Abstract: A new incremental transfer model of pile-soil interaction is presented on the basis of the disturbed state concept(DSC), and the load transmission mechanism is analyzed as well. According to the result obtained with Matlab, the influence law of the model parameters to the relationship between and is analyzed. It show that, the parameter has a decisive influence on the pile-soil interface strength, reflect the concentration degree of the pile-soil interface element strength distribution, which means that the hardening, softening and elastic plastic characteristics of pile-soil interface can be described by choosing the proper parameter. The parameters and have relatively smaller influence on interface strength, since the change in the parameters only has effect on the maximum value of shaft resistance. The greater the parameters and , the greater the extreme value of the lateral frictional resistance, but it has little influence on the shape of the curve. The parameter can affect both the strength interface and curve in a certain way, the greater the peak intensity of , the higher the interface strength, the smaller the interface displacement corresponding to the peak of the lateral frictional resistance. Due to the fact that the theoretical curves agree well with the curves from static loading test, it has a certain guiding significance on engineering practices.

Key words: disturbed state concept (DSC), pile-soil interaction, gradualness, load transmission function;