为保障连续梁桥悬臂施工的精度,保证桥梁线性符合设计要求,需要对合拢时的梁体标高和应力进行预测和控制。应用最小二乘支持向量机(LS-SVM)并借助Matlab工具箱建立预测模型,以标高和应力为研究参数,对比分析预测值与实测值,验证了最小二乘支持向量机(LS-SVM)在连续箱梁桥施工控制中的可行性和准确性。 In order to ensure the accuracy of cantilever construction of continuous beam bridge and ensure that the linearity of the bridge meets the design requirements, the elevation and stress of the beam body during closing should be predicted and controlled. The least square support vector machine (LS-SVM) was used to establish the prediction model with Matlab toolbox. The elevation and stress were taken as the research parameters. The predictive value and the measured value were compared and analyzed. The least squares support vector machine (LS-SVM) Feasibility and accuracy in construction control of continuous box girder bridge.