软土区受地铁基坑开挖影响的古建筑沉降预测研究

为了减少宁波市新建地铁基坑对邻近古建筑的影响,地铁车站附属基坑开挖需要精细化的沉降变形监测。依据该市老城隍庙古建筑沉降监测数据,运用GM(1,1)灰色预测理论构建沉降预测模型。研究结果表明:古建筑沉降预测值与实测值一致性较好,说明该灰色理论预测模型精度较高,可用于宁波市古建筑后期沉降的预测和控制,对地铁工程周边建筑环境的保护有着重要意义。

Study on Settlement Prediction for Ancient Buildings Affected by Excavation of Metro Pit in Soft Soil Area

In order to reduce impact on the ancient buildings adjacent to the foundation pit of metro newly built in Ningbo,the excavation of foundation pit attached to the metro station requires careful monitoring on settlement deformation.Depending on the data from the settlement monitoring on the ancient buildings in the old cit god temple,the prediction model was established with GM (1,1) gray prediction theory.The study result shows that,for the settlement prediction for ancient buildings,the predicted and measured values agree well,and the model herein gets such high accuracy that it may be used to prediction and control of later settlement of ancient buildings in Ningbo,and has important significance on the protection of environment surrounding metro engineering.