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目前关于双层弹塑性地基中水平受荷桩的解析计算研究相对较少。基于地基反力法和桩侧土体简化的弹塑性本构关系,推导了双层非均质弹塑性地基中桩顶自由水平受荷长桩的闭合形式解,得到了桩侧土体塑性区厚度、桩身最大挠度和最大弯矩的计算式。通过参数的特殊取值,所得解与现有单层地基中水平受荷桩的相关解完全一致,同时也验证了解析推导的正确性。算例分析表明本文解析解计算结果与三维有限元模拟结果及现场试验实测值吻合较好,可较有效地开展双层地基中水平受荷长桩的计算分析。
At present, there are relatively few analytical studies on horizontal loaded piles in two-layered elastic-plastic foundations. Based on the elasto-plastic constitutive relation between the foundation reaction force and the soil simplified at the pile side, the closed form solution of the free-standing piles under two-layer inhomogeneous elastic-plastic foundation is deduced. The plastic zone Thickness, pile deflection and maximum bending moment of the formula. Through the special values of the parameters, the obtained solutions are completely consistent with the related solutions of the horizontal piles under the existing single-layer foundation, and the correctness of the analytical derivation is also verified. The case study shows that the analytical results of this paper are in good agreement with the results of the three-dimensional finite element simulation and the field test, which can be used to calculate and analyze the horizontal long-pile under double-layered soil.