Numeric Simulation of Moment of Stabilizing Pile under the Local Liquefaction Based on Finite Element Method

The evaluation of liquefaction effect on the dynamic moment of stabilizing piles is potentially significant. Based on the dynamic centrifuge modeling of a slope reinforced with a row of copper model pile, this paper not only analyzed the response of dynamic pore pressure, earthquake deformation and macroscopic phenomenon measured in the response of the reinforced slope, but also simulated the response characteristics of dynamic bending moment of stabilizing pile under the condition of local foundation liquefaction by using the dynamic consolidation finite element. Through the comparison of model test and computation, the results show that the local liquefaction in the saturated foundation resulted in the large seismic deformation at slope toe and slope top, and this seismic deformation not only leads to increasing sharply of the dynamic excess bending moment of stabilizing pile, but also makes the post-earthquake residual moment much bigger than the static bending moment before earthquake. So the excess moment of stabilizing pile in liquefiable soil caused by the saturated foundation liquefaction cant be ignored.