基于动力计算的震区水库土石坝稳定性及安全评价研究  

Study on Stability and Safety Evaluation of Earth Rock Dam of Reservoir in Earthquake Area Based on Dynamic Calculation

作　　者：张毅 陈敬江 ZHANG Yi;CHEN Jing-jiang(Guizhou Water Resources and Hydropower Survey and Design Research Institute Co.Ltd.,Guiyang 550002,China)

机构地区：[1]贵州省水利水电勘测设计研究院有限公司,贵阳550002

出　　处：《水利科技与经济》2023年第6期6-10,15,共6页Water Conservancy Science and Technology and Economy

摘　　要：以土石结构坝体为主的震区水库抗震能力较差,而当前的拟静力法难以直观反映坝体整体和局部破坏情况。通过非线性分析方法进行动力计算,以评价震区水库土石坝的稳定性。结果表明,该方法在大变形计算模式下得到的震陷率为3.89%;通过对坝顶震陷、坝坡抗震稳定性和坝体抗震稳定性方面分析后可知,在永久变形较大情况下,坝体明显变形,动力剪切破坏明显,与震区水库土石坝的实际情况相符,可为土石坝抗震设计提供参考与借鉴。The anti-seismic capacity of reservoirs in earthquake areas mainly composed of earth rock structure dams is poor,and the current quasi-static method is difficult to directly reflect the overall and local damage of dams.In order to evaluate the stability of earth rock dam of reservoir in earthquake area,the nonlinear analysis method is used for dynamic calculation.The results show that the seismic subsidence rate obtained by this method under the large deformation calculation mode is 3.89%.After analyzing the seismic subsidence of the dam crest,the seismic stability of the dam slope and the seismic stability of the dam body,it is concluded that the dam body is significantly deformed and the dynamic shear failure is obvious under the condition of large permanent deformation,which is consistent with the actual situation of the earth rock dam of the reservoir in the earthquake area,and provides a reference for the seismic design of earth rock dam.

关 键 词：动力计算 水库 土石坝 稳定性 

分 类 号：TV641[水利工程—水利水电工程] TV698