等截面单桩抗拔承载性状试验研究

Test and Research on Anti-lift Properties of Single Pile with Uniform Cross Section

摘要:

在基坑中对等截面单桩进行了抗拔静载试验，在桩身设置应变式钢筋计，成功测得桩身各截面的应变数据。分析试验所得数据，对试验抗拔桩抗拔系数的取值、侧摩阻力的发挥、混凝土桩身的开裂等进行了探讨，相应给出了抗拔桩的设计建议。

关键词:基坑;抗拔桩;等截面单桩;抗拔承载力;侧摩阻力;长螺旋灌注桩

Abstract:

Anti-lift static test was made on single pile with uniform cross section in foundation pits. Strain type steel device was installed on the pile and the strain data on different section in pile were measured successfully. Discussion on value of anti-lift coefficient of test piles, development of lateral friction drag and cracking of concrete pile body were made. The design suggestions about anti-lift piles were given out.

Key words:foundation pits; anti-lift piles; single pile with uniform cross section; anti-lift capacity; lateral friction drag; llong helix bored piles