基于隧道不均匀变形的地表沉降随机介质理论预测模型

doi:10.13722/j.cnki.jrme.2017.1531

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Abstract Stochastic medium theory is a practical method in ground settlement prediction. It is generally assumed that the cross section of tunnel is uniformly converged. A parameterized non-uniform tunnel deformation mode containing three different modes is proposed in this paper. A model for predicting ground surface settlement is established by combining the stochastic medium theory. The formulae of settlement，slope and curvature are deduced in terms of relative tunnel deformation parameters. The influence of the tunnel deformation parameters on settlement trough is considered. Back analysis on the tunnel section from Dahongmen Bridge Station to Heyi Station in Beijing is presented. The results show that the settlement trough of non-uniform tunnel deformation is narrower and deeper. The predicted settlement trough calculated with the deformation mode in this paper is better than the other two. The empirical values of the parameters，the angle of influence zone of ground surface settlement β，the relative convergence ε，the relative ovalization δ，the relative vertical movement λ，are 34.65°–37.61°，0.81%–0.97%，0.41%–0.53%，0.26%–0.38%，respectively. The case study confirmed the soundness of the prediction model.

Key words： tunnelling engineering tunnel deformation ground surface settlement non-uniform convergence stochastic medium theory

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	Articles by authors
	LIU Bo1
	2
	YANG Weihong1
	ZHANG Gong3
	GAO Lei1

Cite this article:

LIU Bo1,2,YANG Weihong1, et al. A prediction model based on stochastic medium theory for ground surface settlement induced by non-uniform tunnel deformation[J]. , 2018, 37(8): 1943-1952.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1531 OR http://www.rockmech.org/EN/Y2018/V37/I8/1943

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