Abstract:

The lining structure plays a vital role in the safe operation of cutandcover tunnels, and the dislocation of lining ring will affect the safety of the tunnel entrance structure. Based on the site investigation and numerical simulation, the causes and countermeasures for the dislocation of lining ring of an asymmetricallypressured cutandcover section of a tunnel in East China are analyzed in this paper. The study results show that the lining ring dislocation is mainly related to lateral pressure of soil on the slope. In addition, countermeasures, such as slope displacement monitoring and slope feet and asymmetricallypressured wall balanced backfilling, are suggested, and the results show that these countermeasures achieve good effect. The paper can provide reference for the similar projects in the future.

Key words: asymmetricallypressured tunnel, cutandcover method, lining ring dislocation, disease treatment, numerical simulation, balanced backfilling method