Abstract: The synchronous construction of the secondary lining during the boring of large-diameter shield faces challenges such as the design of the lining jumbo, the high requirements on the performance for the lining jumbo, the organization of the construction activities in the small and confined area, the horizontal transportation for shield boring and high safety management requirements. A super-long invert lining construction jumbo, as well as the matching California switch, is developed, which provides solution for the confliction between the invert lining construction and the horizontal transportation. The procedure and method for the synchronous operation of the shield boring and the secondary lining are developed by referring to the synchronous construction of the secondary lining during the boring of the TBMs in hard rocks. Due to the adoption of the synchronous operation of the shield boring and the secondary lining, the construction period is shortened and the construction cost is reduced. The paper can provide reference for the synchronous construction of the secondary lining in similar projects in the future.
Keywords: large-diameter shield-bored tunnel; synchronous construction of secondary lining; super-long invert lining construction jumbo; California switch; “arch + side wall" lining jumbo
Source: Chinese Railways No.5 2023 Serial No.61
