| 强震作用下层状岩质斜坡破坏的大型振动台试验研究 |
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| 引用本文： | 邹威,许强,刘汉香,陈龙,王龙.强震作用下层状岩质斜坡破坏的大型振动台试验研究[J].地震工程与工程振动,2011,31(4):143-149. |
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| 作者姓名： | 邹威 许强 刘汉香 陈龙 王龙 |
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| 作者单位： | 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,四川成都610059;中铁二院成都地勘岩土工程有限责任公司,四川成都610031
2. 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,四川成都,610059 |
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| 基金项目： | 国家重点基础研究发展计划项目 |
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| 摘 要： | 以“5.12”汶川地震背景为基础,对不同岩性组合水平层状岩质边坡进行了大型振动台模型试验研究.文中介绍了振动台试验过程,通过对试验现象的观察处理分析,考察了边坡的破坏现象特征、变形破坏模式.实验结果表明,地震力作用下边坡的变形破坏程度、特征以及稳定性不仅与地震波的类型、加载方向、频率、振幅有关,同时还受边坡的岩体性质、...
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| 关 键 词： | 振动台 岩质斜坡 边坡工程 边坡稳定性 物理模拟 |
Large-scale shaking table model test study on failure of layered rocky slope under strong ground motion |
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| ZOU Wei,XU Qiang,LIU Hanxiang,CHEN Long,WANG Long.Large-scale shaking table model test study on failure of layered rocky slope under strong ground motion[J].Earthquake Engineering and Engineering Vibration,2011,31(4):143-149. |
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| Authors: | ZOU Wei XU Qiang LIU Hanxiang CHEN Long WANG Long |
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| Institution: | 1(1.State Key Laboratory of Geological Hazard Prevention and Geological Environment Protection,Chengdu University of Technology,Chengdu 610059,China;2.Chengdu Geological Prospecting and Geotechnical Engineering Co.Ltd of CREEC,Chengdu 610031,China) |
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| Abstract: | Based on the background of "5.12 Wenchuan earthquake",a large shaking-table model test was done to study the horizontal stratified rock slopes with different lithology.The process of shaking table test is introduced in this paper.Through observing,handling and analyzing the testing phenomenon,the failure characteristics and deformation failure of slope were studied.The results show that deformation failure degree,characteristics and stability of slope under seismic force not only have something to do with type,loading direction,frequency and amplitude of seismic ground motion,but also are controlled by some geological factors,such as rock nature,elevation,micro-geomorphology and structural plane of slope.Under the effect of same seismic ground motion,for the same rock slope,the destruction of synthesis of excitations in ZX-direction,X-direction and Z-direction at the slope became stronger successively.When the direction and the amplitude of the excitations were the same,the destruction of 10Hz,15Hz sine wave and natural seismic wave became weaker successively.As the amplitude increased,the destruction degrees of various seismic waves to the slope became stronger.The failure of stratified rock slope was mainly caused on the top,especially at the place close to the slope shoulder,and it was controlled by the layers in the way of tension-shear-slip.Under the same seismic wave,the failure of the slope,which was soft in the upper portion and hard in the lower protion,happened earlier than the slope,which was hard in the upper portion and soft in the lower portion.The rock on the top crept down in pieces under the effect of great amplitude vibration and then the landslide occurred.However,the failure of the slope,which was hard in the upper portion and soft in the lower portion,was sheared and dislocated as a whole after the crack of the rock stratum,and was collapsed finally. |
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| Keywords: | shaking-table rock slope engineering slope slope stability physical simulation |
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