密贴下穿既有线的暗挖地铁车站群顶顶托关键技术研究

Key Technology Research of Group Lift-up Underpinning for Subway Station with Subsurface Excavation and Closely Adjacent Down-traversing Existing Line

依托北京地铁10号线二期公主坟站密贴下穿既有地铁1号线公主坟站进行系统研究,完善整合既有的前评估、结构体系优化、工法研究、过程控制、监控量测、后评估研究成果,形成一套完整的新建平顶直墙大断面地铁车站密贴下穿既有车站的关键技术研究体系及结构设计施工指南,保证类似地下密贴穿越工程的安全、经济、高效有重要的工程意义和价值。

Based on the system study on the second phase project—Gongzhufen station of Beijing subway line 10 which adjoins down-traversing Gongzhufen station of subway line 1,before the perfect integration of the existing evaluation, structure optimization, research method, process control, monitoring,measurement,after the assessment results. This paper forms a complete set of new flat-top and straight wall of large section subway station closely down-traversing both station key technology research system and the structure design and construction guide,which ensures similar underground down-traversing engineering safety,economy and high efficiency.