（1 浙江大学土木系  杭州 310027； 2 杭州天元建筑设计院  311201）
【提要】  考虑了土锚杆和挡土桩的共同作用，对土锚杆抗拔力试验得出的P-s曲线采用最小二乘法进行多项式拟合，求得非线性回归函数，并根据锚杆与挡土桩交点变形协调关系，列出非线性方程组，采用不动点迭代法求解方程组。并给出了工程实例。
【关键词】  土锚杆  挡土桩  共同作用  最小二乘法  非线性回归函数
A Nonlinear Fitting Solution of Combined Actions of Soil Anchor Rod and Earthretaining Pile Wall /Liu Anjun 1，2，Qian Guozhen2，Gong Xiaonan1（1 College of Civil Engineering and Architecture，Zhejiang University，Hangzhou 3
10027，China；2 Hangzhou Tianyuan Architecture Design and Research Inc.，Ltd.，Hangzhou 311201，China）
Abstract:The combined actions of soil anchor rod and earthretaining pile wall are considered. Based on the withdrawal resistance testing P-s curve of soil anchor rod，multinomial fitting P-s curve are doing through the method of the least squares，and the nonlinear regression function is gained. According to compatibility of deformation relationship of the crossing point of soil anchor rod and earthretaining pile wall，nonlinear equations are listed，and equations through fixed point iterative program are worked out. Practical cases are provided as well.
Keywords:soil anchor rod；earthretaining pile wall；combined actions；method of the least squares；nonlinear regression