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针对增加衬砌厚度往往对提高结构抗震性能效果甚微的问题,提出了通过合理选取系统锚杆参数来增强隧道抗震性能的思路.在静力分析和动力分析两个阶段探讨了不同工况下锚杆及衬砌的受力状态,研究了结构动力响应特征及最大响应值随锚杆参数的变化规律,并对锚杆参数优化问题进行了分析.结果显示:增设墙脚处锚杆可大幅提高隧道抗震性能,同时,锚杆长度及布置方式对结构受力影响较大.
Aiming at the problem of increasing the thickness of lining, which has little effect on improving the seismic performance of the structure, the idea of enhancing the seismic performance of the tunnel by reasonably choosing the parameters of the system’s anchor rod is proposed. In two stages of static analysis and dynamic analysis, The dynamic response characteristics of the structure and the maximum response value with the parameters of the anchor are studied, and the optimization of the parameters of the anchor is analyzed.The results show that the addition of the bolt at the foot of the wall can greatly improve the seismic resistance of the tunnel At the same time, the length and arrangement of anchor rod have a great influence on the structure stress.