基于地层结构法的傍山路段棚洞结构设计

受线形、地形地貌等因素的影响，山区公路的傍山路段不可避免地要形成高边坡或偏压隧道，为减小地质灾害，最大限度地保护自然生态环境，棚洞结构是一个很好的选择。与普通明洞结构不同，棚洞结构受力比较复杂，不仅承受回填偏压荷载，还要不同程度地受人工边坡的影响。为深入研究边坡对棚洞结构的影响，提出了采用基于地层结构法的傍山路段棚洞结构设计，应用有限元软件动态模拟了棚洞施工的全过程，重点分析了不同应力释放率（0～50%）的荷载作用于棚洞时的结构内力及变形特征。

Design of Shed-tunnel Adjacent to Mountain According to Stratum Structure Method

As a result of the special route,geographic and geomorphic conditions,high slope or unsymmetrical loading tunnel inevitably appears on the highway adjacent to mountains.In order to minimize the geological hazards and maximize the natural environment protection,shed tunnel was chosen.Compared to common open-cut tunnel,the stress distribution of shed tunnel is very complex,which include the asymmetrically-load from backfill and different stress effects from artificial slope.For the purpose of study the effect...