Numerical Analysis On Bearing Mechanism Of Super-long Group Piles Under Vertical Load

During the design of pile-raft foundation, there still exist many problems because the research on theory of piles' load-transfer mechanism is far behind the development of practice. With the development of super-long buildings, it is necessary to massly use super-long piles because of their high bearing capacity. However, the abuse of super-long pile results in a waste of money, energy and resource. So, the main purpose of this paper is to deal with the load-transfer mechanism of super-long pile and find out the different properties between super-long piles and piles.In this paper, based on a three dimensional nonlinear numeric model of the coupled finite element—infinite element—interface element, a program written by MATLAB is used to analyze the bearing and deformation mechanism of pile-raft foundation under different pile length, the number of piles and so on. All the results can be output by figure according to different uses and the users can edit all the figures freely.In the end, several pieces of advice about the design of pile-raft foundation are proposed.