Evaluation of input geological parameters and tunnel strain for strain-softening rock mass based on GSI
文献类型：期刊论文
| 作者 | Cui, Lan2,3; Sheng, Qian2,3; Zhang, Jun4; Dong, You-kou1; Guo, Zhen-shan4 |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2022-11-29 |
| 卷号 | 12期号:1页码:- |
| ISSN号 | 2045-2322 |
| 英文摘要 | The regression analysis method is being widely adopted to analyse the tunnel strain, most of which ignore the strain-softening effect of the rock mass and fail to consider the influence of support pressure, initial stress state, and rock mass strength classification in one fitting equation. This study aims to overcome these deficiencies with a regression model used to estimate the tunnel strain. A group of geological strength indexes (GSI) are configured to quantify the input strength parameters and deformation moduli for the rock mass with a quality ranging from poor to excellent. A specific semi-analytical procedure is developed to calculate the tunnel strain around a circular opening, which is validated by comparison with those using existing methods. A nonlinear regression model is then established to analyse the obtained tunnel strain, combining twelve fitting equations to relate the tunnel strain and the factors including the support pressure, GSI, initial stress state, and critical softening parameter. Particularly, three equations are for the estimation of the critical tunnel strain, critical support pressure, and tunnel strain under elastic behaviour, respectively; and the other nine equations are for the tunnel strain with different strain-softening behaviours. The relative significance between the GSI, the initial stress and the support pressure on the tunnel strain is assessed. |
| 学科主题 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000955946400058 |
| 出版者 | NATURE PORTFOLIO |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35298]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Marine Science and Technology, China University of Geosciences, Wuhan 430074, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.Key Laboratory of Highway Construction and Maintenance Technology in Loess Region of Ministry of Transport, Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030032, China |
| 推荐引用方式 GB/T 7714 | Cui, Lan,Sheng, Qian,Zhang, Jun,et al. Evaluation of input geological parameters and tunnel strain for strain-softening rock mass based on GSI[J]. SCIENTIFIC REPORTS,2022,12(1):-. |
| APA | Cui, Lan,Sheng, Qian,Zhang, Jun,Dong, You-kou,&Guo, Zhen-shan.(2022).Evaluation of input geological parameters and tunnel strain for strain-softening rock mass based on GSI.SCIENTIFIC REPORTS,12(1),-. |
| MLA | Cui, Lan,et al."Evaluation of input geological parameters and tunnel strain for strain-softening rock mass based on GSI".SCIENTIFIC REPORTS 12.1(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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