Study of PVD effect on modulus of subgrade reaction

Abstract

The basic strength parameter that is important for use in designing pavement is the modulus of subgrade reaction (k). Increase in k-value can be obtained by soil improvement using preloading and PVD (Prefabricated Vertical Drain). The method that can be used to get the k-value is the plate load test using plates with a diameter of 304.8 mm in soil conditions without PVD and with PVD with a distance of 100 mm and 150 mm. The results obtained from the plate load test are settlement and pressure and then graphed. The k value is based on a pressure of 69 kN/m2 which determines a certain settlement. The most significant increase in the modulus of the subgrade reaction is that the soil mounted by PVD is 100 mm apart, an increase of 80.73%. Whereas for the soil installed PVD 150 mm increases by 56.24%. Based on this, soil with PVD with a closer distance gives a more significant increase in modulus of subgrade reaction.