Belled wedge piles with enlarged wedge base through grouting or ramming present high material usage ratio

and benefit the side friction and tip resistance comparing to those of traditional equal section piles. However

few studies focused on quantitative analysis of improvement ratio of vertical bearing capacity of the new type pile. The vertical bearing capacities of belled wedge piles

the load-settlement curve

the distributions of side friction and tip resistance

and load share ratio were measured in sandy and clayey soils. The vertical bearing capacities of traditional belled pile with the same concrete volume were compared as control. The results show that the ultimate bearing capacity of belled wedge pile is nearly 1.25 times that of traditional belled pile embedded in sand. The ultimate bearing capacities of belled wedge pile and traditional belled pile increase 11.1% and 66.7% when they are embedded in clay than in sand

respectively.