砂土中齿桩抗拔特性模型试验研究

为研究齿桩的抗拔承载特性,开展了缩尺模型试验,针对齿部结构的层数与长度变量进行了11组试验研究。结果表明:齿桩相比光面桩表现出更优异的抗拔性能,齿距、齿长与模型桩的抗拉拔承载力都呈现正相关;在一定的弹性承载阶段,模型桩的抗拔承载力随着齿层数的增加呈线性增大;齿长相比于齿层数对模型桩的抗拔承载力和抗拔侧摩阻力均具有较大的影响。试验及分析结果对小改截面桩的研究运用具有一定的借鉴意义。

Model Test on Pullout Resistance Characteristics of Multi-tooth Pile in Sand

To investigate the pull-out load-bearing characteristics of multi-tooth pile, we conducted scale model test of the tooth structure with varied number of tooth layer and tooth length. Our findings reveal that multi-tooth structure exhibits superior pull-out performance compared with smooth pile. Tooth pitch and tooth length are positively correlated with the pull-out bearing capacity of the model pile. At a certain elastic load-bearing stage, the pull-out bearing capacity of the model pile grows linearly with the increase of the number of teeth. Tooth length has a greater influence on the pull-out bearing capacity and the uplift side frictional resistance of the model pile than the number of teeth. The findings offer reference for the research and application of piles with small modified section.