超高性能混凝土在嘉兴市快速路环线工程中的规模化应用

Large-Scale Application of Ultra-High Performance Concrete in Jiaxing Urban Expressway Loop Project

摘要:

嘉兴市快速路环线工程采用超高性能混凝土（UHPC）作为小箱梁和T梁的湿接缝，减少了现场焊接作业量；部分节点采用大跨径钢-UHPC连续组合梁方案，减轻了上部结构重量和基础规模，且钢-UHPC组合桥面结构可避免传统钢桥面的疲劳和开裂问题，有效加快现场施工速度，提高结构耐久性。UHPC在嘉兴市市区快速路环线工程中的规模化应用，将进一步推动预制拼装技术在城市桥梁工程中的应用和发展。

Abstract:

The ultra-high performance concrete (UHPC) is used for the wet joint of the small box beam and T beam in the Jiaxing Urban Expressway Loop Project, which reduces the workload of welding on site. The scheme of long-span steel - UHPC continuous composite beam is adopted for the partial nodes, which reduces the superstructure weight and foundation scale. The steel - UHPC composite bridge deck structure can avoid the fatigue and cracking problems of traditional steel bridge deck, which effectively accelerates the on-site construction speed and improves the structural durability. The large-scale application of UHPC in the Jiaxing Urban Expressway Loop Project will further promote the application and development of prefabrication and assembly technology in the urban bridge engineering.