Application of Wall Protection with Grouting Under-borehole in Long-spiral Bored Cast-in-situ Pile on Sandy Aquifer

Abstract:

The paper discussed the reasons of bored hole collapsing in sandy aquifer construction with long-spiral driller and the technological principle of wall protection with grouting under-borehole with an engineering case; and also introduced the application and effect of this technology in long-spiral bored cast-in-situ pile, the application limit for long-spiral bored hole pile was broadened.

Key words:grouting under-borehole; long-spiral; sandy aquifer; wall protection; bored cast-in-situ pile