二次加载对钻孔灌注桩承载力的影响

对两组钻孔灌注桩进行二次现场静载荷试验。对比分析每组试桩的两次荷载沉降Q s曲线 ,总结出二次加载钻孔灌注桩侧摩阻力、端阻力、承载力和刚度的变化规律。试验结果表明 ,静载荷试验后的钻孔灌注桩 ,在桩的承载力达到设计要求情况下能作为工程桩使用。

Influence of the Second Loading on Bored Cast-in-place Pile Bearing Capacity

After the first loading test of two bored cast-in-place piles some days later,these bored cast-in-place piles are imposed the second loading. Analyzing the two load-settlement curves of each pile, the influence of bored cast-in-place pile imposed the second loading on the bearing capacity has been summarized.The result shows that the pile after loading test can be used in practice,if the bearing capacity of it is larger than the adding load.