English：

The main span beam of the east extension of Xuefu Road across Taiping River Bridge isconstructed by jacking construction, which has the characteristics of large jacking span, wide beamstructure and long time required. Through on-site monitoring, combined with the construction plan, thestep displacement, offset and deflection in the jacking process are analyzed. The reasons for the deviationare analyzed as follows: the vertical jacking of the jacking equipment is not in place, the error of thetransverse movement of the transverse oil cylinder, the settlement of the temporary pier, the complex andchangeable environment of the jacking construction, and the large temperature difference between themorning and evening on the construction site. Therefore, targeted construction control measures areformulated to ensure the safety and stability of each structure during the beam stepping process.