【摘要】 根据新乡、巩县及扬州等地钻孔灌注桩桩底压力灌浆现场试验和桩的静载试验，介绍了桩底压力灌浆的工艺及压力灌浆的效果，并对压力灌浆提高钻孔灌注桩承载力的机理进行了分析，对其推广应用作了介绍。更多还原

【Abstract】 Based on the in situ pressure grouting experiments and the full scale pile tests of Xinxiang and Ligou and Yangzhou bridges, the process and effect of jet pressure grouting are presented in this paper.The mechanism of increasing the performance of bored piles by grouting is also analyzed.An engineering experience of applying the new technique is presented in the paper.更多还原