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Abstract: Within the 10m diameter, 3.5km long Aked tunnel project, part of the Jerusalem-Tel Aviv Rapid Railway, construction of 14 cross passages between the tubes is being executed. Each one implies partially demolishing two rings, on each tube. To transfer the axial forces acting on the opened rings to the adjacent ones and thus provide stability to the lining, reinforced concrete keys installed on...
Abstract: The Diquís Hydroelectric Project is foreseen to have an installed power capacity of 631MW and is located in the southwest of Costa Rica in the General and Térraba rivers basins. The project’s headrace tunnel, which is due to transfer water from the upstream reservoir on the General river down to the underground powerhouse, in the vicinity of the Térraba river, is about 10.5km long and will...