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以哈大客运专线运粮河特大桥墩台沉降观测为背景,介绍了运粮河特大桥沉降观测的技术要求与观测方法。采用曲线拟合法综合分析了桥梁墩台的沉降变形趋势。运用灰色系统的新陈代谢GM(1,1)模型建立累积沉降的预测模型,预测结果表明该模型精度较高,可以用于累积沉降的预测,对今后的同类工程有一定的借鉴意义。
Taking the settlement of pier and abutment of Yun-liang River Bridge on Harbin-Dalian Passenger Dedicated Line as background, the technical requirements and observation methods of settlement observation of Yun’ning River Bridge are introduced. The trend of settlement and deformation of bridge pier and abutment is comprehensively analyzed by curve fitting method. The gray model GM (1,1) model is used to establish the cumulative subsidence prediction model. The prediction results show that the model has high precision and can be used for the prediction of cumulative subsidence. It is of some reference to the similar projects in the future.