Test study on the thickness of the soil layer under the plate affecting the compression failure of the concrete expanded-plate pile

In this paper, the influence of the thickness of soil layer under the plate on the failure behavior of soil surrounding the pile and the bearing capacity of a single pile under vertical compression in the complex soil layer is studied. In the test study, the small model test method of undisturbed soil with a new half-section pile is adopted, which not only solves the question that by the original full-section pile the whole failure behavior of soil surrounding pile cannot be clearly seen, but also solves the defection that burring soil test cannot ensure soil characteristics according to the actual condition of the construction site. By comparing and analyzing the results of finite element analysis the reliability of the test results was checked. The study results will provide a reliable theoretical basis for the design and application of the concrete expanded-plate pile, promote the popularization and application of the concrete expanded-plate pile and look forward to achieve larger social and economic benefits.