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 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

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DSI Middle East W.L.L. (Formerly QACS)

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