Lagrangian analysis in simulation for composite foundation with piles in inhomogeneous strata;

Experimental study of piles-cushion-soil interaction of rammed soil-cement pile composite foundation;

Discussion of cushion in composite ground;

Consolidation of composite ground with granular columns under time-dependent loading

The differential governing equations for the consolidation of composite ground with granular columns are established,which can consider the gradual variation of horizontal permeability coefficient of soft soil in a drainage influential zone caused by disturbance during granular column construction.