Down-the-hole Hammer Combined with Auger Drill in the Pile of Rock Foundation

Abstract:

Down-the-hole hammer was used in the pile of rock foundation with auger drill, which not only make the most of DTH hammer in small diameter construction in hard, fragile, broken layer and auger drill in large diameter construction with high speed but also developed the field in rock foundation, and raised the efficiency of auger drill used for pile of rock foundation in mid-hard layer. This case provided the relative technique and experience.