计入桩侧摩阻力非线性特性的基桩承载力分析方法

讨论了桩侧摩阻力发挥特征,以双曲线模型建立基桩荷载传递基本微分方程,并导得了可考虑桩土相互作用及土体分层性质的幂级数解.利用本文解答对某大桥试桩资料进行了数据拟合与计算分析,结果表明,双曲线拟合相关系数均在0.96以上,且用本文解答得到的基桩轴力计算值与实测结果吻合较好.该方法参数拟合简便,计算精度较高,可用于工程实践.

Calculation Method for the Bearing Capacity of Pile by Considering the Nonlinear Character of Side Resistance

The behavior of the side resistances was discussed,and based upon the hyperbola model,the differential equation was established in the load transfer method.Considering the character of the layered stratum and pile-soil interaction,the exact solution was obtained by power series.A pile test data was analyzed in this method,and the result indicated that the correlation coefficients were more than 0.96 when fitting the load transfer curve in hyperbola,and the calculating value of axial force agreed well with the measurement. In this method,we have easily obtained parameters with high precision,which can be applied in engineering practice.