Solutions

Long-span cable-stayed bridges experience significant thermal deformation of the girder during closure construction. This phenomenon is particularly pronounced in long-span steel cable-stayed bridges due to the large linear expansion coefficient of steel, and such deformation will impair the closure accuracy and quality of the bridge.

A special design of a multi-functional integrated damping device for this bridge is adopted, which integrates bridge incremental launching closure and damping shock absorption into a single unit and is equipped with an intelligent control system. During bridge closure, the device can provide an incremental launching force; in the course of closure connection, it real-time monitors the distance of the closure gap and adjusts the incremental launching force via the intelligent control system, ensuring that the spacing of the closure gap is maintained at a constant value without being affected by temperature. This solves the problem of temperature interference on the closure construction of long-span cable-stayed bridges. Its core advantage is that the bridge closure construction is free from the impact of natural conditions such as seasons and temperature.