The triaxial rheological tests are carried out on Suzhou lacustrine soft soil; according to the results of test

S-6

K-B and K-S rheological models are used to describe the rheological characteristics of the soil. In the inversion of model parameters

it is found that the fitting accuracy of initial deformation by S-6 model is not enough; and the fitting accuracy of medium-term deformation by K-B model is not enough; the fitting results of K-S model are the best. Therefore

K-S model is used to study the rheological properties of Suzhou lacustrine soft soil. In order to determine the parameters of model better

the concept of stress ratio is introduced in the practical application of the model

and it is found that

there are exponential relationship between stress ratio and model parameters; based on this

we can select the model parameters according to different engineering stress conditions. At last

the model is used for the settlement calculation of practical engineering; the results show that K-S model has high fitting precision

and it can be used to guide the region's project construction.