特高拱坝长期运行时变效应的状态空间诊断方法  

State space diagnosis method for time-varying effect of extra-high arch dam in long-term operation

作　　者：陈波[1,2] 吴诚姝 刘庭赫 顾冲时 CHEN Bo;WU Chengshu;LIU Tinghe;GU Chongshi(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing,Jiangsu 210098,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing,Jiangsu 210098,China;Northeast Zhongshui Survey Design Research Corporation Limited,Changchun,Jilin 130021,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]中水东北勘测设计研究有限责任公司,吉林长春130021

出　　处：《岩石力学与工程学报》2023年第4期868-878,共11页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金面上项目(52079049);国家自然科学基金重点项目(51739003)。

摘　　要：特高拱坝具有“三高一强”特点,长期运行中呈现复杂、多样和时变的变形性态,其中,时变特点隐含了大坝系统安全性的演化过程,对工程健康服役意义重大。规范明确指出,特高拱坝的变形性态需开展专项研究。本文首先分析国内典型特高拱坝的变形时变特性,然后,基于时变效应呈现的差异性,深入剖析特高拱坝时效变形的影响因素和形成机制;接着,考虑时效变形由多种因素叠加产生且不可直接监测,将时效变形视为状态向量,以实测变形作为观测序列,小波分解的趋势项作为状态序列,提出基于状态空间模型的特高拱坝时效变形分离方法;最后,提出时变效应的敛散性判别指标,实现了从时变角度开展大坝安全判定。成果可揭示特高拱坝时效变形的整体演变规律和趋势,并诊断大坝健康服役性能。The extra-high arch dam has the characteristics of three high and one strong.It exhibits complex,diverse and time-varying deformation behavior in long-term operation.Among them,the time-varying characteristics imply the evolution of dam system safety.This is of great significance to the service of engineering health.The specification clearly states that the deformation behavior of extra-high arch dams needs to be specifically studied.In this paper,the deformation time-varying characteristics of typical extra-high arch dams in China are analyzed.Then,based on the differences presented by the time-varying effects,the influencing factors and formation mechanism of the aging deformation of the ultra-high arch dam are analyzed in depth.Next,consider that the aging deformation is generated by the superposition of multiple factors and cannot be directly monitored.The aging deformation is regarded as a state vector,the measured deformation is used as the observation sequence,and the trend term of wavelet decomposition is used as the state sequence.A time-sensitive deformation separation method for ultra-high arch dams based on state-space model is proposed.Finally,the discriminant index of time-varying effect is proposed.This enables dam safety judgments from a time-varying perspective.The overall evolution law and trend of the aging deformation of ultra-high arch dams can be revealed,and the healthy service performance of the dam can be diagnosed.

关 键 词：水利工程 特高拱坝 实测资料 时变效应 状态空间模型 敛散性分析 

分 类 号：TV64[水利工程—水利水电工程]