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随着社会的发展和城市交通流量的增加,城市和公路隧道中不可避免地需考虑隧道分岔,而目前国内对该类隧道的设计还处于总结和经验积累阶段。针对“Y”形喇叭口分岔隧道,从隧道平面布置、分岔过渡形式、可行性论证及计算方法等几方面进行了设计方法的详细介绍,提出了由大跨隧道过渡至连拱隧道进而转换至小净距隧道的步骤、关键问题及相应的计算原则和方法,为分岔隧道的设计和施工提供了很好的理论价值和指导意义。
With the development of society and the increase of urban traffic flow, it is unavoidable to consider the tunnel bifurcation in urban and highway tunnels. At present, the design of such tunnels is still in the stage of summary and experience accumulation. Aiming at the “Y” -shaped trumpet bifurcation tunnel, the design method is introduced in detail from the aspects of tunnel layout, bifurcation transitional form, feasibility demonstration and calculation method, and the transition from long-span tunnel to arch The steps, key problems and corresponding calculation principles and methods for tunnels to be converted into small clear-distance tunnels provide good theoretical value and guiding significance for the design and construction of bifurcated tunnels.