| 强震作用下多层土质边坡破坏规律与变形特征 |
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| 引用本文： | 张坤,胡新丽,李长冬.强震作用下多层土质边坡破坏规律与变形特征[J].煤田地质与勘探,2011,39(1). |
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| 作者姓名： | 张坤 胡新丽 李长冬 |
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| 作者单位： | 中国地质大学工程学院,湖北,武汉,430074 |
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| 基金项目： | 中国地质调查局基金项目(1212010914036) |
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| 摘 要： | 通过对汶川地震受灾区北川县陈家坝地区的地质灾害调查,根据现场松散土质边坡破坏情况,由工程地质类比法选择了计算模型和地震波,采用岩土弹塑性理论和FLAC3D软件分析了多层土质边坡在动荷载作用下边坡单元的剪切拉伸破坏和剪切应变动力响应规律。研究表明,在水平和竖直地震波联合作用下,地震边坡单元首先在坡体内产生剪切破坏。随着震动时间的增加,剪切破坏单元向坡脚和坡肩处延伸,而在坡肩处主要产生拉破坏,一旦剪切破坏面和拉破坏面贯通,将导致边坡失稳。强震过后边坡坡脚鼓出,坡肩下凹,整个坡体呈弧形破坏。
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| 关 键 词： | 多层土质边坡 强震作用 剪切拉伸破坏 变形特征 FLAC3D |
Failure and deformation characteristic of muiti-layer soil slope under strong earthquake |
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| ZHANG Kun,HU Xinli,LI Changdong.Failure and deformation characteristic of muiti-layer soil slope under strong earthquake[J].Coal Geology & Exploration,2011,39(1). |
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| Authors: | ZHANG Kun HU Xinli LI Changdong |
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| Institution: | ZHANG Kun,HU Xinli,LI Changdong(Engineering Faculty,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | Through investigating geological hazards of Beichuan Chenjiaba town in Wenchuan earthquake disaster areas,according to engineering geologic analogy method,calculating model and seismic wave are chosen reasonably based on the investigation and analysis of the loose soil slope failure,FLAC3D simulation software and rock and soil masses of elastic-plastic theory are adopted to analyze the shear and tension failure law and shear strain dynamic response of the stratified soil element under dynamic load.The study... |
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| Keywords: | multi-layer soil slope strong earthquake shear and tension failure deformation characteristic FLAC3D |
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