在沿河傍山地段进行公路修建时,设置棚洞结构,能够兼顾环境和经济效益。同时充分利用棚洞洞顶空间及分离式路基的灵活性,设置双层行车棚洞结构,以实现减少山体开挖、保持山体稳定并达到环境保护的目的。该文提出了6种双层行车棚洞结构,通过比选论证,选用3种双层行车棚洞结构进行了有限元数值模拟。根据研究分析结论,提出了结构设计和选型建议。 When paving the roads along the river and hillsides, the structure of the shed can be set up to balance the environmental and economic benefits. At the same time, taking full advantage of the flexibility of the roof space and the separated subgrade, the structure of double-story carriage shed is set up to reduce the mountain excavation, keep the mountain stable and achieve environmental protection. In this paper, six kinds of double-deck carriage sheds are proposed. Through the comparison and selection of three kinds of double-deck shed sheds, finite element numerical simulation is carried out. According to the conclusions of the research and analysis, proposed structural design and selection recommendations.