施工技术 2010年11月 64 CONSTRUCTION TECHNOLOGY 第39卷第11期 江苏LNG项目旋挖后注浆挤扩灌注桩施工技术 王国辉，祁建永，张彦鹏 (河北建设察研究院有限公司，河北石家庄050031) [摘要]江苏LG项目储罐基础采用旋挖钻孔后注浆挤扩灌注桩.针对工程施工难点，介绍了聚合物泥浆旋挖钻 孔、三岔双向挤扩施工、桩端后注浆施工的工艺流程、施工方法和质量控制要点.通过本工程的应用效果，说明了 三岔双向挤扩技术和桩端后注浆技术对桩基承载力的影响，以及聚合物泥浆旋挖钻孔技术的快速、环保特性.结 果表明，这3项技术联合应用可有效缩短施工工期、显著提高桩基承载力，降低工程造价. [关键词]钻孔灌注桩；旋挖钻孔；聚合物泥浆；后注浆；挤扩桩 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2010)11-0064-04 Construction Technology of Post-grouting and Extrude-expanding Bored Piles with Rotary Drilling in Jiangsu LNG Project Wang Guohui Qi Jianyong Zhang Yanpeng Hebei Research Institute of Construction and Geotechnical Inrestigation Co.Ltd.Shijiazhuang Hebei 050031 China) Abstract:Post-grouting and extrude-expanding bored pile with rotary drilling technocogy is adopted in tank foundation of Jiangsu LNG projeet.Based on difficulties in construction technical process main quality control points and construction method of rotary drilling with polymer slurry construction of expanded branches and bells by 3-way extruding arms and tip post-grouting are introduced.By the application of the technology influence of expanded branches and bells by 3-way extruding arms and tip post-grouting technology on the pile bearing capacity is described as well as the fast and environmentally friendly features of rotary drilling technology with polymer slurry.The results confirm that bined application of these three techniques ean effeetively short construction duration and significantly improve the bearing capacity o...
江苏LNG项目旋挖后注浆挤扩灌注桩施工技术.pdf
