The Numerical Modeling Analysis Of Pile-anchor Supporting For One Deep Foundation Pit On Beijing

Pile-anchor supporting structure is one of the most common structure for foundation pit,it is not complex to analysis the deformation of pile when tell you how the stress distributed on pile.Because of the soil is consisted with three components,the mechanical properties of soil is complex.the anchor' tension is from the soil and the tension will influence the soil' stress distribution.Now The Notional Foundation Pit Standard advice the soil and water pressure can separate consider them or only consider the soil pressure,but they all ignore the tension from the seepage flow and the result is different with true pressure frequently.This dissertation is divided into two parts:Firstly,express the mechanism of action for anchor and the cooperation of pile and anchor.Secondly,based on the engineering example,calculate the pile' stress and deformation with different ways--only consider the soil pressure or separate consider soil and water pressure.Then simulation and analysis by LiZheng and Plaxis.Lastly,by comparing the monitoring date of foundation pit and the different calculation results,analysis the differences and the appropriateness of the methods.For this project,the displacement of pile come from Plaxis is similar with the monitoring date than other computational methods;the pile' stress is more accurate when consider the seepage flow;the elastic method to calculate the pile' stress is more accurate than classic method.