上海某桥梁梁底缺陷分析及处理措施  

Analysis and Treatment of Some Bridge Girder's Defect in Shanghai

作　　者：谢石连 梁治国 张晓松[3] 

机构地区：[1]上海城市管理学院土木工程与交通学院,上海200438 [2]上海市基础工程有限公司,上海200002 [3]上海市政工程设计研究总院,上海200092

出　　处：《施工技术》2011年第11期79-81,共3页Construction Technology

摘　　要：上海市苏州河某桥梁采用预应力混凝土连续箱梁,张拉过程中5号节段梁底出现混凝土剥落、损伤、钢筋脱钩等缺陷,不能满足设计要求。经分析为钢筋数量不足、局部混凝土径向应力过大所致。采用修补钢筋、浇注混凝土、重新张拉等方法修复。修复结果表明,梁体强度和梁体质量均达到要求,取得了满意的工程效果。Some bridge at Suzhou River in Shanghai uses the prestressed concrete continuous box girder.During prestress tension,some defects appear at the girder bottom of No.5 segment,such as scalped concrete and out of hooks of reinforced steel bars,which can＇t meet the requirements of the designers.According to analysis,the defects are caused by shorts of reinforced bars and extra expansiveness of lateral prestressed of partial concrete.Supplement of reinforced bars,refilling some concrete,re-expanding the bars are the solutions.Repairing results show that both the strength and the quality of girder meet the requirements.

关 键 词：桥梁工程 修复 缺陷 预应力混凝土 连续箱梁 

分 类 号：U447[建筑科学—桥梁与隧道工程]