摘要
连山大桥泥石流位于四川省汶川县,受汶川地震影响,流域内崩滑产生的松散固体物增多,使泥石流易发程度增大。2013年7月,受连续强降雨的影响,该流域内爆发一系列规模不等的泥石流。通过对泥石流现场调查搜集的资料,对连山大桥泥石流的发生条件以及动力学特征进行具体分析,并对连山大桥泥石流进行了危险性评价,得出如下结论:连山大桥泥石流为暴雨沟谷型泥石流,正处于发展期,表现为极易发、高度危险,在强降雨或余震的影响下暴发泥石流的可能性较大。
Lianshan Bridge debris flow is located in Wenchuan county,Sichuan province.Affected by Wenchuan earthquake,the growing loose deposits give rise to the susceptibility of debris flow.A series of different scales of debris-flows break out in this gully caused by continuous strong rainfalls in July 2013.Based on site investigation,a detail analysis on occurrence conditions and dynamics characteristics of Lianshan bridge debris-flow is conducted,the risk assessment of the debris-flow is performed.Finally,a conclusion is drawn that LIanshan bridge debris flow is a strong rainfall gully type which is under developing stage,highly dangerous,and easily reoccur during strong rainfall or aftershock.
出处
《工程勘察》
2015年第3期45-50,共6页
Geotechnical Investigation & Surveying
关键词
泥石流
发生条件
动力学特征
易发程度
危险性评价
debris flow
occurrence conditions
dynamics characteristics
occurrence level
risk assessment
