FDEM numerical study of the influence law of geostress on state and pressure of tunnel surrounding rock
文献类型：期刊论文
| 作者 | Hu, Bo1,2; Xiao, Mingqing3,4; Fu, Xiaodong2,5; Yang, Jian3,4; Xu, Chen3,4; Wu, Jiaming3,4; Zhou, Yongqiang2,5 |
| 刊名 | FRONTIERS IN ECOLOGY AND EVOLUTION
 |
| 出版日期 | 2023-07-28 |
| 卷号 | 11页码:19 |
| 关键词 | FDEM surrounding rock pressure design value state of surrounding rock geostress |
| ISSN号 | 2296-701X |
| DOI | 10.3389/fevo.2023.1237250 |
| 英文摘要 | Surrounding rock pressure is a crucial parameter in tunnel engineering design, and its calculation is a classic challenge. The surrounding rock pressure is influenced by geostress, but existing calculation methods often do not take into account the effect of geostress. In this paper, finite discrete element method (FDEM) is used to study the design values of tunnel surrounding rock pressure under different geostress fields. Firstly, a set of calibration methods for input parameters of FDEM is summarized based on previous studies. Then, taking a high-speed railway tunnel in IV-level surrounding rock as an example, the excavation-induced failure process of the tunnel under the influence of gravity stress field and geostress field is simulated using the FDEM. By comparing the results with those of the finite element method simulation, the rationality of applying FDEM to the simulation of tunnel excavation is demonstrated. Next, a calculation method of surrounding rock pressure design value based on FDEM is proposed by introducing tunnel displacement criterion, and its validity is verified by comparing with the results of the theoretical formula. Finally, the surrounding rock pressure design values under different geostress are analyzed by using this calculation method. The results show that there are significant differences between the gravity stress field and the geostress field in the maximum principal stress distribution, failure zone form and crack distribution. The geostress directly influences the design value of surrounding rock pressure. As the geostress varies from 4MPa to 12MPa, the corresponding design value increases from 49KPa to 1,288KPa, illustrating a quadratic relationship between them. With the corresponding design support force, the displacement of the surrounding rock is controlled within a reasonable range, ensuring the stability of the tunnel is maintained. |
| 资助项目 | National Key Research and Development Program[2021YFB2600404] ; Knowledge Innovation Program of Wuhan[2022010801020164] ; Youth Innovation Promotion Association, CAS[2021325] ; Regional Innovation and Development Joint Fund of the National Natural Science Foundation of China[U21A20159] ; National Natural Science Foundation of China[52179117] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001046541700001 |
| 出版者 | FRONTIERS MEDIA SA |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39139]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Yongqiang |
| 作者单位 | 1.Changan Univ, Sch Civil Engn, Xian, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 3.China Railway Siyuan Survey & Design Grp Co Ltd, Wuhan, Peoples R China 4.Natl & Local Joint Engn Res Ctr Underwater Tunneli, Wuhan, Peoples R China 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Bo,Xiao, Mingqing,Fu, Xiaodong,et al. FDEM numerical study of the influence law of geostress on state and pressure of tunnel surrounding rock[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2023,11:19. |
| APA | Hu, Bo.,Xiao, Mingqing.,Fu, Xiaodong.,Yang, Jian.,Xu, Chen.,...&Zhou, Yongqiang.(2023).FDEM numerical study of the influence law of geostress on state and pressure of tunnel surrounding rock.FRONTIERS IN ECOLOGY AND EVOLUTION,11,19. |
| MLA | Hu, Bo,et al."FDEM numerical study of the influence law of geostress on state and pressure of tunnel surrounding rock".FRONTIERS IN ECOLOGY AND EVOLUTION 11(2023):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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