Dynamic Characteristics and Risk Assessment of Debris Flow in Longmen Gully on Chengdu-Kunming Railway
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.
railwayrisk assessmenttheoretical analysisdebris flowindicator system method
NETL
NSTL
万方数据
