Abstract: The model pile with two plates was through 5 times repeated load-bearing and load-shedding tests under the limit load and 0.75 times of the limit load, in order to studying the project behavior of piles with plates and branches in silty clay. In addition, taking the simple loading test in silty clay for determining the limit bearing capacity. According to the test results, the bearing capacity and deformation characteristics of the pile in the soil are analyzed; and the pile’s characteristics about load transfer in silty clay, characteristic of pressure changing on different places of pile are studied; especially the reason why the skin friction of the soil to the pile would appear complex changing is analyzed; in addition, the situation and reason of the pressure changing of soil different distances away from the plate during the repeated loading are analyzed too. It is shown that the repeated loading of different intensities loads impact obviously to the convergence of settlement deformation; the mutual effect mechanism of the pile and the soil is quite complex, so a lot of studies should be done to understand the project behavior and load transfer mechanism of the pile with plates and branches under repeated loading.

Key words: pile with branches and plates, silty clay, project performance, loading transfer mechanism, model test