The Research On Loading Capacity And Deformation Of Guiding Hole Pile Using Cement-soil Pile

In recent years,a large number of high-rise building construction put forward higher requirements on bearing capacity of foundation.It is particularly important for foundation reinforcement and improvement.Guiding hole pile using cement-soil pile is improved in the development approach based on PHC pipe piles,suitable for ground of deep dense sand.The improvement of loading capacity of guiding hole pile using cement-soil pile is not obvious compared with the pile using the normal technology.The improvement of loading capacity of guiding hole pile using cement-soil pile by measuring UCS is nearly 70 percent compared with the pile using the normal technology,and the results have been used in the practical engineering.But theoretical research on Guiding hole pile using cement-soil pile is relatively less now.This paper analyzes the Load transfer law and mechanism of the improvement of loading capacity.The main research and achievements are as follows:(1)Based on the static load test data,curve fitting and predict of loading capacity of guiding hole pile and the normal technology can be made by the hyperbolic model,and the related calculatingequations are presented.(2)On the basis of on-site static loading test of guiding hole technology using cement-soil pile and the normal technology,this paper analyzes the loading capacity and the interactive behavior of the pile and soil by finite element software.Further more,it is discussed in detail for changing regularity of side soil resistance,and the calculation formula of loading capacity of guiding hole pile is given.(3)According to the results of finite element calculation,the appropriate parameters of standardization will have no obvious aggregation of guiding hole pile using cement-soil pile load displacement curve and normalized to a single curve is selected.(4)The influence factors are calculated by the finite element analysis of cguiding hole pile using cement-soil pile foundation settlement,given the natural foundation settlement calculation based on cement soil pile hole general expression of settlement.