水平冻结施工浅埋隧道对邻近正交路基的作用分析

doi:10.13722/j.cnki.jrme.2020.0311

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Abstract In order to evaluate the influence of horizontal freezing tunnel construction on the adjacent orthogonal subgrade more reasonably，considering the non-uniform frost heave of soil and regarding the subgrade structure as an elastic Euler Bernoulli continuous beam， a coupling calculation equation for evaluating the effect of horizontal freezing tunnel construction on the adjacent orthogonal subgrade was deduced based on deformation coordination conditions，random medium theory and superposition principle. The reliability of the random medium prediction method was verified by an engineering example，and the accuracy of the coupling method was shown by comparing the measured values with the calculation results of the coupling method and the two-stage method. Finally，numerical simulation was carried out based on ABAQUS software，and the results show that the coupling method and ABAQUS simulation results are in good agreement with each other. It is also shown that the uplift displacement at the same location of the subgrade increases gradually as the frozen wall expands，and that the lower the temperature of the refrigerant medium or the shallower the tunnel depth，the larger the uplift deformation of the subgrade. The frozen pipes in silty clay layers have the greatest impact on the uplift deformation of the subgrade. The improved calculation method in this paper can provide some theoretical guidance for the protection measures to reduce the influence of horizontal freezing tunnel construction on subgrade.

Key words： soil mechanics horizontal freezing method frost heave deformation random medium theory non-uniform frost heaving coupled calculation method

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	Articles by authors
	DONG Jianhua1
	2
	WU Xiaolei1
	2
	SHI Lijun1
	2
	KOU Haijun3

Cite this article:

DONG Jianhua1,2,WU Xiaolei1, et al. Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades[J]. , 2020, 39(11): 2365-2376.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0311 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I11/2365

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