基于数值试验的嵌岩桩横向承载力研究

发布时间：2018-04-04 21:11

本文选题：嵌岩桩　切入点：横向受荷　出处：《四川大学学报(工程科学版)》2016年06期

【摘要】：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,验证数值模型的合理性。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,验证所提方法的准确性。采用常用的4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-桩顶位移曲线分析,对不同方法的适用性进行比较,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。
[Abstract]:The loading process of lateral rock-socketed pile was tested by finite element method. The load-displacement curve was obtained in accordance with the loading range of the field test, and the rationality of the numerical model was verified.The complete load-displacement curve is obtained by using numerical model to carry out the loading and failure of the numerical test.Based on the solution method of foundation reaction modulus Ki, the empirical formula of initial slope Kh solution of load-displacement curve is obtained by regression analysis of field test data.The hyperbolic function calculation method of load-displacement curve of laterally loaded rock-socketed pile is presented.The accuracy of the proposed method is verified by comparing with the field test curve.In this paper, four commonly used calculation methods of bearing capacity of laterally loaded rock-socketed piles are used to analyze the horizontal load-top displacement curves expanded by numerical tests, and the applicability of different methods is compared.The hyperbolic function method is suggested to calculate the bearing capacity of laterally loaded rock-socketed piles.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;江苏省岩土工程技术工程研究中心;陕西省交通规划设计研究院;
【基金】：国家自然科学基金重点资助项目(41530637) 中央高校基本科研业务费专项资金项目(2015B17714) 中国交通建设股份有限公司科技研发项目(2012-ZJKJ-11)
【分类号】：TU473.1

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