In light of the technical difficulties existed in deepwater large-diameter super-long group piles foundation,the article discusses the mechanism of improving the pile end s bearing capacity by pile bottom grouting,introduces the technology,materials and construction process of pile bottom grouting,and analyzes its effect,in order to promote the application of pile bottom post-grouting technology.

Based on a special shaped single pylon cable-stayed bridge on the foundation of group piles, the program for FEM calculation is adopted for dispersion of the beam grillage system at the footing and for structural analysis and calculation of the group pile foundation.

Through centrifugal model tests respectively made for 18 and 64 piles of group pile foundations,the load-settlement curves and pile shaft axial force distribution are obtained.

Further,taking the pier supported by group pile foundation as a spatial system, the paper developes a three dimension analysis program to compute the natural frequency of the system which is computationally feasible for various practical cases.

Numerical analysis on post-construction settlement of pile group foundation for Taizhou Yangtze River Bridge

Seismic simulation and analysis of bridge in the deep water pile group foundation under Airy waves

The Mechanical analysis of the pile group foundation of a continuous frame bridge were conducted with a ANSYS soft,which is a Large General soft on FEM(Finite Element Method).