深长摩擦桩竖向变形计算与参数分析

该文针对深长摩擦桩的桩侧摩阻力引起桩底土层的沉降不容忽视 ,通过对Mindlin公式进行积分 ,提出了一种荷载传递法的修正方法。同时对灌注桩桩底沉渣对桩端荷载传递函数的影响进行了考虑。对难以进行现场试验的深长桩提出了利用土的物理力学参数确定传递函数的计算方法 ,对各参数的试验方法及取值进行了详细的分析。并与工程实例进行比较 ,验证了该文方法的可行性。

Calculation and Parameters Analysis of Vertical Deformation of Deep and Long Frictional Pile

In order to consider the settlement of soil underlying pile base caused by shaft resistance of deep and long frictional pile, a revised load-transfer method is introduced through integrating Mindlin's solution in this paper. And the influence of slime present beneath a bored pile base on load-transfer function for pile base is considered. A framework for determining the model parameters from conventional soil tests data has been established for the deep and long pile whose test is difficult to carry out in site.A good agreement between the computed and the measured values of field test confirmed the validity of the proposed approach.