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首页> 外文期刊>Transport in Porous Media >Permeability of Particle Soils Under Soil Pressure
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Permeability of Particle Soils Under Soil Pressure

机译：土压力下颗粒土壤的渗透性

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摘要

Soil is composed of particles that are condensed and bonded under an overburden pressure during burial. Obtaining the permeability coefficient of soil particles is an important issue in geological, geotechnical and hydraulic engineering. The permeability coefficient has been traditionally obtained by fitting data based on the particle size gradient and soil porosity. However, it is difficult to measure soil porosity, sample at certain depths and maintain the original pressure while sampling in the field and performing tests in the laboratory. The complicated nature of the experimental method results in considerable uncertainty regarding the accuracy of the permeability coefficient. In this paper, soil particles bonded by the force of gravity are modeled, with different pressures at different depths. Permeable soils form at certain depths, and the macroscopic permeability coefficient of the soil is obtained via seepage calculations. A relationship between the upper pressure and the permeability coefficient is established to remove the dependence on the porosity, which is an intermediate coupling parameter between soil particles and seepage. The results show that the modeled permeability coefficient is consistent with the results of previous models, and the permeability coefficient decreases with increasing depth. Thus, the proposed model of soil particle penetration can be directly used to calculate the permeability coefficient.
机译：土壤由在埋葬期间在上覆压力下凝结并结合的颗粒组成。获得土壤颗粒的渗透系数是地质，岩土工程和水利工程中的重要问题。传统上，渗透系数是通过基于粒径梯度和土壤孔隙度拟合数据获得的。但是，在野外采样和在实验室进行测试时，很难测量土壤孔隙度，在一定深度进行采样并保持原始压力。实验方法的复杂性质导致有关渗透系数准确性的不确定性。在本文中，对在重力作用下结合的土壤颗粒进行了建模，并在不同深度施加了不同的压力。在一定深度形成渗透性土壤，并通过渗流计算获得土壤的宏观渗透系数。建立上部压力与渗透系数之间的关系以消除对孔隙度的依赖性，孔隙度是土壤颗粒与渗流之间的中间耦合参数。结果表明，所模拟的渗透系数与以前的模型结果一致，渗透系数随深度的增加而减小。因此，所提出的土壤颗粒渗透模型可以直接用于计算渗透系数。

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