黔桂线改扩建工程几处典型的地质选线

研究目的:黔桂铁路改扩建工程地处西南山区,穿越贵州、广西两省区,沿线地形地质十分复杂,线路方案选择往往受到地质条件的严重制约,因此,在该线改扩建工程初测阶段大力开展区域地质选线工作对节约工程投资、减少地质灾害和工程病害、消除运营隐患是很有必要的。研究方法:在充分收集区域地质资料基础上,通过地质调绘、钻探、静力触探等综合勘探方法,查明选线段重大工程地质问题,从地质角度确定线路方案。研究结果:通过不同方案地质条件必选,最终确定了地质条件好的线路方案。研究结论:西南山区地形地质复杂,线路方案比选中应充分研究沿线地质条件,绕避复杂、严重地质不良地段。本文系统介绍了黔桂线改扩建工程初测阶段几处典型的、成功的地质选线,概括性地总结了地质选线应绕避的重大地质问题,其选线思路、比选条件及评价意见等可作为其它山区铁路勘察设计参考和借鉴。

Typical Examples of Route Selection Based on Geological Conditions for Reconstruction of Guizhou -Guangxi Railway

Research purposes: Guizhou-Guangxi Railway locates in mountain area of Southwestern China and crosses Guizhou province and Guangxi autonomous region.The topography and geology along the line are very complicated and seriously affects the route selection.Therefore,it is necessary to survey geological conditions widely in the region for route selection on primary survey stage for reconstruction of Guizhou-Guangxi Railway in order to save project cost,(reduce) geological disasters and work hazards,and eliminate potential troubles in operation.Research methods:On the basis of collecting geological information in the region,the route selection program was(decided) from point of geological view through making systematical exploration by means of geological survey,boring and static penetration tests to find out serious problems related to engineering geology.Research results:Through making comparison of geological conditions in different route selection programs,finally the route selection program with better geological conditions was decided.Research conclusions:The topography and geological conditions are very complicated in Southwestern China,so the full investigation of geological conditions along the line should be made so as to avoid complicated and seriously unfavorable geological section in course of route selection.The systematical introduction is given to several typical examples of route selection based on geological conditions on the primary survey stage for reconstruction of Guizhou-Guangxi Railway,and the brief discussion is made on avoiding serious geological trouble in course of route selection.The thoughts,(comparison) conditions and evaluation opinions introduced in this paper route selection can be used for reference to the survey and design of other mountain railways.