成渝客运专线主要工程地质问题及地质选线

Major Engineering Geological Problems and Geological Route Selection of Chengdu-Chongqing Railway

成都至重庆客运专线跨成都平原、川中平缓低褶带及川东高褶带,区内地形地质条件复杂,本线重大工程地质问题有煤矿采空区、石材采空区、岩溶及岩溶水、浅层天然气等,严重地制约了铁路选线与重大工程设置的可行性。文章在充分总结西南复杂艰险山区铁路地质选线经验的基础上,提出了高速铁路地质选线定线原则。根据这些原则本线共绕避煤矿采空区5座、石材采空区2处,优化线位5段,最大限度降低了岩溶及岩溶水、浅层天然气对铁路工程的影响,地质选线效果显著,可为后续在相似地质环境下新建高速铁路勘察提供借鉴。

Chengdu-Chongqing Passenger Dedicated Line crosses Chengdu Plain, gentle and low fold belt in Central Sichuan and high fold belt in East Sichuan, where the terrain and geological conditions are complex. The major engineering geological problems of the line include the coal mine goaf, stone goaf, karst and karst water, and shallow natural gas, which seriously restrict the feasibility of the railway route selection and the setting of major project. On the basis of fully summarizing the experience of railway geological route selection in the complex difficult and dangerous mountainous area of Southwest China, this paper puts forward the route selection and alignment principle of high-speed railway. According to the principle, the line bypasses 5 coal mine goafs, 2 stone goafs, and the locations of 5 sections are optimized in the line, which minimizes the influence of karst and karst water and shallow natural gas on railway engineering. The geological route selection effect is significant, which can provide reference for the survey of new high-speed railway in similar geological environment.