水平冷冻与割盾尾相结合的盾构接收工艺

Shield Receiving Process Combining Horizontal Freezing and Shield Tail Cutting

为了确保全断面富水性粉砂地层盾构接收风险可控,在原有设计方案基础上,对接收工艺进行了优化,形成一种综合盾构接收工艺。通过采用“地面水泥土加固+洞门水平冷冻加固+短套筒+洞门钢丝刷+割盾尾+降水井辅助降水”的综合接收工艺进行盾构接收,避免了盾构机在接收出洞过程中发生洞门渗漏水、涌水涌砂等安全事故,确保了很好的冻结加固和洞门止水效果,使盾构接收的风险安全可控,为后续轨道交通工程提供了可以参考的经验。

To ensure that the risk of shield receiving in full section water rich silty sand stratum can be controlled,based on the original design scheme, the receiving process is optimized to form a comprehensive shield receiving process. By using the comprehensive receiving process of "cement soil reinforcement + horizontal freezing reinforcement + short sleeve box + tunnel door wire brush + shield tail cutting + auxiliary precipitation", the shield machine can avoid the safety accidents such as tunnel door leakage, water and sand gushing during the receiving and exit of the tunnel, which ensures good freezing reinforcement and water stop effect of the tunnel door and makes the risk of shield receiving safe and controllable. It provides reference experience for subsequent rail transit projects.