特高拱坝长期运行时变效应的状态空间诊断方法

doi:10.13722/j.cnki.jrme.2022.0744

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Abstract 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.

Key words： hydraulic engineering extra-high arch dam measured data time-varying effect state space model convergence and divergence analysis

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	Articles by authors
	CHEN Bo1
	2
	WU Chengshu1
	2
	LIU Tinghe1
	2
	3
	GU Chongshi1
	2

Cite this article:

CHEN Bo1,2,WU Chengshu1, et al. State space diagnosis method for time-varying effect of extra-high arch dam in long-term operation[J]. , 2023, 42(4): 868-878.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0744 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I4/868

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