The Preliminary Discussion On Mechanism Of Anti-sliding Pile With Prestressed Anchor Cable

Because the anti-sliding pile with prestressed anchor cable originates from anti-sliding pile, the only difference between them is that the former is set with an amount of prestressed anchor cable. So the former is a compound structure that anti-sliding pile and prestressed anchor cable work-together .That is to say the former's patterns of force is active and rational, the latter's is passive and less-rational. As fast as circumstances will permit, using anti-sliding pile with prestressed anchor cable can minish the area and the length of anti-sliding pile, namely can quicken construction work's steps, reduce construction cost and save investment. These years, this method have come into wide use in port, dock, gallery or drift in mine, deep foundation pit, high slope, landslide and so on. People have already gathered information or experience and achieved something. But the theory about anti-sliding pile with prestressed anchor cable is not mature, because interaction between pile and sliding mass is very complicated.This text carries on numerical analysis to that problem through nonlinear FEM on basis of research, interaction theories and present condition both here and abroad. According to the FEM theories and Object Oriented Programming system (Visual C++6.0) the author of this paper write a FEM application program-PFE(R& S)(the Program of Finite Element for Rock and Soil)- to aim at the anti-sliding pile with prestressed anchor cable. This application program makes use of a large and using widely FEM analytical software ANSYS to quickly create the data document which is used in PFE(R& S) and use VC++ to program post processing procedure. In this application Duncan-chang model is use to simulate soil and rock, linear elastic model is use to simulate anti-sliding pile and anchor cable, interface element is set between anti-sliding pile and sliding mass, initial stress is use to simulate prestress. Then the author founded a nonlinear FEM model about the interaction of anchor cable , anti-sliding pile and sliding mass to analyze their mechanism .At last, we get the regularities of distribution about deformation, bending moment, shearing force of anti-sliding pile, soil pressure ,prestress, and loss of prestress by calculation and reasoning, and also get the regularities of all which are referred above, when the stiffness of anchor cable, width of anti-sliding pile, depth of anchor cable and depth of anti-sliding pile are changed.The results prove that the plane FEM referred in this paper can simulate the...