| 软岩的多轴力学特性及其对拱坝的影响 |
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| 引用本文： | 胡昱,刘光廷.软岩的多轴力学特性及其对拱坝的影响[J].岩石力学与工程学报,2004,23(15):2494-2498. |
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| 作者姓名： | 胡昱 刘光廷 |
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| 作者单位： | 清华大学水利水电工程系,北京,100084 |
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| 基金项目： | 清华大学“985”科研基金(082100100)资助项目。 |
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| 摘 要： | 与单轴试验相比，在多轴条件下，软岩(尤其是遇水软化的砾岩)的强度和刚度均有所提高。尝试利用多轴非线性模型，将砾岩在多轴应力条件下的试验成果应用于实际工程，使仿真计算结果更接近实际情况。由于考虑了围压对岩石刚度有提高的影响，非线性计算结果更安全一些，但这不足以弥补砾岩因泡水降低弹模带来的影响。此外，通过对比双轴与常规三轴试验成果，得出在低围压应力区可用双轴试验结果代替三轴试验结果的结论，既简化了试验又便于量测。
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| 关 键 词： | 岩石力学 多轴试验 非线性模型 软岩 砾岩 |
| 文章编号： | 1000-6915(2004)15-2494-05 |
| 收稿时间： | 2003-1-3 |
| 修稿时间： | 2003-2-21 |
BEHAVIOR OF SOFT ROCK UNDER MULTIAXIAL COMPRESSION AND ITS EFFECTS ON DESIGN OF ARCH DAM |
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| Hu Yu,Liu Guangting.BEHAVIOR OF SOFT ROCK UNDER MULTIAXIAL COMPRESSION AND ITS EFFECTS ON DESIGN OF ARCH DAM[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2494-2498. |
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| Authors: | Hu Yu Liu Guangting |
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| Abstract: | The strength and rigidity of soft rock are improved under multiaxial condition compared with those under uniaxial condition. In the paper,nonlinear model is adopted,multiaxial experiment results of soft rock are applied to practice,and the numerical simulation agrees better with the reality. The calculation result is safer by considering the improvement of rock rigidity under confining pressure,but the improvement can not make up the loss of rock rigidity caused by immersion. In addition,comparison of the results of biaxial and normal triaxial experiments shows that in low stress zones the former can replace the latter. This conclusion simplifies experiment and facilitates measurement. |
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| Keywords: | rock mechanics multiaxial experiment nonlinear model soft rock |
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