关键词: 斜桩, 竖向荷载, 变形, 有限元分析, 桩身倾角

Abstract: 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.

Key words: batter pile, vertical load, deformation, finite element analysis, inclined angle