After many years of service,the old Hanhai Bridge has been unable to meet the requirements of the waterway.In order to im-prove the navigation standard of Gaoyou Tongyang Line,it will be demolished and rebuilt.Considering the safety requirements of the structural system transformation of the through tied arch bridge in the construction process,this paper puts forward a demolition scheme using the reverse demolition method.According to the proposed scheme,the old Hanhai Bridge is demolished.Each time the channel is occupied,the time is less than the specified 6 h,which ensures the smooth passage of the channel,shortens the total construction period by nearly 20 d,and ensures a good site environment for the construction of the new bridge.
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