A two-way adjustment device for the deformation of the subgrade bed of a ballastless track high-speed railway, its use method and its construction method

Abstract

The invention discloses a two-way adjusting device for the deformation of the subgrade bed of a ballastless track high-speed railway, a method for using it and a construction method. The lower end of the flower tube is located at the bottom of the bed, the grouting port of the flower tube is detachably connected with a sealing cover, and a displacement sensor is also arranged in the bed. The device can be used to perform pressure grouting through the pre-embedded flower pipes, which can improve the settlement deformation, and can reduce the deformation of the upper arch through the pressure relief holes formed by pulling out the pre-embedded flower pipes from the foundation bed, effectively saving the subgrade settlement in the later stage Or the remediation and maintenance costs of arching, reduce the operation risk caused by the deformation of the subgrade, so as to effectively ensure the smoothness, stability and safety of the line operation, and adjust the deformation during the operation period, the construction is convenient, the interference to the high-speed rail operation is small, and it is widely used It is applicable to various types of subgrades and has great promotional significance.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a two-way adjusting device for deformation of a ballastless track high-speed railway subgrade bed, a use method and a construction method. Background technique [0002] High-speed railways, especially ballastless track railways, are very strict in controlling the deformation of subgrade arching and settlement. The adjustment of ballastless track to deformation is mainly realized by track fasteners, but its adjustment ability is weak. Once the arching or settlement deformation exceeds the allowable Limits will seriously affect the operational safety of high-speed railways. Under the dual effects of subgrade load and train dynamic load, the subgrade is usually dominated by settlement deformation, and subgrade settlement deformation may exceed the limit. However, in cutting sections such as expansive rock and soil and red bed mudstone, due to the unloading rheology...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art that lack a device capable of repairing and controlling the deformation of the upper arch and the deformation of the subsidence, and provide a two-way adjustment device for the deformation of the subgrade bed of the ballastless track high-speed railway, its use method and its construction. method

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