盾构隧道负环管片拆除时机分析

On analysis of negative loop pipe's demolishing time of shield tunnels

采用理论的方法建立了管片与土体之间的摩擦力计算模型,尝试利用该计算模型确定负环管片拆除的时机,并通过南京市纬三路过江隧道工程实例进行了计算,验证了该模型确定负环管片拆除时机的适用性。

The paper adopts the theoretic method to establish the friction calculation model between pipes and soil body,tries to use the calcula-tion model to identify the time for demolishing the negative loop pipe,calculates the crossing-river tunnel project at Weisanlu Road in Nanjing City,and proves the model is feasible to ensure the pipe demolishing time.