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隧道本身具有良好的抗震性能,但是近年来大量震害研究调查发现,穿越断层破碎带的隧道很容易遭受严重破坏,开展穿越断层破碎带隧道动力响应和减震措施研究具有重大现实意义。基于数值计算并结合雅泸高速公路勒不果喇吉隧道,研究了穿越断层破碎带隧道的抗减震措施。结果显示,减震层对穿越断层隧道的减震效果明显;合理减小隧道衬砌刚度,对穿越断层隧道减震是有利的。
The tunnel itself has good seismic performance, but a large number of earthquake damage studies in recent years have found that tunnels crossing the fault zone are prone to severe damage. Therefore, it is of great practical significance to study the dynamic response and damping measures of tunnels crossing the fault zone. Based on the numerical calculation and combining with the Lujiacuoji tunnel on Ya Lu Expressway, the anti-seismic measures of the tunnel crossing the fault fracture zone are studied. The results show that the damping effect of the shock-absorbing layer on the tunnel passing through the fault tunnel is obvious. It is beneficial to reduce the tunnel lining rigidity rationally and reduce the vibration of the tunnel crossing the fault.