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doi:10.13722/j.cnki.jrme.2022.0866

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Abstract In order to study the seismic cumulative deformation effect(SCDE) of tunnel lining in landslide area reinforced by double-row piles，the shaking table test is conducted for the first time based on an actual engineering case to test the acceleration and dynamic displacement response data of double-row piles and tunnel lining under different probability levels of seismic action. The internal correlation mechanism of the deformation- frequency-energy evolution characteristics of the tunnel lining during the whole process of slope disaster is established. An analysis index of plastic deformation degree of tunnel lining under seismic wave excitation-plastic effect coefficient(PEC) is proposed，and the applicability of PEC to analyze plastic deformation of tunnel lining is verified by Arias strength( ) from the perspective of the energy transfer characteristics. Based on the fast Fourier transform(FFT) method，the influence mechanism of the seismic wave frequency components on SCDE and local deformation of the tunnel lining is discussed. The results show that PEC fully takes into account the plastic deformation characteristics of the tunnel lining and has a clear physical meaning，which can more clearly reflect the degree of plastic deformation and SCDE of the tunnel lining than the peak tunnel displacement(PTD). The seismic cumulative deformation evolution process of tunnel lining and the regional response characteristics of the particle spatial position are systematically revealed by the comparative verification analysis of peak strength ratio( ). The results of the frequency domain analysis show that the low-frequency and high-frequency components of the seismic waves play a controlling role in the overall and local deformation of the tunnel lining，respectively. The dynamic deformation response of tunnel lining in the landslide area reinforced by double-row piles is a progressive cumulative evolution process. Obtaining a better understanding of the SCDE of the tunnel lining can provide a scientific basis for the identification of the seismic damage status and appropriate seismic reinforcement.

Key words： tunnelling engineering seismic cumulative deformation effect plastic effect coefficient dynamic displacement response double row of piles

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	Articles by authors
	WEI Hong1
	2
	WU Honggang2
	WU Daoyong1
	3
	SHI Ying4
	TANG Lin1
	LV Xiaoqiang1
	CHEN Qing5

Cite this article:

WEI Hong1,2,WU Honggang2, et al. Experimental study on the seismic cumulative deformation effect of tunnel lining in landslide area reinforced by double-row piles[J]. , 2023, 42(S2): 3966-3979.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0866 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/3966

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