地震作用下边坡及滑坡稳定性及破坏过程分析  被引量:1

Stability and failure process analysis of slope and landslide under earthquake action

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作  者:李兆宇 马宗源[2] 魏睿真 焦凯 LI Zhaoyu;MA Zongyuan;WEI Ruizhen;JIAO Kai(Sinohydro Bureau 3CO.,LTD.,Xi’an 710024,China;Institute of Geotechnical Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区:[1]中国水利水电第三工程局有限公司,陕西西安710024 [2]西安理工大学岩土工程研究所,陕西西安710048

出  处:《西安理工大学学报》2023年第1期125-132,共8页Journal of Xi'an University of Technology

基  金:国家自然科学基金资助项目(51979225)。

摘  要:基于土动力学基本理论、显式有限元及大变形计算方法,本文提出了一种适用于边坡及滑坡在地震条件下的稳定性及失稳破坏过程的分析方法。通过本研究期望为边坡工程抗震及地震诱发滑坡次生地质灾害防治工作提供理论指导。首先使用显式有限差分、隐式有限元及显式有限元法三种方法分别计算了静力条件下的边坡安全系数,将三种方法计算结果进行了对比分析。之后使用本文方法及五种天然地震波分别计算了边坡的地震安全系数并分析了地震动特性对边坡稳定性的影响。最后结合一个工程实例分析了地震条件下滑坡的稳定性及破坏过程。Taken the soil dynamics theory into account,an explicit dynamic and large deformation method for slope stability and progressive failure process analysis under earthquake action is proposed in this paper.The theoretical guidance for the earthquake resistance of slope and prevention of earthquake-induced landslide disaster will be referenced by this study.Firstly,the method for explicit finite difference,implicit finite element and explicit finite element are used to calculate the factor of safety of the slope under static conditions,with the results obtained from the three methods compared and analyzed.Five types of natural seismic acceleration amplitudes are used to calculate the seismic factor of safety of the slope via the method suggested by this study,the influence of the characteristics of earthquakes on the slope stability are analyzed,and the progressive failure process of the slope during the earthquake process is analyzed.Finally,the failure process and failure mechanisms for landslide under seismic conditions are analyzed.

关 键 词:地震 边坡稳定性 滑坡 破坏过程 大变形 显式有限元法 

分 类 号:X43[环境科学与工程—灾害防治]

 

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