斜桩的受力变形性状相比直桩要复杂得多,为了分析斜桩在竖向荷载作用下的承载变形性状,采用有限元分析的方法对竖向荷载作用下斜桩的承载变形以及桩-土相互作用进行了研究,分析了桩身倾角对斜桩竖向承载变形及桩-土相互作用的影响。结果表明:桩身倾角越大,斜桩桩顶沉降和水平位移也越大;桩身弯矩主要出现在桩身上半部分,随着桩身倾角增大而增大;斜桩桩前桩-土接触压力沿深度先增大后减小又逐渐增大,桩后桩-土接触压力从零压力点逐渐增加后迅速减小,一定深度后又逐渐增加,桩前与桩后的桩-土接触压力最大值随桩身倾角增大而增大;深度2.5 m以上,桩前侧摩阻力随桩身倾角增大而增大,深度2.5~6.5 m的桩前侧摩阻力衰减的程度随桩身倾角增大而增大,深度6.5 m以下桩前侧摩阻力随桩身倾角增大而减小;桩身倾角越大,桩后零摩阻力区段越长,零摩阻力区段以下的桩后侧摩阻力越小。

The bearing deformation behavior of batter pile is much more complex than that of vertical pile. Finite element method was employed to study the bearing deformation and pile-soil interaction of batter pile under vertical load. The influence of inclination angle on the vertical deformation and pile-soil interaction was also analyzed. Results suggest that with the increase of inclination angle, the settlement and horizontal displacement of batter pile top both increased; the bending moment of pile body mainly occurred in the upper part of the pile and increased with the increase of inclination angle. In front of the batter pile, the contact pressure between pile and soil firstly increased and then reduced and finally increased gradually along the depth direction; while behind the batter pile, the contact pressure gradually increased from zero and then decreased rapidly until reaching a certain depth, and then increased gradually again; The maximum contact pressure both in the front of and behind batter pile increased with inclination angle increasing. Moreover, side friction increased along with the increase of inclination angle above the depth of 2.5m; whereas between 2.5m and 6.5m, the degradation of side friction intensified with the increase of inclination angle; and below 6.5m depth, side friction reduced with the increasing inclination angle. In addition, with the increase of inclination angle, the segment of zero friction elongated; and below the segment of zero friction, the side friction decreased.