多滑动面滑坡变形破坏机理的振动台试验研究  

Shaking Table Test Study on Deformation and Failure Mechanism of Landslide wtih Multiple Slip Surface

作　　者：艾挥 吴红刚 冯文强 陈小云 AI Hui;WU Honggang;FENG Wenqiang;CHEN Xiaoyun(Gansu Transportation Planning Survey and Design Institute（Limited by Share Ltd. ）, Lanzhou 730030,China;China Northwest Research Institute Co. ,Ltd. of CREC,Lanzhou 730070, China;Postgraduate Department, China Academy of Railway Sciences, Beijing 100081,China;China Railway Landslide Engineering Laboratory, Lanzhou 730070,Chin;Western Environmental Geotechnieal and Site Rehabilitation Technology Engineering Laboratory, Lanzhou 730070,China)

机构地区：[1]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030 [2]中铁西北科学研究院有限公司,甘肃兰州730000 [3]中国铁道科学研究院研究生部,北京100081 [4]中国中铁滑坡工程实验室,甘肃兰州730070 [5]西部环境岩土及场地修复技术工程实验室,甘肃兰州730070

出　　处：《防灾减灾工程学报》2018年第1期65-71,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：甘肃省自然科学基金项目(145RJZA068);青海省交通建设科研项目(2010-03);云南省交通建设科研项目(201712)资助

摘　　要：以玉树机场路0#滑坡群第七块堆积滑坡为试验原型,采用4·14玉树地震时收集的地震波为试验的基本动荷载,通过大型振动台试验,研究不同方向分别先后加载时,多滑动面滑坡的渐进性破坏特征。结果表明：多滑动面坡体对地震波峰值加速度的放大效应基本上沿高程的增大,放大效应越明显;地震作用下,多滑动面滑坡的变形破坏发育于坡体浅层滑面,逐渐向坡体深层滑面发展,最终破坏变形是沿坡面浅层部位的滑动破坏;与单滑动面滑坡在地震破坏效应不同的是：多滑动面滑坡在坡体局部出现滑移变形时,不一定引起整体滑移,坡体的变形主要体现出了以浅层滑动面为依附面的坡面变形,并向坡体深层滑面不断牵引的破坏特征。该试验成果较好地揭示了多滑动面堆积滑坡的变形破坏机理,可为多滑动面堆积滑坡的治理提供设计参考。At present,there is a lack of research on the deformation and failure mechanism of earthquake-induced landslides with multiple slip surfaces.In this paper,the seventh landslide of0#landslide group along Yushu Airport Road is regarded as the test prototype,and the seismic wave collected in the＂4·14＂Yushu earthquake is selected as the basic dynamic load.The gradual failure characteristics of multiple slip surfaces under different load directions are studied using large-scale shaking table tests.The test results show that the amplification effect of the slope with multiple slip surfaces on the peak acceleration of seismic wave is more obvious for a higher elevation.Under the action of earthquake,the deformation and failure of the landslide with multiple slip surfaces gradually evolve from shallow to deep slip surfaces.Finally,the deformation and failure of the landslide is along the shallow parts of the sliding mass.The failure modes are different between earthquake-induced landslides with multiple slip surfaces and those with single slip surface.For the former,when there are localized sliding deformation in the slope,overall sliding does not necessarily emerge.Instead,the deformation of the landslide with multiple slip surfaces shows that the shallow sliding surfaces act as attachment,developing to the deeper sliding mass,which reflects the failure characteristics of continuous traction.The results of this experiment reveal the deformation and failure mechanism of landslides with multiple slip surfaces,which can provide useful reference for designing the treatment measures of such landslides.

关 键 词：动力响应 振动台试验 多滑动面 滑坡 

分 类 号：P642.22[天文地球—工程地质学]