随着我国铁路路网建设的逐步推进，大断面铁路盾构隧道不断涌现，对盾构隧道衬砌结构的安全性要求也越来越高。由于常见单层装配式管片衬砌难以满足铁路隧道下穿江河的防水防渗以及抗震设防等要求，双层衬砌的应用逐步开展。然而，目前国内外对双层衬砌隧道的抗震性能的认识尚存争议，因此开展盾构隧道双层衬砌抗震性能的研究十分必要。本文采用资料调研、室内试验、数值模拟与理论分析相结合的方式，研究了横、纵向地震作用下盾构隧道单/双层衬砌、管片与二衬不同接驳方式以及不同变形缝间距的双层衬砌地震响应规律，主要工作及研究成果如下：（1）开展室内试验探明了管片-围岩接触面剪切-滑移作用规律与界面关键参数，获得了不同层间接驳方式下管片-二衬层间接触面剪切-滑移作用规律，得到了管片间界面摩擦系数。（2）提出了能较真实反映管片-围岩剪切-滑移作用的迭代计算模型，提出了使用黏结接触模拟管片-二衬黏性行为的方法以及参数取值建议，采用隧道三维非连续接触模型分析了不同接驳方式、不同变形缝间距下隧道纵向刚度有效率，代入隧道轴向等效刚度模型分析了管片-二衬接驳方式与二衬变形缝间距对隧道地震响应的影响。（3）分析了横向地震作用下盾构隧道单/双层衬砌地震响应差异，相比单层衬砌，双层衬砌隧道横向内力明显减小、纵向内力显著增大，隧道纵缝张开量、环缝错台量、隧道顶底相对位移与横向弯曲以及管片损伤均有所减小。（4）分析了横向地震作用下双层衬砌隧道管片与二衬考虑不同接驳方式的地震响应差异，相比层间无摩擦，层间凿毛与植筋增大了横向地震作用下二衬承力效果，显著减小管片纵缝张开量、环缝错台量、隧道拱顶、底相对位移、横向弯曲与管片损伤，会导致二衬损伤增大，增强了管片与二衬变形协调性，对隧道抗震性能的提升有益，层间植筋相比凿毛效果更优。（5）分析了横、纵地震作用下双层衬砌隧道不同变形缝间距的地震响应差异，变形缝间距增大，二衬分担内力效果加强，但会导致管片纵向内力与纵向螺栓应力增大，管片与二衬损伤变大。同时变形缝间距对管片纵缝张开、环缝错台以及拱顶、底相对位移影响很小，对横向弯曲有一定减益作用。纵向地震作用下，变形缝间距增大能够显著减小管片环缝张开量，其中变形缝间距30m时效果更加显著。

With the steady progress of railway network construction in China, railway shield tunnels with large cross-section are constructed continuously, and the safety requirements of shield tunnel lining structure are higher and higher. Because the single-layered fabricated segment lining is difficult to meet the requirements of waterproof, anti-seepage and seismic fortification of railway tunnel when crossing rivers and seas, the application of double-layered lining is gradually adopted more and more. However, the understanding of the seismic performance of double-layered lining tunnel at home and abroad is still controversial at home and abroad.It is necessary to carry out research on the seismic performance of double-layered lining of shield tunnels. In this study, the seismic behavior of single and double lining, different connection between segment and secondary lining, and different deformation joint spacing of double lining for shield tunnel under transverse and longitudinal earthquake is invertigated by means of data investigation, indoor test, numerical simulation and theoretical analysis. The main work and research results are as follows:(1) The shear-slip action and interface friction coefficient of segment-surrounding rocks contact surface are obtained through direct shear tests, the shear-slip action of segment-secondary lining contact surface under different connection conditions is obtained, and the interface friction coefficient between segments is aquired.(2) An iterative calculation model that can reflect the shear-slip action of segment-surrounding rock is proposed. The method of simulating the viscous behavior of segment-secondary lining by adhesive contact and suggestions on parameter values are put forward. The effective efficiency of longitudinal stiffness of tunnel under different connection conditions and different deformation joint spacing is analyzed respectively by using three-dimensional discontinuous contact model of tunnel, Based on the stiffness efficiency, the seismic response of different connection conditions and different deformation joint spacing of segment and secondary lining is analyzed by using the Axial Equivalent Stiffness Model.(3) The seismic response difference of single / double lining of shield tunnel is analyzed under transverse earthquake. Compared with single-layered lining, the transverse internal force of double-layered lining tunnel is substantially reduced, the longitudinal internal force is significantly increased, the opening amount of longitudinal joint, the staggering amount of circumferential joint, the relative displacement and transverse bending of tunnel vault and bottom and the damage of segment are reduced.(4) The seismic response difference between the segment and the secondary lining of a double-layered lining tunnel is analyzed considering different connection conditions under lateral seismic action. Compared with the non-friction between layers, the chiseling and planting of reinforcement between layers increase the load-bearing effect of the secondary lining under lateral seismic action, and substantially reduce the opening amount of longitudinal joints, reduce the dislocation amount of circumferential joints, cut down the relative displacement between tunnel vault and bottom, control lateral bending and segment damage, which will increase the damage of the secondary lining and enhance the deformation coordination between the segment and the secondary lining, It is beneficial to improve the seismic performance of the tunnel, and the effect of planting reinforcement between layers is better than that of chiseling.(5) The seismic response difference of double-layered lining tunnel with different deformation joint spacing is analyzed under horizontal and vertical seismic action. The increase of deformation joint spacing will strengthen the internal force distributing effect of the second lining, but will lead to the increase of the longitudinal internal force and the longitudinal bolt stress of the segment and the damage of the segment and the second lining. At the same time, the spacing of deformation joints has little effect on the opening of longitudinal joints, staggering of circumferential joints and the relative displacement of arch crown and bottom, and has a certain beneficial effect on transverse bending. Under longitudinal seismic action, the increase of deformation joint spacing can significantly reduce the opening of segment circumferential joint, especially when the deformation joint spacing is 30m.

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