倾斜荷载下基桩C法的幂级数解

在C法(地基系数沿深度呈抛物线形式增加)假设基础上,从弹性桩的基本微分方程出发,考虑P-Δ效应并计入桩侧摩阻力和桩身自质量,推导并得到了倾斜荷载作用下单层均质土中基桩内力及位移的幂级数解.利用该解答对某工程实例进行了分析计算,并与传统的m法计算结果进行比较.结果表明,基于C法的幂级数解计算所得基桩内力及位移规律与工程实际吻合,且基桩最大弯矩和地面水平位移较m法降低10%左右.

Power Series Solution for Pile Based on C-method under Inclined Loads

Based on the basic differential equations of a flexible pile and the C-method assumption,a power series solution of the internal forces and displacements of a flexible pile in a single homogeneous soil was obtained under inclined loads,taking the weight of the pile and its shaft resistance into account.The foundation coefficient was assumed to be parabolic to the depth of subgrade in the C-method.The flexural responses of the pile were compared with the results calculated by the traditional m-method in an engineering example.The results have indicated the internal forces and displacements of a flexural pile calculated with the power series solution are well consistent with those in practical engineering.And the maximum bending moment of the pile and the horizontal displacement of the ground based on C-method have been elevated by 10%,compared with those obtained in m-method.