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某新建城际铁路与既有铁路交叉,采取盾构法新建隧道下穿通过,为确保盾构下穿过程中铁路行车的绝对安全,根据下穿处铁路工程地质情况,下穿前对铁路路基和桥涵底部采取注浆加固进行处理;为减少盾构推进过程中对土体扰动,合理选择盾构机类型及推进施工参数;科学制订监测方案,加强注浆加固和盾构推进过程中路桥和线路的监测,发现异常及时采取措施,确保行车安全。
A new inter-city railway crosses an existing railway and adopts a shield tunneling method to pass through the new tunnel. In order to ensure the absolute safety of the railway running through the tunnel under the shield, according to the geological conditions of the railway under the tunnel, And the bottom of the bridge and culvert to take grouting reinforcement for processing; in order to reduce the shield during the process of soil disturbance, a reasonable choice of shield machine type and promote the construction parameters; scientific development of monitoring programs to strengthen the grouting reinforcement and shield in the process of road and bridge Monitoring of the line, found abnormal and timely measures to ensure traffic safety.