| 地震边坡失稳机理及稳定性分析 |
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| 引用本文： | 言志信,张森,张学东,段建.地震边坡失稳机理及稳定性分析[J].工程地质学报(英文版),2010,18(6):844-850. |
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| 作者姓名： | 言志信 张森 张学东 段建 |
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| 作者单位： | 1.兰州大学土木工程与力学学院 兰州 730000; |
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| 基金项目： | 高等学校博士学科点专项科研基金项目(20090211110016); 甘肃省科技计划资助项目(096RJZA048) |
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| 摘 要： | 通过对汶川地震边坡调研,发现大量边坡破坏形式为坡顶拉裂、下部坡体剪切破坏。本文利用有限差分程序,从边坡土体的应力状态出发,通过监测边坡土体的状态、位移和剪应变增量变化等,分析了岩土体在静力、横向地震和耦合地震作用下的破坏过程,发现坡顶附近发生张破坏,以下部位发生剪切破坏,而非传统的地质工程观点——地震边坡破坏主要是地震惯性力造成的剪切破坏。并提出一种新方法——关键点相对位移法,来判断边坡的动力稳定性,数值模拟结果与已有研究成果及震后灾害调查结果具有良好的一致性。
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| 关 键 词： | 边坡工程 地震 破坏机制 关键点相对位移法 动力稳定性 |
| 收稿时间： | 2010-04-20 |
FAILURE MECHANISM AND STABILITY ANALYSIS OF SLOPE UNDER EARTHQUAKE |
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| YAN Zhixin ZHANG Sen ZHANG Xuedong DUAN Jian.FAILURE MECHANISM AND STABILITY ANALYSIS OF SLOPE UNDER EARTHQUAKE[J].Journal of Engineering Geology,2010,18(6):844-850. |
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| Authors: | YAN Zhixin ZHANG Sen ZHANG Xuedong DUAN Jian |
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| Institution: | 1.School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000;2.Key Laboratory of Mechanics on Disaster and Environment in Western China,Ministry of Education,Lanzhou 730000 |
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| Abstract: | Investigation of the slopes in Wenchuan earthquake shows that tension failures mostly appear in the slope crests,and shear failure in slope toe.Beginning with the stress state of soil,using the finite-difference method,the failure process of slope is analyzed under the given conditions of static,horizontal and coupled earthquake by monitoring the changing of state,displacement,and shear-strain increment.The calculated results indicate that the slope crest is tensile damage and shear failure appears in slope... |
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| Keywords: | Slope engineering Earthquake Failure mechanism The relative displacement of key points Dynamic stability |
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