(同济大学土木工程学院地下系  上海 200092)
［提要］  提出一个预测抗拔桩筏基础非线性变形的简化分析方法，方法将桩假定为相互作用的非线性弹簧，使用双曲线函数拟合抗拔单桩的荷载-位移曲线，并将其用于桩筏基础的变形分析中，使用相互作用系数方法分析桩桩的相互作用。与室内群桩模型试验和现场群桩试验结果的比较说明，方法不但可以节省计算时间，而且计算结果与实测结果也比较吻合。
［关键词］  桩筏基础  抗拔  相互作用系数  非线性 
Approximation Analysis Method of Deformation for Tension Piled Rafts/Sun Xiaoli, Yang Min, Zhu Bitang(College of Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract:An approximation method that can predict nonlinear deformation for tension piled rafts is proposed. Piles are modeled as interacting nonlinear springs. The deformation curves of the pile load test can be matched by the hyperbola function. The interaction between piles is analyzed by interaction factors. Comparing with the results of model pile groups and the filed pile groups, it is shown that this method can save a large amount of computing time and the results are reasonable.
Keywords:piled raft; tension pile; interaction factors; nonlinear