Deformation behaviour of strain-softening rock mass in tunnels considering deterioration model of elastic modulus
文献类型：期刊论文
| 作者 | Cui, Lan1,4; Yang, Wenyu2; Sheng, Qian1,4; Zheng, Junjie3; Ali, Nafees1,4 |
| 刊名 | GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 10期号:1页码:23 |
| 关键词 | Elastic modulus Geological Strength Index (GSI) In-situ rock mass Deformation behaviour Tunnel |
| ISSN号 | 2363-8419 |
| DOI | 10.1007/s40948-024-00877-4 |
| 英文摘要 | By analyzing the composite effects of the plastic shear strain and confining stress according to the laboratory test results, a model adopting a deteriorating elastic modulus for the intact rock is proposed. Soft rock such as coal and the strong rock such as granite with different quality are investigated. Geological Strength Index (GSI) is adopted to represent the integrity of rock, to be specific, from intact rock to the rock mass. Specifically, for the strain-softening rock mass, the elastic modulus is gained by introducing GSI into the deterioration model. The strength parameters are obtained by fitting GSI into Hoek-Brown failure criterion. Then, the elastic modulus and strength parameters of the rock mass are employed in the numerical procedure for solving out the rock deformation, the radii of the plastic softening and residual zones of the tunnels. The rationality of the numerical procedure is verified with the existing semi-analytical and analytical procedures. In the discussion, the influences of the critical plastic parameters and GSI, on the elastic modulus, rock deformation, radii of the plastic softening and residual zones are investigated. Five models for the variation of the modulus including the proposed deterioration model are defined. The rock mass deformation behaviours of the five models are compared. The results indicate that, in the plastic softening zone that is far away from the tunnel periphery, the elastic modulus is more sensitive to the plastic shear strain, whereas near the tunnel periphery, the elastic modulus is primarily affected by the confining stress. Regarding a linear decrease of the elastic modulus versus the plastic shear strain overestimates the elastic modulus to some extent, especially for the soft rock mass. Composite effects of plastic shear strain and confining stress based on the laboratory test results are studied.A deterioration model of elastic modulus is proposed by fitting GSI into Hoek-Brown failure criterion.Deterioration model of elastic modulus is adopted in the numerical procedure for estimating the tunnel stability.Parametric and comparative study is conducted based on the numerical procedure considering deterioratin modulus. |
| 资助项目 | National Natural Science Foundation of China[52279118] ; National Natural Science Foundation of China[U21A20159] ; National Key Research and Development[2023YFC3007403] ; Program Project of Youth Innovation Promotion Association of Chinese Academy of Sciences[2023344] ; Postdoctoral Fellowship Program of CPSF[GZC20242129] |
| WOS研究方向 | Energy & Fuels ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001339921900001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42949]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cui, Lan; Yang, Wenyu |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China 3.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China 4.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. Deformation behaviour of strain-softening rock mass in tunnels considering deterioration model of elastic modulus[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2024,10(1):23. |
| APA | Cui, Lan,Yang, Wenyu,Sheng, Qian,Zheng, Junjie,&Ali, Nafees.(2024).Deformation behaviour of strain-softening rock mass in tunnels considering deterioration model of elastic modulus.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,10(1),23. |
| MLA | Cui, Lan,et al."Deformation behaviour of strain-softening rock mass in tunnels considering deterioration model of elastic modulus".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 10.1(2024):23. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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