In order to provide a criteria for the stage division, the author gives a definition of exploration stage, division principles and its quantitive indications.
为了使划分阶段具有准则依据，作者提出了地勘阶段的定义、划分原则和区分阶段的定量标志。
Considering the present situation of shield tunneling on Beijing metro, the paper describes the construction stage division and the main points of engineering quality control for shield tunneling.
结合北京市地铁隧道盾构法施工的现状，对施工阶段的划分及各阶段的质量管理与控制要点进行阐述。
Considering the present situation of shield tunneling on Beijing metro, the paper describes the construction stage division and the main points of engineering quality control for shield tunneling.
结合北京市地铁隧道盾构法施工的现状，对施工阶段的划分及各阶段的质量管理与控制要点进行阐述。
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