双侧深基坑施工对紧邻地铁隧道变形影响的分析

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Abstract According to the practice of deep excavation adjacent to subway tunnel in Guangzhou，the finite element software Midas/GTS is employed to establish a 3D numerical model to simulate and analyze the interactive impact on the crossing tunnel caused by different construction sequences of the adjacent deep excavations on both sides of the tunnel. A comparative analysis is also made between the measured data and the results of finite element method. The calculated results are good agreement with the field measurements. The two results show that symmetric excavation method is better than asymmetric excavation method in controlling the horizontal displacement of the tunnel；however，symmetric excavation method is not suitable for controlling the vertical displacement of the tunnel. A conclusion is proposed and verified by numerical experiment that the effect on the curved tunnel in the horizontal plane caused by unload on the convex side of the curved tunnel is more serious than that by unload on the concave side of the curved tunnel under the same condition，because the longitudinal stiffness is different in two sides of the curved tunnel.

Key words： tunnelling engineering deep excavation subway tunnel protection excavation scheme 3D finite element method numerical experiment longitudinal stiffness

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	Articles by authors
	WU Shangyong1
	2
	YANG Xiaoping1
	2
	LIU Tingjin1
	2

Cite this article:

WU Shangyong1,2,YANG Xiaoping1, et al. ANALYSIS OF INFLUENCE ON DEFORMATION OF ADJACENT SUBWAY TUNNEL DUE TO BILATERAL DEEP EXCAVATIONS[J]. , 2012, 31(S1): 3452-3458.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3452

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