【摘要】 通过沈阳砂土地区旋挖成孔抗拔桩的现场静载试验、钢筋应力测试等试验,研究单桩抗拔承载能力、侧摩阻力的分布规律,得出以下结论:按地层年代划分土层确定侧摩阻力比按岩性名称划分更为合理;压浆前、后增强段侧阻力增强系数约在1.15~1.62之间;扩径支盘现象可以使局部摩阻力发挥较大,但也限制了其下部一定桩长范围内摩阻力的发挥。更多还原

【Abstract】 Through static load test,inforcement stress tests and other tests on uplift pile in Shenyang sand area,study the uplift pile bearing capacity and lateral friction,and get the following conclusions:according to the soil division by stratigraphic to determine the lateral friction is more reasonable than the soil division by lithology;before and after grouting,the lateral friction enhancement factor is about 1.15 to 1.62 in the enhanced part;the effect of branches and plates can partly improve the lateral friction,but also limit the lower lateral friction in certain length range of the pile.更多还原