宝成铁路新109隧道改线工程地质选线研究

Study on Line Selection of No. 109 Newly-built Tunnel Relocation Engineering of Baoji-Chengdu Railway

宝成铁路新109隧道改线段受“5．12”汶川特大地震影响，次生地质灾害发育。文中对改线区域内地质条件进行了综合分析，提出了地质选线原则，对不同方案的地质条件进行了综合分析，最终确定采用DK方案。文中并对高烈度山区铁路的勘察设计提出了建议。

Secondary geological disasters occurred in relocation section of Baoji-Chengdu Railway No. 109 Tunnel affected by ＂ 5.12＂ Wenehuan Earthquake. This paper carried out comprehensive analysis on geological condition within the relocation region and puts forward the principle of line section. Through comprehensive analysis on geological conditions of different programs, DK program is finally determined. In addition, this paper puts forward suggestions on survey design of high intensity railway in mountainous areas.