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Abstract: Within the scope of the concept design of a new tunnel connection in Brussels (Belgium), aimed at strengthening the congested north-south railway link in the city, a novel tunnel lay-out combining multiple independent shield-driven tunnels was considered as a valid alternative for traditional tunnelling methods. By combining two or three shield tunnels, drilled consecutively at a very small...
Abstract: The design process of a segmental tunnel lining requires a correct identification of all loads acting on the precast concrete segments, both during construction as well as throughout the lifetime of the structure. The application of strain and ovalisation measurements during and after construction of the Liefkenshoek rail tunnel in Belgium has shown that the actions corresponding to the early...