Temporary counterweight control method and system for concrete bridge cantilever closure construction

The invention relates to the technical field of bridge construction, in particular to a temporary counterweight control method and system for concrete bridge cantilever closure construction. Comprising the following steps that S1, the mass of a counter weight is determined according to the weight of a closure section, and the counter weight with the adjusted mass is hoisted to the position of a main pier on a main beam; s2, a counter weight is driven to move to the cantilever end of the main beam from the main pier in the bridge direction; and S3, closure section concrete is poured, the counter weight is driven to move towards one side of the main pier in the bridge direction according to the concrete pouring condition, and the deflection of the cantilever end of the main beam is kept unchanged all the time till closure section construction is completed. The concrete bridge cantilever closure construction temporary counterweight mode is very simple, the deflection of the cantilever end of the main beam is con