铁路大直径隧道下穿地铁车站风险控制

Risk Control of Large-diameter Railway Tunnels Undercrossing Metro Stations

随着铁路建设和城市地下空间开发的快速发展,新建隧道密贴地下结构的工程越来越普遍,不可避免出现大量环境复杂、施工风险大、控制标准极严格的建设项目,如果处理不当,可能影响轨道交通的安全、正常运营。以新建京张铁路清华园隧道为例,结合下穿地铁车站既有结构形式复杂、垂直距离小、地层情况复杂等特点,介绍铁路大直径隧道采用盾构法下穿城市地铁车站的技术控制措施,并从项目风险管理的角度进行分析。在实际风险控制中,以良好效果确保了工程安全,并通过对各项控制因素的预判和实践,验证了控制效果,可为类似大直径盾构隧道下穿地铁建筑项目的施工风险管理提供借鉴。

With the rapid development of railway construction and urban underground space development, new tunnels close to underground structures are becoming more and more common. It is inevitable that there are a large number of construction projects facing problems such as complex environment and high construction risk and with strict control standards. If not handled properly, these problems may affect the safe and normal operation of rail transit. Taking the new Qinghuayuan Tunnel of Beijing-Zhangjiakou Railway as an example,combined with the characteristics of complicated structural form, small vertical distance and complex stratum of existing undercrossing metro stations, this paper introduces the technical control measures of the railway largediameter tunnel undercrossing the urban metro station by shield method, and gives the analysis from the perspective of project risk management. In the actual risk control, the engineering safety is ensured effectively,and the control effect is verified through the pre-judgment and practice of various control factors, which can provide reference for the construction risk management of similar large-diameter shield tunnel passing through metro construction projects.