Improvement On Elastic Theory Method For Single Pile

Pile foundation a important kind of foundation, has the characteristics of big bearing capacity and small settlement. It can be used in traffic,port,industrial and civilian architecture,ocean engineering etc. In the design of pile the calculation of bearing capacity and settlement is most important of all. The main theory methods used in analyzing pile settlement includes: load transfer approach,layer-wise summation method,elastic theory method,shearing deformation transfer approach,finite element method and experiential methods.One of those method—elastic theory method has the advantages of more accurate theory base and convenient to calculate etc. But there are still a litter lacks, so it is necessary to study the elastic theory method further.The main research work of this paper includes: First, systematically analysis and study of classical elastic theory method research work further, deduce the single pile calculate formulation of elastic theory method and compile the calculate program; Second, further, consider calculate model of pile-soil slippage, deduce calculate formulation and compile the calculate program; Third, want to improve the elastic theory method's calculate precision, we can improve on the classical elastic theory method by consider that the pile frictional resistance of every pile cell is not uniformity but linear, then deduce calculate formulation; Last, pile, in elastic theory method, is not really embed into soil, so it's not agree with the practicality. Because of this, we can use both elastic theory method and finite element method to calculate pile of different long-radius ratio, by contrast the different results, put forward corresponding modify factor.