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Analysis on the Bearing Capacity of Old Highway Bridge in Heavy Hilly Areas

There is heavy traffic on many expressway bridges in mountainous areas volume, and particularly there are often heavy duty vehicles in the coal-producing regions. Most bridges show different degrees of disease in the operations many years later. Combing the bridge disease investigation, materials inspection and load test done on the background of the interchanges over Yicheng-Houma expressway, this paper will make assessment of the frequently-used box-girder bridges' bearing capacity in the expressway to provide a reference for bearing capacity assessment of the old expressway bridges in mountainous regions.