【摘要】 为准确地测定土壤渗透系数,采用能态学的观点,分析了双环入渗法和环刀法测定土壤饱和渗透系数时饱和土体中压力势的分布规律,根据达西定律定量研究了双环入渗法和环刀法测定土壤渗透系数的计算方法。结果表明,土壤饱和渗透系数大于双环入渗法测定的稳定入渗速率;当采用双环入渗法和环刀法测定土壤的饱和渗透系数时,土壤剖面土壤水压力势分布规律不同。因此,这2种测定方法对应的计算饱和渗透系数的公式也不同。更多还原

【Abstract】 In order to measure the soil permeability coefficient accurately in term of energy,the distribution law of pressure potential in saturated soil was analyzed based on two-ring infiltration method and cutting ring method,and the two calculation methods were researched on the basis of Darcy’s Law.The results showed that the permeability coefficient was larger than the stable infiltration rate determined by using two-ring infiltration method.The distribution law of pressure potential in saturated soil using two-ring infiltration method to determine the permeability coefficient was different to that using cutting ring method.So the calculation equations of permeability coefficient that correspond to the two kinds of determination methods were different.更多还原