Laboratory experimental study of the forming and failure mechanisms of soil arching during EPBS tunnelling in sand
文献类型：期刊论文
| 作者 | Li, Yunfa1,2; Wu, Guojun2; Chen, Weizhong2; Yuan, Jingqiang2; Huo, Mengzhe1,2; Liu, Yubiao2 |
| 刊名 | ENGINEERING FAILURE ANALYSIS
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 163页码:14 |
| 关键词 | Shield tunnel model tests EPBS tunnelling Face stability Arching effect Ground collapse |
| ISSN号 | 1350-6307 |
| DOI | 10.1016/j.engfailanal.2024.108518 |
| 英文摘要 | The effect of soil arching often leads to delayed ground collapse disasters when the tunnelling instability of earth pressure balance shields (EPBS) in sand. To reveal the formation and evolution of soil arching in sand, a laboratory-scale EPBS tunnelling model test was conducted. This EPBS tunnelling system simulated the entire process of shield tunnelling, which includes stable tunnelling, tunnel face instability, and ground collapse. The application of multi-field monitoring and three-dimensional scanning has revealed the influence of soil arching on sand layer collapse. The results indicate that: (1) Controlling the actual sand discharge rate to approach the theoretical rate can achieve stability of the tunnel face during the excavation process; (2) Maintaining higher soil pressure on the cutterhead can alleviate the loosening of the sand layer ahead; (3) The loosening zone in the vertical direction of the excavation section is significantly larger than that in the horizontal direction; (4) After the loose zone develops to the surface, each failure of the soil arching will cause significant surface subsidence, which can serve as a precursor to sudden ground collapse. The study provides a reference for the safe construction of tunnel engineering in sand. |
| 资助项目 | National Natural Science Foundation of China[52179116] ; National Natural Science Foundation of China[51991392] ; National Key R & D Program of China[2021YFC3100802] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001253640200001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41792]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wu, Guojun; Yuan, Jingqiang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yunfa,Wu, Guojun,Chen, Weizhong,et al. Laboratory experimental study of the forming and failure mechanisms of soil arching during EPBS tunnelling in sand[J]. ENGINEERING FAILURE ANALYSIS,2024,163:14. |
| APA | Li, Yunfa,Wu, Guojun,Chen, Weizhong,Yuan, Jingqiang,Huo, Mengzhe,&Liu, Yubiao.(2024).Laboratory experimental study of the forming and failure mechanisms of soil arching during EPBS tunnelling in sand.ENGINEERING FAILURE ANALYSIS,163,14. |
| MLA | Li, Yunfa,et al."Laboratory experimental study of the forming and failure mechanisms of soil arching during EPBS tunnelling in sand".ENGINEERING FAILURE ANALYSIS 163(2024):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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