端夯扩桩的效果

Effect of end-tamper enlarging pile.

本文介绍了南京某工程采用端部夯扩的锤击沉管灌注桩,以提高单桩承载力。为验证其效果,进行了不夯扩、一次夯扩和二次夯扩的单桩垂直静载荷试验,试验结果表明,夯扩桩的效果显著,其承载力分别提高70％和110％。

This paper introduces the end-tamper enlarging type of hammer-sinking cast-inplace pile. This can enhance the single pile bearing capacity. In order to testify its effect, we proceed single pile vertical static load test of no tampering-enlarging, once tampering-enlarging and twice tampering-enlarging types. The testing result shows that the effect of tampering-enlarging piles is evident. The bearing capacities of once and twice tampering-enlarged piles are enhanced 70％ and 110％ respectively.