Displacement response characteristics of different sand tunnel excavation faces under true triaxial loading
文献类型：期刊论文
| 作者 | Li, Erchao1; Gao, Quanchen1; Li, Xiao2,3; Mao, Tianqiao2,3; Zheng, Bo2,3 |
| 刊名 | FRONTIERS IN EARTH SCIENCE
 |
| 出版日期 | 2023-01-06 |
| 卷号 | 10页码:16 |
| 关键词 | full-section tunnel true triaxial loading model test stratum deformation displacement vector excavation face displacement model |
| DOI | 10.3389/feart.2022.1022719 |
| 英文摘要 | During the construction of subway tunnels, the geotechnical body is affected by excavation to produce three-dimensional spatial deformation. The deformation of geotechnical bodies is an important safety hazard for project advancement, so it is important to understand the excavation disturbance range and deformation mechanism. The current related research is mainly about the theory of land subsidence and the two-dimensional plane displacement of the stratum, and there are few studies on the specific three-dimensional disturbance mode and its mechanism. In order to better understand the three-dimensional displacement characteristics of the tunnel excavation soil, a tunnel excavation model test was established based on a true triaxial stress loading system combined with three-dimensional scanning technology for a superimposed sandy soil. Based on the established model, the vector displacement response range and three-dimensional deformation characteristics of the excavation face were studied in the main displacement affected area around the excavation face. Meanwhile, the deformation characteristics, such as vertical settlement and horizontal displacement of the stratum in the main influence area were analyzed. The results show that the main influence area of tunnel excavation is elliptical and distributed within a range of twice the diameter of the tunnel axis. The main influence range is bell-shaped in the vertical direction and inverted wedge-shaped in the horizontal direction. The three-dimensional space presents a "W " deformation distribution. The three-dimensional deformation theoretical model of the excavation face established in this paper can provide some references for the excavation engineering of superimposed sand-soil tunnels. |
| WOS关键词 | INDUCED GROUND MOVEMENTS ; DEFORMATION ; CONSTRUCTION ; FAILURE |
| 资助项目 | National Natural Science Foundation of China[51734009] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000916032900001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/106847]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Li, Erchao |
| 作者单位 | 1.China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Erchao,Gao, Quanchen,Li, Xiao,et al. Displacement response characteristics of different sand tunnel excavation faces under true triaxial loading[J]. FRONTIERS IN EARTH SCIENCE,2023,10:16. |
| APA | Li, Erchao,Gao, Quanchen,Li, Xiao,Mao, Tianqiao,&Zheng, Bo.(2023).Displacement response characteristics of different sand tunnel excavation faces under true triaxial loading.FRONTIERS IN EARTH SCIENCE,10,16. |
| MLA | Li, Erchao,et al."Displacement response characteristics of different sand tunnel excavation faces under true triaxial loading".FRONTIERS IN EARTH SCIENCE 10(2023):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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