Clogging Evaluation of Permeable Bases
Clogging Evaluation of Permeable Bases
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DOI：
10.1061/(asce)0733-947x(2003)129:3(309
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发表时间：
2003-05
期刊：
影响因子：
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通讯作者：
Siew‐Ann Tan;T. Fwa;Chong-Teng Han
中科院分区：
文献类型：
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作者：
Siew‐Ann Tan;T. Fwa;Chong-Teng Han
外来颗粒对渗透基内空隙的堵塞会严重降低渗透基的排水能力。这反过来又会减少路面内透水基层的使用寿命。本文研究了几种透水基层混合料堵塞对其垂向渗透率的影响。所使用的堵塞材料是沙子和残余土壤的混合物。从Kozeny-Carmen方程导出了一个经验理论公式，以预测可渗透碱的渗透率降低。该方程用可渗透基底试样的初始垂直渗透率、孔隙率、堵塞材料的保留量和实验经验系数表示。发现该系数取决于渗透基的D-sub-15尺寸与堵塞材料的d-sub-85尺寸的比值以及堵塞材料的均匀性系数C-sub-u。将理论预测与实验结果进行了比较，结果吻合较好。
The clogging of the void spaces within the permeable base by foreign particles can severely reduce its drainage capacity. This will, in turn, reduce the service life of the permeable base layer within the pavement. In this paper, the reduction in the vertical permeability of several permeable base mixes as a result of clogging was studied. Clogging materials used are mixtures of sand and residual soil. An empirical theoretical formulation has been derived from the Kozeny-Carmen equation in order to predict the reduction in permeability of the permeable bases. The equation has been expressed in terms of the initial vertical permeability of the permeable base specimen, porosity, amount of clogging material retained, and an experimental empirical coefficient. This coefficient is found to be dependent on the ratio of the D-sub-15 size of the permeable base to the d-sub-85 size of the clogging material and coefficient of uniformity, C-sub-u, of the clogging material. The theoretical predictions were compared with experimental results with good agreement.