Numerical analysis on effect factors of vertical load-settlement curve of pile groups

Based on the analysis and comparison of a pile group testing model using numerical simulation in 3-dimension,a pile group with embedded cap are modeled,and the load-settlement property of the pile groups under vertical load are revealed by numerical simulation method,and the influence factors on load-settlement curves of pile group foundation are analyzed,which indicates that pile length(ratio of length to diameter),pile spacing(ratio of spacing to diameter),shear spring stiffness between pile and soil,stiffness of soil at the pile end,pile cap stiffness and the setting type of pile cap affect the curves obviously,while pile stiffness affects little.