大断面隧道采用“盖挖+托换”法零距离下穿运营地铁车站研究  

Research on Zero-Distance Underpass Operation Metro Station in Large Section Tunnel by"Cover Excavation+Support Replacement"Method

作　　者：李俊[1] 宋沐春 LIJun;SONG Mu-chun(China Railway Eryuan Engineering Group Co.Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《工程建设与设计》2023年第6期104-107,共4页Construction & Design for Engineering

摘　　要：目前,国内新建隧道下穿既有车站还是基于传统矿山法理念设计,该设计理念主要是为了抵抗来自拱顶及周边的围岩荷载,但零距离下穿车站已没有拱顶土荷载问题,边界条件已与传统矿山法发生了很大变化。虽然传统矿山法在实践过程中存在成功案例,但仍具有工期长、造价高、受力转换不清晰等弊病。论文针对传统矿山法存在的弊病提出了新的设计与施工方法,如支护及托换处理措施,进行了数值计算分析及现场监测结果分析,并在实践中成功应用。At present,the design of new tunnel underpass existing stations in China is stil based on the concept of traditional mining method,which is mainly designed to resist the load from the vault and surrounding rock.However,there is no arch soil load problem for zero distance underpass stations,and the boundary conditions have changed greatly with the traditional mining method.Although there are successful cases in the actual practice of traditional mining method,there are still many disadvantages such as long construction period,high cost,unclear force conversion,etc.In view of the defects existing in the traditional mining method,the paper puts forward new design and construction methods,such as support and replacement treatment measures,carries on the numerical calculation analysis and field monitoring results analysis,and is successfullyappliedinpractice.

关 键 词：大断面隧道 地铁车站 盖挖 托换 零距离 下穿 

分 类 号：U455[建筑科学—桥梁与隧道工程]