A Method for Determining the Structure Thickness of Ballasted Track High-Speed ​​Railway Subgrade

Abstract

The invention relates to a method for determining the thickness of a high speed railway bedding structure of a ballast track. The method mainly comprises the steps of determining the wheel loading force of the adjacent sleeper and the average pressure of the left side of the bottom of a sleeper 3 based on the normal distribution curve; considering the vertical diffusion of the wheel loading force of one sleeper side (left side) right below a wheel, the stress of a position right below the center of the sleeper bottom (left side), diffused obliquely by the wheel loading force of the other sleep side (right side), and the stress of a position right below the center of the sleeper bottom (left side), diffused obliquely by the wheel loading force of the bottoms of the left side and the right side of the adjacent sleeper, so as to obtain the relation of the total load stress of the vehicle in a depth position right below the wheel at left side and the depth and further obtain the thickness of the bedding structure. The method has simplicity in calculation and accurate result, thus further ensuring the service life of the railway and the safety operation of a train, and also reducing the railway repairing and maintaining costs and preventing waste.

Description

technical field

[0001] The invention relates to the technical field of railway engineering, in particular to a method for determining the thickness of a ballast track high-speed railway bed structure. Background technique

[0002] The load on the railway subgrade refers to the stress acting on the subgrade surface, including the static load of the weight of the track structure on the subgrade surface and the dynamic load transmitted to the subgrade surface through the wheels and tracks during the operation of the train. It is an important factor in determining the subgrade structure. in accordance with. In high-speed railways, as the train speed increases, the amplitude of continuous dynamic load on the subgrade will increase significantly, and the load characteristics of the subgrade will also change significantly, resulting in an increase in subgrade deformation. The post-construction settlement requirements of high-speed railways are more stringent, so higher requirement...

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