Main Engineering Geological Problems and Geological Route Selection in Mountainous Area of a Railway in Southeast Gansu
The geological conditions in the West Qinling Mountains in Southeast Gansu are complex,and the tectonic activities such as faults and folds are strong.The railway construction is faced with many engineering geological problems such as landslide,dangerous rock falling,conglomerate karst,and active fault,which seriously restricts the trend of railway.To guide railway route selection,principles for geological route selection in mountainous areas have been proposed based on detailed investigation.Combined with the specific line scheme,through the analysis of the actual geological conditions,considering the engineering setting and construction safety risks and other factors,after comparing the routes of the three-section mountain-crossing,the schemes with less impacts from engineering geological problems,such as passing through the side of the conglomerate karst influence area,shortening the length of the route through the Tertiary red layer,and avoiding landslides and high dangerous rocks and falling rocks,were selected.The research results of this paper have reference significance for railway route selection under similar geological conditions in western Qinling Mountains.
West Qinling mountainsgeological route selectionprinciple of line selectionengineering geological problemsconglomerate karst
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