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深圳宝安体育场为目前国内最大的轮辐式空间索桁架结构,具有索的数目多、成形过程结构刚度变化大、成形后索的张力大等特点,是目前最具难度的索工程之一。结合工程特点,对结构成形总体方案的选取、成形过程的仿真模拟、成形过程中结构的稳定性、成形控制等关键问题做了详细分析,为结构张拉施工提供依据。在理论分析基础上,施工时引入大型结构自动化整体移位系统,对36根径向索用72台千斤顶同步张拉。现场施工及测试结果表明:成形方案选取合理,理论分析与实测吻合,大型结构自动化整体移位系统大大提高了张拉效率。
Shenzhen Baoan Stadium is the largest spoke cable trussed truss structure in China. It has the characteristics of large number of cables, large changes in the stiffness of the forming process and large tension of cables after forming. It is one of the most difficult cable projects at present. According to the engineering characteristics, the key problems such as the selection of the general scheme of the structure forming, the simulation of the forming process, the stability of the structure in the forming process and the forming control are analyzed in detail, which provides the basis for the construction of the structure. On the basis of theoretical analysis, large-scale structure automatic whole-shift system was introduced during construction, and 72 jacks of 36 radial cables were synchronously tensioned. The field construction and test results show that the selection of forming scheme is reasonable, the theoretical analysis is in good agreement with the actual measurement, and the large-scale structure automatic whole shift system greatly improves the tensioning efficiency.