强震条件下巨型滑坡滑带碎裂机制物理模拟研究  

Formation Mechanism and Stability Evaluation of Soft Rock Collapse on Shattered Slope

作　　者：马艳波 MA Yanbo(Sichuan Institute of Geological Engineering Investigation Group Co.,Ltd.,Chengdu 610072,China)

机构地区：[1]四川省地质工程勘察院集团有限公司

出　　处：《成都大学学报（自然科学版）》2019年第3期326-330,共5页Journal of Chengdu University（Natural Science Edition）

基　　金：国家自然科学基金(40972195);“十二五”国家科技支撑计划(2011BAK12B03);四川省科技创新团队(2011JTD012)资助项目

摘　　要：汶川地震诱发了大光包滑坡,其特征独特倍受关注.通过野外调查、勘探测试和室内试验等对该滑坡滑带的岩体碎裂特征进行分析,结合振动台模拟试验还原滑带岩体地震中裂化情形,对强震巨型滑坡滑带碎裂机制做了一定程度的理论分析和试验验证,得出滑带岩体损伤碎裂化是内因外因综合作用的结果,为地震荷载诱发岩体内部缺陷动态演化的累进过程.模拟试验效果较好,生动再现损伤过程,揭示地震致滑带岩体碎裂机制,相比单一的理论分析更为有效.Wenchuan earthquake induced Daguangbao landslide,and its unique characteristics have attracted much attention.Through outdoor investigation,exploration test,and indoor test and so on,this article has done a thorough analysis of the fragmentation features of sliding belt rock masses.Combined with the shaking table simulation test to restore the rock mass damage process in the seismic loads,the rock masses fragmentation mechanism has been theoretically analyzed and experimentally confirmed in sliding belt about the giant landslide in the strong earthquake to a certain extent.It is concluded that damage and fragmentation of rock masses in the sliding belt is the result of the internal and external factors,and is the progressive process of the dynamic evolution of the internal faults induced by seismic loads.The simulation test has a good effect,re-shows the damage process vividly,and reveals the earthquake-induced fragmentation mechanism of rock masses in the sliding belt,which is more convincing than a pure theoretical analysis.

关 键 词：汶川地震 岩体损伤 碎裂机制 物理模拟 

分 类 号：P642.22[天文地球—工程地质学]