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上海南浦大桥浦东分引桥沿浦东南路快车道分成南北、上下四条分引桥。每条分引桥都有半径为90m的全现浇连续曲线梁,总长度999.4m,每条曲线梁又具有不同坡度的螺旋上升(或下降),构造比较复杂。由上海同济大学提供的曲线梁座标,均为平面直角座标系,如按常规的直角导线法测量曲线梁各桥墩的轴线、法线和切线,在比较空旷、通视条件良好的情况下还能应付。而浦东分引桥所处
Shanghai Nanpu Bridge Pudong sub-bridge along the Pudong South Road fast lane into North and South, up and down four points cited bridge. Each sub-bridge has a radius of 90m full cast-in-situ continuous curved beam, the total length of 999.4m, each curve has a spiral gradient with different slope (or down), the structure is more complicated. Curved beam coordinates provided by Shanghai Tongji University are all flat rectangular coordinate systems. For example, measuring the axes, normals and tangents of the bridge piers of curved beams according to the conventional right-angle lead method. In the case of relatively open and good viewing conditions Can cope. Pudong sub-bridge where the bridge