超宽渐变钢桥面UHPC铺装层施工技术

Construction Technology of UHPC Pavement Layer for Ultra-wide Gradient Steel Bridge Deck

摘要:

为保证航站楼落客平台钢箱梁超高性能混凝土（UHPC）铺装层整体施工质量，通过现场钢箱梁施工现状，制定适用于超宽渐变钢桥面UHPC铺装层的施工技术。传统超宽渐变桥面铺装施工，一般采用分块、分区域单独施工，以人工为主导，劳动力投入大，施工效率较低，且铺装层质量控制难度大。此次施工采用以机械化主导的施工工艺，通过超声波UHPC整平机、UHPC自动覆膜机进行UHPC桥面铺装，从而实现整幅超宽渐变钢桥面铺装一次性施工完成，既缩短了施工工期，降低了施工人员投入，又提高了整体施工质量。

Abstract:

To ensure the overall construction quality of ultra-high performance concrete (UHPC) pavement layer for the steel box girder of the terminal drop off platform, a construction technology suitable for the ultra-wide gradient steel bridge deck UHPC pavement layer is developed according to the current construction status of the steel box girder on site. The traditional construction of ultra-wide gradient bridge deck pavement generally adopts the separate construction in blocks and areas, which is dominated by manual labor with a large input of labor, low construction efficiency and great difficulty in quality control of the pavement layer. In this project, a construction technique dominated by mechanization is adopted. The UHPC bridge deck pavement is conducted by the ultrasonic UHPC leveling machines and UHPC automatic laminating machines so as to complete the entire ultra-wide gradient steel bridge deck pavement in one go, which not only shortens the construction period and reduces the input of construction personnel, but also improves the overall construction quality.