Settlement Study And Optimize The Design Of Composite Pile Foundation

Composite foundation of composite piles is emphasized and widely accepted by all over the country because of its security and economical efficiency.Displacement and optimum design about composite foundation of composite piles are studied, which consists of broken stone pile and CFG pile.Through analyzing field static test curve, the curve is sectional feature and the ratio of permanent deformation to total deformation is big.Displacement formula for composite foundation of composite piles is derived by considering the coaction of foundation soil, broken stone pile, CFG pile and bedding cushion and by applying the theory of elastic-plastic mechanics, which is proper for superstructure being constructed.Generation and development processes of upper and under stab wound amount are reasonably analyzed by utilizing slip line field theory. Furthermore it points out that it is unreasonable that minor pore expansion theory is applied to the generation and development process.Optimum design model about composite foundation of composite piles is constructed which is under the dual control of bearing capacity and displacement by applying optimization theory.