FEM Analysis of Long-short-pile Composite Foundation

Based on the finite element method (FEM) analysis of long-short-pile composite foun dation, we discussed the influence of pile modulus and pile length on the stress distribution and the settlement of composite foundation. Analysis showed that the stress of long piles decreased a long with length uniformity while that of short piles decreased rapidly within the top 3 meters; the influence of long and short piles modulus is small; the increase in the length of long piles or rigid short piles could effectively decrease the foundation settlement and enhance the top load, but the increase in the length of flexible short piles had little influence in this respect.