特长公路隧道场地地震危险性分析

Seismic Risk Analysis for Site of Extra Long Highway Tunnel

地震危险性分析是做好工程设施抗震设防的关键,以阿尔金山隧道工程场地为工程依托,采用概率地震危险性分析方法,对该地区潜在震源区模型进行了层次空间划分,通过借鉴外地地震活动确定了震源模型的地震活动性参数和相应的衰减关系,并计算了该地区50年超越概率63%、10%、5%水平下的地震危险性。研究结果可以作为阿尔金隧道工程场地地震危险性及风险评估的参考资料,也可为类似工程场地地震危险性分析提供参考。

Seismic risk analysis is the key to seismic protection of engineering constructions.Based on the site of Aerjin mountain tunnel project,probabilistic seismic risk analysis method was used to divided the hierarchical space of potential source area model in this area,and was determined the seismicity parameters and corresponding attenuation relationship of source model by referred to other seismic activities.The 50 years exceeding probability of seismic risk was calculated at the level of 63%,10%and 5%in this area.The research results can be used as a reference material for the Aerjin tunnel project site with respect to the seismic risk and risk assessment,and can be provided reference value for the seismic risk analysis of similar projects,too.