Abstract:Based on the structure of pre-stressed concrete continuous big-box beam bridge in a practical engineering project, and according to related technical standards and engineering conditions, the structural construction, longitudinal design and local analytical essentials of big-box beam are introduced. The design of pre-stressed concrete continuous big-box beam bridge is studied. The size of box beam, layout of steel cable and longitudinal calculation are summarized. The design and calculation details for the crossbeam and deck slab are proposed. The stability of lateral overturning is considered in the design period to guarantee the safety and applicability of bridge structure, which can be referred for the similar projects.