复杂地质条件钢管立柱灌注桩施工技术

钢管柱逆作法在超大超深基坑中的运用越来越广泛,钻孔桩与钢管柱的有效结合,大大缩短了工期并降低造价,而施工中钢管柱的垂直度控制是钢管柱施工质量的重要指标之一。为使钢管柱的垂直度满足设计要求,保证施工质量,通过采用旋挖钻与冲击钻有机结合在复杂地质条件下的钢管立柱灌注桩施工的工程实例,归纳、总结并提出该技术在钢管立柱灌注桩施工的工艺方法和控制措施等。

Construction Technology of Steel Pipe Column Grouting Pile in Complex Geological Conditions

Steel pipe column reverse construction method is more and more widely applied in ultra large and ultra deep foundation pit, by the effective combination of bored pile and steel pipe column, the construction period and cost are greatly shortened. The verticality control is one of the important indicators of the construction quality of the steel pipe column. In order to meet the design requirements on the verticality of steel pipe column and ensure the construction quality, with the engineering case of steel pipe column grouting pile construction by the combination of auger drill and percussion drill in complex geological conditions, the paper summarizes and puts forward the technological process and control measures for reverse construction technology in steel pipe column grouting pile construction.