| 孔隙介质的渗透特性初探 |
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| 引用本文： | 张我华,薛新华.孔隙介质的渗透特性初探[J].岩土力学,2009,30(5):1357-1361. |
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| 作者姓名： | 张我华 薛新华 |
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| 作者单位： | 1. 温州大学,建筑与土木工程学院,温州,325035;浙江大学,软弱土与环境土工教育部重点实验室,杭州,310027
2. 浙江大学,软弱土与环境土工教育部重点实验室,杭州,310027 |
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| 摘 要： | 孔隙的存在是岩土类介质材料结构的本质特征，它不但改变了岩土体的力学特性，而且严重影响着岩土体的渗透特性。大多数经典的渗流理论中，多孔介质模型都假定孔隙率和渗透系数是与时间无关的材料常数。实际上由于淘涮、侵蚀、冲刷等原因，它们是随时间和坐标变化的，同时又与孔隙中的压力、流速等因素有关。基于孔隙率和损伤变量之间的定量关系，从连续损伤力学的角度对多孔介质岩土材料的渗流力学特性进行了研究。首先，对传统的达西定律形式进行修正，提出了孔隙介质完备有效的达西定律（模型）；然后，对该模型中渗透参数的特性进行了讨论和分析，得出了一些有益的结论。
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| 关 键 词： | 孔隙介质 渗透系数 达西定律 损伤力学porous media permeability coefficient Darcy law damage mechanics |
| 收稿时间： | 2007-09-11 |
Primary study of permeability of porous media |
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| ZHANG Wo-hua,XUE Xin-hua.Primary study of permeability of porous media[J].Rock and Soil Mechanics,2009,30(5):1357-1361. |
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| Authors: | ZHANG Wo-hua XUE Xin-hua |
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| Institution: | 1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035 China ; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The existing of voids is the nature characteristic of the porous media, which not only alters the mechanical character of the rock masses, but also affects their permeabilities. Most of the porous media models in the past regard the porosity and permeability coefficient as the constant which were irrelevant to the time constant. In fact, they varied with time and coordinates due to erosion, and other reasons. At the same time, the porosity and permeability coefficient were relevant to the pore pressure and velocity of the porosity water. From the continuum damage mechanics point of view, the mechanical permeability properties of the porous media were studied based on the quantitative relationship between the porosity rate and the damage variables. First of all, the traditional Darcy law was modified, and the complete effective Darcy law (model) inside the complete and effective seepage field in porous media was derived. Then, the model’s properties of permeability parameters were discussed and analyzed. Finally, some useful and valuable conclusions are drawn. |
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| Keywords: | porous media permeability coefficient Darcy law damage mechanics |
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