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Time-Dependent Deformation Mechanism for Swelling Soft-Rock Tunnels in Coal Mines and Its Mathematical Deduction

文献类型：期刊论文

作者Yu, Jin3,4; Liu, Gengyun1,2; Cai, Yanyan4; Zhou, Jianfeng4; Liu, Shiyu4; Tu, Bingxiong4
刊名INTERNATIONAL JOURNAL OF GEOMECHANICS
出版日期2020-03-01
卷号20期号:3页码:10
ISSN号1532-3641
关键词Swelling soft-rock tunnels Time-dependent deformation Modified Nishihara model Humidity field theory Rock dilation model
DOI10.1061/(ASCE)GM.1943-5622.0001594
英文摘要The floor heave and the inward movement of sidewalls are often encountered in the excavation of tunnels with swelling rock properties. However, the deformation mechanism for swelling soft-rock tunnels cannot be reasonably revealed even now. In this paper, a time-dependent deformation mechanism is investigated in depth and the viscoelastoplastic deformation is obtained using a nonassociated flow rule and the modified Nishihara model. The continuous degradation behaviors of soft rock induced by the intercoupling between the stressed-dilation and the physicochemical swelling is considered based on the humidity field theory and the Zhang three-dimensional (3D) Hoek-Brown yield criterion. The results show that the time-dependent deformation exhibited is unstable in the secondary creep stage and tends to increase inversely with the values of the Zhang 3D Hoek-Brown criterion parameters and the elastic modulus, while it increases directly with the values of the humidity swelling coefficients and the Poisson's ratio. The substability creep behavior occurs earlier with decreasing the relaxation time. Furthermore, the sensitivity law of incorporated parameters corresponds well with their corresponding physical meaning and practical significance in this study.
资助项目National Natural Science Foundation of China[51774147] ; National Natural Science Foundation of China[51679093] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences ; Natural Science Foundation of Fujian Province, China[2017J01094]
WOS研究方向Engineering
语种英语
出版者ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号WOS:000507919900028
源URL[http://119.78.100.198/handle/2S6PX9GI/23308]  
专题中科院武汉岩土力学所
通讯作者Yu, Jin
作者单位1.Huaqiao Univ, Fujian Res Ctr Tunnelling & Urban Underground Spa, Sci Engn, Xiamen 361021, Peoples R China
2.Univ Shanghai Sci & Technol, Dept Civil Engn, Shanghai 200093, Peoples R China
3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
4.Huaqiao Univ, Fujian Res Ctr Tunnelling & Urban Underground Spa, Xiamen 361021, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Jin,Liu, Gengyun,Cai, Yanyan,et al. Time-Dependent Deformation Mechanism for Swelling Soft-Rock Tunnels in Coal Mines and Its Mathematical Deduction[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2020,20(3):10.
APA Yu, Jin,Liu, Gengyun,Cai, Yanyan,Zhou, Jianfeng,Liu, Shiyu,&Tu, Bingxiong.(2020).Time-Dependent Deformation Mechanism for Swelling Soft-Rock Tunnels in Coal Mines and Its Mathematical Deduction.INTERNATIONAL JOURNAL OF GEOMECHANICS,20(3),10.
MLA Yu, Jin,et al."Time-Dependent Deformation Mechanism for Swelling Soft-Rock Tunnels in Coal Mines and Its Mathematical Deduction".INTERNATIONAL JOURNAL OF GEOMECHANICS 20.3(2020):10.

入库方式： OAI收割

来源：武汉岩土力学研究所

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