Many underground shield tunnels in Japan have exceeded the 50-year service life of the initial design,and the majority of the NTT steel shield tunnels have experienced varying degrees of corrosion and water leakage.This paper takes a shield tunnel of NTT as an example.Three-dimensional models were estab-lished to study the reinforcement effect of secondary lining on the tunnel.The results show that the secondary lining can provide a large bearing capacity,which can increase the bearing capacity limit value by 0.6 times.
维普
万方数据