多锚点桩加固滑坡地段隧道衬砌地震响应特性研究

doi:10.13722/j.cnki.jrme.2022.0502

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Abstract To study the dynamic response characteristics of the tunnel lining reinforced by multi-anchor piles in landslide area，the optimal seismic performance of multi-anchor piles and the dynamic damage evolution mechanism of tunnel lining are discussed. In this study，a series of shaking table tests were carried out by using energy-dissipation springs as the damping optimization device of anchor head. The acceleration and dynamic strain data of the multi-anchor piles and tunnel lining under different probability levels of earthquake were obtained. By analyzing the time domain characteristics of tunnel lining acceleration and dynamic strain，the dynamic response characteristics and damage evolution law of the tunnel lining are elucidated. Based on the response data of multi-anchor piles peak acceleration(PPA)，peak dynamic strain(PTS) and plastic effect coefficient(PEC) at typical measuring points of the tunnel lining，the dynamic damage evolution mechanism of the tunnel lining is revealed. The results show that：(1) Under the loading of seismic waves with different amplitudes，the tunnel lining exhibits a spatial continuous effect of damage evolution from local to global，and the tunnel lining acceleration amplification factor( ) exhibits the distribution characteristics of prominent reactions on the unoptimized side；(2) limited to whether the optimization of multi-anchor piles and seismic wave loading effect，there are regional differences in the damage site and damage pattern of the tunnel lining，and the invert and vault are prone to become the weak areas in the seismic design of the tunnel；(3) The evolution of earthquake cumulative damage catastrophe of tunnel lining is elucidated from the perspective of plastic deformation characteristics based on the PEC variation potential；(4) The multi-anchor piles with energy dissipating springs as damping devices weaken the seismic wave energy of the pile to a certain extent，but are prone to produce a greater dynamic response during the reciprocal action of the seismic inertia force compared to ordinary multi-anchor piles.

Key words： tunnel engineering multi-anchor piles tunnel lining mechanism of damage shaking table test

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	Articles by authors
	WEI Hong1
	2
	WU Honggang2
	REN Guojun1
	TANG Lin1
	FENG Kang3
	WANG Shuang4

Cite this article:

WEI Hong1,2,WU Honggang2, et al. Study on seismic response characteristics of tunnel lining in landslide area reinforced by multi-anchor piles[J]. , 2023, 42(S1): 3481-3495.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0502 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS1/3481

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