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随着国民经济的发展、公路交通量的增长、车辆的车型及载重的变化,某些高速公路在运行中先后经过了大修改造。由于高速公路改造、大修以及跨线桥施工等方面的原因,使得部分高速公路跨线桥净空高度不能满足现行规范要求,需进行整体抬升。对于桥梁整体抬升施工,大部分设计采用液压整体同步顶升施工技术,而采用吊装法进行桥梁整体抬升施工是一种简单快捷的施工方法,避免了液压同步顶升技术需搭设支架、中断交通等问题,减少了施工难度,缩短了施工工期。
With the development of national economy, the increase of road traffic volume, the changes of vehicle models and load, some expressways have undergone major overhaul in their operation. Due to the reasons of highway reconstruction, overhaul and overpass construction, the clearance height of some expressway flyover can not meet the current codes and needs to be upgraded. For the overall construction of the bridge, most of the design adopts the hydraulic overall synchronous jacking construction technology, while the hoisting method for the whole bridge lifting construction is a simple and quick construction method, avoiding the hydraulic synchronized jacking technology to be erected a bracket, interrupt traffic and so on Problems, reducing the construction difficulty and shorten the construction period.