Taking the installation of the steel-concrete combination section of Oujiang Bridge as the research object,the paper analyzes the survey of the steel-concrete combination section,indicates the location difficulties,and illustrates the layout of the controlling points,observation distri-bution of the combination section,space location,and deformation observation,so as to ensure the installation accuracy of the steel-concrete com-bination section.%以瓯江大桥钢—混凝土结合段安装为研究内容，分析了钢—混凝土结合段的概况，论述了钢—混凝土结合段定位的难度，对控制点的布设、钢—混凝土结合段测点分布、空间姿态定位、变形观测等进行了阐述，以保证钢—混凝土结合段的安装精度。
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