| 渗流场中岩石流变特性的数值模拟 |
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| 引用本文： | 阎岩,王恩志,王思敬.渗流场中岩石流变特性的数值模拟[J].岩土力学,2010,31(6):1943-1949. |
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| 作者姓名： | 阎岩 王恩志 王思敬 |
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| 作者单位： | 1. 清华大学 水沙科学与水利水电工程国家重点实验室，北京 100084；2. 中国科学院地质与地球物理研究所，北京 100029 |
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| 基金项目： | 国家自然科学基金，科技部支撑计划课题 |
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| 摘 要： | 渗流对岩石的流变特性有显著的影响，但限于试验条件，相关的试验成果较少。而数值计算技术已成为进行岩石力学研究的重要方法，因此，采用数值模拟方法对渗流场中岩石的流变特性进行了研究。对已有的岩石室内流变试验进行模拟来验证数值方法的有效性，在压缩流变试验的数值模拟中对试件分别施加单向、三向渗流场来模拟不同渗流条件对岩石流变特性的影响。模拟结果表明，在渗流方向上渗流产生的动水压力会导致试件的流变变形增大。此外，不同渗流场对流变的影响也有所差异，三向渗流场中试件受到的轴向渗透力小于单向渗流场，而侧向渗透力则大于单向渗流情况，这也导致三向渗流场中试件的轴向应变小于单向渗流场，而侧向应变大于单向渗流场。
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| 关 键 词： | 岩石流变 数值模拟 单向渗流场 三向渗流场 |
| 收稿时间： | 2008-04-10 |
Numerical simulation of rheological properties of rocks in seepage field |
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| YAN Yan,WANG En-zhi,WANG Si-jing.Numerical simulation of rheological properties of rocks in seepage field[J].Rock and Soil Mechanics,2010,31(6):1943-1949. |
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| Authors: | YAN Yan WANG En-zhi WANG Si-jing |
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| Institution: | 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Seepage field has notable influence on rheological properties of rocks; but the related experiment is difficult to achieve because of the limit of test equipment or method. Numerical calculation has been an important method in rock mechanics gradually; in this paper, rheological properties of rocks in seepage field are studied by numerical simulation. First of all, a simulation of an available example is carried out to validate this method. Then, several compression rheological experiments of rock in unidirectional and tridirectional seepage fields are simulated. Based on the simulation results, the dynamic hydraulic force which developed in seepage process will increase the strain of rock specimen in seepage direction. Furthermore, the simulation results show that the axial seepage force in tridirectional seepage field is less than that in unidirectional seepage field; but the lateral seepage force in tridirectional seepage field is larger than that in unidirectional seepage field. Accordingly, the axial and lateral strains have similar regularity. |
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| Keywords: | rock rheology numerical simulation unidirectional seepage field tridirectional seepage field |
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