基于Peck公式修正的盾构施工地表沉降预测研究

Prediction of Ground Settlement Induced by Metro Shield Construction Based on the Modified Peck Formula

城市轨道交通盾构法施工所引起的地表变形是施工中必须重视的问题。文章以广州地铁某在建盾构隧道工程为研究对象,分析了盾构施工时引起地表横向、纵向沉降规律。基于Peck公式提出了一种利用插值法、最小二乘法的预测模型,并将该模型应用到信息系统进行地表沉降预测。结果表明,提出的预测模型能够在监测数据非极值的情况下,对地表沉降进行较好地预测。该研究成果可为工程实践及理论研究提供参考。

Ground settlement caused by shield construction for metro tunnels should be given more attention in the field of rail transit. Based on a subway project under construction for the Guangzhou Metro, the rules of transverse and longitudinal ground settlement during shield construction are studied. A prediction model using the interpolation method and least square method based on the Peck formula is established. Prediction results of the model applied in an information system showed that ground settlement could be well predicted with this model on the premise of non-extremum of settlement, providing a reference for engineering practice and theoretical research.