Centrifuge model tests on super-long piles with large diameters considering mudcake effect

Based on the centrifuge model tests,the bearing and deformation characteristics of super-long piles with large diameters considering mudcake effect were studied.It was shown that the ultimate shaft resistance of piles considering mudcake was about 65%～85% of that without mudcake and the ultimate bearing capacity decreased about 20%.The effect of pile diameters,pile lengths and bearing stratum on ultimate bearing capacity and shaft resistance was studied.The shaft resistance degraded under heavy load.The shaft resistance of super-long piles degraded little with the increasing diameters in mucky clay.The shaft resistance decreased with the increasing embedded depth in a soil layer at a given depth and could be expressed as the function of h/R.