Method and system for monitoring stable state of bridge swivel structure

The invention relates to a monitoring method for the stable state of a bridge swivel structure. The monitoring method comprises the following steps that the gradient of the swivel structure is obtained; and calculating a real-time ground clearance of a supporting leg of the swivel structure in the swivel process according to the gradient of the swivel structure so as to judge the stable state of the swivel structure. According to the monitoring method for the stable state of the bridge swivel structure, the conversion relation between the inclination degree of the swivel structure and the real-time ground clearance of each supporting leg of the swivel structure in the swivel process is established, the inclination state of the swivel structure is determined according to the real-time ground clearance of the supporting leg, and then the overall stable state of the swivel structure is comprehensively mastered. Intuition and effectiveness; and for different bridges with different structural features, normal thre