Based on the framework of the FEM, the three-dimensional numerical analysis for evaluating the efficiency of pile groups of large diameter bored cast-in-place pile is conducted in this paper. The effect of the pile numbers and pile spacing on the efficiency of pile groups is obtained by studying the ultimate bearing capacity behavior of different arrangements of pile groups under vertical loading. Then they are compared with the calculated results gained by the formula of the efficiency factor of the pile groups based on superimposed stresses. The findings can serve as a reference for the design of large diameter bored cast-in-place pile.
Study on the ultimate bearing capacity of a strip footing influenced by an irregular underlying cavity in karst areas