水库蓄水对既有隧道影响的稳定性分析

Study on the influence of the water-storing in a reservoir on the stability of an existing railway tunnel

通过数值方法,研究了沙沙坡水库对马蹄石隧道安全性的影响,对比分析了水库蓄水前后隧道位移、二次衬砌内力和安全系数的变化规律,给出了隧道结构需要加固或防护的依据。

The stability of Matishi tunnel affected by the Shashapo reservoir is studied by using numerical method.The rule of the variation of the internal forces,displace and safety factors of the tunnel＇s second lining are compared before and after water-storing in the reservoir.Results of the study provide the basis for strengthening and protecting the tunnel structure.