关键词:  , 桥墩, 裂缝, 检测分析, 结构分析软件, 加固

Abstract: There are a large amount of cracks at the bridge piers of Chifeng-Daban-Baiyin railway,which threat the driving safety. So we should analyse,repair and reinforce the structural cracks to improve the structure safety and prolong the service life. Through the detection and analysis of pier diseases in Machang extra-large bridge such as the body cracks,body concrete strength,and carbonization degree of concrete,this paper experimentizes and analyses the operation performance of the bridge. It adopts the structure analysis software ANSYS to achieve the simulation calculation of the stiffness,amplitude and natural frequency of bridge piers,studies the influences of pier diseases on the safety,and puts forward the effective methods to repair and reinforce the piers.

Key words: pier, fracture, detection and analysis, structure analysis software, reinforcement