STUDY ON THE VERTICAL BEARING PERFORMANCE OF THE DYNAMIC COMPOSITE PILE RAFT FOUNDATION
In order to study the bearing characteristics of stiff composite pile raft foundation,ABAQUS three-dimen-sional finite element software is used to analyze the response law of stiff composite pile raft foundation under vertical load.Considering the variation of the load-settlement curve under the influence factors of different pile length,pile number,raft thickness,and core pile diameter,the load settlement is normalized.The results show that the corner pile bears a larger load first within a certain load range,and with the increase of load,the central pile will share more load.Under the condition of a certain pile length,the displacement of the pile raft foundation decreases with the in-crease of the diameter of the core pile,and when the diameter of the core pile is constant,the settlement decreases with the increase of the pile length.The thickness of the raft has a certain impact on the vertical bearing performance of the pile raft system,and the thickness of the raft is the best when the thickness of the raft is within 1～1.5d.The re-search may provide the reference for the practical application of engineering and the popularization of the composite pile raft foundation.
strength composite pilepile raft systemfinite element analysisload-settlement curvevertical bear-ing capacity
NETL
NSTL
万方数据
