Proceedings of the Deep Mixing 2015 Conference, (DFI)
Research on the Stability Analysis of TDM Column Composite Foundation Supported Embankment
Chao Yan, Southeast University, China; Song-yu Liu, Southeast University, China; Yong-feng Deng, Southeast University, China
In order to investigate the stability of embankment on soft subgrade improved by T-shaped deep mixed column composite foundation, the internal forces and failure modes of columns were analyzed on the shape of critical slip surface and the displacement fields of composite foundation through strength reduction method of three dimensional numerical simulation. Then comparison between T-shaped and conventional deep mixed column composite foundation were conducted. The simulation results indicate that the stability analysis was overestimated by limit equilibrium methods. Piles within the slope shoulder provide great resistance slide effect through the vertical bearing capacity, while the piles nearby slope shoulder and outside slope shoulder providing great moment to resistant slip. The embankment stability of T-shaped deep mixed column composite foundation is higher than that of conventional deep mixed column composite foundation while cost less cement and construction time.
|article #2024; publication #1013 (DM-2015)|