Abstract: On the basis of analysing nonlinear passing force mechanism for the laterally loaded pile, this paper proposes a series of calculation models which describe the nonlinear procedures of pile-soil action. Some actual examples show that the main calculated engineering indexes, i. e. the deflection and the slopes of elastic curve of a pile at the ground surface, the maximum bending moment and its position,are in good agreement with those of the field measurement.Furthermore, according to the studies on the models of nonlinear subgrade reaction coefficients, we know more about the main characteristics of the pile-soil reaction throughout the whole loading process, that is, composite stiffness of pile-soil action will decrease nonlinearly with the increase of the lateral load, while the biparameter increases nonlinearly.

Key words: laterally loaded pile, nonlinear, composite stiffness

摘要： 目前,国内外分析横向受载桩的非线性方法主要是p-y曲线法,其实质仍是地基反力系数法。由于它所确定的曲线及参数往往不甚可靠,因而桩在地面处的挠度、转角、桩身最大弯矩及其所在位置等的计算值与实测值,不能同时很好吻合。本文提出的分析方法,能够较好地解决上述问题,并获得令人满意的结果。

关键词: 横向受载桩, 非线性, 综合刚度