My first Magazine dsi-info-23-en | Page 131

Construction—EMEA—Saudi-Arabia—Excavations On the one hand, it served to stabilize the excavation, and on the other hand, it served as buoyancy control for the building. For this purpose, DSI Construction Germany produced and supplied 1,183 double corrosion protected, 63.5mm Ø GEWI ® Plus Tension Piles. In addition, to prevent uplift, 997 double corrosion protected, 75mm Ø GEWI ® Plus Micropiles were used in the station floor slab. Due to the fact that the station had to be completely impermeable, DSI developed watertight special solutions for both systems in cooperation with the contractor. DSI engineers continuously supervised and checked the correct installation of the systems. Owner Arriyadh Development Authority (ADA), Saudi-Arabia General Contractor ArRiyadh New Mobility (ANM) Joint Venture, consisting of Ansaldo STS S.p.A. and Salini Impregilo S.p.A., both Italy, Larsen & Toubro Limited and Nesma and Partners Contracting Co. Ltd., both Saudi- Arabia and Bombardier Inc., Canada Contractor Nesma and Partners Contracting Co. Ltd., Saudi-Arabia Subcontractor Sonar Sondaj, Turkey Engineering One Works S.p.A., Italy DSI Unit DYWIDAG-Systems International GmbH, BU Geotechnics, Germany DSI Scope Development, production, supply, engineering services, technical support, supervision DYWIDAG Products 1,183 63.5mm Ø GEWI ® Plus Tension Piles, 997 75mm Ø GEWI ® Plus Micropiles 131