粘性地层地铁盾构隧道管片结构力学特征研究

Study on the mechanical behavior of segmental structure of metro shield tunnels in viscous stratum

以南京地铁一号线为工程背景,采用现场试验的研究手段对穿越粘性地层的盾构隧道管片结构在施工全过程和稳定期的力学行为进行了系统研究,同时采用考虑结构与地层相互作用的梁-弹簧模型对其进行了有限元数值模拟分析,并将结果进行比较和综合,提出了粘性地层条件下地铁盾构隧道管片结构的设计原则与方法。

With the first line of Nanjing metro as background, mechanical behavior of the segmental structure of shield tunnels in the whole construction process and in the stabilized period has been comprehensively studied together with in - situ tests. And finite element numerical simulation analysis based onbeam - spring＇model has been adopted at the same time with the obtained results summarized and compared. In consequence, the design principles and methods for the segmental structure of metro shield tunnels in viscous strutum are put forward.