Construction Technology for Continuous Crossing of Rivers and National Highways in Urban Interchange Bridges
The first section of the Xingtang Street North Extension Project in Suzhou Industrial Park(from Suhong Road to Weicheng Road)involves multiple styles of interchange bridge box girder structures,small radius of some span curves,and high difficulty in structural construction,and the bridge continuously spans the navigable Loujiang River and the operating G312 National Highway,which poses high construction risks.Based on past practical experience and successful implementation cases,we applied the double row steel pipe pile sandwich soil cofferdam technology+foundation pit excavation and bottom sealing construction technology to solve the construction difficulties of underwater bridge foundations and designed a combination support system consisting of Bailey frame and bowl buckle,which had successfully completed the construction tasks of crossing existing ramps over water,as well as spanning national highways and existing bridge piers.
interchange bridgecontinuous spaningdouble row steel pipe pile sandwich soil cofferdamcombination support system
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