钻孔灌注桩“旋挖+冲反”施工工艺特点及质量控制  

Construction Technology of Rotary Excavating and Percussive Reverse Circulation Excavating for Bored Piles

作　　者：杨晖彬 刘涛 

机构地区：[1]上海市建设工程监理有限公司,上海200080 [2]上海建科工程咨询有限公司,上海200072

出　　处：《施工技术》2014年第7期42-45,共4页Construction Technology

摘　　要：某工程采用钢筋混凝土钻孔灌注桩基础,在灌注桩施工中采用"旋挖+冲反"施工工艺,即在钻孔灌注桩施工中先使用旋挖钻机钻进成孔,待钻孔至硬质岩层地层时改用冲击反循环钻机钻至设计深度。详细介绍了该工艺的原理、特点、施工工艺流程及质量控制。Reinforced concrete bored pile is adopted in some project. During the pile construction, rotary drilling and percussion reverse circulation drilling were used, which means the rotary drilling rig is used to drill during the construction of bored pile, and after drilling to the hard rock strata, the percussion reverse circulation drill rig is used instead of rotary drilling rig to achieve the projected depth. This paper mainly introduced principle, characteristics, construction process and quality control measures of this technology.

关 键 词：桩基础 钻孔灌注桩 旋挖钻机 冲击反循环钻机 施工技术 质量控制 

分 类 号：TU753.3[建筑科学—建筑技术科学]