关键词: 横向受载桩, 非线性, 综合刚度

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