Finite Element Analysis on Vertical Bearing Capacity of Bored Pile with Pile-toe,Pile-shaft and Post-grouting

Based on static load test results,with consideration of the small-strain stiffness characteristic of soils the bearing capacity of bored piles with pile-toe and pile-shaft post-grouting have been analyzed using HS-small model of Plaxis program.The analyses reveal that the small-strain stiffness of soil is not negligible in analyzing pile and soil interaction;with post-grouting,the interface between pile and surrounding soil were strengthened and the relative sliding displacement in between was reduced,end resistance of pile was enhanced and could be mobilized at earlier stage with smaller sliding displacement.As a result,the performance of bored pile was improved with increased bearing capacity and reduced settlement.