长大隧道穿越断层带拟动力分析模型研究

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。

Study on Quasi-dynamic Analysis Model of Long Tunnel Passing through Fault Zone

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.