成昆铁路龙门沟泥石流动力学特征及危险性评估  

Dynamic Characteristics and Risk Assessment of Debris Flow in Longmen Gully on Chengdu-Kunming Railway

作　　者：鲜一丁 XIAN Yiding(Chengkun Railway Corporation Limited,Chengdu 610036,China)

机构地区：[1]成昆铁路有限责任公司,成都610036

出　　处：《铁道建筑》2024年第8期156-161,共6页Railway Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2021G008)。

摘　　要：成昆铁路及复线均以桥梁形式跨越龙门沟,面临泥石流冲击掩埋风险。针对这一问题,基于现场调查、无人机航拍、遥感解译等方法,揭示了西南复杂山区泥石流分区及物源特征;基于雨洪法开展了百年一遇降雨频率下泥石流动力学参数计算,获取了龙门沟泥石流在成昆铁路及复线处的流速、流量、冲起高度、爬高、整体冲击压力、块石冲击力及一次固体物质冲出量等动力学特征参数;基于指标体系法开展龙门沟风险评估,得到泥石流发生概率及严重程度,从而确定泥石流危险性等级。最后根据研究结果提出了相应的工程防治建议,研究成果可为中国西南山区铁路泥石流风险评价提供参考。The Chengdu-Kunming Railway Line and the Multiple Line both cross the Longmen Gully in the form of bridges,facing the risk of being buried by mudslides.To solve this problem,based on field investigation,Unmanned aerial vehicle photography,remote sensing interpretation and other methods,the zoning and source characteristics of debris flows in the complex mountainous areas of Southwest China have been revealed.Based on the rain flood method,the dynamic parameters of debris flow under the frequency of once-in-a-century rainfall were calculated,and the dynamic characteristic parameters of the Longmen Gully debris flow at the Chengdu-Kunming Railway Line and the Multiple Line were obtained,including flow velocity,flow rate,uplift height,climb height,overall impact pressure,rock impact force,and the amount of solid material washed out once.Based on the indicator system method,the risk assessment of Longmen Gully was carried out,and the probability and severity of debris flow occurrence were obtained,thereby determining the risk level of debris flow.Finally,corresponding prevention and control engineering suggestions were proposed based on the research results,which could provide reference for the risk assessment of railway debris flow in southwestern mountainous areas of China.

关 键 词：铁路 危险性评估 理论分析 泥石流 指标体系法 

分 类 号：U442.3[建筑科学—桥梁与隧道工程]