瓦斯沟至康定段铁路崩塌落石灾害发育分布规律研究

Research on Development and Distribution Rules of Railway Collapse and Rockfall Disasters in Vasigou-Kangding Section

瓦斯沟-康定段铁路崩塌落石灾害突出,严重威胁下部铁路施工及后期运营安全,同时也为铁路选线带来了巨大困难。为探究该区域崩塌落石灾害发育分布规律,本文根据遥感解译、无人机航拍和实地调查,从灾害的高程、坡度坡向、坡体结构和断层距离四个方面,采用贡献率法分析灾害分布规律。研究结果表明,高程主要分布在2000~2500 m,坡度坡向优势方向为245°∠58°,平面分布主要沿瓦斯沟两岸分布,坡体结构主要是似层状顺向坡,与断层相距2 km为敏感区域。此研究结果可为川藏铁路选线提供一定的依据和科学参考。

The conspicuous railway collapse and rockfall disasters in Vasigou-Kangding section seriously threaten the safety of substructure railway construction and later operation,and also bring great difficulties for railway location.In order to explore the development and distribution rules of collapse and rockfall disasters in the area,through remote sensing interpretation,aerial photography with Unmanned Aircraft System and field investigation,the distribution rules of disasters by the contribution rate method from four aspects:elevation,slope aspect,slope structure and fault distance are analyzed in the paper.The research results show that the elevation is mainly within 2000~2500 m,the slope in a predominant direction is 245°∠58°,the disasters are mainly distributed along both banks of the Vasigou in plane,the slope structure is mainly a stratiform-like dip slope,and the sensitive area is 2km away from the fault.The research results can provide a certain basis and scientific reference for the Sichuan-Tibet Railway location.