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根据动力有限元理论,利用ABAQUS有限元软件,研究不同因素对浅埋双洞隧道地震响应规律的影响,同时研究了减震层对隧道的减震效果。结果表明:双洞隧道的隧道间距要合理选取,过小的间距会大大增加隧道的地震响应;增大隧道衬砌结构的刚度并不是提高隧道抗震性能的好方法,柔性衬砌反而更有利于提高隧道的抗震性能;良好的围岩能有效提高隧道的抗震性能,在隧道的设计与施工中,应注意保持围岩的完整性与稳定性;加设减震层能有效地减小隧道在地震作用下的响应,但应注意选取合适的减震材料。
According to the dynamic finite element theory, the influence of different factors on the seismic response of shallow double-hole tunnels is studied by using ABAQUS finite element software. At the same time, the damping effect of the buffer layer on the tunnel is studied. The results show that the tunnel spacing between two tunnels should be chosen reasonably. Too small spacing will greatly increase the seismic response of the tunnel. Increasing the stiffness of the tunnel lining structure is not a good way to improve the seismic performance of the tunnel. The flexible lining is more conducive to improving the tunnel The good surrounding rock can effectively improve the seismic performance of the tunnel. In the design and construction of the tunnel, the integrity and stability of the surrounding rock should be kept; adding the damping layer can effectively reduce the seismic effect of the tunnel Under the response, but should pay attention to select the appropriate damping material.