Abstract：The model pile with two plates is loaded and unloaded for 5 times in silt and silty clay to study the engineering behavior of pile with plates and branches under repeated loading in different soils. The biggest load is less than the limit bearing capacity. According to the test result，the bearing capacity and deformation characteristic of the pile in different soils are analyzed；and the load transfer behavior and the pressure change of the different places on pile under the two situation are studied，especially the reason why the surface friction between soil and pile under different conditions will appear complex change. For example，in silt with lower water content，the frictional resistance from the soil between plates and pile shows positive one on the upper section，while minus on the lower section. However，in silty clay with higher water content，it is just opposite，minus on the upper section and positive on the lower section. This phenomenon can be explained by the formation，development and failure mechanisms of soil arch under different soil conditions. In addition，the situation and reason of the soil pressure change at different distances away from the plate are analyzed. It is found that the bearing capacity and deformation of the pile with plates and branches are obviously different for different soils，silt is better than silty clay；the mutual effect of pile and soil around it is obviously different and complex. So a lot of studies should be done to understand the project behavior and load transfer behavior of the pile with plates and branches under repeated loading.
