以秦岭隧道工程为背景,运用拟动力数值模拟,研究了穿越断层的隧道在发生地震时的稳定性与地震响应.通过对拟动力数值计算,分析穿越断层破碎带时,隧道纵向的响应特征.得出以下主要结论:基于超前地质预报信息,获得数值模拟计算参数,建立了用于模拟发震断层的拟动力计算模型;①由断层错动引起衬砌的内力变化主要集中在活动断层附近,距离断层破碎带越远,衬砌所受断层影响越小,内力也越小;②所建模型基于静力计算,较动力计算更为便捷.%Based on Qinling Mountains Tunnel project,using quasi-dynamic numerical simulation method,the stability and seismic response of tunnel going through fault is studied.By developing a quasi-dynamic numerical model,longitudinal response of tunnel going through weak fault shuttered zone is analyzed,following conclusions are made:advanced geology forecast is used to obtain fault geology information and calculation parameters of numerical simulation.Quasi-dynamic simulation model of earthquake inducing fault line is developed.①Internal force changing induced by the fault lining moving mainly focus near the fault area.Influence of the fault would gradually fade away with the distance increasing,so would the internal force;②the numerical model based on static calculation developed in the paper is convenient than dynamic calculation.
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