潜孔锤旋挖钻机组合在基岩桩施工中的应用

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

空气潜孔锤钻进工艺和旋挖钻机钻进工艺相结合，充分发挥了潜孔锤对硬、脆、碎基岩地层施工小口径速度快的优越性，也发挥了旋挖钻机施工大口径速度快的优越性，同时也拓宽了旋挖钻机对中-硬基岩施工的领域，提高了旋挖钻机施工中-硬基岩桩基的效率，为旋挖钻机施工类似中-硬基岩提供了技术参考和经验借鉴。

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.