Research on the impact of high-speed railway operation on the lower culvert stability of municipal pipelines

Abstract

An urban natural gas high-pressure pipeline culvert is located below the subgrade of a high-speed railway passenger train ring line. Due to the loads generated by the operation of high-speed railway trains, the pipeline may be deformed or even damaged, causing safety accidents. Therefore, its research is of great significance. Based on the field survey and design data, FLAC3D was used to construct a high-simulation 3D mechanical model, and the deformation and stress state of the rock and soil around the lower natural gas pipeline culvert caused by high-speed railway train operation was calculated. The results show that after the operation of the high-speed railway train, the stress on the pipeline structure does not reach the ultimate strength, and the deformation of the pipeline culvert and surrounding rock and soil is small, which will not affect the use of natural gas pipeline culverts and the normal operation of high-speed railway lines. The research results provide references for the normal use of natural gas pipeline culverts and the safe operation of high-speed railways.