Abstract：In order to more reliably calculate the displacements and internal forces of anti-slide piles，the pile-soil composite stiffness under combined action and subgrade resistance tri-parameter method is presented to calculate anti-slide piles. Based on this method，numerical solution of link finite element is established. According to the measurements of displacements and bending moments of an engineering pile pushing test，the pile-soil composite stiffness under combined action and subgrade resistance tri-parameter are back analyzed. Then the calculation results obtained by finite element analysis are compared with the measurements of pile displacements and bending moments under different load grades. The results show that the horizontal resistance parameters of rocks and soils are nonlinear. With the increase of pile displacements caused by larger loads，the horizontal subgrade resistance parameters obviously decrease and the pile-soil composite stiffness under combined action diminishes to a certain extent.
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2014, Vol. 33 
