复杂地形地质条件下高等级公路总体设计

随着西部大开发的不断深入，山区高等级公路建设步伐明显加快。由于山区高等级公路地形地质条件复杂，构造物比例高，故勘察设计难度大，施工技术要求高，且需要对重点难点路段或工点采取针对性措施。以城口至万源快速公路通道为例，阐述高等级公路总体设计的重要性。

Overall Design of High-grade Highways under Complicated Topographic and Geological Conditions

With continuous deep development of the west regions, the construction pace of high-grade highways in mountainous areas speeds up obviously. For complicated topographic and geological conditions for high-grade highways in mountainous areas and high proportion of structures, survey and design face large difficulty and construction technology is highly required, and the targeted measures should be taken for key and difficult sections or construction sites. With Chengkou-Wanyuan Expressway passageway as an example, this paper expatiates importance of overall design of high-grade highways.