Key Technology of the World's Heaviest Gear Tooth Rail Swivel Cable-stayed Bridge

During the swivel construction of a large-tonnage cable-stayed bridge, a single spherical hinge is susceptible to be damaged from excessive force. Consequently, this paper suggests a multi-point support swivel method of gear rails. The paper introduces a multi-point support swivel system of large-tonnage gear-tooth-rail, along with the swivel construction and monitoring technology. Models of the spherical hinge are established. Results indicate that the force applied to the spherical hinge is reasonable, exhibiting a gradual increase in contact stress from the center to the outer edges. The distribution of Mises stress differs from the distribution of contact stress. The force applied by the driving device is reasonable, ensuring the safety and feasibility of the proposed approach. The findings have guiding significance for future engineering.