宁波铁路南站钢结构雨棚张弦梁单侧张拉关键技术

Key Construction Technology in Unilateral Tension of Steel Beam String Structure of Ningbo South Railway Station

基于宁波铁路南站改建工程既有线施工的特点,提出了既有线钢结构雨棚张弦梁单侧分级跳拉施工方法,优化了单侧张拉施工方案,通过有限元分析、现场监测张弦梁变形和拉索振动频率等手段,解决了撑杆下节点构造优化设计、屋面找形、撑杆偏位等关键技术,取得了良好的技术效益。

Based on characteristics of the existing lines of Ningbo south railway station reconstruction project, this paper puts forward the unilateral grading jump construction method of existing steel structure canopy of beam string structures, optimizes the unilateral tensioning construction scheme through the finite element analysis and field monitoring deformation and vibration frequency lasso, and solves the key construction technology of the poles node structure optimum design, roof form finding, poles offset etc, achieving good technical benefits.