长江漫滩区深大基坑紧邻在建地铁结构关键技术  

Key Technologies for Deep Foundation Pits Adjacent to the Building Subway Structure in Yangtze River Flood Plain Area

作　　者：谭丽华 杨聪 TAN Li-hua;YANG Cong(Beijing Urban Engineering Design&Research Institute Co.,Ltd.,Nanjing 210006,China)

机构地区：[1]北京城建设计发展集团股份有限公司,南京210006

出　　处：《价值工程》2025年第6期121-123,共3页Value Engineering

摘　　要：以南京长江漫滩区临近在建地铁结构的某深大基坑为依托,结合工程地质条件、基坑工程与地铁工程时空关系等多方面因素,研究长江漫滩区复杂地层中深大基坑紧邻在建地铁结构的关键设计方案,并从支护结构、支撑体系、出土路径、地下水处理等方面对设计方案进行优化。提供基坑工程各施工步序下,对应的地铁建成结构的变形控制指标。采用有限元软件对地连墙成槽、基坑开挖等施工步序全过程分析计算,提取对应工况下地铁车站主体结构、出入口、盾构隧道变形数值,掌握基坑工程全工况条件下对地铁结构影响规律,为后续类似工程的研究及设计提供参考。Based on a deep foundation pit near the subway structure in the Yangtze River flood plain area of Nanjing,combined with various factors such as engineering geological conditions,time-space relationship between foundation pit and subway engineering construction,the key design scheme of the deep foundation pit adjacent to the building subway structure in the complex strata of the Yangtze River flood plain area is studied,and the design scheme is optimized from the aspects of support structure,support system,excavation path,groundwater treatment,etc.It provides deformation control indicators for the subway construction corresponding to each construction step of the foundation pit project.We use finite element software to analyze and calculate the entire process of construction such as trenching of the diaphragm wall and excavation of the foundation pit,extract deformation values of the main structure,entrances and exits,and shield tunnel of the subway station under corresponding working conditions,and grasp the influence law of the foundation pit engineering on the subway structure under all working conditions,providing reference for the research and design of similar projects in the future.

关 键 词：长江漫滩区 深大基坑 在建地铁 地下连续墙 有限元 变形 

分 类 号：TU753[建筑科学—建筑技术科学]