悬臂现浇梁0号段施工缺陷分析及对策研究  

CONSTRUCTION DEFECT ANALYSIS OF NO.0 SECTION OF CANTILEVER CAST-IN-PLACE BEAM AND COUNTERMEASURE RESEARCH

作　　者：孙中华 李彩红 孙冬梅 SUN Zhong-hua;LI Cai-hong;SUN Dong-mei(Tiesanju Group In The Sixth Engineering Co., Ltd., 030600, Jinzhong, Shanxin, China;Economic & Technology Research Institute, State Grid Shandong Electric Power Company, 250000, Ji'nan, China;Zhengzhou City Rail Transit Co., Ltd., Operating Company, 450000, Zhengzhou, China)

机构地区：[1]中铁三局集团第六工程有限公司,山西晋中030600 [2]国网山东省电力公司经济技术研究院,济南250000 [3]郑州市轨道交通有限公司运营分公司,郑州450000

出　　处：《建筑技术》2019年第3期358-360,共3页Architecture Technology

基　　金：铁路预应力混凝土矮塔斜拉桥建造技术研究(股份公司重点-2016-6)

摘　　要：从梁体钢筋绑扎、预应力管道定位、混凝土配合比优化、混凝土浇筑及振捣、大跨度梁施工线形控制、预应力智能张拉及压浆等方面分析悬臂梁0号段的施工缺陷,制订防止缺陷的措施,解决了钢筋绑扎过程中间距偏差大,预应力定位不准确,梁体线形控制不到位不及时,混凝土浇筑不到位振捣不密实等问题,保证了大跨度桥跨结构的施工质量和使用寿命,消除了后期运营中的安全隐患。This article carries on the research analysis to No.O section of the cantilever cast-in-place beam, focusing on assembling reinforcement, prestressed pipe positioning, optimizing mix proportion of concrete, concrete pouring and vibrating, linear control during the construction of long span bridge, and prestressed intelligent tensioning and intelligent grouting etc. It makes effective measures to prevent defects, which can solve the problem, such as pitch deviation during assembling reinforcement, positioning inaccurate, linear control without in place or in time, non-compactness of concrete pouring. It can ensure the quality of the long span bridge structure and the application of life, eliminate the potential safety hazard in the later operation.

关 键 词：悬臂现浇梁 四定位技术 定点振捣技术 角钢卡具 

分 类 号：TU755[建筑科学—建筑技术科学] U24[交通运输工程—道路与铁道工程]