2024 Volume 80 Issue 18 Article ID: 24-18052
Inclined capillary barriers (CB) are an efficient slope disaster prevention technology to control rainfall infiltration, which using an upper finer soil layer and a lower coarser soil layer to com-pose layered grounds. Therefore, CB has the function to block rainwater infiltration and to act as a drainage function in grounds. Moreover, it has been found that crushed shell particles can be used instead of general coarser soil layers in CB.The purpose of this paper is to evaluate the rainfall infiltration control function of shellshaped CB, which have been attracting attention as a countermeasure for improving the stability of embankments and embankments during short duration heavy rainfall, which has been increasing in recent years. Crushed shells, which are a component of shell type CB, have a flat particle shape, and their anisotropic permeability and pore connectivity coefficient, one of the unsaturated infiltration characteristics, have not been clarified. In this study, two parameters that can reproduce the measured results were numerically and experimentally identified through laboratory experiments and saturated-unsaturated seepage flow analysis.
