Method for top lifting and heightening frame bridge

• Main Authors: WANG RUXIANG, ZHANG YINCHENG, ZHANG HONG, LIU JIE, BAO JUNXIN, CAI ZHONGZE, HU CHUANSHUI, WANG ZHIXIAN, LIU ZHENHUA
• Format: Patent
• Language: Chinese; English
• Published: 08.10.2008
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; OR VIADUCTS

The invention discloses a lifting and heightening method for frame bridge, which adopts the following construction steps: 1. The wall body of the bridge body is cut and cushioned temporarily; 2. A jack is installed; 3 the bridge body is lifted at stable pressure and slow speed; 4. The steel bars of the wall body of the bridge body are welded and bond, the supported framework is filled with concrete; 5. The bridge top performs waterproof treatment and the joints perform waterproof treatment. In the method, by cutting down the wall body, the bridge top plate and partial wall body are lifted and heightened, after lifted up to the designed standard height, the wall bodies at four sides are welded with main bars and bond with distribution bars and stirrups, and then are filled with concretes to heighten the partial wall body, thereby realizing heightening of frame bridge and reaching current use requirements. In the method, no bridge body needs to be detached during construction, no scaffold needs to be used, no t