Simply-Supported Continuous Bridge System Construction Optimization Research

Along with our country the rapid development of the highway construction, bridge constructionquantity increases substantially, bridge structure and construction technology are also constantlyenriched." First simply supported to continuous girder" due to its convenient construction andexcellent working performance in middle span (25~40m) has been widely used in the bridge.Based on the eastern coast of Shenzhen Liantang Expressway to saline paragraph Viaduct (n×30(35) of prestressed concrete simply-supported continuous box girder) as an engineering example,firstly, summarizes the simply supported-to-continuous beam of the general construction process,followed by the simply supported-to-continuous beam of model beam experiment simulation, andthrough on the model of beam for a variety of analysis of load test and analysis of static load test ofthe bridge, the stress effect. Finally, according to various test data and puts forward thecorresponding optimization: camber cannot simple reference beam inverted arch value, needaccording to its structural elements are calculated; prefabricated beam is arranged through thetensioning trough tensioning procedure time is shortened; the C55micro expansion concrete wet jointpouring pouring connection; after isolation Pier Casting, negative bending steel strand separationpiers stretching, temporary support pier removal principle of isolation. For the similar constructiontechnology provides more clear construction train of thought.