天井山隧道变形与结构受力监测与分析

Monitoring and Evaluation of Deformation and Stress in Supporting Structures of Tianjingshan Tunnel

针对天井山隧道主要为Ⅳ级和Ⅴ级破碎围岩的特点,开展隧道施工期变形、结构受力和围岩深部位移监测与分析,根据监测结果对隧道稳定性进行评估与预警,并及时调整支护参数,保证了隧道施工安全性。研究表明,对于复杂地质条件公路隧道的施工,加强现场监测与分析,及时反馈,实现动态设计和施工,对于节约成本、保障安全具有十分重要的意义。

This paper presents the monitoring results of tunnel deformation, stress in supporting structures and rock mass displacement during the construction of Tianjingshan Tunnel. The surrounding rock mass can be classified as IV or V grades, which are the broken rock masses. The tunnel stability was evaluated and predicted based on the monitoring results. The sup- porting parameters were adjusted based on the tunnel stability evaluation. The results indicate that, the construction monitoring, analyses and information feedback have significant importance for highway tunnels under complicated geological conditions. It has also signification importance for the cost saving and safety assurance.