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地震荷载下边坡大变形失稳破坏形式研究
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Study on Failure Forms of Slope with Large Deformation under Seismic Loading
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  • LI Mei1,WU Jindong1,WANG Di2,WANG Bin2†,WAN Yong3,HAN Gaosheng4,CHEN Guanghai5

    LI Mei1,WU Jindong1,WANG Di2,WANG Bin2†,WAN Yong3,HAN Gaosheng4,CHEN Guanghai5

    (1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China; 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071, China; 3.Wuhan Metro Bridge and Tunnel Management Co., Ltd., Wuhan 430062, China; 4.China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430068, China; 5.The Fourth Civil Engineering Co.,Ltd. of CREC Shanghai Group, Tianjin 300450,China)
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    摘要:

    采用物质点法分析边坡失稳破坏模式,通过改变土体参数,确定浅层、中层与深层破坏形式边坡模型,进而分析在考虑土体应变软化模型及不同地震荷载作用下,三种边坡破坏模式的破坏过程和变化规律.研究表明,在静态计算中考虑应变软化时,边坡破坏过程较为复杂,滑体沿着滑面整体滑移后,浅层破坏滑体会持续破坏成碎散块体,中层破坏滑体持续分裂成小块体,深层破坏滑体出现新的层状失效区.动态计算中不考虑应变软化时,地震荷载不改变边坡的破坏形式,但加剧边坡的滑移和变形,且随着地震荷载峰值加速度的增加而增加.在考虑应变软化时,地震荷载峰值加速度的增加会改变边坡破坏形式,摩擦角在这个过程中起着重要作用.研究结果可为边坡治理、预防滑坡提供参考.

    Abstract:

    In this paper, the material point method was used to analyze the failure modes of slope, determine the slope models of shallow, middle, and deep failure modes by changing soil parmeters, and then analyze the failure process and change the law of three failure modes of slope under the consideration of soil strain softening model and different seismic loadings. The research shows that when strain softening is considered in the static calculation, the slope failure process is more complicated. After the sliding body slides along the sliding surface, the shallow failure body continues to break into fragments, the middle failure body continues to split into small blocks, and the deep failure body appears as a new layered failure zone. When strain softening is not considered in the dynamic calculation, the seismic loading does not change the failure modes of the slope but aggravates the slip and deformation of the slope and increases with the increase of the peak acceleration of the seismic loading. When strain softening is considered, the increase of peak acceleration of seismic loading changes the slope failure modes, and the friction Angle plays an important role in this process. The results can provide a reference for slope treatment and landslide prevention.

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引用本文

李梅 ,吴进东 ,王頔 ,王斌 ?,万勇 ,韩高升 ,陈光海 .地震荷载下边坡大变形失稳破坏形式研究[J].湖南大学学报:自然科学版,2024,(9):122~132

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  • 在线发布日期: 2024-10-08
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