拱北明挖隧道超大基坑地基加固方案研究  

Research on the Reinforcement Scheme of Foundations for Super Large Foundation Pits in Open-cut Tunnels of Gongbei

作　　者：陈飞飞[1] 李波[1] CHEN Feifei;LI Bo(CCCC Second Highway Consultant Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《路基工程》2023年第1期201-206,共6页Subgrade Engineering

基　　金：广东省交通运输厅重大工程项目(科技201601001)。

摘　　要：以港珠澳大桥珠海连接线工程拱北隧道明挖段为例,选取ZK1+350~+540标段建立数值分析模型,讨论基坑满堂加固、隔水层裙边+抽条加固与仅裙边加固法三种方案对明挖隧道地基沉降、地下连续墙变形及围护结构受力特性的影响规律,提出推荐方案。Taking the open-cut section of the Gongbei tunnel of a Zhuhai connecting line project of the Hong Kong—Zhuhai—Macao Bridge as an example,the ZK1+350~+540 section was selected to establish numerical analysis model and the effects of three schemes were discussed,such as full-thickening of foundation pits,skirt of water-resisting layer+strip reinforcement and skirt reinforcement method only,on foundation settlement of opencut tunnel,deformation of diaphragm walls,and force characteristics of enclosure structures.The recommended schemes were proposed.

关 键 词：软弱地层 地基加固 地基沉降 地连墙变形 支撑内力 

分 类 号：U231.4[交通运输工程—道路与铁道工程]