Evaluation of ultimate bearing capacity of Y-shaped vibro-pile

来源期刊：中南大学学报(英文版)2008年第z2期

论文作者：王新泉 陈永辉 林飞 卢孝益 张霆

文章页码：186 - 194

Key words：Y-shaped vibro-pile； circular pile； Mindlin stress solution； ultimate bearing capacity of pile tip； static loading test

Abstract: Based on Mindlin stress solution, a numerical computational method was proposed to calculate the stresses in the ground induced by side friction and the resistance of Y-shaped vibro-pile. The improved Terzaghi’s and ЪерезанцевВ Г’s methods for ultimate bearing capacity evaluation were proposed by considering the stress strength induced by friction resistance at pile head level of Y-pile. A new method to calculate the ultimate bearing capacity of Y-pile was also proposed based on the assumptions of soil failure mode at the tip of Y-pile and the use of Mohr-Coulomb soil yield criterion and Vesic compressive correction coefficient with the induced stresses in the ground. Based on the comparisons with the field static load test results, it is found that the improved Terzaghi’s method gives higher ultimate capacity, while the other two methods shows good agreement with the field results.