A method for predicting lateral deflection of large-diameter monopile near clay slope based on soil-pile interaction

摘要

Seven soil-pile interactions and four change processes of soil-pile interaction are proposed to predict the deflection of large-diameter monopile near undrained clay slope under a lateral load in this paper. The equations of force and moment are established in each soil-pile interaction, and the predictive load-deflection curves are obtained by solving those equations. The effect of slope and near-slope distance on the p-y curves is considered. The relationship between ultimate soil resistance and depth is divided into two forms according to the near-slope distance, and the ultimate soil resistance varies nonlinearly with the depth. The modulus of horizontal subgrade reaction in front of pile and behind the pile vary bi-linear and constant with the depth, respectively. To evaluate the accuracy of the new method, it is compared with the results of field tests and the finite element analysis. Finally, the method is used to analyze the effect of slope angle, near-slope distance, pile-soil adhesion and base resistance on lateral deflection.