复杂条件下超深基坑三排桩支护逆作换撑施工技术  

Construction Technology of Three⁃row Pile Supporting for Super Deep Foundation Excavation Under Complicated Conditions

作　　者：张相平[1] 张满江红[1] 王云鑫 张潇丹 ZHANG Xiangping;ZHANG Manjianghong;WANG Yunxin;ZHANG Xiaodan(China Construction Second Engineering Co.,Ltd.South China Company,Shenzhen,Guangdong 518048,China)

机构地区：[1]中国建筑第二工程局有限公司华南分公司,广东深圳518048

出　　处：《施工技术（中英文）》2022年第1期72-76,共5页Construction Technology

摘　　要：星河雅宝高科创新园四A地块施工总承包工程共5层地下室,基坑开挖深度最大为33.8m,因基坑北侧存在敏感性建筑物,其下方不允许预应力锚索进入。北侧基坑支护采用三排桩+三角内支撑支护体系。三排桩区域外的地下室结构采用顺作法施工,三排桩区域内的地下室采用特殊逆作法施工,以实现三排桩区域内结构施工和拆换撑,为城市中心区地下支护工程锚索不出基坑的施工方法提供了一种解决方案。The general project of the 4⁃A Plot of Xinghe Yabao High⁃tech Innovation Park has 5⁃floor⁃basements altogether,and the maximum excavation depth of its foundation excavation is 33.8m.Due to the existence of sensitive buildings on the north of the foundation excavation,pre stressed anchor cables are not allowed to use below it.Thus,a three⁃row piles+triangular internal support system is applied.A normal process method is adopted in the construction of the basement outside the three⁃row pile area,and a special reverse process method is adopted in the basement inside it to realize the structural construction and disassembly and replacement of braces in it.Particularly complex as the whole process is,it does provide a solution for the construction scheme of anchor cables in foundation excavation in the underground support project in the central area of the city.

关 键 词：深基坑 逆作法 支护 三排桩 换撑结构 施工技术 

分 类 号：TU753[建筑科学—建筑技术科学]