A method for unloading a convenient beam when passing under a high-speed railway road-bridge transition section

Abstract

The application belongs to the technical field of railway engineering construction and maintenance, and provides a method for unloading a convenient beam when passing under a high-speed railway bridge transition section. The longitudinal stability of the high-speed railway abutment is improved by erecting a convenient beam on the side of the high-speed railway abutment away from the underpass structure. Through the implementation of the convenient beam, the original uniform load acting on the subgrade is transformed into a concentrated force acting on the pile foundation of the high-speed railway bridge and the bored pile, thereby reducing the additional lateral force on the pile foundation of the high-speed railway bridge. To achieve the role of unloading. Through the implementation of the convenience beam pile foundation, the load from the upper convenience beam is transmitted to the depth of the foundation, reducing the unbalanced load caused by the train load, thereby reducing the impact of the underpass construction on the abutment of the high-speed railway. The application not only reduces the unbalanced load caused by the train load behind the abutment, but also increases the vertical load of the high-speed railway bridge, both of which are beneficial to the horizontal deformation of the abutment. Moreover, the construction speed is fast, which ensures the safety and stability of the high-speed railway during the underpass construction.

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...

AI Technical Summary

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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