闸首空箱顶板裂缝成因分析与加固方案探讨  

Analysis of Causes of Cracks in the Roof of Lock Head Box and Discussion on Reinforcement Scheme

作　　者：陈灿明[1] 郭壮 何建新[1] 宫珂 苏晓栋 CHEN Canming;GUO Zhuang;HE Jianxin;GONG Ke;SU Xiaodong(Key Laboratory of Water Science and Water Engineering of Ministry of Water Resourees,Nanjing Hydraulic Research Institute,Nanjing,Jiangsu 210029,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]南京水利科学研究院水利部水科学与水工程重点实验室,江苏南京210029 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水利与建筑工程学报》2018年第5期157-161,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家重点研发计划项目(2018YFF0215005)

摘　　要：安徽某船闸是茨淮新河上大型水利枢纽工程的重要设施,投入运行26年后进行了全面安全鉴定。鉴定时发现下闸首兼作公路桥的空箱顶板严重开裂,影响船闸和公路桥的运行安全。根据下闸首空箱顶板裂缝的性状检测和承载力复核结果分析,原设计将下闸首空箱顶板双向受力状态简化为单向板计算、导致空箱顶板在桥宽度方向配筋不足是空箱顶板产生裂缝的主要原因。目前空箱顶板已超载破坏,结构承载性能严重下降。对粘贴碳纤维布加固法、粘贴钢板加固法和改变结构体系加固法等方案进行比选,推荐采用空箱顶板底面全断面粘贴碳纤维布的加固方案。The ship lock in Anhui is an important facility of a large-scale water conservancy project on the Cihuaixin River. After 26 years of operation,it has been carried out comprehensive safety assessment,and it was found that the box roof of the lower lock head as the road bridge has been severely cracked,which could affect the safety operation of the ship lock and the road bridge. According to the analysis of the properties of the cracks in the roof of the lock head box and the result of the bearing capacity,the original design simplifies the two-way stress state of the box roof of the lower slock head to the one-way plate calculation,therefore resulting in the lack of reinforcement of the box roof in the width direction of the bridge,which is the main cause of cracks in the box roof. At present,the box roof has been overloaded and the structure bearing performance has been seriously degraded. After comparing and modifying the carbon fiber cloth reinforcement method,the adhesion steel plate reinforcement method and the structural system reinforcement method,it is recommended to use a carbon fiber cloth reinforcement scheme for the full-section of the bottom surface of the box roof.

关 键 词：闸首 双向板 裂缝 承载力 加固 粘碳纤维布 

分 类 号：TV698.22[水利工程—水利水电工程]