Study on Bearing Capacity of Reinforced Composite Pipe Pile Group in Reclaimed Stratum under Vertical Load

A new stiffened composite pipe pile was developed for improving the foundation of reclaimed ground in ocean engineering. To study bearing capacity group, a combination field test and finite element method used. Firstly, tests were performed on proposed single pile. The model verified by comparing numerical simulation results with results. load transfer mechanism from core to cemented soil surrounding clarified. Further, 3D group established based model. Finally, stress distribution each analysed influence spacing discussed. showed that axial both side corner piles decreased rapidly an increase spacing, stress-bearing ratio decreased. central increases spacing. smaller larger proportion settlement. optimal design scheme 500 mm diameter, 700 outer between four times diameter (2.8 m) considering economic benefits project. These provide reference construction improvement projects.