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本文结合某工程130m跨度的预应力弦张钢桁架结构安装中的拉索张拉施工,研究了大跨度弦张钢桁架预应力拉索的张拉施工工艺实时监测控制方法,包括桁架拉索的安装、基于施工仿真技术的现场张拉、张拉过程中的分析与调整、张拉过程中的实时监控等,特别是所涉及的主要施工顺序流程和关键的技术要点,研究解决了大跨度弦张钢桁架拉索张拉过程预应力难以控制、稳定性差的重大技术难题,其系统的综合技术可指导不同跨度预应力弦张桁架的高质量施工。
In this paper, the cable tensioning construction of a prestressed cable stringed steel truss structure with a span of 130m in a project is studied. The real-time monitoring and control methods for the tensioning construction technology of large-span string tension steel truss prestressed cables are studied, including the truss cables. Installation, on-site tensioning based on construction simulation technology, analysis and adjustment during tensioning, and real-time monitoring during tensioning, especially the main construction sequence flow and key technical points involved, researching and solving long span strings Zhang Gang truss cable tensioning process difficult to control the prestressing, poor stability of the major technical problems, the system’s integrated technology can guide different spans of prestressed string truss construction of high quality.