Size effect of foundation on modulus of sub grade reaction in clayey soil

In the practical design procedure, use of Terzaghi equation to determine the modulus of sub grade reaction for exact foundation is common, but there are some uncertainties in utilizing such equation. In this paper the effect of size of foundation on clayey sub grade with use of finite element software (Plaxis 3D) is proposed to investigate the validation of Terzaghis formulation on determination of sub grade reaction modulus. Also the comparison between Vesics proposed equation, Terzaghis one and obtained results are presented.

Keywords:

Winkler model , Modulus of subgrade reaction , Terzaghis equation , Foundation , Plate load test