沪昆客专黄果树至北盘江段地质选线方案研究

Study on Track Alignment in Huangguoshu-Beipanjiang Section of Shanghai-Kunming Passenger Dedicated Line

研究目的:在建沪昆客运专线黄果树至北盘江段位于克地亚坝陵河与北盘江深切的山区,地形地质条件异常复杂,线路方案选择受地质条件的制约较为严重。因此,开展沪昆客专黄果树至北盘江段地质选线技术研究不仅可以最大程度避免线路穿越高瓦斯地层、密集采空区以及岩溶强烈发育地层所带来的工程安全隐患,而且对于地形地质条件复杂的其它山区客专地质选线工作具有一定的指导作用。研究结论:通过对线路各方案的环境地质条件、主要工程地质问题的深入调查、分析,建立起了地质选线评价的GRC模型,确立了地质选线评价指标体系及各指标体系的权重值。利用GRC模型对必选方案进行了评价,CK、C4K、C19K方案分别得分73.3、74.3、73.5分,因此,CK为最后选定线路方案。该方案绕避了大规模的滑坡、错落、坍塌等不良地质体及丙坝煤矿矿区,同时还最大限度地绕避了岩溶强烈发育地层。

Research purposes： The Huangguoshu - Beipanjiang section of the Shanghai - Kunming Passenger Dedicated Line is located in the mountain area deeply cut by Baling River and Beipan River in Kediya, with the complex terrain and geological conditions. The railway alignment is seriously restricted by the geological conditions. Therefore, the study on the railway alignment not only can avoid the hidden trouble of the engineering safety as much as possible when railway passes through the high gas formations, the dense goaf and the stratum with serious development of karst, but also can provide the reference to the high -speed railway alignment in the area with the same or similar geological conditions. Research conclusions：Through the deep investigation and analysis of the environmental geological conditions and the main engineering geological problems of each alignment scheme, the GRC mathematical model was established to evaluate the alignment, and the evaluating index system and their weights for the geological alignment were offered. With GRC model, the optional schemes of CK, C4K and C19K were evaluated and their scores were respectively 73.3, 74.3 and 73.5. So the CK scheme was the final one. With this scheme, the railway keeps away from the unfavorable geological areas of landslide, scatter, collapse and mining area as well as the karst area with serious development.