以一个实际工程为例，研究了既有地铁隧道上方开挖基坑对隧道的影响，并从基坑开挖卸载及降水两方面进行了分析，对卸载产生的回弹和降水产生的沉降均采用传统的分层总和法进行了计算，同时利用有限元法进行了校核，与实测结果比较吻合。%Taking a practical project as an example,the influence of foundation pit excavation and dewatering on the existing metro tunnel is stud-ied. It was analyzed from the two aspects of unloading and dewatering,the rebound produced by unloading and the settlement produced by dewa-tering were calculated using the traditional layerwise summation method,and checked by the finite element method,it is coincide with the experi-mental results.
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