An enhanced numerical model for considering coupled strain-softening and seepage effects on rock masses surrounding a submarine tunnel
文献类型：期刊论文
| 作者 | Cui, Lan7,8; Yang, Wenyu6; Sheng, Qian7,8; Zheng, Junjie1; Zhang, Wengang4,5,6; Guan, Kai3; Song, Fei2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 17期号:3页码:1445-1458 |
| 关键词 | China Seepage force Strain-softening Submarine tunnel Numerical procedure Coupling effect |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2024.05.060 |
| 英文摘要 | The seepage of groundwater and the strain-softening of rock mass in a submarine tunnel expand the plastic region of rock, thereby affecting its overall stability. It is therefore essential to study the stress and strain fields in the rocks surrounding the submarine tunnel by considering the coupled effect of strainsoftening and seepage. However, the evolution equation for the hydro-mechanical parameters in the existing fully coupled solution is a uniform equation that is unable to reproduce the characteristics of rock mass in practice. In this study, an updated numerical procedure for the submarine tunnel is derived by coupling strain-softening and seepage effect based on the experimental results. According to the hydro-mechanical coupling theory, the hydro-mechanical parameters such as elastic modulus, Poisson's ratio, Biot's coefficient and permeability coefficient of rocks are characterized by the fitting equations derived from the experimental data. Then, the updated numerical procedure is deduced with the governing equations, boundary conditions, seepage equations and fitting equations. The updated numerical procedure is verified accurately compared with the previous analytical solution. By utilizing the updated numerical procedure, the characteristics of stress field and the influences of initial pore water pressure, Biot's coefficient, and permeability coefficient on the stress, displacement and water-inflow of the surrounding rocks are discussed. Regardless of the variations in hydro-mechanical parameters, the stress distribution has a similar trend. The initial permeability coefficient exerts the most significant influence on the stress field. With the increases in initial pore water pressure and Biot's coefficient, the plastic region expands, and the water-inflow and displacement increase accordingly. Given the fact that the stability of the tunnel is more sensitive to the seepage force controlled by the hydraulic parameters, it is suggested to dewater the ground above the submarine tunnel to control the initial pore water pressure. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/). |
| 资助项目 | National Natural Science Foundation of China[52279118] ; National Natural Science Foundation of China[U21A20159] ; Sub-project of National Key Research and Development[2023YFC3007403] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001448178400001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36592]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yang, Wenyu; Sheng, Qian |
| 作者单位 | 1.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China 2.Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China 3.Northeastern Univ, Ctr Rock Instabil & Seism Res, Sch Resource & Civil Engn, Shenyang 110819, Peoples R China 4.Chongqing Univ, Natl Joint Engn Res Ctr, Geohazards Prevent Reservoir Areas, Chongqing 400045, Peoples R China 5.Chongqing Univ, Key Lab New Technol Construct Cities Mt Area, Minist Educ, Chongqing 400045, Peoples R China 6.Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Lan,Yang, Wenyu,Sheng, Qian,et al. An enhanced numerical model for considering coupled strain-softening and seepage effects on rock masses surrounding a submarine tunnel[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(3):1445-1458. |
| APA | Cui, Lan.,Yang, Wenyu.,Sheng, Qian.,Zheng, Junjie.,Zhang, Wengang.,...&Song, Fei.(2025).An enhanced numerical model for considering coupled strain-softening and seepage effects on rock masses surrounding a submarine tunnel.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(3),1445-1458. |
| MLA | Cui, Lan,et al."An enhanced numerical model for considering coupled strain-softening and seepage effects on rock masses surrounding a submarine tunnel".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.3(2025):1445-1458. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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