高地应力在深埋隧道地震响应分析中的影响

摘要

Deep-buried tunnels are usually located in the earthquake-prone zones which means the studies of damage caused by earthquake is an important issue.Based on infinite theory ,a two-dimensional calculation model is built to analyze the stress ,displacement of the tunnel by using direct solving method.Considering the indeterminancy(or uncertainty) of the geo-stress value due to inevitable error of sampling ,several work condi-tions corresponding to each value are computed and compared.According to the analysis of the different condi-tions,the results show that geo-stress has a significant effect on the seismic response.And the analysis results can offer reference for aseismatic design of deep-lying tunnel.%本文在对地下结构抗震研究的基础上，基于无限元理论，使用直接积分解法，建立了二维隧道模型，并充分考虑因各种误差所带来的地应力值不确定性因素及岩石非线性的影响，对不同工况下的隧道周围应力及位移进行对比分析。结果表明，对于同一埋深，地应力不确定性因素对结果的影响显著，随着埋深的增加，地应力对地震动计算结果的影响也有较大的差异。