摘要
桥梁工程现浇梁施工中需要在两个桥墩之间搭设支架,并且需要对现浇支架进行预压,用于检测支架的稳定性,同时消除支架的非弹性变形。传统现浇梁支架通常采用堆载预压或水袋预压等方式,影响预压效果的因素较多且较难控制,并且预压过程存在较大安全风险。针对此问题,文章对现浇梁支架预压系统进行了研究,设计了一种现浇梁支架智能预压系统,该预压系统采用桁架结构,按照梁部荷载的分配情况模拟实际的受力工况可以达到预压的效果,通过在底模上铺设轨道,借助自带走行系统实现现浇梁的逐孔转换,并在某高速铁路现浇梁施工中成功应用,值得广泛推广应用。
In the construction of cast-in-place beam in bridge engineering,it is necessary to set up a support between two piers and preload the cast-in-place support to detect the stability of the support and eliminate its inelastic deformation.Traditional cast-in-place beam supports usually adopt preloading or water bag preloading.There are many factors that affect the preloading effect and are difficult to control,and there are great safety risks in the preloading process.In view of this problem,this paper studies the preloading system of cast-in-place beam support,and designs an intelligent preloading system of cast-in-place beam support by adopting truss structure.According to the distribution of beam load,the actual stress condition is simulated to achieve the effect of preloading.By laying the track on the bottom formwork,the hole-by-hole conversion of cast-in-place beam is realized by means of its own running system.It has been successfully applied in the castin-place beam construction of a high-speed railway,which is worthy of wide application.
作者
侯志强
HOU Zhiqiang(The Fifth Construction Ltd.of China Tiesiju Civil Engineering Group,Jiujiang 332000,Jiangxi,China)
出处
《工程技术研究》
2023年第5期177-179,189,共4页
Engineering and Technological Research
关键词
铁路现浇梁
临时支撑系统
智能预压
逐孔转换
沉降观测
railway cast-in-place beam
temporary support system
intelligent preloading
hole by hole conversion
settlement observation
