This article talks about the common phenomenon of the cracks appearingin prestressed concrete beams, analyses the formation of these cracks and also pointsout the ways of indemnifying disposal and precautionary measures.

Article union situations and highway\'s actual terrain,geology,in view of the assembly type box beam bridge the substructure uses view picture pre-stressed Gai Liang П the bridge pier,and has carried on a more detailed introduction to this bridge pier\'s design and the application situation.

On pre-bending prestressed reinforced concrete girder;