关键词: 斜桩, 侧向刚度, 轴向刚度, 群桩, 荷载分担

Abstract: Due to the carrying capacity of horizontal load, battered piles were generally used in the foundations of bridge, wharf and transmission power line. The horizontal and vertical load sharing of piles is not only force decomposition, which is related with the axial and lateral stiffness of inclined and vertical piles. The influence of axial and lateral stiffnesses coupling should be considered in the analysis of inclined group piles foundation. According to the studies of the axial and lateral stiffness of inclined and vertical piles and the analysis of load sharing of group piles, the force characteristics of battered pile foundation were gained. First, the lateral stiffness of positive inclined pile is biggest; and the lateral stiffness of vertical pile is bigger than that of negative inclined pile. Second, the influence of pile length on the axial stiffness is very significant. When the pile was lengthened, the axial stiffness was increased; and the differences between axial stiffness and lateral stiffness were expanded. Last, most of the vertical load was borne by the axial force of piles. When the ratio of axial stiffness and lateral stiffness is small, most of the horizontal load was borne by the lateral force of piles. When the ratio of axial stiffness and lateral stiffness is large, most of the horizontal load was borne by the axial force of piles. At the same time, due to the inclined angle of pile is small, the large axial force is created to resist horizontal load

Key words: battered pile, lateral bending stiffness, axial compressive stiffness, group piles, load sharing