城市桥梁预制拼装快速化施工关键技术

Key Technology of Rapid Prefabrication Assembly Construction of Urban Bridge

为解决城市桥梁常规支架法施工工期长、文明施工差、安全风险高、占路时间长、对周边交通环境影响大等难题,以莫干山路提升改造(石祥路—绕城北线104国道收费站)工程预制拼装桥梁施工为实例,采用构件标准化预制、多轮18轴液压均衡平板车运输、机械化集中吊装、精细化快速施工、预制立柱快速精确安装、双立柱一体化盖梁精确定位、超长超重盖梁快速安装、长大多节段盖梁预制及干接精确安装、套筒灌浆质量保证等方法,解决了城市繁忙道路桥梁施工难题,具有较强的实际意义,可为类似城市桥梁施工提供借鉴。

In order to solve the problems of long construction period, poor civilization construction, high safety risk, long road occupation time and great influence on surrounding traffic environment in the conventional erection method of urban bridge, taking the construction of prefabricated assembled bridges in Moganshan Road Upgrading Reconstruction(Shixiang Road-Ring City North Line 104 National Highway Toll Station) Project as an example, the methods of standardized prefabrication of components,transportation of multi-wheel 18-axis hydraulic balanced platform lorry, mechanized centralized hoisting,precise and rapid construction, rapid and accurate installation of prefabricated stand columns, precise location of double-column integrated bent caps, rapid installation of super-long and overweight bent caps,prefabrication of long multi-segment bent caps and precise installation of dry joint, and quality assurance of sleeve grouting are used to solve the problem of bridge construction on busy roads in cities, which has the strong practical significance and can provide the reference for the construction of similar urban bridges.