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- W2201712455 abstract "This article describes challenges posed in two-year boring of tunnel through difficult ground as part of the six-year Weser tunnel project, which passes under the Weser River in northwest Germany. It is a 1.6 km long twin tube design and opened on January 20, 2004. The tubes are connected by four cross passages and as the only crossing of the Weser River in the lower Weser region are expected to carry about 20,000 vehicles a day. It is considered a crucial infrastructure improvement. The tunnel's deepest point is 40 meters below sea level and rises to a level as shallow as 12 meters. Additional cut and cover approaches were dug to finish the alignment. The mixed geology is comprised of varied sequences of cohesive Holocene soils as well as Tertiary sand. Adding to the complexity, the tides' wide range created significant changes in groundwater levels. Key problems were limited access to the machines for inspection and maintenance because of challenges in stabilizing the working face and increased wear and tear when passing through heavily cohesive segments. For the second tube, adjustments were made based on experiences boring the first. Improvements included reducing energy consumption by half and more accurate control of slurry pressure. A VMT guidance system enabled the tunnel to be bored perfectly on line. The article also features a section describing the construction of the four cross passages, which required use of ground freezing and shotcrete lining with an advance crown drive." @default.
- W2201712455 created "2016-06-24" @default.
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- W2201712455 date "2004-03-01" @default.
- W2201712455 modified "2023-09-24" @default.
- W2201712455 title "TBM DEVELOPMENT AT THE WESER TUNNEL" @default.
- W2201712455 hasPublicationYear "2004" @default.
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