Application of Substructure Method in Anti-Slide Pile with Prestressed Cable

On the basis of the existing methods for computing the anti-slide pile with prestressed cable,we regard the pile below the slip surface as the substructure and deduce the stiffness matrix by using of the theory of structural matrix analysis. The stiffness matrix is treated as the boundary condition of the pile above the slip surface. Then the analysis on plane system of beams for the pile above the slip surface is made. Accordingly,the cable,anti-slide pile,and rock-soil surrounding the pile below the slip surface are regarded as a whole,therefore the prestressing force of prestressed cable can be adapted based on different load condition so as to guarantee rationalization of anti-slide pile supporting long-time load.