Abstract:At present, most of the urban bridges are not built very long, and the technical status of the bridges is good. But there are the conflicts with the urban renewal planning or the using situations not to meet the current conditions. Compared with the demolition and reconstruction, the jacking and translation reconstruction technology not only does not produce the construction waste, but also can improve the utilization rate of resources, save the construction costs, has little influence on the surrounding traffic and environment, and has the better social effect and economic effect. Relying on the translation jacking reconstruction project of Yinxian Avenue Overpass Bridge in IV Section (Dongqian Lake Section) Expressway Project in Ningbo Yinzhou Avenue - Fuqing Road Expressway Phase I Project, the new friction interface technology of bridge translation is specially studied. In the translational jacking reconstruction process of Yinxian Avenue Overpass Bridge, the weight of the single-width main bridge is 4 533.2 tons in the bridge reconstruction. Only 24.8-t jacking thrust is used to translate the bridge by 2 meters to the design position. The friction coefficient is reduced to 0.005 4 by using the new friction interface, which proves the reliability of the new friction interface in bridge translation construction, and has many advantages of reusing the existing bridges, avoiding the demolition and reconstruction, and reducing the carbon emission.
