大理至丽江铁路软土发育区综合选线研究  

Research on Comprehensive Line Selection of Dali-Lijiang Railway in Soft Soil Region

作　　者：杨文辉[1] 杨英[1] 蒋良文[1] 和佳良[1] 刘伟[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2014年第2期7-10,47,共5页Journal of Railway Engineering Society

摘　　要：研究目的:大丽铁路必经洱海、鹤庆、丽江盆地及盆地之间的低中山区封闭洼地、沟谷,这些地区软土分布广、层次多、厚度大。大理、鹤庆、丽江及其走廊带,环境极为独特、敏感,地质复杂,深大活动断裂发育,地震频繁、震级大、烈度高。本文对软土地质、环境复杂山区铁路综合选线进行研究,寻求选择绕避软土广、深、厚发育带并有利于建设资源节约、环境友好型铁路方案。研究结论:(1)区域地质构造、新构造运动控制盆地及其软土发育分布,构成盆地轮廓或者边缘的断裂构造带对软土发育分布有重要的控制作用,盆地内靠近主要断裂一侧软土厚度大、性状差,影响选线结果;(2)综合研究推荐选择软土地质条件相对较好的洱海东岸、鹤庆盆地东线、丽江盆地东侧靠山及短距离通过小洼地的方案,绕避软土长度大于76.162 km,符合建设资源节约、环境友好型铁路的要求;(3)本文研究成果对软土地质、环境复杂山区工程勘察选址和选线具有借鉴价值。Research purposes： Dali -Lijiang Railway must pass through Erhai, Heqing, Lijiang basin, closed depression and gully of low - middle mountains between these basins, in these areas, soft soil is widely distributed, multi -level, big thickness. In Dali, Heqing, Lijiang and its corridor, environment is extremely unique and sensitive, geological conditions are complex, large active faults are developed, earthquakes are frequent, earthquake magnitude is great, earthquake intensity is high. This paper which makes research on comprehensive line selection for soft soil geology and environment complex mountain railway, aims to select route scheme of avoiding the soft soil wide, deep, thick zones and building a resource saving, environment friendly railway project. Research conclusions： （ 1 ） The regional geological structure, new tectonic movement control basin and development and distribution of soft soil. these fault zones of forming basin edge or contour play important role in controlling the development and distribution of soft soil. On the side near the main fault zone of the basin , thickness of soft soil is large, characters of soft soil are bad, and all these factors effect line selection and result of line selection. （2） These route schemes, which comprehensive research recommended, selected the east coast of Erhai, east line of Heqing basin, east of Lijiang basin near mountains and through small depressions short distance, soft soil geological conditions are relatively good, soft soil length greater than 76. 162 km is avoided, the construction resources saving, environmental friendly railway requirements are met. （3） This research provides reference value for engineering site selection and line selection in mountain regions of soft soil development and complex environment.

关 键 词：区域地质构造 高原断陷盆地 软土发育与分布 环境 综合选线 

分 类 号：U212.22[交通运输工程—道路与铁道工程]