Abstract: Based on the unified strength theory and the cavity expansion theory,the compaction effects of the tubular pile are studied in this paper.The elasto-plastic analysis solution of the stress field and displacement field of the soil around the pile is given.The relationships between plastic zone,the limit expansion pressure,the radial stresses and the parameter b are also obtained from analysis.According to numerical results,the effect of intermediate principal stress on compaction effects of the tubular pile ...