龙滩水电站坝顶变形过小原因分析  

Analysis on the Reason of Small Crest Deformation of Longtan Dam

作　　者：赵程 刘贝贝 农普裕 ZHAO Cheng;LIU Beibei;NONG Puyu(Large Dam Safety Supervision Center, National Energy Administration, Hangzhou 311122, Zhejiang, China; Longtan Hydropower Plant, Nanning 530029, Guangxi, China)

机构地区：[1]国家能源局大坝安全监察中心,浙江杭州311122 [2]龙滩水电开发有限公司龙滩水力发电厂,广西南宁530029

出　　处：《水力发电》2018年第11期39-43,共5页Water Power

摘　　要：监测资料显示,龙滩水电站坝顶变形明显小于其他同类型碾压混凝土坝。为探究其原因,采用有限元进行了坝体弹性模量反演以及温度和体形(刚度)敏感性分析。结果表明,坝体和坝基弹性模量均在正常范围内,温度对坝顶变形有一定影响,坝体体形(刚度)对坝顶变形影响较大,坝体体形较厚是龙滩水电站坝顶位移变幅较小的主要原因。The observation data show that the crest deformation of Longtan Dam is obviously smaller than other RCC dams. In order to explore the reason, the elastic modulus inversion and the sensitivity of temperature and stiffness of dam body are analyzed by finite element method. The results show that the elastic modulus of dam body and dam foundation are within the normal range, the temperature has some influence on crest deformation, and the dam body type （stiffness） has great influence on crest deformation. The thicker shape of dam body is the main reason for the smaller displacement of dam crest of Longtan Hydropower Station.

关 键 词：碾压混凝土坝 变幅 温度变形 坝体体形 反演 龙滩水电站 

分 类 号：TV698.11[水利工程—水利水电工程]