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详细阐述了湿陷性黄土地段隧道双侧壁上下导坑开挖施工时的材料及机具要求,通过在山平高速公路二道梁隧道湿陷性黄土地段V级浅埋围岩开挖中成功实践应用,指出了施工质量和安全控制要点,并综合分析应用本施工方法所产生的经济和社会效益。施工中保证了隧道顶面国道109及明长城的安全,证明了本施工方法的实用性、可靠性与经济性。
This paper elaborates the material and equipment requirements for the excavation and excavation of the upper and lower double-sided tunnels in collapsible loess tunnel. Through the successful practice in the excavation of Grade V shallow surrounding rock in the collapsible loess section of Erdaoliang tunnel of the Shanping Expressway Application, points out the construction quality and safety control points, and comprehensive analysis of the economic and social benefits generated by the application of this construction method. The construction ensured the safety of the top national highway 109 and the Great Wall of the tunnel and proved the practicability, reliability and economy of the construction method.