Evaluation of capillary barrier system under lateral non-flow condition of sand layer

In recent years, ground disasters such as a collapse of river levee due to infiltration and erosion of rainwater during heavy rain have frequently been occurred. As one solution to that, a capillary barrier (CB) system could be adopted. All of the laboratory model test for the CB in the past researches have been carried out under the lateral flow condition of the sand layer, and its performance from the results has been evaluated. But, when the sand layer changes to impermeable state due to some reasons such as the penetration of fine grained soil, the performance of the CB would be degraded. Thus, this study focuses on the laboratory model test for the CB under lateral non-flow condition. A series of laboratory model tests of the CB under lateral non-flow condition were performed according to the rainfall conditions of 3 patterns of I=20, 50, 100 mm/hr. In addition, the division lengths obtained from the model tests were examined with the results of the infiltration analysis.