Combined with the construction of Jieyang separated overpass bridge,it analyzes the keys in the construction of full space steel support,so as to improve the supporting frame construction technique of continuous box girder and guarantee the construction of bridge projects.

Combined with the features of arch bridge,it makes a research of bridge supporting frame setting plan,discusses the force on arch section,vertical force calculation of each arch section to the supporting frame,the thrust face calculation at supporting pier and supporting frame calculation,and gets the rational horizontal and vertical supporting wood size.