【摘要】 根据南里渡大桥拱肋吊装现场地形、地质和地物等情况,建立了独立的施工三维坐标控制网,并采用极坐标单向观测法对拱肋吊装全过程实施了切实可行的精密定位。此外,以气温、纵坐标和横坐标为网络输入,拱肋标高为网络输出,建立了拱肋标高的人工神经网络模型。更多还原

【Abstract】 According to conditions of feature,geography and geology of rib-hoisting construction of Nanlidu long-span bridge,the alone bridge construction control network of three-dimensional coordinates was established,and practical and viable precise position of the whole rib-hoisting process was adopted by single observation of polar coordinates.By taking temperature and horizontal coordinates as network input,and the rib-elevation as network output,the neural network model of rib-elevation was established.更多还原