The working mechanism of two-stage variable stiffness composite pile foundation is somewhat different from that of conventional pile raft foundation and natural foundation.In order to understand the stress and deformation of pile and foundation soil during construction and use,field monitoring data such as foundation soil pressure,pile top pressure,reinforcement stress,elastic support deformation and settlement deformation of two-stage variable stiffness composite pile foundation of a super high-rise office building were statistically analyzed.The development and change law of the above data in the process of layer by layer construction loading were studied,and compared with the theoretical calculation results.The results show that the measured results of the foundation reaction are less than the theoretical calculation value,which verifies the reasonableness of the design of the two-stage variable stiffness composite pile foundation,thus verifying the concept of variable stiffness levelling of pile raft foundation.
维普
万方数据