黄土地区高速铁路隧道勘测浅谈  

Discussion on Tunnel Survey of High Speed Railway in Loess Region

作　　者：于介[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《高速铁路技术》2016年第1期64-68,共5页High Speed Railway Technology

摘　　要：铁路隧道的勘测阶段,是一个项目从前期方案研究到走向成品设计的重要基础之一。文章结合已有的隧道的勘测经验及黄土台塬、沟壑区中就高陡边坡、深"V"浅埋沟谷、滑坡、错落、陷穴及溜坍等特点,通过在银西高速铁路隧道外业勘测,就前期踏勘隧道选线,外业调查及资料收集的一些体会,特别是对高速铁路黄土隧道的洞口不良地质选线、洞口黄土边坡稳定性调查、黄土湿陷性、地表浅埋黄土沟谷及高含水率黄土层等勘测特殊问题,归纳总结了区别于常规铁路隧道勘测要点及注意事项,其关于黄土区高速铁路隧道洞口、黄土湿陷性及高含水率黄土段等勘测要点可直接为黄土地区高速铁路隧道工程勘测服务。The survey stage of railway tunnel engineering is an important ibundation ol a project Irom the earty stuay to the product design. Combined with the existing tunnel survey experience, the features of loess platform and hilly areas like deep ＇ V＇ gully, landslide, dislocation, sink hole and topsoil slip, in the field survey of tunnel on Yinchuan-Xining high speed railway, for the special problems like unfavorable geology route selection of loess tunnel entrance, the loess slope stability investigation in tunnel entrance, collapsibility of loess, the surface shallow buried loess valleys and loess layer with high moisture content, this paper summarized the key points and matters need attention of tunnel survey data collection points about high speed railway tunnel portal different from the conventional railways, among which the survey points about loess area high speed railway tunnel portal, collapsibility of loess and loess section with high moisture con-tent, etc. can directly serve high speed railway tunnel engineering survey.

关 键 词：高速铁路 隧道 黄土 洞口 湿陷性 高含水率 勘测 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]