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| 铜街子水电站坝基岩石单轴压缩与侧限膨胀的试验研究 | |
| 引用本文： | 刘晓丽,王思敬,王恩志,薛强.铜街子水电站坝基岩石单轴压缩与侧限膨胀的试验研究[J].水文地质工程地质,2006,33(2):45-49. |
| 作者姓名： | 刘晓丽 王思敬 王恩志 薛强 |
| 作者单位： | 1. 清华大学水利水电工程系,北京,100084 2. 清华大学水利水电工程系,北京,100084;中国科学院地质与地球物理研究所,北京,100029 3. 中国科学院武汉岩土力学研究所,武汉,430071 |
| 基金项目： | 致谢：感谢北京科技大学土木与环境工程学院杨同、张磊老师在试验过程中的帮助. |
| 摘 要： | 通过对铜街子水电站坝基岩石进行单轴压缩与侧限膨胀试验，得出了单轴压缩条件下该区膨胀岩发生体胀、非膨胀岩发生体缩的结论。反映在试验现象上，表现为单轴压缩载荷下非膨胀岩受拉破坏和膨胀岩受剪破坏模式。基于细观力学理论对这一现象进行了探讨。铜街子水电站基础岩石的膨胀性质具有重要的工程意义，膨胀性增加了岩石内部的压应力，提高了岩石的抗剪性能，同时膨胀过程中岩石细观结构变化引起其孔隙减小，从而降低了水的渗透能力，有利于基础的稳定。 |
| 关 键 词： | 单轴压缩 膨胀岩 细观力学 |
| 文章编号： | 1000-3665（2006）02-0045-05 |
| 收稿时间： | 2005-05-11 |
| 修稿时间： | 2005-12-05 |
Experimental study on the uniaxial compression and confined expansion of rocks from Tongjiezi hydropower station zone |
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| LIU Xiao-li,WANG Si-jing,WANG En-zhi,XUE Qiang.Experimental study on the uniaxial compression and confined expansion of rocks from Tongjiezi hydropower station zone[J].Hydrogeology and Engineering Geology,2006,33(2):45-49. | |
| Authors: | LIU Xiao-li WANG Si-jing WANG En-zhi XUE Qiang |
| Institution: | 1. Hydraulics and Engineering Department, Tsinghua University, Beijing 100084, China ; 2. Institute of Geology and Geophysics of the Chinese Academy of Sciences, Beijing 100029, China ; 3. Institute of Rock and Soil Mechanics of the Chinese Academy of Sciences, Wuhan 430071, China |
| Abstract: | By experimental study on the uniaxial compression and confined expansion of rocks from Tongjiezi hydropower station zone,Sichuan Province,it concludes that volumes of expansive rocks expand under uniaxial compression,while volumes of non-expansive rocks contract.The experiments show that the failure modes are different for the expansive rocks and non-expansive rocks: tension leads to the failure of non-expansive rocks,while shear leads to the failure of expansive rocks.In addition,the micro-mechanism of the phenomena is discussed.The character of rocks from Tongjiezi hydropower station is of importance to engineering behavior,that is expansion of rocks increases the inner stress and shear strength,as well as resistance of water infiltrating because of the decreasing porosity induced by micro-structure change. |
| Keywords: | aniaxial compression swelling rocks micro-mechanical |
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