浅埋暗挖地铁隧道单渡线变断面施工关键技术研究

Research on the Key Technology of Single Crossing Section Construction in Shallow Buried Underground Subway Tunnel

针对地铁变断面暗挖隧道施工风险高的特点,本文以洛阳地铁2号线单渡线区间隧道为例,结合工程地质情况及设计参数,采用双侧壁导坑及交叉中隔墙法工法,同时辅以超前管棚及超前小导管注浆加固措施,有效控制了该工程风险,为类似变断面隧道施工提供参考。

In view of the high construction risk of subway tunnel with variable cross-section,this paper took the single crossover section tunnel of Luoyang Metro Line 2 as an example,combined with the engineering geological conditions and design parameters,adopted the double side heading and cross diaphragm(CRD)construction method,supplemented by super front pipe shed and advance small pipe grouting reinforcement measures,which effectively controlled the project risk,It provided reference for similar variable cross-section tunnel construction.