基坑开挖及建筑加载对紧邻地铁的影响分析

Influence of Foundation Pit Excavation and Building Loading on Nearby Subway Tunnel

以北京通州运河核心区某项目为例,系统地分析了深大基坑工程开挖、复杂地下水环境、超高层建筑加载对紧邻地铁的影响,总结并提出了紧邻地铁建设项目具体加固措施及施工建议。采用数值计算+SFIA联合技术,对建筑物上部结构加载引起的地铁变形进行分析,并与地铁长期沉降数据进行对比。工程实践及监测结果表明,加固措施及施工建议能够有效控制项目建设对紧邻地铁隧道的影响,数值计算+SFIA联合分析技术能够精准、有效预测地铁沉降变形,可为类似项目建设提供借鉴与参考。

Taking the project in the Tongzhou Canal Core area of Beijing as an example,the major impacts of deep and large foundation pit excavation,complex groundwater environment and super-high-rise building loading on the adjacent subway were analyzed,and concrete reinforcement measures and construction suggestions for the adjacent subway construction project were provided.The combined technique of numerical calculation and SFIA was used to analyze the subway deformation caused by upper structure loading,and compared with long-term settlement data.The engineering practice and monitoring results show that the reinforcement measures and construction suggestions can effectively control the influence of the project construction on the adjacent subway tunnel,the combined analysis technique of numerical calculation and SFIA can accurately and effectively predict the ground settlement and deformation,which could provide reference for similar projects.