| 封闭气泡对土体渗透系数影响的试验研究 |
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| 引用本文： | 吴争光,张华. 封闭气泡对土体渗透系数影响的试验研究[J]. 工程勘察, 2012, 0(9): 43-47 |
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| 作者姓名： | 吴争光 张华 |
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| 作者单位： | [1]深圳市岩土工程有限公司,广东深圳518028 [2]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 |
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| 摘 要： | 渗透系数是分析土体渗流问题的重要参数,目前获取渗透系数的诸多方法均没有考虑土体中封闭气泡对渗透系数的影响。本文基于室内一维积水入渗试验结果,拟合出土体渗透系数与体积含水量的经验公式,以及仅包含孔隙率n和两个拟合参数的渗透系数与气相饱和度的经验公式,并通过前人试验结果验证了该公式的正确性。
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| 关 键 词： | 一维积水入渗 封闭气泡 渗透系数 |
Experimental study on the influence of entrapped air to permeability coefficient of soil |
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| Wu Zhengguang,Zhang Hua. Experimental study on the influence of entrapped air to permeability coefficient of soil[J]. Geotechnical Investigation & Surveying, 2012, 0(9): 43-47 |
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| Authors: | Wu Zhengguang Zhang Hua |
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| Affiliation: | 1. Shenzhen Geotechnical Engineering Co. , Ltd. , Shenzhen 518028, China; 2. Key laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang 443002, China) |
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| Abstract: | Permeability coefficient of soil is one of the most important parameters for soil seepage analysis, but the influence of entrapped air on permeability coefficient is not considered in the most methods to obtain the values. Based on the results from one-dimensional ponding water infiltration in laboratory, the relationship between the permeability coefficient and the initial water content is presented, and the formula for the relationship between the permeability coefficient and the degree of saturation in air phase is also proposed, in which only the porosity and two fitting parameters are included. The correctness of the formula is verified by using other experimental results. |
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| Keywords: | one-dimensional ponding water infiltration entrapped air permeability coefficient |
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