Numerical simulation of large diameter hollow pile bearing performance

Construction technique of large diameter hollow pile was analyzed. Through the MARC program, large diameter hollow pile was analyzed with simulation method. In the model, the soil was assumed to be elastic-plastic material; contact interfaces among pile, injected cement and soil were submitted to Coulomb-Friction-Law. It was shown that the pile performs end resistance and skin friction behavior, the end resistance occupies a significant proportion in bearing capacity, the contribution of injected cement equals to half thickness concrete. The performance comparison of hollow pile with solid pile was carrier out. The simulation results agree with the actual test data, which proves the model to be appropriate.