Abstract：
The simplified model of a bridge in Sichuan is researched and Midas 2010 software is used to carry out analog calculation of existing integral and synchronous lifting, jacking and lifting in segments and steps, as well as new jacking and lifting method for continuous bridge. Factors such as number of jacking and lifting bases, sequence and displacement of single jacking and lifting, etc. are changed to obtain the beam unit stress variation curve of continuous bridge under different working conditions, analyze stress variation trend under various working conditions and research the jacking and lifting method with relatively optimized internal force.
