This paper introduces the cast in place cantilever construction technology used in uncontinous box beam of the Hanchuan Hanjiang River Bridge.

The piers of the Bridge are of single-and double-column piers without capping beams and the concrete continuous box girders atop the piers are constructed by movable shuttering form.

The invention provides a method for repairing large-span post-tensioning cast-in-situ box girder cracks, relating to road engineering, in particular to the bridge construction technical field.