论文标题
在间隙级的颗粒土壤中计算局部渗透性
Computation of local permeability in gap-graded granular soils
论文作者
论文摘要
本文提出了半分析方法，以使用空间时间域反射测定法，基于大型同轴细胞渗透器中局部孔隙率的间接测量来获得颗粒状土壤的局部渗透性。孔隙度曲线用于使用改良的Kozeny-Carman和Katz-Thompson方程获得局部渗透率，该方程融合了有效的颗粒直径，该颗粒直径占通讯器内的颗粒迁移。比较了从提出的方法获得的局部渗透率的曲线，并使用压力测量和流速进行实验获得的渗透率分布进行了比较。用建议的方法获得的渗透率与实验获得的渗透率相当，并且在一个数量级偏差范围内，这对于实际应用而言是可接受的范围。
This paper proposes semi-analytical methods to obtain the local permeability for granular soils based on indirect measurements of the local porosity profile in a large coaxial cell permeameter using spatial time-domain reflectometry. The porosity profile is used to obtain the local permeability using the modified Kozeny-Carman and Katz-Thompson equations, which incorporated an effective particle diameter that accounted for particle migration within the permeameter. The profiles of the local permeability obtained from the proposed methods are compared with experimentally obtained permeability distributions using pressure measurements and flow rate. The permeabilities obtained with the proposed methods are comparable with the experimentally obtained permeabilities and are within one order of magnitude deviation, which is an acceptable range for practical applications.
