基于随机场理论的双线盾构隧道地层变形分析

doi:10.13722/j.cnki.jrme.2018.0077

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Abstract The safety of shield tunnel construction requires the proper estimation of surrounding soil deformation. The random field theory together with the finite difference analysis and Monte Carlo simulation are used to carry out the stochastic analysis on the surrounding soil deformation induced by twin tunneling in multi-layer soils considering the spatial variability of soils. The effects of scales of fluctuation(SOF) of Young?s modulus in both vertical and horizontal directions and coefficients of variation(COV) of Young?s modulus on the surrounding soil deformation are investigated and discussed in detail. Results show that the effects of COV of Young?s modulus on the deformation are more important than SOF. The effects of the anisotropy coefficient on the maximum deformation are limited when increases to 32. Additionally，the pattern of the surface subsidence curve depends highly on the distribution of the modulus above the tunnel. According to the results，the equivalent characteristic modulus is proposed for tunnel design in the typical weathered granite stratum in Xiamen.

Key words： tunnelling engineering twin shield tunneling random field surrounding soil deformation reliability theory equivalent characteristic modulus

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	Articles by authors
	LI Jianbin1
	2
	CHEN Jian1
	2
	LUO Hongxing3
	CHENG Hongzhan4
	HU Zhifeng1
	2
	HUANG Juehao1
	2
	ZHANG Shankai1
	2

Cite this article:

LI Jianbin1,2,CHEN Jian1, et al. Study on surrounding soil deformation induced by twin shield tunneling based on random field theory[J]. , 2018, 37(7): 1748-1765.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0077 OR http://www.rockmech.org/EN/Y2018/V37/I7/1748

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