Application of variable stiffness leveling design for composite foundation in a frame-core tube structure

It has introduced application of optimized design of pile foundation stiffness to reduce differential settlement for CFG pile composite ground in frame-corewall structure. Only apply ground treatment to the corewall and external frame areas with different CFG pile intervals in order to adjust the stiffness and to control the differential settlement. Raft of variable thickness may be applied after calculation which rationalizes the force on the foundation and improves the economy. Several issues to pay attention to while applying the software PKPM(Version 4.3.4) to optimized design of pile foundation stiffness to reduce differential settlement for actual works have been put forward.