The Yellow River bridge (bridgeⅠ) located in BaoMao highway,total length is 810m,approach adopts a hole 20m prestressed concrete simply supported box girder.2-13 across can be divided into three parts, each part 4 spans 65m height of continuous box girder.BaoMao highway Yellow River bridge (bridgeⅡ) bridge span 831m,the bridge cross combinations (50 + 9 x 80 + 50) + 2 x 5.5 = 831m.The upper structure is variable cross-section prestressed concrete continuous box girder.

Through long-term health monitoring,judge whether the response of the bridge structure is normal.Finally combining artificial auxiliary examination (as shown in the figure), through the analysis of the structural characteristics, to assess the health status of bridge.Provides reference for maintenance, repair, and management decisions.