Nonlinear settlement computation of the soil foundation with the undisturbed soil tangent modulus method

According to the in-situ plate loading curves,the relation of the tangent modulus of undisturbed soil with the stress level was set up and then the undisturbed soil tangent modulus of different points in soil could be computed based on its stress level.Using this tangent modulus of undisturbed soil in the layer-wise summation method to compute the foundation settlements,it was shown that the results agreed well with the observations.