The paper analyzes the elasticity-plasticity of the push-extend multi-under-reamed pile in use of finite element method theory by ANSYS. lt takes three common slopes of push-extend multi-under-reamed piles to study the regularity, which are in the same environment and dimension except for slope. It introduces the realative theory to make the anlysis much more accuracy. The regularity is analyzed which is taken by the software of ANSYS to summarize and can get the reasonable plate's slope to analyze the bearing capacity of push-extend multi-under-reamed pile precisely.
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