黔张常铁路岩溶发育规律研究

摘要

Located in carbonate rock region, the route scheme of Qianjiang-Zhangjiajie-Changde Railway was influenced mainly by the karst topography. This paper summarized and analyzed the developement pattern of the karst in this region, by means of data collecting, interpretation of remote sensing image, geological survey, drilling, geophysical prospecting and so on, in order to provide reliable evidences for railway route selection. The achievements of above-mentioned study reveal that:the main factors affecting the development of the karst include the lithological characteristics, geologic structure, topography and landform, etc. Further on, based on the devolopment pattern of the karst, the development dgrees of the karst along the railway line was divided into several zones, and finally the optimum route scheme of this railway was able to be obtained through comprehensive comparison and selection.%黔张常铁路地处碳酸盐岩区，岩溶是影响线路方案的主要因素。通过收集资料、遥感判释、调查、钻探、物探等勘察方法，对区域内岩溶发育规律进行总结、分析，为铁路选线提供可靠依据。根据工作成果，影响岩溶发育的主要因素包括岩性、构造和地形地貌等，通过分析岩溶发育规律，可划分出沿线的岩溶发育程度分区，综合比选得出线路最优方案。