高速铁路隧道围岩参数空间变异性的力学响应分析

doi:10.13722/j.cnki.jrme.2017.0002

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Abstract In the high speed railway tunnel，the mechanical behavior of surrounding rock is greatly affected by the spatial variation of rock parameters. A non-intrusive stochastic finite difference model was thus proposed to explore the influence of spatial variation of parameters of surrounding rock. The stratigraphic structure of the tunnel was simulated with Monte-Carlo methods. The proposed model was applied to analyze the mechanical behavior of the tunnel after excavation，with emphasis on the impact of parameter variation and spatial correlation. The mechanical behaviors influenced are the deformation characteristics of the surrounding rock，the mode of the plastic zone development，and the morphology of the ground surface settlement. The proposed model was compared with the deterministic model. The low-intensity structural load was found to dominate the mechanical behaviors. The anisotropic behavior is significant in the tunnel structure after excavation. The sensitivity and nonlinearity of the performance function were analyzed. The distributional and transitional effect of performance function was provided.

Key words： rock mechanics high speed railway tunnel surrounding rock behavior spatial variation non-intrusive stochastic analysis Karhunen-Loè ve series expansion

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	WEN Ming
	ZHANG Dingli
	FANG Qian

Cite this article:

WEN Ming,ZHANG Dingli,FANG Qian. Stochastic analysis of surrounding rock behavior of high speed railway tunnel considering spatial variation of rock parameters[J]. , 2017, 36(7): 1697-1709.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0002 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I7/1697

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