Method for treating ballastless track subgrade elevation defects

Abstract

The invention provides a method for treating ballastless track subgrade elevation defects. The method comprises the following steps that S1, the positions and the types of track defects are acquired so as to determine the treatment range; S2, in the treatment range, an adjusting groove is formed below the supporting layer through an underground excavation mode; S3, a track is adjusted to a target elevation; and S4, filling is carried out on the adjusting groove so as to fill the adjusting groove, wherein in the step S2, the adjusting groove extends downwards from the bottom surface of the supporting layer in the vertical direction, the adjusting groove extends in the arrangement direction of the track in the longitudinal direction, and the two sides of the adjusting groove are located outside the corresponding side walls of the supporting layer correspondingly in the transverse direction. According to the method, the economical efficiency is good, and construction can be carried out on the skylight time.

Description

technical field [0001] The invention relates to the technical field of existing railway maintenance engineering, in particular to a method for regulating elevation diseases of ballastless track subgrades. Background technique [0002] In recent years, with the rapid development of high-speed railways, my country has built large-scale high-speed railways, which has brought great convenience to people's travel. The ballastless track has the characteristics of good rigidity uniformity, strong structural durability and less maintenance workload. Therefore, ballastless tracks are generally used for railways with a design speed of 300 kilometers per hour and above, tunnels and tunnel group sections with a length of more than 1 kilometer. [0003] However, the complex geological conditions and huge differences in the natural environment along the high-speed railway make the subgrade often face various unfavorable factors. The complexity of the subgrade soil material is easily affe...

AI Technical Summary

Problems solved by technology

[0003] However, the complex geological conditions and huge differences in the natural environment along the high-speed railway make the subgrade often face various unfavorable factors. The complexity of the subgrade soil material is easily affected by external influences, and elevation changes such as overhanging or settlement may occur

The ballastless track is very sensitive to the smoothness of the foundation, and its self-adjusting ability is limited. The unevenness of the ballastless track caused by the deformation of the subgrade will affect the railway operation

Images