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通过大跨空间钢结构施工分析,掌握各关键施工阶段的结构状态,确定施工参数和理论目标值后,尚需确定施工控制项目、允许偏差和主控项目,并在施工中采取系列措施,保证结构成型质量。结合济南奥体中心体育馆弦支穹顶,综合对结构性能影响及相关施工允许误差兼容性,建议弦支穹顶撑杆垂直度的允许偏差为±1/150～±1/200;提出误差影响因子及计算方法,通过对比各控制项目之间的误差影响因子,确定各项目的优先控制顺序,从而确定最优先的主控项目;将群索结构中的拉索分为被动张拉索和主动张拉索。指出被动索的控制关键是索长,而主动索的控制关键是索力,并提出了拉索制作、被动索安装和主动索张拉的系列控制措施。
Through the analysis of the construction of steel structures in large-span space and grasping the structural status of each key construction stage, after determining the construction parameters and theoretical target values, it is necessary to determine the construction control projects, allowable deviations and main control projects and adopt a series of measures during construction to ensure Structure forming quality. Combined with the suspend dome of Jinan Olympic Sports Center Gymnasium, the allowable deviation of perpendicularity of the struts is suggested to be ± 1/150 ~ ± 1/200 according to the comprehensive influence on structural performance and the allowable error compatibility in construction. The error influencing factor and Calculation method, by comparing the error between the control factors affecting factors to determine the priority control of each project order to determine the most priority of the master project; the cable structure of the cable into passive tension cable and active tension Cable It is pointed out that the key to the control of the passive cable is the length of the cable, and the control key of the active cable is the cable force. A series of control measures such as cable manufacturing, passive cable installation and active cable tensioning are proposed.