中小跨径、低高度连续箱梁体外预应力加固技术研究  

Study on External Prestressed Reinforcement Technology of Small and Medium Span and Low Height Continuous Box Girder

作　　者：徐建 XU Jian(Zhejiang College of Construction,Hangzhou 310000,China)

机构地区：[1]浙江建设职业技术学院,浙江杭州310000

出　　处：《兰州工业学院学报》2024年第4期25-30,共6页Journal of Lanzhou Institute of Technology

摘　　要：结合某实际中小跨径、低高度连续桥梁结构,对其实施体外预应力加固。当体外索穿越墩顶横梁时,采用高压水切割技术从墩顶开槽的方式,不仅有效地增大体外索的有效高度、提高了体外索的有效性,而且作业空间不受限制,作业范围得到精确控制,作业时无振动,对钢筋(钢束)无损伤,有保护桥梁结构,效率高等优点。加固后桥梁结构扰度、应力改善明显,可为其他类似工程提供参考和借鉴。Combined with a small and medium span and low height continuous bridge structure,the external prestress reinforcement is implemented.When the external cable passes through the pier top beam,the high pressure water cutting technology is used to cut the groove from the pier top,which not only effectively increases the effective height of the external cable and improves the effectiveness of the external cable,but also has the advantages of unlimited working space,precise control of the working range,no vibration during operation,no damage to the steel bar(steel beam),protection of the bridge structure and high efficiency.The stress and disturbance of the reinforced bridge structure are improved obviously,which can provide reference for other similar projects.

关 键 词：中小跨径 低高度 连续箱梁 体外预应力加固 高压水切割工艺 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]