Abstract:

The hydraulic crawlertype trestle with onetime construction length longer than 24 m is adopted for inverted arch secondary lining in large section of Zhongtiaoshan Tunnel so as to improve the construction quality of inverted arch secondary lining concrete and shorten the construction schedule. The construction environment has been improved; the construction safety has been guaranteed and the interaction between inverted arch secondary lining construction and tunnel face has been reduced. The results can provide reference for construction organization and construction quality management of similar projects in the future.

Key words: singletrack railway tunnel, inverted arch secondary lining, large section