| 洞坪水库大沟湾滑坡体变形机制 |
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| 引用本文： | 项伟,江洎洧,唐辉明,崔德山,黄玲.洞坪水库大沟湾滑坡体变形机制[J].地球科学,2009(5). |
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| 作者姓名： | 项伟 江洎洧 唐辉明 崔德山 黄玲 |
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| 作者单位： | 中国地质大学工程学院; |
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| 基金项目： | 中国地质调查局“鄂西恩施地区滑坡形成机制与危险性评估”项目(No.1212010640604) |
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| 摘 要： | 大沟湾滑坡是瞿家湾滑坡群中相对高差最大的滑坡体,洞坪水库蓄水后滑坡体产生了较大变形且变形机制表现出一定的特殊性.野外调查研究表明:蓄水前该滑坡体稳定性良好;蓄水至452m后,滑坡后缘堆积体与基岩交界处产生贯通滑坡两侧冲沟的连续裂缝,剪出口位于整个滑体中部580m高程附近,由于下部坡体的抗滑作用而使整个坡体仍处于稳定状态;蓄水至488m后,从整个滑体前缘到570m高程附近又形成另一滑坡体,与先前上部滑坡呈梯级分布,分析得出大沟湾滑坡为上部牵引-下部推移的复合式滑坡,两个滑坡共同作用导致整个滑体发生明显变形.分析并利用FLAC3D模拟再现整个变形过程,对滑坡体变形破坏机制做出了很好解释.
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| 关 键 词： | 洞坪水库 大沟湾滑坡 有限差分法 变形机制 复合滑坡 |
Deformation Mechanism of Dagouwan Landslide in Dongping Reservoir |
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| XIANG Wei,JIANG Ji-wei,TANG Hui-ming,CUI De-shan,HUANG LingFaculty of Engineering,China University of Geosciences,Wuhan,China.Deformation Mechanism of Dagouwan Landslide in Dongping Reservoir[J].Earth Science-Journal of China University of Geosciences,2009(5). |
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| Authors: | XIANG Wei JIANG Ji-wei TANG Hui-ming CUI De-shan HUANG LingFaculty of Engineering China University of Geosciences Wuhan China |
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| Institution: | XIANG Wei,JIANG Ji-wei,TANG Hui-ming,CUI De-shan,HUANG LingFaculty of Engineering,China University of Geosciences,Wuhan430074,China |
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| Abstract: | Based on engineering survey and experiments,slide mass structure and the mechanical parameters of Dagouwan landslide were obtained.FLAC3D was employed to analyze the stability and the deformation mechanism of Dagouwan landslide at different working conditions and water levels.The results of analysis show that:when the water level rose to 452 m,there showed a continuous crack at the back of the landslide from one side of gully to another,and the shear outlet of the landslide was located in the thick deposits... |
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| Keywords: | Dongping reservoir Dagouwan landslide FDM method deformation mechanism complex landslide |
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