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全面阐述了南京长江三桥南主塔墩基础大型双壁钢套箱施工过程的测控技术 ,针对大型双壁钢套箱的特殊结构形式 ,研究了初步定位和精密定位的方法。采用三角形斜边量距法 ,有效地解决了水上浮动状态下钢套箱的接高难题和倾斜度等多项指标的控制 ,并论述了钢套箱精密定位特征点的找寻及钢护筒精密定位的方法等。
This paper comprehensively expounds the measurement and control technology of the construction process of the large-wall double-wall steel box pylon foundation of the south tower of the Third Nanjing Bridge in Nanjing. In view of the special structure of the large double-wall steel box box, the preliminary positioning and precise positioning methods are studied. Triangular bevel distance measuring method is used to effectively control the steel jackets in connection with high difficulty and incline and many other indicators of control, and discusses the precise positioning of steel casing box to find the characteristics and precision steel casing precision Positioning method and so on.