Abstract The double deck system of road tunnel is of large cross-section. To investigate its characteristics under dynamic action large-scale shaking table tests are performed. Through comparison the seismic performance between a double deck tunnel model and a simple tunnel model, the effects of interior structure on the seismic performance of the segmental linings are investigated. The detailed responses of the refined lining rings and interior structure as double deck lanes can be applied to evaluate the seismic performance of the tunnel system. It is found that the presence of interior structure prevents the cross-sectional deformation but increases dynamic normal earth pressures along the external surface of the segmental linings. Additionally, the presence of interior double deck structure induces adverse effects on the extension/closure of the longitudinal joints in the upper half of the segmental linings. Failure to consider the interior structure would overvalue the cross-sectional deformation of the segmental linings, but underestimate the dynamic normal earth pressure on linings.

中文翻译：

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双层车道内部结构对管片衬砌抗震性能的影响

摘要 公路隧道双层系统为大断面。为了研究其在动态作用下的特性，进行了大型振动台试验。通过双层隧道模型与简单隧道模型的抗震性能对比，研究了内部结构对管片衬砌抗震性能的影响。精细衬砌环和内部结构作为双层车道的详细响应可用于评估隧道系统的抗震性能。发现内部结构的存在阻止了截面变形，但增加了沿管片衬砌外表面的动态法向土压力。此外，内部双层结构的存在会对管片衬砌上半部分纵向接头的延伸/闭合产生不利影响。不考虑内部结构会高估管片衬砌的横截面变形，而低估衬砌上的动态法向土压力。