The Analysis Model of Pile-soil Interaction for the Double-row Anti-slide Piles Structure and its Application

The mutual effects between piles and slope in two parts of the anti-slide piles and slope system,bounded with the sliding surface,is proposed by considering the most unfavorable condition;in addition,the p-y curve method is used to describe the nonlinear contact of the pile and the soil between back pile and front pile.Therefore,a nonlinear interaction model for double-row anti-slide piles and soil with some parameters which determined by traditional earth pressure method and triaxial test in some certain stress path is established.Based on this,the differential equations of pile sections with different characteristics are deduced,so the inner force and displacement of double-row anti-slide piles can be obtained by finite difference solution with the consideration of the tie beam's coordinating action.Finally,Comparing to the measured data of the model test in laboratory,the calculation result shows that it is feasible for adopting the finite difference solution to analyze the double-row anti-slide piles.