Study on settlement calculation of deformable piles composite ground under flexible foundation

Research shows that flexible pile composite foundation has effective length.Firstly,according to the distribution form of skin friction on pile,the formula for calculation effective length is derived by shear displacement method under the assumption that pile and soil satisfy deformation compatibility condition.Secondly,compressed layer of composite foundation is divided into three layers for calculation.Amount of compression in reinforced area is calculated based on elastic theory,and calculation method for substratum settlement of composite foundation is set up by using Mindlin’s stress solution.Then,settlement calculation method for flexible pile composite foundation under flexible foundation is developed by studying the determination of related parameters value.Finally,the method was used to analysis the practical engineering and compared with the traditional method,and the result showed that this method proposed here was feasible and reasonable.