中文摘要：

为了研究地下通道明挖施工对地铁隧道上浮的影响,基于地铁隧道上浮变形实测数据,分析地下通道开挖过程中下卧地铁隧道上浮变形的统计规律.采用小应变硬化土模型,开展二维有限元数值模拟,研究地下通道开挖过程中下卧隧道的上浮规律.结果表明,在地下通道基坑的开挖过程中,下卧地铁隧道的上浮变形与卸载率近似呈线性关系;基底不同水平位置隧道上浮变形连成的包线随着卸载率的增加,由直线型发展为抛物线型,最终呈双峰线型.

英文摘要：

The statistical law of uplift of the metro tunnel during excavating was analyzed based on the measured results in order to analyze the influence of open-cut tunneling on uplift behavior of the underlying metro tunnel.The two-dimensional numerical analysis considering the small strain of soil was conducted in order to investigate the law of uplift of the underlying metro tunnel during the excavation of underground passage.The calculation results indicated that the uplift displacement of the underlying metro tunnel during extra long excavating was approximately linear with the unloading ratio.The envelope curve connected with the uplift displacements of metro tunnel at different horizontal positions of excavation basement developed from straight type to parabolic type,and finally bimodal type with the increase of the unloading ratio.