浅谈大窝山隧道进口段软弱围岩短台阶施工

On the short step construction technology of the soft surrounding rock in the Dawoshan mountain tunnel entrance

结合大窝山隧道进口工程实例,介绍了大断面隧道软弱围岩采用短台阶七步流水开挖法进行作业的施工技术,并提出了质量控制要点,总结了七步开挖法施工的优点,从而使施工质量和施工安全完全处于可控状态。

Combined with the example of Dawoshan mountain tunnel entrance project, the author introduces the construction technology of excavatingthe large section tunnel soft surrounding rock by using the short seven-step excavation method, puts forward the quality control points, summarizes the advantages of the seven-step excavation method, to make the construction quality and the construction safety controllable.