峡口香溪河大桥方案设计

Scheme design of Xiakou Xiangxi River Bridge

本文简要介绍峡口香溪河大桥的项目概况、技术标准、地形地貌、河段特征及地质条件等方面内容,并根据大桥桥位U形河谷的建设条件、主桥的方案构思原则,排除连续刚构的可行性,拟定了独斜塔斜拉桥、小跨径地锚式悬索桥、中承式钢管混凝土拱桥3个方案。从通航、防洪、环保、地形地质、施工难度、工程经济性等多方面综合比较3个方案的优缺点,最终推荐采用体现地方文化特色的琵琶塔造型独斜塔斜拉桥,期望为类似的桥梁设计提供参考。

This paper briefly introduces the project overview,technical standards,landform,reach characteristics and geological conditions of xiakou Xiangxi River Bridge.According to the construction conditions of u-shaped river valley in the bridge location and the principle of the main bridge scheme,the feasibility of continuous rigid frame is eliminated,and three schemes are drawn up,namely,single inclined tower cable-stayed bridge,small span ground anchor suspension bridge and middle through concrete-filled steel tube arch bridge.The advantages and disadvantages of the three schemes are comprehensively compared from the aspects of navigation,flood control,environmental protection,topography and geology,construction difficulty and engineering economy.Finally,the pipa tower shaped single leaning tower cable-stayed bridge reflecting local cultural characteristics is recommended,hoping to provide reference for similar bridge design.