Strand Tendons stabilize multi-level Interchange: 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).