地铁隧道穿越既有车站的沉降预测及加固措施

Settlement Prediction and Reinforcement Measures for a Metro Tunnel Passing Under an Existing Metro Station

文章结合北京地铁7号线某区间隧道施工工程实例,用经验法、分析法和数值模拟法预测了隧道施工穿越既有地铁车站引起的地表沉降;并提出在地铁下穿既有车站时,采取深孔注浆、小导管注浆等方式来加固土体,以达到控制地表沉降值的目的,同时满足既有车站的行车安全。

Using a tunnel on the Beijing Metro line 7 as an example, this paper predicts the surface selilemenl induced by tunnel excavation underneath the existing metro station using empirical methods, analytical methods, and numerical simulation. Soil reinforcement by means of deep-hole grouting and small pipe grouting was adopted where the tunnel passes under the existing metro station, which controls the surface settlement and ensures traffic safely within the existing stalion