Abstract:A centrifugal test was conducted on a reinforced embankment on soft clay using the interlayer of a three-dimensional geonet,which was made of high density polyethylene(HDPE) as model geogrid. In combination with the analysis of the photographs taken in flight,the development and distribution of tensions of the model grid were obtained. The strain gauges with epoxy resin were calibrated through continuous loading and multi-stage loading tensile test;and then elastic model and generalized Kelvin model were used to describe the characteristics,respectively. The experimental results show:(1) generalized Kelvin model is suitable to describe the mechanical properties of epoxy resin with the time factor;(2) as the stage of creep process has not been considered,the tension calculated by elastic model is approximately 16% greater than calculated by generalized Kelvin model,and the deviation is varied with the extension rate;and (3) the tension calculated based on the observed photographs is in agreement with that based on the measured strain. It is found that the accuracy depends on the displacement direction and magnitude.