摘要
巴基斯坦卡洛特水电站沥青混凝土心墙堆石坝最大坝高95.5 m,工程场地地震基本烈度为Ⅷ度,为目前世界上高地震区在建的最高全断面软岩填筑堆石坝。采用三维有限元静动力法分析了卡洛特沥青混凝土心墙堆石坝坝体和心墙的应力分布、变形情况、位移分布,对大坝抗震设计进行了安全复核和评价,并提出了相应的抗震措施。计算结果表明:大坝坝体应力、变形和位移符合一般土石坝的规律;心墙应力水平低,顺河向位移小,整体受力状态良好,不会发生挠曲和剪切破坏。坝体分区填筑设计和抗震措施是合理的,大坝整体是安全的。抗震设计和安全评价可为类似高地震区沥青混凝土心墙堆石坝设计提供参考。
The asphalt concrete core rockfill dam of Karot Hydropower Station in Pakistan is 95.5m-high,which is the highest rock rockfill dam with whole section of soft rock built in high seismic area,and the basic seismic intensity of the project site is grade VIII.Three-dimensional finite element method was used to analyze the stress,deformation,displacement of dam body and asphalt core wall and the safety review and evaluation of the dam seismic design were carried out,and the corresponding seismic measures were put forward.The calculation results showed that the stress,deformation and displacement of the dam complies with the general laws of earth-rock dam;the stress level of the core wall is low,the displacement along the river of the core wall is small,and the overall stress state is good,the deflection and shear failure will not occur.The zoning filling design and seismic measures are reasonable,and the dam is safe.The seismic design and safety evaluation can provide reference for the design of asphalt concrete core rockfill dam in similar high seismic areas.
作者
孔凡辉
万云辉
张超
吴超
KONG Fanhui;WAN Yunhui;ZHANG Chao;WU Chao(Changjiang Survey,Planning,Design and Research,Co.Ltd.,Wuhan 430071,China)
出处
《水利水电快报》
2022年第4期79-83,89,共6页
Express Water Resources & Hydropower Information
基金
国家重点研发项目计划资助“300 m级特高土石坝建设与安全保障技术”(2017YFC0404805)。
关键词
堆石坝
高地震区
软岩
抗震设计
安全评价
卡洛特水电站
巴基斯坦
rockfill dam
high seismic intensity area
soft rock
seismic design
safety evaluation
Karot Hydropower Station
Pakistan
