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Abstract: Large diameter sewer tunnels can be built with either a two-pass or one-pass lining to protect the structural concrete from aggressive sewer gases, thereby lowering a tunnel’s maintenance needs and extending its life cycle. The use of a one-pass lining can reduce the construction schedule, save capital costs and improve overall quality. A one-pass lining solution is being applied for the first...
Abstract: The Tuen Mun - Chek Lap Kok Link - Northern Connection Sub-sea Tunnel Section project, in Hong-Kong, involved among others the construction of two 14m tunnels, linked by emergency egress cross-passages at regular intervals. The construction of these 57 cross-passages in soft ground under high water pressure was a real challenge to the entire project, both in terms of programme and construction...
Abstract: The Northern Landfall, part of the Tuen Mun Chek Lap Kok Link tunnel project, is a large reclamation on very soft Marine Deposits and Alluvium, inside which two large-diameter tunnels are to be bored. The realization of this challenging, world-record-holding project implies the use of consolidation under surcharge, to give the compressible soils enough strength to withstand the excavation of...