NUMERICAL SIMULATION RESEARCH ON THE CUSHION LAYER EFFECT OF CONCRETE CORE PILE COMPOSITE FOUNDATION

摘要

Study on the concrete core pile composite foundation is still in the initial stage now, so it is necessary to carry on a more comprehensive research for it. Influence of cushion on the concrete core pile of composite foundation was analyzed by using numerical simulations method in this paper, and the elastic modulus of cushion layer and thickness to control of the settlement and stress influence was analyzed. The results show that: with the increase in modulus of cushion layer, pile-soil stress ratio can be accommodated to reduce the overall settlement of the composite foundation, however, when the module of cushion layer increases to a certain value, regulation tends to be stable; Similarly, the increase in thickness is also conducive to the regulation of pile-soil stress ratio, when the thickness increases to a certain value, regulation tends to be stable.