Deformation Character and Application of the High Tower-pole of Bridge

摘要

Combining with the 190-height tower-pole of Nanjing Second Yangzi river bridge, the dynamic deformation proceed of the high tower-pole is measured using precise GPS dynamic positioning technology and high precision total station positioning technology, and wind speed and temperature are simultaneously measured. The data is analyzed and processed. The dynamic models about the tower-pole is studied, and the data of the dynamic models are diagnosed. The characters and rules of daily deformation about the high tower-pole are summarized. The effects of the heat radiation and wind pressure to the tower-pole deformation are analyzed. The changing status of torsional angles is calculated. Combining with filtering wave analysis and spectrum analysis methods, The effects and rules of temperature and wind pressure to the high tower-pole deformation is discussed. It shows that the deformation of the tower-pole can be predicted by surveying temperature and wind speed. According to the established models, the reversed values of the location under different temperature and wind pressure is calculated in the course of the installation of the bridge steel box beam. It is valuable to guarantee the quality of the bridge.