| 水对三峡库区滑带（体）土直剪强度参数的弱化规律研究 |
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| 引用本文： | 李维树,夏 晔,乐俊义.水对三峡库区滑带（体）土直剪强度参数的弱化规律研究[J].岩土力学,2006,27(Z1):1170-1174. |
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| 作者姓名： | 李维树 夏 晔 乐俊义 |
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| 作者单位： | 1. 长江科学院 水利部岩土力学与工程重点实验室，湖北 武汉 430010；
2. 长江科学院重庆岩基研究中心，重庆 400014；3. 重庆市涪陵区水利电力局， 重庆 涪陵408000 |
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| 摘 要： | 通过对三峡库区典型滑带不同状态的原位直剪对比试验,研究了粘土、粉质粘土及土石混合体三类滑带（体）土在不同含水状态下的直剪强度参数及c，φ值随含水率的变化规律。在大量的数据基础上建立了滑带（体）土c，φ值与含水率之间的经验关系，分析了水对不同性质的滑带（体）土的作用机理，得出了蓄水或者含水率变化后滑带（体）土c，φ值的经验公式，量化了含水率变化（水位涨落）对直剪强度参数的弱化程度。
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| 关 键 词： | 三峡库区 滑带（体）土 c φ值 含水率 弱化程度 |
| 收稿时间： | 2006-06-25 |
Research on softening rule of direct shear strength parameters
of soil of slide zone in Three-Gorge Reservoir Region caused by water |
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| LI Wei-Shu,XIA Ye,LE Jun-yi.Research on softening rule of direct shear strength parameters
of soil of slide zone in Three-Gorge Reservoir Region caused by water[J].Rock and Soil Mechanics,2006,27(Z1):1170-1174. |
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| Authors: | LI Wei-Shu XIA Ye LE Jun-yi |
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| Institution: | 1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute，Wuhan 430010, China；2.Chongqing Rock Foundation Research Center Yangtze River Scientific Research Institute，Chongqing 400014, China；3.Water Resources and Hydropower Bureau of Fuling District Chongqing, Fuling 408000, China |
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| Abstract: | According to the contrastive in-situ direct shear test of the slide zone in the Three-gorges Reservoir Region in different conditions, changed rule of direct shear strength parameters and the value of c andφ which change along with water content about three kinds of soil of slide zone in different water contents conditions, such as clay, silty clay and the earth-rock aggregate, is researched. Experimental relationship between values of c andφ and water conyenton soils of slide zone is established based on plentiful data; and functionary mechanism of different characterized soil of soils zone caused by water is analyzed; then experimental formula of value of c and φ when water is sluiced or water content changes; finally softening degree of direct shear strength parameters caused by water content(water level changing) is quantified . |
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| Keywords: | Three-Gorges Reservoir Region soil of slide zone values of c andφ water content softening degree |
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