Abstract：Considering the side frictional force and the soil thrust behind pile, with nonlinear side horizontal elastic soil resistance distribution, the buckling stability analysis for tapered pile in slopes was discussed based on Rayleigh-Ritz method to obtain the formulation of critical buckling load for tapered pile in slopes. The effects of slope angle, distribution of soil thrust behind pile, pile embedded ratio, side frictional force and pile insertion ratio on buckling stability for tapered pile in slopes were analyzed. The results show that compared with equal diameter piles, the critical buckling loads for tapered piles in slopes are increased for different varying rates of pile diameter when pile tip diameter keeps constant. The critical pile buckling load is increased with the increasing of varying rate of pile diameter. Slope angle, pile embedded ratio and pile insertion ratio have significant effects on the buckling stability for tapered pile in slopes. The side frictional force is helpful to increase the critical pile buckling load, but the improvement extent is limited. The effects of the value and distribution of soil thrust behind pile on the critical pile buckling load is tiny. Both of them can be neglected.
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2021, Vol. 42 
