强震区某沥青混凝土面板堆石高坝抗震安全性分析  

Seismic safety of a high asphalt concrete-faced rockfill dam in strong earthquake area

作　　者：王辉[1] 岑威钧[1] 王栋良 唐杰 WANG Hui;CEN Weijun;WANG Dongliang;TANG Jie(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《水资源与水工程学报》2023年第5期165-171,共7页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51009055);水能资源利用关键技术湖南省重点实验室开放基金项目(PKLHD202004)。

摘　　要：采用三维非线性有限元法,对Ⅷ度强震区某拟建抽水蓄能电站坝高161 m的上库高沥青混凝土面板堆石坝开展静动力应力变形计算。结果表明:静力条件下大坝变形分布规律合理,蓄水期坝体水平位移和沉降量极值分别为62.64和151.85 cm,面板拉应变极值为0.56%;在Ⅷ度设防地震作用下,坝体顺沟谷向、坝轴向和竖向动位移极值分别为22.88、21.90和13.76 cm,加速度极值分别为12.31、12.26和12.14 m/s^(2),震后坝顶震陷极值为30.01 cm,震陷率为0.19%;在面板反弧段和挖填交界处为拉应变峰值区,极值为0.85%。综合评价大坝整体安全性能良好,地震时不会出现重大安全问题。Three-dimensional nonlinear finite element method is used to calculate the static and dynamic stress-deformation of the 161 m high asphalt concrete-faced rockfill dam in the upper reservoir of a pumped storage power station in the strong earthquake area with seismic intensity of Ⅷ.The results show that the deformation distribution of the dam is reasonable under static conditions.The maximum horizontal displacement and settlement of the dam body are 62.64 and 151.85 cm,respectively,and the maximum tensile strain of the dam face is 0.56% in storage period of the reservoir.Under the effect of the Ⅷ degree seismic action,the maximum dynamic displacement of the dam body in the valley direction,the axial direction and the vertical direction are 22.88,21.90 and 13.76 cm,the maximum dynamic acceleration rates are 12.31,12.26 and 12.14 m/s^(2),and the maximum vertical permanent deformation after the earthquake is 30.01 cm,with the earthquake subsidence rate of 0.19%.The arc section and the junction of excavation and filling are the peak areas of the tensile strain of the concrete face,and the extreme value is 0.85%.In summary,the overall safety performance of the dam is good and there will be no major safety problems during earthquakes.

关 键 词：沥青混凝土面板堆石坝 强震区 应力变形 动力反应 抽水蓄能电站 

分 类 号：TV641.1[水利工程—水利水电工程]