基于数值试验的嵌岩桩横向承载力研究

采用有限元法对横向受荷嵌岩桩的现场试验加荷过程进行数值试验，获得和现场试验的加载范围内结果一致的荷载－位移曲线，验证了数值模型的合理性。并采用数值模型开展数值试验加载直至破坏，从而获得完整的荷载－位移曲线。基于已有的地基反力模量Ki 的解答方法，对现场试验数据进行回归分析，得出了荷载-位移曲线初始斜率Kh求解的经验公式，给出横向受荷嵌岩桩荷载-位移曲线的双曲线函数理论计算方法。通过与现场试验曲线的对比，验证了所提出方法的准确性。采用常用的四种横向受荷嵌岩桩承载力计算方法，对经过数值试验扩展的水平荷载-桩顶位移曲线开展分析，对不同方法的适用性进行了比较，建议采用双曲线函数法对横向受荷嵌岩桩的承载力进行计算。

Study of Lateral Bearing Capacity of Rock-Socketed Piles Based on Numerical Tests

This paper simulated the process of field loading test for laterally loaded rock-socketed piles by finite element method. The load displacement curves obtained were consistent with the field test results within the loading range, and the rationality of the numerical model is verified. Continues load increment was done until the pile failed using the numerical model to generate a full load - displacement curve. Based on the existing foundation reaction modulus Ki solution method, regression analysis was carried out with the field test data and the empirical formula of the initial slope Kh of the load displacement curves was obtained. Hence, a hyperbolic function theory for load displacement curve of laterally loaded rock-socketed piles was proposed. The accuracy of the proposed method was verified by contrasting with the field test curves. Using the conventional four laterally loaded rock socketed pile capacity calculation method, the numerical test was extended through laterally loaded pile top displacement curves analysis to carry out analysis of the applicability of the different methods. The method of hyperbolic function was suggested for calculation of the bearing capacity of rock-socketed laterally loaded piles after comparing the various methods.