摘要
Abstract
Ya'an-Lugu Highway passes the Xigeda Strata at Lama Stream,Wenwu Slope,Hanyuan County,subject to adverse engineering geological properties.There are many gullies formed due to long-term water erosion on slope surface in this river basin.As a result of large vertical slope,loose sidewall,rich solid matters and serious erosion,debris flow is possible to arise when induced by rainstorm,affecting the highway construction and operation directly.Based on the surveys,the formation conditions of debris flow at Lama Stream were analyzed,the flow rate,impact force and total amount calculated,and the proneness of the debris flow evaluated.The results show that the debris flow at Lama Stream is stormy and watery so that under corresponding design probability,the outbreak scale is small with small flow rate and in the form of water and soil loss basically.Thus it is recommended to adopt some prevention and control measures.关键词
泥石流/形成条件/运动特征/易发性/防治措施Key words
debris flow/ formation conditions / motion characteristics/ proneness/ prevention and control measures分类
交通工程
