深圳地区抗拔桩的工程特性试验研究

Experimental Investigation on the Engineering Properties of Uplift Piles in Shenzhen Area

对深圳地区某工程抗拔静载荷试验成果进行了深入的分析,得出试桩的U~δ曲线为缓变型,常规抗拔试验测得的桩身轴力沿桩身向下递减传递,而自平衡试桩法测得的桩身轴力在桩身加载处最大,沿桩身递减传递,桩侧摩阻力在第一级荷载即传遍桩身,随测试方法不同,发挥速率略有不同,但总体上变化规律相似。

This paper took deeply analyzed to the engineering properties of uplift piles in Shenzhen area,and obtained U and δ curve of test pile changed slowly,axial force of pile shaft was descending down the pile body by conventional pull-out test,but was the largest at pile loading place and passed along the pile shaft decrease by self-balanced testing method,also pile shaft resistance passed around the pile body under the first level load,its rate was a little different along with the different test method,however,changing law was similar on the whole.