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结合樊家山隧道斜井与主洞交叉口段的施工实例,介绍了Ⅳ级围岩公路隧道斜井与主洞交叉口处通过导洞进入到主洞,再对导洞进行扩挖形成主洞的施工方法和技术。
Combined with the construction example of the intersection of Fanjiashan tunnel inclined shaft and main tunnel, the introduction of the grade IV surrounding rock road tunnel at the intersection of the inclined shaft and the main tunnel leads to the main tunnel through the pilot tunnel, and then enlarges the pilot tunnel to form the main tunnel Construction methods and techniques.