高原山区公路桥梁桥型方案设计探讨

Discussion on Bridge Type Schemes of Highway Bridge in Plateau Mountainous Area

高原山区地形地质条件复杂,不良地质往往决定桥梁桥型选择及跨径布置。结合高原山区公路桥梁的特点及选型原则,以工程实例为背景,针对高原山区水库深水区复杂环境条件下的桥梁方案,从结构特点、施工工艺、环保、后期养护和工程造价等方面进行综合分析比较,推荐采用混合式叠合梁独塔斜拉桥方案,为高原山区公路桥梁选型提供参考。

The choice of bridge type schemes and span arrangement are often decided by bad geology because of the complicated topographic and geological conditions in plateau mountainous area.In this paper,according to the characteristics and scheme selection principles of highway bridges in plateau mountainous area,the bridge schemes are compared from the aspects of structure characteristics,construction technology,environmental protection,later maintenance and engineering cost,taking engineering examples as the background,in view of the complex condition of the deep-water area in reservoir of plateau mountain.The hybrid composite beam cable-stayed bridge with single pylon is recommended as a reference for highway bridge scheme selection in plateau mountainous area.