基于有限元模拟的楔形桩水平承载特性研究

Research on Horizontal Bearing Characteristics of Wedge Pile Based on Finite Element Simulation

通过abaqus,对砂土中水平承载的楔形单桩和群桩进行数值模拟,主要研究了楔形角对于楔形桩水平载荷下的承载特性的影响,以及楔形桩群桩水平承载特性对于楔形角的敏感性。研究发现:与等截面直桩相比,在楔形角为1°时,楔形桩的水平承载能力要低16%;等体积的楔形桩的水平承载力要大于等截面直桩,提高大约6%。楔形角每减0.2°,楔形桩的水平承载能力就提高将近4%。随着楔形角的增大,楔形桩桩身的弯矩变化速率则增大。群桩工况下,发现在小范围内,随着楔形角的增大,群桩水平位移也不断在增大,但位移群桩效应系数没有明显变化。

The influence of wedge angle on the horizontal loading characteristics of wedge-shaped single posts and cluster posts in sandy soil through ABAQUS was mainly investigated in the present study,as well as the sensitivity of the horizontal loading characteristics of wedge-shaped posts to the wedge angle.Found that the horizontal load-bearing capacity of wedge-shaped posts was 16%lower when the wedge angle was 1°compared with equal cross-sectional straight posts;The horizontal load-bearing force of equal volume wedge-shaped posts was greater than that of equal section straight posts,an improvement of approximately 6%.For every 0.2°reduction in wedge angle,the horizontal loading capacity of wedge Posts increased by almost 4%.With the increase of wedge angle,the moment changing rate of wedge post increased.Under the condition of group posts,it was found that the horizontal displacement of group posts was constantly increasing with the increase of wedge angle in a small range,but the effect coefficient of displaced group posts did not change obviously.