白莲崖水库大坝径向位移变形监测分析  

Monitoring and analysis of radial displacement deformation of Bailianya Reservoir Dam

作　　者：李君廷 LI Junting(Anhui Linhuaigang Flood Control Engineering Management Bureau,Hefei 230088,China)

机构地区：[1]安徽省临淮岗洪水控制工程管理局,安徽合肥230088

出　　处：《水利建设与管理》2023年第9期19-30,共12页Water Conservancy Construction and Management

摘　　要：白莲崖水库最大坝高104.6m,是安徽省唯一的百米高坝。本文采用逐步回归分析法原理对大坝的坝体及坝基径向位移进行监测和分析,综合评价大坝安全监测系统工作状态,并提出运行管理监测建议。分析得出,库水位变化对坝体径向位移具有一定的影响,温度分量对于坝体径向位移的影响程度与水压分量基本相当,时效分量年变幅占总位移年变幅的比重较小。年变幅呈现出同一高程由河床中部向两岸逐渐减小,同一断面由高高程向低高程逐渐减小的分布规律,大坝变形协调。通过各测点的年变幅和年际变化分析看出,大坝整体刚度未出现明显降低,结构整体性完好。Bailianya Reservoir has a maximum dam height of 104.6 meters,making it the only one-hundred-meter high dam in Anhui Province.In this paper,the principle of stepwise regression analysis is used to monitor and analyze the radial displacement of the dam body and foundation.The working status of the dam safety monitoring system is comprehensively evaluated,and suggestions for operational management and monitoring are proposed.The analysis reveals that the changes in water level in the reservoir have a certain influence on the radial displacement of the dam body.The temperature component has a similar impact on the radial displacement as the water pressure component,while the creep component has a relatively smaller proportion in the total displacement variation.The annual variation in displacement shows a distribution pattern where the variation gradually decreases from the middle of the riverbed to both sides at the same elevation and from higher elevations to lower elevations at the same cross-section,indicating a coordinated deformation of the dam.Through the analysis of annual variation and inter-annual changes at various monitoring points,it is observed that there is no significant decrease in the overall stiffness of the dam,and the structural integrity remains intact.

关 键 词：水库大坝 径向位移 变形 分析 

分 类 号：TV642.2[水利工程—水利水电工程]