大理至攀枝花铁路综合地质选线

拟建大理至攀枝花铁路全长约218km,铁路路网组成和地质条件十分复杂,比选方案众多。文章在分析内动力、外动力、特殊岩土介质条件等3种地区域稳定性地质作用类型、特征、影响的基础上,划分出控制方案的区域主要地质问题有"活动断裂及高烈度地震、高地温和高温热水、煤系地层系列地质病害、斜坡变形及泥石流、岩溶、盐岩、破碎玄武岩、高原断陷盆地深厚层软土"等8个方面。在充分汲取相邻铁路工程地质勘察经验、地质研究成果的基础上,提出了精准的方案比选地质意见及可靠的处理措施,确定了大理至攀枝花铁路地质选线核心原则:线路尽量避开或以最短长度通过活动断裂带、煤系地层、盐岩,不以隧道工程通过高地温和高温热水区,或应以傍山浅埋隧道通过。有关结论和建议可供类似工程项目参考。

Comprehensive Geological Route Selection of Dali-Panzhihua Railway

The total length of the proposed Dali-Panzhihua Railway is about 218km.Due to the composition and geological conditions of the railway road network are very complicated,there are multiple schemes.Based on the analysis of the types,characteristics and effects of stability geological action in three areas,such as internal power,external power and special geotechnical medium conditions,the regional major geological problems of the control scheme are"active fracture and high intensity earthquake,highland mild high temperature hot water,coal stratigraphic series geological diseases,slope soil and stone migration,karst,salt rook.Broken basalt,deep layer soft soil in plateau faulted basin",etc.Based on learning the experience and geological research results of the engineering geological survey of adjacent railways,some precise geological opinions and reliable treatment measures for the schemes comparison are put forward in this paper,and the core principle of the geological line selection of the railway is determined;the line tries to avoid or,with tire shortest length,pass through the active fault zone,coal strata,salt rook.It is suggested to adopt the shallow buried tunnel through the area of underground high temperature and hot water.The concdusions and recommendations can be used as reference for similar projects.