The Research Of The Key Of Bridge Jack-up About The Zhejiang Fuchunjiang First Bridge

Bridge lifting technology as a new type of bridge strengthening, replacing the bearingand other important technical measures have been applied to the actual bridge project, it hasunparalleled advantages in the treatment of insufficient clearance under the bridge and bridgesettlement and bridge bearings aging caused by level increase and route transformation.Therefore, bridge lifting technology has attracted much attention.Due to the bridge jacking technology development for a relatively short time, liftingtechnology is increasingly mature process; Due to the differences in jacking construction ofbridges in no unified jacking method, some key technology in actual engineering applicationis often based on the engineering experience of design and construction, Led to a number ofkey technology has many problems in different engineering.On the basis of summing up system of comprehensive arrangement to lifting technigue inthe bridge engineering application,this paper have researched of the key of bridge jack-upabout the Zhejiang fuchunjinag first bridge.It studies hold colum beam of fresh and hardedconcrete interface performance,lifting the local bearing capacity, temporary rigid supportstability and the stability of limit design in the bridge jacking engineering, developed thefeasible implementation plan; Analysis of the lifting of monitor data changes, reach in liftbridge internal force change, just the supporting stress state, fracture strain, demonstrated bythe research of the key technique in the actual engineering application.