吊连共筋装配式水泥混凝土路面传荷性能研究  

Load Transfer Performance on Prefabricated Cement Concrete Pavement with Hanging and Connecting Shared Reinforcement

作　　者：方明镜 柯文汇 周然 李云建 李少杰 FANG Ming-jing;KE Wen-hui;ZHOU Ran;LI Yun-jian;LI Shao-jie(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,Hubei 430070,China;Wuhan Municipal Construction Group Co.,Ltd.,Wuhan,Hubei 430023,China;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070 [2]武汉市市政建设集团有限公司,湖北武汉430023 [3]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《公路交通科技》2024年第3期43-49,60,共8页Journal of Highway and Transportation Research and Development

基　　金：湖北省住建厅科技计划项目(202023);武汉市市政建设集团有限公司科技计划项目(202105)。

摘　　要：针对具有双向传力特征的“吊连共筋”体系装配式水泥混凝土路面板间传荷能力不明晰的问题,采用自主研发的扣压式反向张拉连接件,将埋设于预制路面板内部的横向主筋与纵向主筋成对机械连接,并采用自密实水泥砂浆灌入填充接缝,开展路面板双向连接的装配式水泥混凝土路面现场试验,得出了预制水泥混凝土路面板间水平极限抗拉及竖向传荷能力,并结合路面板铺装传荷数值模拟,分析了吊连共筋装配式水泥混凝土路面板间传荷性能影响因素。结果表明,自主研发的单组连接件可承受约53 kN极限拉力,纵横双向连接可为路面板提供约300 kN水平抗拉能力,板间平均传荷效率达到75%,而基层调平后可将板间传荷效率提升到80%以上。板间传荷效率与板间机械连接刚度正相关,当机械连接刚度达到钢筋一体连接的1/4时,可实现一体化连接效果。传力连接布设间距不应小于0.3 m,且建议设置在路面板行车荷载轨迹下方。同时,装配式水泥混凝土路面宜采用柔性基层材料,且接缝处基层脱空对板间传荷效率及平整度影响较大。装配式水泥混凝土路面铺装前,尤其需要注意对接缝处基层找平及密封防水。研究结论为新型装配式水泥混凝土路面板间连接方式及结构组合设计提供了技术参考。In order to solve the problem that the load transfer capacity between prefabricated concrete pavement slabs of the‘hanging and connecting shared reinforcement’system with two-way force transmission characteristics is unclear,the self-developed buckle type reverse tensioning connectors are used to mechanically connect the transverse main reinforcement and the longitudinal main reinforcement embedded in prefabricated pavement slab in pairs.The self-compacting cement mortar is applied to fill the joints to carry out the field test of prefabricated cement concrete pavement with two-way connection between pavement slabs.The horizontal ultimate tensile and vertical load transfer capacity between precast cement concrete pavement slabs are obtained.The influencing factors of load transfer capacity between prefabricated cement concrete pavement slabs with hanging and connecting shared reinforcement are analyzed by combining the numerical simulation of load transfer between pavement slabs.The result shows that the horizontal ultimate tensile capacity of one single self-developed connector can be up to about 53 kN,and the pavement joints in transversal and longitudinal direction equipped with self-developed connectors can provide 300 kN of horizontal tensile capacity for pavement.The average load transfer efficiency(LTE)between slabs is about 75%,and the satisfied leveling of base layer can increase the LTE between slabs to more than 80%.Moreover,the load transfer efficiency between slabs is positively correlated with the mechanical connection stiffness of pavement joints,when the mechanical connection stiffness reaches 1/4 of integrated reinforcement connection,the integration effect can be realized.The spacing between connectors should not be less than 0.3 m,and the connection is suggested to be arranged below the wheel load tracking of road surface.In addition,the flexible base material is recommended to be used in the assembled pavement,and the void of base layer at the joint has a great influence on the load transf

关 键 词：道路工程 装配式路面 现场试验 数值模拟 预制混凝土板 传荷能力 机械连接 

分 类 号：U416.217[交通运输工程—道路与铁道工程]