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阐述了秦岭终南山特长公路隧道东线北口堆积体段超前大管棚的施工 ,通过监控量测结果进行分析 ,总结了超前预支护技术在通过软弱围岩时的作用
This paper expounds the construction of advanced large pipe shed in the north section of the east exit of the east lane of Qinling Zhongnanshan expressway tunnel. Through the analysis of the monitoring measurement results, the effect of advanced advance propping technology on the weak surrounding rock is summarized