My first Magazine dsi-info-23-en | Page 128

Construction—EMEA—Qatar—Bridges DYWIDAG Strand Tendons stabilize multi-level Interchange in Qatar: The North Road Enhancement Project The national road network in Qatar was mainly built with roads consisting of 1 or 2 lanes in the 1970s and 80s. Within the last few years, traffic has greatly increased, which has led to ever-increasing traffic loads. As a preparatory measure for the 2022 FIFA World Cup, the government has therefore started a large scale program for expanding its road network. This program includes the expansion of the North Road, the main connection between Doha and the north of the country, from 2 to 4 lanes per direction. The North Road has a total length of 95.2km, connecting Doha to Madinat Al Shamal on Qatar’s North Coast. A large number of new interchanges, flyovers, undergrade crossings and roads are built for the expansion. In package P059, several large, multi-level interchanges, bridges and flyovers are being built. The post-tensioning systems for the bridge structures with a total of 3,700t of 128 strand tendons were supplied and installed by DSI Middle East, Qatar (formerly QACS) and DYWIDAG-Systems International GmbH, GBU, Germany. A total of 1,000 sets of Type MA 6837 Anchorages were required for the tendons. According to the specifications applicable in Qatar, the tendons were inserted in 80,000m of HD-PP plastic ducts. DSI also supplied the equipment required for the installation, stressing and grouting of the DYWIDAG Strand Tendons, including stressing jacks with a capacity of 9,750kN (approx. 1,000t). Owner Ashghal – Public Works Authority, Qatar General Contractor Tekfen Construction and Installation Co., Inc., Turkey Consulting Engineers KBR, Inc., Great Britain Consulting KEO International Consultants, Great Britain Subcontractor DSI Middle East, Qatar (formerly QACS) DSI Units DSI Middle East, Qatar (formerly QACS) and DYWIDAG-Systems International GmbH, GBU, Germany DSI Scope Production, supply, installation, engineering services, technical support, supervision DYWIDAG Products DYWIDAG Strand Tendons with 1,000 Type MA 6837 Anchorages