CFG桩复合地基施工技术  

Construction Technique for Composition Foundation with CFG Piles

作　　者：闫明礼[1] 蔡晓鸿[2] 关伟兰 佟建兴[1] 

机构地区：[1]中国建筑科学研究院地基所,北京100013 [2]北京建工集团总承包二部,北京100045 [3]北京五豪世纪建筑设计有限公司,北京100036

出　　处：《工程勘察》2007年第2期35-37,71,共4页Geotechnical Investigation & Surveying

摘　　要：本文给出了不同CFG桩施工工艺的适用地层条件;重点介绍了振动沉管CFG桩和长螺旋钻孔、管内泵压混合料灌注成桩的施工技术要点;对清土、剔桩头过程中如何防止断桩和扰动桩间土等问题进行了讨论;对于长螺旋钻孔、管内泵压混合料灌注成桩施工工艺中桩端虚土和窜孔问题,从产生机理上进行了分析,并给出了切实可行的解决办法。The appropriate stratum conditions for the construction of various CFG piles are presented. The technical points of vibrating sunk-tube CFG piles and the pumping concrete piles with the twist drilling are emphatically recommended. The problems such as how to avoid breaking piles and disturbing the foundation soil during the excavation and the breaking butt are discussed. The issues on how to avoid producing weak soil under the end of piles and how to avoid concrete flowing between riles are recommended.

关 键 词：CFG桩复合地基 施工技术 长螺旋钻机 

分 类 号：TU472[建筑科学—结构工程]