松坪沟地质灾害发育分布及主控因素研究  

Analysis of the Main Controlling Factors of Seismic Geological Disasters in Songping River Basin

作　　者：徐煜 赵其华[1,2] 王旭 XU Yu;ZHAO Qihua;WANG Xu(State Key Laboratory of GeoHazard Prevention and GeoEnvironment Protection(Chengdu University of Technology),Chengdu,Sichuan 610059,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,SIchuan 610059,China)

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),四川成都610059 [2]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《水利与建筑工程学报》2020年第1期22-27,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金面上项目(41272333);国家重点基础研究发展计划(2011CB013501)。

摘　　要：以叠溪地震和汶川地震在松坪沟地区诱发的地质灾害为研究对象,通过野外调查和室内资料分析,重点剖析了地质灾害的的分布特征和主控因素,并得到以下认识:两次地震诱发的地质灾害均沿松坪沟呈带状分布,主要集中在三段斜列式断层附近,其中,叠溪地震地质灾害主要集中在中下游地区,汶川地震地质灾害全区均有分布;松坪沟内地震地质灾害的发育分布主要受控于地形地貌、地层岩性、断裂带性质及与发震断裂的距离、地震活动强度等4个方面,地形越陡,地层岩性风化程度越严重,距活动断层距离越近,地震加速度越大,诱发地质灾害的可能性越高,灾害的规模也越大,危害也越严重;两次地震诱发的地质灾害的分布在平面上有一定的重合,叠溪地震对山体斜坡造成隐蔽性损伤,降低了岩体的强度,为汶川地震诱发地质灾害提供了有利条件。The geological hazards triggered by the Diexi earthquake in 1933 and the Wenchuan earthquake in 2008 were taken as an example in this paper. Through field investigation and indoor data analysis, the main controlling factors of two earthquake-induced geological hazards were analyzed, and the following recognitions were obtained: the geological hazards induced by the two earthquakes are distributed along the Songpinggou, mainly concentrated in the three segments of fault. Among them, the geological hazards induced by Diexi earthquake are mainly concentrated in the middle and lower reaches, and the geological hazards induced by Wenchuan earthquake are all distributed in the basin;the developmental distribution of seismic geological hazards in Songpinggou is mainly controlled by four aspects: topography, stratum lithology, fault zone properties and distance from seism genic faults, and seismic activity intensity. The steeper the slope of the terrain, the more severe the weathering of the formation, the greater the acceleration of the ground motion, the higher the possibility of inducing geological disasters, the bigger the scale, the more serious the harm;the distribution of geological disasters induced by two earthquakes has a certain overlap on the plane. The Diexi earthquake caused damage to the slope rock mass, which reduced the strength of the rock mass and provided favorable conditions for the Wenchuan earthquake induced geological disasters.

关 键 词：地震 地质灾害 分布特征 主控因素 

分 类 号：P694[天文地球—地质学] P642.22