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研究目的:河流峡谷地段,不良地质极为发育,规模大,又为地下水的排泄区,发育区域性暗河;线路设计同时受技术标准、投资影响;控制选线的因素极为复杂。本文以渝怀线乌江峡谷地质选线研究为例,对经受施工、运营、汶川地震检验,证明合理的地质选线的经验、成果进行研究、归纳、总结,指导类似河流峡谷地段铁路勘察设计工作。研究结论:先期进行河流左、右岸地质选线;峡谷段不良地质极发育,线路方案受地质条件控制,有条件时,线路内移避开沿岸不良地质;线路绕避不良地质困难或代价极高时,只要地质探明,工程措施到位,线路完全可以通过不良地质;根据岩溶发育规律及暗河标高,宏观指导选线,线路最好尽量选择通过岩溶发育安全带。
Research purposes: In the valley of gorges, the unhealthy geology is extremely developed, large in scale and the drainage area of groundwater, developing the regional underground river; the design of the line is affected by both technical standards and investment; and the factors controlling the route selection are extremely complicated. This paper takes Wuhu Gorge geological route selection research of Yuhuai line as an example to study and summarize, summarize and guide the experiences and achievements of geological route selection under construction, operation and Wenchuan earthquake, . The conclusions are as follows: The geological selection of the left and right bank of the river is carried out in advance; the adverse geologic development of the gorge section is extremely developed; the scheme of the line is controlled by the geological conditions; when conditions permit, the line is shifted inwards to avoid the bad geology along the coast; As long as the geological exploration, engineering measures in place, the line can completely through the adverse geological; according to karst law of development and underground river elevation, macroscopical guide line, the best line as far as possible through the development of kelp seat belt.