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目前国内对隧道洞口段的设计大多考虑了预加固措施,这里详细阐述了洞口段围岩预加固的措施以及隧道洞口段施工开挖的方法,指出坚持施工原则,采取有效的施工方法,对确保隧道施工和运营安全至关重要。
At present, most of the design of tunnel openings in China considers the pre-reinforcement measures. The measures to pre-reinforce the surrounding rock in the tunnel openings and the methods of excavation at tunnel openings are described in detail here. It is pointed out that insisting on the construction principles and adopting effective construction methods, Tunnel construction and operational safety are of the essence.