There are hundreds of soil model

but there are no model which can describe the true features of soil because soil is too complex. In order to describe all the characters of soil

we have to join lots of model parameters. However

too many model parameters of soil make the model can not be used in practice. From engineering practice

the best model is that its form including to obtain the parameters is simple

but it can describe the concerning problems. Based on the relationship of e-p curve and e-lgp curve

a simplified calculation method of oedometric modulus of soil is established. And Poisson ratios of different kinds of soils are assumed different constant values. So a simplified soil model

which can describe the settlement and the vertical stress accurately

is presented. The calculated results of engineering case show the rationality of the method.