基于非等时距GM(1,1)模型的深基坑形变预测研究

Research on deformation prediction of deep foundation pit based on GM(1,1)model

针对深基坑形变监测数据非等间隔的特点,将非等时距GM(1,1,)模型及其两种优化模型应用于某深基坑沉降监测过程中。通过实测数据建模预测沉降变化趋势,结果表明:三种模型精度均合格,优化灰色作用量后的模型与实测值之间残差最小,更适合此类工程的预测。

According to the characteristic of unequal interval of deformation monitoring data of deep foundation pit,the unequal interval GM(1,1,) model and the two optimization models were applied to the settlement monitoring process of a deep foundation pit.Changing trend of settlement was modeled and forecasted by the measured data.Results showed that the accuracy of the three models was qualified,and the residual error between the model after optimizing the grey action amount and the measured value was the smallest,which was more suitable for the prediction of such projects.