and challenges. [0003] Most of the existing road underpassing projects in China are box culverts and other structures passing under the operating railway, and when the box culvert and other structures pass under the bridge near the high-speed railway road-bridge transition section, the underpassing project will have a greater impac...

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Problems solved by technology

[0003] Most of the existing road underpassing projects in China are box culverts and other structures passing under the operating railway, and when the box culvert and other structures pass under the bridge near the high-speed railway road-bridge transition section, the underpassing project will have a greater impact on the railway operation. It often forms unfavorable unbalanced loads for high-speed railway pile foundations

[0004] For the unloading of the partial load of the pile foundation of the high-speed railway bridge in the underpass project, there are no effective construction measures in China

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