A new theoretical method to evaluate the upper limit of the retention ratio for the design of geotextile filters in contact with broadly granular soils

Reply to the discussion by Ni et al. on “Analysis of the internal stability of granular soils using different methods”

“…This value is chosen because for fine fractions larger than 35% the coarse particles do not belong to the solid skeleton, but they are immersed in a matrix constituted by the fine particles. For this reason, for the analysis of the soil 11/WF studied by the discusser, the authors suggest using other methods such as the one proposed by Moraci et al (2012a).…”