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随着高层建筑和重负荷工业厂房的增多,将大量采用大直径(>φ60cm)灌注桩基础。目前,这种桩的成孔方法较多,但都离不开专用机具。贵州省机械化施工公司结合贵州地区喀斯特地基的特殊情况,创建了用履带吊进行高能量、低频率干法冲孔的新工艺,顺利地完成了贵阳卷烟一厂主厂房工程φ850、φ1000、φ1250、φ1300共42个桩成孔任务,总进尺510.22m,孔深达23m,并嵌入中风化岩层1m以上,保证了该工程施工要求。现已推广到其他工程中应用。该法所用冲孔机为15t吊车,吊杆长为13～
With the increase of high-rise buildings and heavy-duty industrial plants, a large-diameter (>φ60cm) cast-in-place pile foundation will be widely used. At present, there are many methods for forming holes in such piles, but all of them are inseparable from special equipment. The Guizhou Provincial Mechanized Construction Company combined with the special conditions of the karst foundation in Guizhou Province created a new process of high-energy, low-frequency dry punching with caterpillar cranes, successfully completing the main workshop of Guiyang Cigarette Factory φ850, φ1000, φ1250, Φ1300 A total of 42 piles were drilled into holes, with a total footage of 510.22m, a hole depth of 23m, and embedded in the weathered rock formations of more than 1m, which ensured the construction requirements of the project. Has been promoted to other projects. The punching machine used in this method is a 15t crane with a boom length of 13~