| 考虑低速非Darcy渗流的饱和黏性土一维固结分析 |
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| 引用本文： | 鄂建,陈刚,孙爱荣. 考虑低速非Darcy渗流的饱和黏性土一维固结分析[J]. 岩土工程学报, 2009, 31(7): 1115-1119 |
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| 作者姓名： | 鄂建 陈刚 孙爱荣 |
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| 作者单位： | 江苏省地质调查研究院；中国地质大学环境学院；江苏省地质工程勘察院； |
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| 摘 要： | 介绍并分析了非Darcy渗流模型,修正了Terzaghi一维固结模型并进行了数值计算,分析了固结过程以及超静孔压消散的规律,认为超静孔压的缓慢消散是导致次固结现象的原因之一。讨论了起始水力梯度、临界水力梯度、瞬时荷载以及土层厚度对固结过程的影响,提出了确定非Darcy渗流适用范围的公式。
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| 关 键 词： | 黏性土 一维固结 非Darcy渗流 起始水力梯度 临界水力梯度 |
One-dimensional consolidation of saturated cohesive soil considering non-Darcy flows |
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| E Jian,CHEN Gang,SUN Airong. One-dimensional consolidation of saturated cohesive soil considering non-Darcy flows[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(7): 1115-1119 |
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| Authors: | E Jian CHEN Gang SUN Airong |
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| Affiliation: | 1.Geological Survey of Jiangsu Province Nanjing 210018 China 2.School of Environmental Studies China University of Geosciences Wuhan 430074 China 3.Geo engineering Investigation Institute of Jiangsu Province Nanjing 210012 China |
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| Abstract: | A non-Darcy flow model is introduced and analyzed.With the model,Terzaghi’s one-dimensional consolidation model is modified,and a numerical calculation is used to solve the new Terzaghi model.The regular pattern of consolidation process is analyzed and the results indicate that the excess pore water pressure dissipated slowly is one of the causes of the secondary consolidation.The effect of the initial hydraulic gradient,critical hydraulic gradient,instantaneously applied load and soil thickness on consolidation process is discussed,and the formula to determine the scope of application of non-Darcy flows is introduced. |
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| Keywords: | cohesive soil one-dimensional consolidation non-Darcy flow initial hydraulic gradient critical hydraulic gradient |
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