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A New Type of Railway Tunnel Lining Jumbo with Grouting through Molds
(1 Engineering Management Center, China Railway Corporation, Beijing 100844; 2 China Railway 11th Bureau Group Co. Ltd., Wuhan 430061; 3 Construction Quality & Safety Supervision Department, China Railway Corporation, Beijing 100844)
Abstract In order to address quality defects of lining voids, cracking or spalling that occur in operating tunnels, and based on the practices of casting concrete by lining jumbos on site, a conventional tunnel lining jumbo is renovated and new technology is proposed for grouting of the secondary lining with molds . The stubborn void defects existing in conventional secondary linings are solved by injecting the micro-expansion retarded mortar, characterized by good workability and early-strengthening, through an embedded RPC pipe, which improves the quality of the tunnel lining and provides a solid support for safe tunnel operation in the future.
Abstract：
In order to address quality defects of lining voids, cracking or spalling that occur in operating tunnels, and based on the practices of casting concrete by lining jumbos on site, a conventional tunnel lining jumbo is renovated and new technology is proposed for grouting of the secondary lining with molds . The stubborn void defects existing in conventional secondary linings are solved by injecting the micro-expansion retarded mortar, characterized by good workability and early-strengthening, through an embedded RPC pipe, which improves the quality of the tunnel lining and provides a solid support for safe tunnel operation in the future.
GONG Cheng-Ming- 1 Zhu-Jia-Bin- 2 Dai-Hong-Ming- 3
.A New Type of Railway Tunnel Lining Jumbo with Grouting through Molds[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(4): 185-188
2016, Vol. 53 