Abstract: In view of the problem of setting camber alignment of large span continuous beam bridge in cantilever construction, the influencing factors affecting the construction deflection were analyzed one by one, and the theoretical calculation formula of the camber of the continuous beam bridge in construction was calculated. For setting the camber alignment curve in construction of actual bridge, taking Juhe Bridge as an example, numerical methods were adopted for fitting. The results show that: in the engineering example, the determination coefficient of polynomial fitting is 0.844, which is generally consistent with the deflection curve of model; the determination coefficient of nonlinear fitting is 0.992 7 and the fitting results are excellent. The above two fitting methods can both be used in the calculation of the alignment of camber in construction, and the obtained results are reliable.

Key words: bridge engineering, camber in construction, influence factors, linear fitting, nonlinear curve fitting

摘要： 针对大跨径悬臂施工连续梁桥施工预拱度线形设置问题，逐一分析影响施工挠度的各项影响因素，并计算出连续梁桥施工预拱度的理论计算公式。 对于实际桥梁施工预拱度的线形曲线设置以沮河大桥为例，采用了数值方法进行拟合。研究表明：在工程算例中，多项式拟合确定系数为0.844，大体符 合模型挠度曲线；非线性拟合确定系数为0.992 7，拟合结果优秀。以上两种拟合方法均可用于施工预拱度线形的计算中，所得施工预拱度线形计算结果 可靠。

关键词: 桥梁工程, 施工预拱度, 影响因素, 线形拟合, 非线性曲线拟合