地铁盾构正交下穿隧道施工风险控制措施

Risk Control Technology for Construction of Metro Shield Tunnel Perpendicularly Crossing Underneath Existing Tunnel

为减小新建地铁盾构隧道下穿施工对既有运营市政隧道的影响,采取土体加固、加强底板配筋等前期预留措施,并在下穿过程中通过分析监测数据变化规律,进一步提出适时调整盾构掘进参数、注浆参数、进行土体改良等措施,达到保障既有运营隧道安全、确保地铁隧道施工安全和质量的目的。

In order to minimize the influence of metro shield tunnel perpendicularly crossing underneath existing tunnel on running municipal tunnel,a series of technologies,i. e. ground consolidation,floor reinforcement strengthening,monitoring data analysis,shield boring parameters and grouting parameters adjustment and ground conditioning,are adopted. The safety of the municipal tunnel and the metro shield tunnel and the construction quality of the metro shield tunnel have been guaranteed.