RESEARCH ON THE INTEGRATED TECHNIQUE OF CUTTING OFF COLUMNS AND JACKING OF BUILDING OR STRUCTURE

This paper introduces the integrated technique of cutting off columns and jacking of building or structure,in which several underpinning jacking platform structures and their comparative analysis is described to show that the steel-concrete composite structure being a more superior underpinning jacking platform system.It also introduces the systems of synchronized jacking and support,the control of jacking construction and the problems needed to be solved etc;finally,an example of the engineering application and its application effect are introduced.