Study on Cantilever Construction Technology in Long Span Prestressed Concrete Rigid Continuous Compound System Bridge

The full-length of Dongming Yellow River Highway Bridge is 4142.14m.In the meanwhile,the main bridge is a long span prestressed concrete rigid continuous compound system bridge.One long unit of the bridge is 990m and the span of the box beam is 120m.It has particular features such as large scale,complex construction and difficulty.In order to construct the bridge,cantilever construction technology and the main skill craft of the long span prestressed concrete rigid continuous compound system bridge have been given.Following the construction technology,no compulsive folding in 120m of the bridge,altitude error of the folding only 3mm and axial line error only 5mm have been realized.And the cantilever construction cyclic of the box beam is only 6 days.High speed,high precision and safe construction have been achieved.In a word,the cantilever construction technology of the box beam can offer the related data to such bridge's construction.