Mechanical anisotropy of columnar jointed basalts: An example from the Baihetan hydropower station, China
文献类型：期刊论文
| 作者 | Hatzor, Yossef H.2; Jiang, Quan1; Feng, Xia-ting1 ; Hao, Xian-jie1; Li, Shao-jun1
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| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 175页码:35-45 |
| 关键词 | Mechanical anisotropy Transverse isotropy Columnar basalts Rock joints Rock mass |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2014.03.019 |
| 英文摘要 | Columnar jointed basalts are characterized by a self-organized joint network of discontinuities and pose a difficult challenge for geotechnical engineering design due to their inherent anisotropic nature. We explore here the anisotropic characteristics of the columnar basalt formation in the Chinese Baihetan hydropower station, including aspects of the geometrical rock structure, deformation, and strength anisotropy. Site investigations reveal that a typical cross section of the columnar basalt blocks is mainly quadrangular and pentagonal with an average edge length of 0.152 m. Three types of joints with different macro- and micro-characteristics form the columnar jointed rock mass and are identified by scanning electron microscopy. In situ ultrasonic tests further confirm that the columnar basalt prisms exhibit transverse isotropy with the plane of isotropy perpendicular to the column axis, as can also be observed in the field. Strength anisotropy is confirmed by point load and uniaxial compression tests. The mechanical and anisotropic characteristics of Baihetan's jointed basalt mass can be explained by its multi-scale joints pattern by means of Goodman's stiffness equation. We find that the anisotropic coefficients obtained for its deformability and strength are similar for all testing methods employed, including in situ P wave velocity, point load tests, and uniaxial compression tests. This result confirms the strong anisotropic effect in these rock masses and facilitates, an issue that must be considered when assigning input parameters for various classification and numerical analyses schemes. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000336704400004 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3604]  |
| 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 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Ben Gurion Univ Negev, Dept Geol Environm Sci |
| 推荐引用方式 GB/T 7714 | Hatzor, Yossef H.,Jiang, Quan,Feng, Xia-ting,et al. Mechanical anisotropy of columnar jointed basalts: An example from the Baihetan hydropower station, China[J]. ENGINEERING GEOLOGY,2014,175:35-45. |
| APA | Hatzor, Yossef H.,Jiang, Quan,Feng, Xia-ting,Hao, Xian-jie,&Li, Shao-jun.(2014).Mechanical anisotropy of columnar jointed basalts: An example from the Baihetan hydropower station, China.ENGINEERING GEOLOGY,175,35-45. |
| MLA | Hatzor, Yossef H.,et al."Mechanical anisotropy of columnar jointed basalts: An example from the Baihetan hydropower station, China".ENGINEERING GEOLOGY 175(2014):35-45. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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