临海城市快速路桥梁工程预制拼装技术应用

Application of Prefabricated Assembly Technology in Linhai Urban Expressway Bridge Project

摘要:

在城市快速路系统快速发展的背景下，传统现浇桥梁施工模式已难以满足现代城市建设对节能环保、交通影响和施工效率的高要求。预制拼装技术通过工厂化生产、标准化设计和机械化安装，为实现桥梁绿色建造提供了有效路径。基于临海市城市快速路（南区段）工程实践，系统阐述了全预制拼装桥梁在结构设计、构件预制与现场快速施工环节的关键技术体系，包括BIM辅助的钢筋优化布置、新型结构简支桥面板连续体系、新型叠合板组合梁及改进的灌浆套筒连接工艺；叙述了立柱、盖梁等关键构件的工厂化预制与现场快速安装工艺；并针对工程应用中暴露的预制与现场阶段典型问题，总结了优化对策。通过标准化设计化、工厂化生产与智能化管理，有效保障了构件质量与施工效率，为类似城市快速路桥梁建设提供了有益参考。

Abstract:

With the rapid development of urban expressway systems, the traditional cast-in-place bridge construction modes has become difficult to meet the high requirements of modern urban construction for energy conservation and environmental protection, traffic impact and construction efficiency. The prefabricated assembly technology provides an effective solution for realizing the green construction of bridges through factory production, standardized design and mechanized installation. Based on the practice of the Linhai City Urban Expressway (Southern Section) Project, the key technical system of full-prefabricated bridge in structural design, component prefabrication and rapid on-site construction is systematically set forth, including BIM-assisted steel bar optimization layout, a new type of structural simple-supported bridge deck continuous system, a new type of superimposed slab composite beam and an improved grouting sleeve connection process. The factory prefabrication and rapid on-site installation technology of key components such as columns and bent caps are described, and the optimization measures are summarized for typical problems exposed in the prefabrication and on-site stages in engineering applications. Through standardized design, industrialized production and intelligent management, the quality and construction efficiency of the components are effectively ensured, providing the valuable reference for the construction of similar urban expressway bridge projects.