Geohazards of tunnel excavation in interbedded layers under high in situ stress
文献类型：期刊论文
| 作者 | Yang, Jianping1; Chen, Weizhong1,2; Zhao, Wusheng1; Tan, Xianjun1; Tian, Hongming1; Yang, Diansen1; Ma, Chishuai1 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2017 |
| 卷号 | 230页码:11-22 |
| 关键词 | Tunnel excavation Geohazard In situ stress Interbedded layers Rockburst Squeezing |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2017.09.007 |
| 英文摘要 | In situ stress is one of the most important parameters that affect rock mass stability during tunnel excavation. High in situ stress may induce a series of geohazards, such as rockburst in strong rock and squeezing in weak rock. This paper presents a case study of a tunnel excavated using a tunnel-boring machine across interbedded strong and weak rock layers under high in situ stress in Pakistan. To estimate the induced geohazards during tunnel excavation, in situ stress was measured and the stability of the tunnel was analyzed using the finite element method. In situ stress measured in the strong rock layers shows that the maximum compressive stress is very high, and its direction is almost perpendicular to the tunnel axis. Using a simple analytical method, stress distribution in weak layers was determined and the results show that the magnitude of the maximum compressive stress in the weak layers is much less than that in strong layers, and the direction is almost parallel with the tunnel axis. The FEM simulation reveals that the redistributed stress due to the tunnel excavation is more concentrated in strong layers and less concentrated in weak layers. Both the initial in situ stress distribution and the stress redistribution after tunnel excavation predict geohazard in strong layers rather than in weak layers. This point is consistent with the field records, which indicated that rockbursts were frequent in the strong rock layers and no squeezing occurred in the weak rock layers. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000417660000002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4169]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech ; 2.Shandong Univ, Res Ctr Geotech & Struct Engn |
| 推荐引用方式 GB/T 7714 | Yang, Jianping,Chen, Weizhong,Zhao, Wusheng,et al. Geohazards of tunnel excavation in interbedded layers under high in situ stress[J]. ENGINEERING GEOLOGY,2017,230:11-22. |
| APA | Yang, Jianping.,Chen, Weizhong.,Zhao, Wusheng.,Tan, Xianjun.,Tian, Hongming.,...&Ma, Chishuai.(2017).Geohazards of tunnel excavation in interbedded layers under high in situ stress.ENGINEERING GEOLOGY,230,11-22. |
| MLA | Yang, Jianping,et al."Geohazards of tunnel excavation in interbedded layers under high in situ stress".ENGINEERING GEOLOGY 230(2017):11-22. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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