某高速公路隧道二衬结构安全性评价

Safety Evaluation of Secondary Lining Structure of a Highway Tunnel

作为隧道的主要承重结构,二次衬砌设计得是否合理不仅关系到隧道施工期的安全,并且对隧道以后的通车运营养护有着较大影响。文中以某座在建高速公路隧道为依据,选取两种隧道埋置深度,分析了Ⅳ及Ⅴ级围岩下二次衬砌的内力分布,并根据相应规范要求,对二次衬砌进行安全评价,以期对类似隧道提供参考。

As the main load-bearing structure of tunnel,the design of the secondary lining is not only related to the safety of the tunnel construction period,but also has a great impact on the operation and maintenance of the tunnel.Based on a highway tunnel under construction,this paper selects two kinds of tunnel buried depth to analyze the internal force distribution of the secondary lining under the fourth and fifth class surrounding rock,and carries on the safety evaluation to the secondary lining according to the corresponding standard requirements,aiming to provide some reference for the similar tunnel.