【摘要】 研究目的:成兰铁路位于印度板块与欧亚板块相互碰撞缝合带附近,"5.12"汶川8.0级强震导致地质灾害频发,地形地质条件呈现出典型的"四极三高"特征。通过认真分析区域地质灾害发育分布特征,结合高烈度地震山区铁路综合选线技术研究,开展地质选线研究,对拟建的地形地质条件相似的川藏、滇藏等铁路建设具有一定的借鉴意义。研究结论:成兰铁路地形地质条件极为复杂,活动断裂、高烈度地震、滑坡、崩塌、错落、岩堆、危岩落石、泥石流、采空区等构成控制线路方案的主要地质问题。地质选线定线原则为:线路应短距离、大角度以简单工程类型通过活动断裂,与活动断裂带傍行地段,应选择位于断层下盘(被动盘)并尽量远离断层;尽量绕避性质复杂、不易处理、集中分布的不良地质地段;应绕避大型采空区。选取了地质条件具有优势的西线方案、经雎水场方案、岷江左岸长隧方案。更多还原

【Abstract】 Research purposes: The Chengdu-Lanzhou Railway is near the collision suture zone of the Indian plate and the Eurasian plate.The "5·12" 8.0 magnitude earthquake in Wenchuan caused the frequent appearance of geological disasters with features of the typical "four extreme and three high" topographical and geological conditions.Through the careful analysis of the development and distribution characteristics of regional geological hazards along the Chengdu-Lanzhou Railway and combined with the integrated railway alignment technology in high intensity earthquake mountain area,the study was done on geological alignment of the railway and it could provide the reference to the construction of the proposed Sichuan-Tibet Railway and the Yunnan-Tibet Railway with similar topographical and geological conditions. Research conclusions:The topographical and geological conditions along the Chengdu-Lanzhou Railway are very complex because of the active faults,high intensity earthquake,landslide,collapse,strewn at random,talus,dangerous rockfall,debris flow and goaf and they may be the control elements for the railway alignment.So the following principles should be followed in the railway alignment: The railway should pass the active fault with short distance and big angle by adopting the simple engineering,and for the area along the active fault,the railway should be built on the lower wall(passive wall) and kept away from the the fault as far as possible,and the railway should pass round the unfavorable geological area where the geological conditions are complex and centrally distributed and it is difficult to treat them.Also the railway should pass round the big goaf.The west line scheme,the Jushuichang scheme and the scheme of the long tunnel on the left of the Min River with better geological condition are chosen.更多还原