点击次数：

所属单位：山东大学

发表刊物：Tunnelling and Underground Space Technology

刊物所在地：英国

关键字：Large cross-section tunnel，High burial depth，Tunnel stability，Model tests，Numerical simulation

摘要：For ensuring safety during the construction and use of a super-large cross-section tunnel, it is essential to understand the lining structure failure pattern and the instability of the surrounding rock mass under a high burial depth. With the Letuan Tunnel of China as an engineering background, we conducted large-scale geo-mechanical model tests and numerical simulations in this study. The results reveal the failure behaviour of the lining structure of a super-large cross-section tunnel and demonstrate the stress variation of the surrounding rock under overload conditions. Based on an analysis of the key protected areas as per the experimental results, the lining structure near the tunnel foot, vault, and entrance should be strengthened, and the stress of the surrounding rock near the middle rock wall, especially the tunnel sidewall and foot, should be focused on. Overloading safety factors were also determined through the overloading test. This study can provide a reliable reference for the design of support structures and safety control during the construction of a double-hole super-large cross-section tunnel in the deeply buried area.

论文类型：期刊论文

学科门类：工学

文献类型：J

卷号：109

页面范围：103756

字数：6437

是否译文：否

发表时间：2021-03-01

收录刊物：SCI