预应力桥梁波纹管堵塞加固处理技术应用探讨  

Discussion on Application of Reinforcement Technology for Corrugated Pipe Blockage of Prestressed Bridge

作　　者：张玉明[1,2] 秦元昊[1] 谭天乐 ZHANG Yuming;QIN Yuanhao;TAN Tianle(Shandong Jianzhu University,School of Civil Engineering,Jinan 250101,China;Engineering appraisal and reinforcement Research Institute Co.,Ltd of Shandong Jianzhu University,Jinan 250013,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东建筑大学工程鉴定加固研究院有限公司,济南250013

出　　处：《结构工程师》2022年第5期148-154,共7页Structural Engineers

基　　金：2020国家自然科学基金重点项目(52038006)。

摘　　要：大跨桥梁预应力施工过程中波纹管堵塞后的开槽处理,会对桥面板截面造成较大削弱,影响结构的承载力及使用性能。对大跨桥梁横桥向波纹管堵塞后的加固处理进行了研究,提出了在原桥面板顶面补增预应力筋、新浇配筋混凝土叠合层代替原顶板上垫层做法的加固方案。计算结果表明,此种加固方案,桥面板的总厚度和桥面荷载没有增加,开槽后张拉的原预应力筋和补加的预应力筋共同保证了结构的抗裂性能;桥面板结构层厚度增大,保证并提高了结构的承载能力。可为同类型工程的加固处理提供借鉴与参考。The slotting treatment after bellows are blocked in the prestressed construction process of long-span bridges will greatly weaken the bridge panel section and affect the bearing capacity and service performance of the structure. This paper studies the reinforcement treatment of large span bridge after the bellow is clogged,and puts forward the reinforcement scheme of adding prestressed tendons on the top surface of the original bridge panel and replacing the cushion layer on the original roof with new reinforced concrete composite layer.With this reinforcement method,the calculation results show that the total thickness of the bridge deck and the load on the bridge deck do not increase. In addition,the re-stretched original prestressed tendons and supplementary prestressed tendons together ensure the crack resistance of the structure. The thickness of the structural layer of the bridge deck increases,which ensures and improves the load-bearing capacity of the structure. It can provide reference for the reinforcement treatment of the same type of engineering.

关 键 词：预应力 波纹管 堵塞 桥梁加固 叠合层 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]