Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades

doi:10.13722/j.cnki.jrme.2020.0311

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	Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades
	Dong, Jianhua 1,2; Wu, Xiaolei 1,2; Shi, Lijun 1,2; Kou, Haijun 3
刊名	Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
	2020-11-01
卷号	39 期号:11 页码:2365-2376
关键词	ABAQUS Deformation Freezing Numerical methods Tunneling (excavation) Calculation results Coupling calculations Deformation coordination Protection measures Random medium theories Shallow tunnel construction Superposition principle Uplift displacement
ISSN号	10006915
DOI	10.13722/j.cnki.jrme.2020.0311
英文摘要	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. © 2020, Science Press. All right reserved.
语种	中文
出版者	Academia Sinica
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151000]
专题	土木工程学院
作者单位	1.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China; 3.China Railway 19 Bureau Group Co., Ltd., Beijing; 100176, China
推荐引用方式 GB/T 7714	Dong, Jianhua,Wu, Xiaolei,Shi, Lijun,et al. Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades[J]. Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering,2020,39(11):2365-2376.
APA	Dong, Jianhua,Wu, Xiaolei,Shi, Lijun,&Kou, Haijun.(2020).Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades.Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering,39(11),2365-2376.
MLA	Dong, Jianhua,et al."Effect of shallow tunnel construction by horizontal freezing on adjacent orthogonal subgrades".Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering 39.11(2020):2365-2376.