列车振动荷载作用下公轨合建隧道及周围土体动力响应特性研究

doi:10.13722/j.cnki.jrme.2021.0904

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Abstract In order to study the dynamic response characteristics of road-metro tunnels and surrounding soil under train vibration loads，based on the time domain and frequency domain analysis，the dynamic response characteristics of tunnel segments and internal structures，as well as the attenuation characteristics of vibration wave in the stratum are studied by using the method of model test combined with numerical simulation. The results show that in the full frequency domain under train loads，the dynamic response of tunnel segments increases with the frequency，while the dynamic response of the upper lane of the internal structure first increases(0–140 Hz) and then decreases(140–200 Hz). As for the attenuation amplitude of dynamic response at different positions，the upper lane is the largest，its average attenuation amplitude of response is 20.05 dB，and the attenuation amplitude of the peak acceleration in the corresponding time domain is 72.6%. In addition，the dynamic response of the tunnel structure will increase because of the moving effect of the train vibration load. Specifically，the peak acceleration at the track bed increases by about 105%，the side wall of the internal structure increases by 41.9%，the connection between the side wall and the upper lane increases by 47.3%，and the center of the upper lane increases by 22.3%. In the process of single train vibration load，the displacement of the tunnel structure meets its maximum at the arch bottom，with a peak value of 3.85 mm.

Key words： tunnelling engineering shield tunnel road-metro tunnel train vibration load model test dynamic response

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	YANG Wenbo
	YANG Linlin
	LIANG Yang
	QIAN Zhihao
	GUO Wenqi
	HE Chuan
	ZHOU Yang

Cite this article:

YANG Wenbo,YANG Linlin,LIANG Yang, et al. Study on the dynamic response characteristics of road-metro tunnels and surrounding soil under train vibration loads[J]. , 2022, 41(8): 1659-1670.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0904 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I8/1659

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