汶川县连山大桥泥石流的发育特征及危险性评价  

Development characteristics and risk assessment of Lianshan bridge debris flow in Wenchuan county

作　　者：彭春梅[1] 向兵[2] 王玉蕊[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]四川省地质工程勘察院,成都610072

出　　处：《工程勘察》2015年第3期45-50,共6页Geotechnical Investigation & Surveying

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.

关 键 词：泥石流 发生条件 动力学特征 易发程度 危险性评价 

分 类 号：P642.23[天文地球—工程地质学]