摘要
以京杭运河扬州段典型堤坝为例,利用极限平衡分析法、地震拟静力数值分析法和地震动力数值分析法计算分析地震作用下堤坝的稳定性,分析这三种方法计算分析地震作用下堤坝稳定性得到的结果的差异及产生差异性的原因,评价该段堤坝地震作用下的稳定性。结果表明:在天然工况下堤坝稳定性状态良好,在基本地震动工况处于明显不稳定状态,可能出现明显局部塑性破坏,罕遇地震动工况下处于严重不稳定状态,可能会出现垮塌性破坏。该研究为河湖堤坝的地震灾害预测提供依据,也为今后类似地区地震作用下堤坝的稳定性分析计算提供借鉴。
Taking the typical dykes and dams on the Grand Canal Yangzhou segment as example,using three methods of limit equilibrium analysis,seismic pseudo-static numerical analysis and seismic dynamic numerical analysis to compute and analyze the stability of dykes and dams under earthquake action,then analyzed difference from the results obtained and the causation of difference,assessed stability of dykes and dams in the segment under earthquake action.The result has shown that the stability of dykes and dams is good under natural mode;obviously unstable state under basic earthquake actions,may appear obvious local plastic failure;seriously unstable state under rarely occurred earthquake actions,may appear collapsed failure.The study can provide basis for dykes and dams earthquake disaster prediction,and provide reference for stability analysis and computation of dykes and dams under earthquake action in similar areas.
作者
邹凯
袁宝远
肖衍
Zou Kai;Yuan Baoyuan;Xiao Yan(School of Earth Science and Engineering,Hohai University,Nanjing,Jiangsu 211100)
出处
《中国煤炭地质》
2018年第3期59-64,共6页
Coal Geology of China
关键词
堤坝稳定性
极限平衡
拟静力数值
动力数值
综合分析
stability of dykes and dams
limit equilibrium
pseudo-static numerical value
dynamic numerical value
comprehensive analysis
