Interaction Mechanism and Application of Grouting in Pile Bottom

The grouting in pile bottom could improve the mechanical propertie of pile base,thus to raise the vertical loading capacity.Based on the in-situ pressure-grouting experiments and the full-scale pile tests of one project,the process and effect of jet pressure-grouting are presented here.The mechanism of increasing the performance of bored piles by grouting is also analyzed.An engineering experience of applying the new technique is presented at last.