Tunnel reinforcement in columnar jointed basalts: The role of rock mass anisotropy
文献类型：期刊论文
| 作者 | Yagoda-Biran, Gony1; Hatzor, Yossef H.1; Feng, Xia-Ting3 ; Li, Shaojun3; Hu, Lianxing2; Jiang, Quan3
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| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
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| 出版日期 | 2015 |
| 卷号 | 46页码:1-11 |
| 关键词 | Tunneling Columnar basalt Rock bolts DDA Anisotropy |
| ISSN号 | 0886-7798 |
| DOI | 10.1016/j.tust.2014.10.008 |
| 英文摘要 | The extent of the loosening zone in tunnels excavated through columnar jointed basalts is studied with the numerical discontinuous deformation analysis (DDA) method. The structure of the rock mass and tunnel geometry are modeled on the basis of a real field case study of deep tunneling performed in such a rock mass in south west China. Slender prismatic keyblocks formed by the intersection of broadly-spaced, gently-dipping breccia layers and closely-spaced, orthogonally oriented, steeply dipping columnar joints result in a highly anisotropic rock mass structure and give rise to sliding and toppling failure modes in the sidewalls and to an excessive height of loosening zone in the roof, the geometry of which is shown to be controlled by the orientation of the steeply inclined columnar joints. Results of displacement monitoring performed during tunnel excavation in a similar rock mass with multiple point borehole extensometers confirm the numerically obtained depth of the loosening zone both in the sidewalls and the roof. We find that the height of the loosening zone in the roof as obtained with DDA is greater than would have been predicted by Terzaghi's empirical rock load classification for "blocky" rock masses, and show that its shape and orientation are controlled by the anisotropy of the rock mass structure. Moreover, we demonstrate that dimensioning rock bolt reinforcement using well-established empirical criteria without consideration of the anisotropic nature of the rock mass may lead to un-conservative design. (C) 2014 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000349503500001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3684]  |
| 专题 | 岩土力学所知识全产出_期刊论文 岩土力学所知识全产出 |
| 作者单位 | 1.Ben Gurion Univ Negev, Dept Geol & Environm Sci, IL-84105 Beer Sheva, Israel; 2.China Three Gorges Corp, 3.Chinese Acad Sci, Inst Rock & Soil Mech, Natl Key Lab Geomech & Geotech Engn ; |
| 推荐引用方式 GB/T 7714 | Yagoda-Biran, Gony,Hatzor, Yossef H.,Feng, Xia-Ting,et al. Tunnel reinforcement in columnar jointed basalts: The role of rock mass anisotropy[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2015,46:1-11. |
| APA | Yagoda-Biran, Gony,Hatzor, Yossef H.,Feng, Xia-Ting,Li, Shaojun,Hu, Lianxing,&Jiang, Quan.(2015).Tunnel reinforcement in columnar jointed basalts: The role of rock mass anisotropy.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,46,1-11. |
| MLA | Yagoda-Biran, Gony,et al."Tunnel reinforcement in columnar jointed basalts: The role of rock mass anisotropy".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 46(2015):1-11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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