关键词: 道路工程；岩土工程；倾斜桩基；桩间距；桩身倾角；桩顶沉降；桩侧摩阻力

Abstract: The finite element software ABAQUS was used for numerical simulation and comparative verification of indoor model tests. Under the conditions of different inclination angles (0°, 5°, 8°, 12°) and different pile spacing (2.5d, 3.0d, 4.0d, 5.0d, 6.0d), the variation characteristics of the load-settlement (Q-S) curve, frictional resistance of pile side (q), vertical displacement (U) and bending moment (M) of pile body were analyzed under vertical graded loading of inclined and vertical pile groups. The results show that when the vertical load (Q) is small, the Q-S curve of inclined group piles shows a linear relationship, and gradually transforms from linear to nonlinear with the increase of Q value. The larger the Q value is, the more obvious the nonlinearity is. The relationship between q and Q is nonlinear; under the same Q value, the working performance of q of inclined pile foundation is different from that of vertical pile foundation. In the vertical pile foundation, there is Umiddle pile> Uside pile> Ucorner pile, and the vertical displacement difference gradually decreases with the increase of pile spacing (l). In the inclined pile foundation, when l is small, there is Uangle pile < Umiddle pile < Uside pile; when l is large, there is Uangle pile

Key words: highway engineering; geotechnical engineering; inclined pile foundation; pile spacing; inclination of pile body; pile top settlement; pile side friction