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当考虑桩侧土体非线性本构关系时对水平受荷桩的计算一般需采用数值方法,解析结果相对较少。基于Winkler地基模型和桩侧土体简化的弹塑性本构关系,对均质地基中水平荷载作用下桩头嵌固的长桩进行了解析推导,得到了桩身最大挠度及最大弯矩与荷载关系的统一解析表达式,并采用相同的方法求得高桩情形下桩头挠度的计算式。计算表明,联合荷载作用下桩身泥面处的挠度和转角不等于单个荷载作用时的线性叠加,采用常规的线性叠加法计算将偏于不安全。所求解析式借助计算器即可进行最大挠度和最大弯矩的计算,大大方便了工程的计算应用。
When considering the nonlinear constitutive relation of pile-side soil, numerical calculation is usually required for the calculation of horizontal piles. The analytical results are relatively few. Based on the elasto-plastic constitutive relationship between the Winkler foundation model and the soil simplified at pile side, the long pile embedded in pile head under horizontal load in homogeneous ground is analyzed and derived. The maximum deflection and the maximum bending moment of pile body are obtained. And the same method is used to obtain the formula of pile head deflection under high pile condition. The calculation shows that the deflection and the corner of the pile surface under the combined load are not equal to the linear superposition of the single load, and the calculation by the conventional linear superposition method will be unsafe. Calculated with the help of calculators can calculate the maximum deflection and maximum bending moment, which greatly facilitates the engineering calculation and application.