轴向受力桩的桩周极限摩阻力研究

Study on the utmost friction resistance around axial loaded pile

利用M ind lin解并结合莫尔-库仑屈服准则,采用迭代法进行求解,解决了由于桩周极限摩阻力表达式未知的情况下利用M ind lin解无法积分的缺陷.通过计算发现桩周极限摩阻力受外部荷载的影响极小,甚至可以忽略不计.通过采用不同的桩周土的力学参数进行计算,发现不同的桩周土的性质对桩周极限摩阻力的影响程度不同.其中,土的重度对桩周极限摩阻力影响最大,摩擦角次之,而粘结力相对来说影响最小.

According to the Mindlin solution and Mohr-coulomb yield criterion, iterative method is used to solve the problem that the Mindlin solution cannot be integrated because the utmost friction resistance expression is not known. External loads influence the utmost friction resistance so little that it can be ignored. From the examples, it can be found that the influence extent of utmost friction resistance by different soil around a pile is different. Among characteristic parameters of soil, the gravity influences utmost friction resistance most, cohesion influences least and friction angle between them.