Geomechanical model test for analysis of surrounding rock behaviours in composite strata
文献类型：期刊论文
| 作者 | Shi, Linken1,2; Zhou, Hui1,2; Song, Ming3; Lu, Jingjing1,2; Liu, Zhenjiang1,2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 13期号:4页码:774-786 |
| ISSN号 | 1674-7755 |
| 关键词 | Model test Tunnel excavation Composite strata Deformation and failure mechanism Stability analysis |
| DOI | 10.1016/j.jrmge.2020.12.002 |
| 英文摘要 | Due to the large differences in physico-mechanical properties of composite strata, jamming, head sinking and other serious consequences occur frequently during tunnel boring machine (TBM) excavation. To analyse the stability of surrounding rocks in composite strata under the disturbance of TBM excavation, a geomechanical model test was carried out based on the Lanzhou water supply project. The evolution patterns and distribution characteristics of the strain, stress, and tunnel deformation and fracturing were analysed. The results showed that during TBM excavation in the horizontal composite formations (with upper soft and lower hard layers and with upper hard and lower soft layers), a significant difference in response to the surrounding rocks can be observed. As the strength ratio of the surrounding rocks decreases, the ratio of the maximum strain of the hard rock mass to that of the relatively soft rock mass gradually decreases. The radial stress of the relatively soft rock mass is smaller than that of the hard rock mass in both types of composite strata, indicating that the weak rock mass in the composite formation results in the difference in the mechanical behaviours of the surrounding rocks. The displacement field of the surrounding rocks obtained by the digital speckle correlation method (DSCM) and the macro-fracture morphology after tunnel excavation visually reflected the deformation difference of the composite rock mass. Finally, some suggestions and measures were provided for TBM excavation in composite strata, such as advance geological forecasting and effective monitoring of weak rock masses. (C) 2021 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. |
| 资助项目 | National Natural Science Foundation of China[41941018] ; National Program on Key Basic Research of China (973 Program)[2014CB046902] ; Hubei Province Natural Science Foundation Innovation Group[2018CFA013] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000672711100006 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/27385]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CCCC Second Highway Consultants Co Ltd, Wuhan 430056, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Linken,Zhou, Hui,Song, Ming,et al. Geomechanical model test for analysis of surrounding rock behaviours in composite strata[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2021,13(4):774-786. |
| APA | Shi, Linken,Zhou, Hui,Song, Ming,Lu, Jingjing,&Liu, Zhenjiang.(2021).Geomechanical model test for analysis of surrounding rock behaviours in composite strata.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,13(4),774-786. |
| MLA | Shi, Linken,et al."Geomechanical model test for analysis of surrounding rock behaviours in composite strata".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 13.4(2021):774-786. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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