超长钻孔灌注桩桩端注浆施工工艺探讨

Research on Tip Grouting Construction Scheme of Super-long Bored Pile

对于超长钻孔灌注桩,通过增加桩长和直径来提高单桩容许承载力的发展空间是非常有限的,桩端注浆是一种有效的方法。文章简要介绍了桩端注浆提高承载力的作用机理和桩端注浆施工注意事项,详细介绍了桩端注浆施工工艺。

For the super-long bored piles,the development space is very limited by increasing the pile length and diameter to increase the bearing capacity of single pile.Tip grouting is an effective way to increase bearing capacity.This paper briefly introduced mechanisms with tip grouting to improve the bearing capacity and tip grouting construction notes.The tip grouting construction scheme were detailedly described in the paper.