摘要
随着国家基础设施投入的加大,桩径1000－2000 mm、孔深100－130 m的钻孔灌注桩在各类工程中屡被采用。泵吸反循环传统上被用于孔深不超过80 m的深孔,在京沪高铁第六标段娄江特大桥钻孔灌注桩施工中,通过对现有的反循环钻机进行改进,很大程度上提高了泵吸反循环的工作效率,顺利地完成了孔深131 m、桩径1.8 m桩孔的施工,产生了很好的经济效益。
The bored-grouting pile with diameter of 1000~2000 mm and depth of 100~130 m are often used in various projects.Pump-suction reverse circulation was traditionally used in the hole not more than 80 m deep,but by the improvement on the existing reverse circulation drill,the efficiency of pump-suction reverse circulation was greatly improved with pile hole of 1.8 m in diameter and 131 m in depth finished.
出处
《探矿工程（岩土钻掘工程）》
2011年第6期47-50,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
泵吸反循环
大直径
超深孔
灌注桩
钻机改进
pump-suction reverse circulation
large diameter
ultra-deep hole
grouting pile
drilling rig improvement
