大跨径连续钢箱梁钢桥面铺装设计研究

Design of steel deck pavement of long-span continuous steel box girder bridge

摘要:

采用三阶段力学分析方法对崇启大桥大跨径连续钢箱梁钢桥面铺装受力特点进行分析，结合崇启大桥的使用环境和国内钢桥面主要铺装类型的调研，推荐双层环氧沥青铺装作为崇启大桥的钢桥面铺装方案。结合崇启大桥大跨径连续钢箱梁桥面铺装的受力特点，开展了崇启大桥钢桥面铺装关键材料及性能研究、防水粘结层性能研究以及钢桥面铺装组合结构疲劳性能研究，同时从崇启大桥桥面铺装疲劳耐久性角度对富沥青环氧沥青混凝土进行了研究，研究结果表明铺装下层采用富沥青环氧沥青混凝土能够更好的满足崇启大桥钢桥面铺装的性能要求。

Abstract:

The mechanical properties of the steel deck pavement on Chongqi Bridge were carried out using a three stage mechanical analysis method. Based on the results of the mechanical analysis and the research conclusion of the main steel deck pavement cases, dual layer epoxy concrete steel deck pavement was designed. The pavement performance such as moisture resistance property, high and low temperature property, salt spray resistance property, mechanical property and fatigue property of epoxy asphalt concrete had been researched. The results show that the rich-asphalt epoxy asphalt mixture can satisfy the requirements of Chongqi Bridge deck pavement better than common epoxy asphalt mixture.