后注浆技术在超长冲孔灌注桩施工中的应用

The application of post-grouting technology in the pile raft foundation construction of high-rise building

文章介绍了灌注桩桩端后注浆技术的国内外研究现状并结合工程实例对灌注桩后注浆施工工艺及施工过程中的问题处理措施进行了阐述,指出后注浆技术能够消除普通灌注桩桩底沉渣等固有缺陷,具有提高承载能力和桩身质量等优点,且提出一些建议,对类似工程具有一定参考价值。

The paper introduced the present research situation of the pile--end post--grouting technology of bored pile. Combined with practical work, the post grouting technology of bored pile,its technological process and the measurement of the problem during the construction were de- scribed, it is pointed out that the post--grouting technology has several advantages, such as eliminating the inherent defects resulting from the sedi- ment at the end of the ordinary pile, improving the bearing capacity of piles, improving the quality. Meanwhile, some suggestions on post--grouting technology are put forward.