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先张法板梁具有受力合理、构件轻巧、工艺简单、工序少、预制速度快、运输简捷、安装方便、节省锚具和波纹管、工程造价低、以及不因堵孔或压浆不密实而影响结构耐久性等诸多优点,目前仍然是我国中小跨径桥梁主要采用的一种结构形式。先张法板梁单根张拉技术经过多年的实践创新已日趋成熟,本工程通过改进先张板梁张拉工艺,采用精轧螺纹连接杆整体张拉,用工具连接杆替代板梁张拉锚固端两端的部分工作钢绞线,减少钢绞线材料损耗,节约成本;通过采用可纵横移动的横梁整体张拉体系,整体张拉提高张拉效率;精轧螺纹连接杆采用螺母式锚具锚固,提高了锚固的安全性,取得了良好的社会经济效益,可为同类工程提供参考和借鉴。
The first prefabricated beam has the features of reasonable force, light weight, simple process, few processes, fast prefabrication, simple transportation, convenient installation, saving of anchor and bellows, low construction cost, However, the durability of the structure and many other advantages, is still a small and medium-sized bridge in China is mainly used as a structural form. After a long period of practice and innovation, the single tensioning technology of pre-tensioned plate beam has become more and more mature. Through the improvement of the tensioning process of the pre-tensioned beam and the tensioning of the pre-tensioned threaded rod, Part of the work of strand, reducing the strand material loss, cost savings; through the use of vertical and horizontal beam tensioning system as a whole, the overall tension to improve the efficiency of tension; finishing threaded connecting rod anchored with nut anchors, improved Anchorage security, has achieved good social and economic benefits, for similar projects to provide reference and reference.