Study on the construction control of tied arch bridge without support construction concrete filled steel tube

The whole construction control process of tied arch bridge of arch first and beam late without support construction was explained detailedly starting from construction practice of a tied arch bridge of concrete filled steel tube,the whole hoisting of steel tube arch rib,lift-up construction of concrete filled steel tube,sectional and symmetric lifting of tied bar and the optimization of suspender force were discussed importantly,which can be used as a reference for similar projects.