Finite Element Computation And Analysis Of The Interaction For Superstructure-Piled Raft Foundation

At present, the main problems of the design for piled raft foundation lie in the controlling settlement of basis (the total settlement and differential settlement), design of the piled raft foundation settlement of the general calculation method were to some extent due to the complexity of the soil there is a big error, designers often set to design safety excessive security reserves, causing unnecessary consumption of resources, to adopt a more consistent with the actual situation of the method of calculating the settlement it is very important. Based on ANSYS piled raft foundation and the upper part of the overall structure of 3D modeling analysis, and through a more complex calculation of its engineering examples settlement. Calculated results and more in line with the actual situation, that the finite element method is applied to calculate the settlement piled raft foundation of ways and means.As piled raft foundation design mainly dominated deformation control design, the paper on the adoption of the finite element method and the structure of the upper piled raft foundation soil and the overall modeling to consider the role of the three interactive foundation settlement. With not consider only the upper structure of the foundation and the foundation to consider the interactive calculation results were compared. Major research as follows:(1) the law of deformation and force for the upper structure, the basis and the piled foundation under the vertical load and the level load; (The interaction of upper structure - foundation)(2) the law of deformation and force for the basis and foundation pile raft under the vertical load and level load; (The interaction of foundation - basis)(3)the analysis for different geological conditions on the basis of the settlement piled raft impact;(4)the analysis different raft thickness on the basis of the settlement pile raft impact;(5) using the finite element method works examples guide the design and analysis (the interaction of piled raft foundation and basis).Through analysis shows the ways of the finite element method analysis of large piled raft foundation, the sharing the load factors of piled raft foundation settlement and pile- soil affecting the determination of the interaction of different analytical methods on the piled raft foundation soil settlement and the sharing of pile load the impact of the use of these conclusions can give a better prediction and guiding role for the design of pile-raft foundation.