某高速公路M特大桥维修加固技术应用研究

Technology research on application to the maintenance and reinforcement for the M grand bridge in a highway

某高速公路M特大桥在交工通车4年后,主桥箱梁产生较多病害,已经危及到结构的安全,经检测设计,决定对其中的混凝土破损、露筋采用结构胶加固,而对于裂缝,根据所在的部位和对结构的影响程度,分别采用封缝灌浆、粘贴碳纤维布以及粘贴钢板等工艺措施,经处理后,加固效果达到了预期。

The main girder of M grand bridge in a highway has lots of disease after put into running for four years and these disease has endangered the safety of the structure. After inspecting and designing, using structural adhesive to reinforce the damaged concrete and the exposed reinforcing bar. To the crack, according to their positions and the affection to the structure , treatments like joint caulking and grouting, affixing carbon fabric and affixing steel plate etc. were effective reinforcement measures and got expected result.