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The Study of the Nonlinear Working Mechanism of Pile Group

Li Xiongwei et al.  
The nonlinear working progress of group pile foundation is studied by means of model tests and numerical simulations.The results are just as follows: on the one hand,when the group pile foundation is working to the critical state,the soil between the piles will slide around the pile,and the counteraction of the pile will heighten the limit bearing capability of soil-the Δf_u is acquired;on the other hand,in the condition of large pile space,the pile bearing capability reaches limit earlier.Then,the soil under cap takes part in working,adequately and bears the following load,and the whole group pile foundation indicates a limit state of soil bearing.In the mean time,soil and pile bearing capability is definite.
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