门式抗浮框架对隧道变形控制效果实测分析  

Measurement Analysis of Control Effect of Anti⁃uplift Portal Frame on Tunnel Deformation

作　　者：陈福斌[1] 祁恒远 蓝淦洲 许啸鹏 CHEN Fubin;QI Hengyuan;LAN Ganzhou;XU Xiaopeng(Shenzhen Transportation Public Facilities Construction Center,Shenzhen,Guangdong518040,China;College of Civil Engineering,Hunan University,Changsha,Hunan410082,China)

机构地区：[1]深圳市交通公用设施建设中心,广东深圳518040 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《施工技术（中英文）》2022年第13期96-101,共6页Construction Technology

基　　金：深圳市建设工程科研课题:桂庙路一期工程明挖隧道(与地铁共线段)施工对地铁盾构区间的影响分析及其控制技术研究(20151118003B)。

摘　　要：依托深圳某城市快速化改造工程,介绍了一种隧道上浮控制措施——门式抗浮框架技术。基于现场实测,获得了门式抗浮框架施工阶段和主体工程施工阶段隧道的变形响应规律,监测结果表明:竖井开挖主要引起隧道顶部产生竖向位移,隔三挖一是最合适的竖井跳挖间隔;随着竖井及基坑的开挖,隧道断面由“横鸭蛋”向“竖鸭蛋”的变形模式发展;在基坑开挖阶段,隧道部分断面的上浮值在基坑开挖到底前便已趋于稳定,明确了门式抗浮框架的有效性。Base on a rapid urban reconstruction project in Shenzhen,this paper introduces the technology of anti⁃uplift portal frame.Based on the field measurements,the deformation response laws of the tunnel in the construction stage of anti⁃uplift portal frame and the main construction stage are obtained.The monitoring results show that the vertical displacement of the tunnel crown is mainly induced by the shaft excavation,and three shafts is the most appropriate interval during shaft excavation.With the excavation of shaft and foundation excavation,the deformation mode of tunnel cross section develops from horizontal ellipse to vertical ellipse.In the stage of excavation,the uplift value of some sections of the tunnel tends to be stable before the foundation excavation is excavated to the bottom,which verifies the effectiveness of the anti⁃uplift portal frame.

关 键 词：地下工程 隧道 基坑 门式抗浮框架 变形 控制效果 

分 类 号：TU47[建筑科学—结构工程]