| 非饱和渗流基质吸力对边坡稳定性的影响 |
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| 引用本文： | 黄润秋,戚国庆.非饱和渗流基质吸力对边坡稳定性的影响[J].工程地质学报(英文版),2002,10(4):343-348. |
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| 作者姓名： | 黄润秋 戚国庆 |
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| 作者单位： | 成都理工大学地质灾害防治与地质环境保护国家专业实验室,成都610059 |
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| 基金项目： | 国家自然科学基金重大研究计划项目资助 (批准号 :90 10 2 0 0 2 ) |
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| 摘 要： | 降雨入渗是致使边坡岩土体稳定性下降并最终导致崩滑地质灾害发生最为常见的环境因素。通常对边坡中地下水的影响分析采用的是经典的静水压力假定 ,并考虑适当的折减系数。本文研究了非饱和土强度随基质吸力变化的规律 ,对基质吸力影响边坡稳定性的机制进行探讨 ,并提出了相应的分析方法。运用上述方法分析了某露天矿边坡实例。结果表明 ,该方法十分有效。
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| 关 键 词： | 基质吸力 非饱土 边坡稳定 摩尔-库仑定律 |
| 收稿时间： | 2002-08-03 |
| 修稿时间： | 2002年8月3日 |
THE EFFECT OF UNSATURATED SOIL SUCTION ON SLOPE STABILITY |
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| HUANG Runqiu,QI Guoqing.THE EFFECT OF UNSATURATED SOIL SUCTION ON SLOPE STABILITY[J].Journal of Engineering Geology,2002,10(4):343-348. |
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| Authors: | HUANG Runqiu QI Guoqing |
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| Institution: | College of Environmental and Civil Engineering, Chengdu University of Technology, Chengdu 610069 |
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| Abstract: | It is evident that the rainfalls has a remarkable effect on slope stability, but it is generally analyzed by static pore water pressure theory based on saturated soil. Actually, in most cases, the soil, especially the coarse soil and rocks, is discovered to be unsaturated or has a process from unsaturated to saturated state during rainfall. Therefore, a new slope stability analysis approach is necessary based on unsaturated soil theory. In this paper, the effect of unsaturated soils suction on slope stability is discussed from basic Mohr-Coulombs shear strength model. Based on that we suggest a modified GLE method considering suction for unsaturated slope. This method was used to an open pit mine slope and it revealed some basic laws of suction on slope stability. The slope safety factor from this new GLE method is higher than that from traditional one, but it has a bigger decrease in the process from saturated to unsaturated state and the final safety factor when the seepage being over is smaller than that from general pore water pressure theory. |
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| Keywords: | Suction Unsaturated soil Slope stability Mohr-Coulomb rule |
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