Numerical Analysis for Bearing Capacity of flexible Pile Composite Foundation Influenced by Distance between Piles

The bearing performance of composite foundation improved by flexible piles is influenced directly by distance between piles. It is simulated by the finite element method ANSYS to find out the regularity of bearing performance of composite foundation improved by flexible piles. Results show that: (1)loads shared by piles is decreased but loads shared by soils between piles is increased in the composite foundation improved by flexible piles, during the process, the settlements both of piles and soils between piles is increased, in which the settlement of soils between piles shows the non-linear tendency obviously; (2) there is the critical value of distance between piles in the composite foundation improved by multi-flexible-piles, the pile soil stress ratio is minimum.