窄板沟坡面泥石流形成机理与演化过程分析

Analysis on the formation mechanism and evolution process of debris flow at zhaibangou

坡面泥石流爆发突然、破坏力强、预测困难,在暴雨或特大暴雨的激发下常成群发生,危害极大。基于窄板沟坡面泥石流现场调查与分析,结合发生泥石流的3个基本条件进行了该泥石流形成机理及演化过程的探讨。初步分析该坡面泥石流形成机理及演化过程为:在强降雨的作用下首先局部饱和,逐步孕育滑动,再到加速滑流,直至堆积的一个过程,共分为6个阶段,并给出了相应的防治措施建议,为今后类似区域防灾减灾积累一定的经验。

The slope debris flow is sudden,destructive and difficult to predict,It often occurs in groups under the stimulation of rainstorm or super rainstorm,which is very harmful.Based on the field investigation and analysis of the debris flow at Zhaibangou,the formation mechanism and evolution process of the debris flow are discussed in combination with the three basic conditions of debris flow.The preliminary analysis of the formation mechanism and evolution process of the debris flow on the slope is as follows:under the action of heavy rainfall,the debris flow is firstly partially saturated,and then gradually breeds sliding,and then accelerates the sliding,and finally accumulates,which can be divided into six stages.At the same time,the corresponding prevention and control measures are proposed,which can accumulate some experience for similar areas in the future.