西安至平凉线永寿梁越岭地区综合线路方案研究

结合新建铁路西安至平凉线永寿梁越岭地区线路方案研究工程实践,针对新建铁路西安至平凉线黄土沟谷纵横、强烈下切、岸坡坍塌、陷穴分布广、且多呈坡陡谷深的黄土"V"形谷的特殊地形条件,以及以黄土滑坡为主的不良地质广为分布、规模大、危害重的特殊地质条件,首先根据线路基本走向和主要技术标准,在进行大面积区域地质调查和地质勘探基础上,结合区域内自然特征、环境敏感点等,选择合理的越岭垭口;在此基础上,结合地形、地质条件,系统、全面分析控制线路方案的主要因素,从线路技术条件、越岭主隧道长度及工程施工条件、工程可靠性及环境影响、工程经济性等多方面比选,选择合理的越岭隧道方案。

Research of Integrated Route Scheme for Xi'an-Pingliang Railway Passing through Yongshouliang Mountain Region

This thesis researched the route scheme for newly-built Xi'an-Pingliang Railway passing through the Yongshouliang mountain region.The topographic condition of this railway section was so special and bad:there were a lot of V-shaped strongly-incised loess hills and dales with abrupt slope in all directions,accompanied by collapsed bank slopes and widespread sinkholes.Still more,the loess landslides constituted the main unfavorable geological conditions,which were widely distributed with large scale and serious menace.First of all,according to both the route alignment and the main technological standards,based on large-scale geological investigation and survey,a mountain pass for the railway passing through was reasonably researched and determined in combination with the natural features of this mountain region.And then,the main factors dominating the route scheme were comprehensively analyzed in combination with the topography,geological condition and the system.Finally,the reasonable route scheme of passing through the mountain by tunnel was selected through multi-aspect comparisons,such as the route technical condition,the length of the main tunnel which would passes through the mountain,the construction condition,the engineering reliability,the environmental effect,the economical efficiency and so on.