【摘要】 文章通过相似模型试验 ,对Ⅱ、Ⅲ、Ⅳ级围岩条件下采用三导洞法、中导洞半断面法和中导洞全断面法修建 4车道双连拱公路隧道进行了研究。通过对试验结果的研究分析 ,提出了在不同级别围岩条件下 4车道双连拱公路隧道安全、经济、合理的施工方法 ,可为连拱隧道的设计和施工提供参考更多还原

【Abstract】 Based on the model tests with analogous materials, this paper studies the construction methods of a 4-lane double-arch road tunnel: tri-pilot excavation option, central pilot half-section excavation option and central pilot full-face excavation option in surrounding rocks of grade Ⅱ, Ⅲ and IV respectively. As a result, it puts forward the reliable, economical and reasonable construction methods for a 4-lane double-arch road tunnel in different surrounding rocks, which can be taken as guidance to the design and construction of similar projects.更多还原