PORE PRESSURE PROPAGATION AND GROUND SETTLEMENT OF CLAY GROUND TRAPPING LOCAL SAND LAYERS

Abstract

In constructing an embankment on clay ground trapping local sand layers, the generated excess pore water pressure is propagated to the surrounding ground through the sand layers. In the present study, a series of model loading tests was conducted to investigate the propagation of the excess pore water pressure and consolidation behavior. The test results showed that the excess pore water pressure in the sand layers delayed the consolidation in the surrounding clay ground and that in some cases the clay ground was heaved by the excess pore water pressure propagated from sand layers. In addition, the effect of the time difference of loading and number of sand layers on consolidation behavior was experimentally investigated.