桥梁自调式检修平台的设计与施工

Design and Construction of Bridge Self-Adjusting Maintenance Platform

桥梁检修施工中,要求不中断或尽量缩短交通中断时间,以满足交通运输畅通的需要,并且要保证施工质量和工作效率,结合工程特点和要求,迫切需要设计出一种安全、适用、轻便、舒适的自调式检修平台。根据桥梁结构特点,采用型钢形成U形抱箍固定于盖梁,抱箍上连接挂架平台,同时抱箍两角形成钢丝绳连接点,连接钢丝绳,继而逐榀拼接并挂设挂架平台,平台采用型钢焊接与自平衡系统连接成一榀,施工人员利用自锁式安全笼爬梯搭设和到达检修平台。运用MIDAS建模进行受力计算。结果显示:自调式检修平台的强度、刚度、抗风等均符合规范要求,同时实现了梁底全面施工不受桥下环境限制、不影响通航、不中断交通、不占用车道、不造成结构锚固破坏,以及灵活、轻便、可循环重复使用等优点。本设计可以为高速公路或地方道路桥梁检修施工提供理论基础及技术支撑。

In bridge detection and maintenance construction, it is urgent to design a safe, applicable, portable and comfortable self-adjusting maintenance platform to meet the needs of uninterrupted or minimize the traffic interruption time and ensure the construction quality and work efficiency.According to the characteristics of the bridge structure, the U-shaped hoop is formed by the steel to be fixed on the capping beam, and the hoop is connected to the hanger platform. At the same time, the two corners of the hoop form a wire rope connection point, and the wire rope is connected, and then the pylon platform gradually formed splicing. The steel welding and self-balancing system are connected, and the workers use the self-locking safety cage ladder to set up and reach the detection and maintenance platform.The MIDAS finite element software is used to model and calculate it. The results show that the strength, rigidity and wind resistance of the platform meet the requirements, at the same time, the full construction of the beam bottom is not restricted by the environment under the bridge, does not affect navigation, does not interrupt traffic, does not occupy lanes, does not cause structural anchorage damage. And the self-adjusting maintenance platform has the advantages of flexibility,portability, recyclability and reuse. It can provide a theoretical basis and technical support for the detection and maintenance construction of other expressways or local roads and bridges.