Expolink 2020, Dubai

Project type:

• Subway tunnel 

Application: 

• Precast segments

Partners: 

• Owner: Dubai Municipality
• Designer: Parsons Systra
• Contractor(s): JV Acciona – Gulermak
• Precast plant: Dubai Precast

The challenge

The internal diameter of the tunnel is 8,5 m (27.1 ft), the external diameter is 9.3 m (30.6 ft). The lining of tunnel consists of 1450 rings, made up of 7 segments each. To reduce the assembly time and to minimize corrosion, the traditional reinforcement in the ring segments was replace with steel fiber.

The solution

Dramix® 4D steel fibers protect precast segmental linings against any damage including spalling and bursting, making it the perfect fiber for this project. The concrete segments use C45/50 concrete reinforced with 40 kg/m3 of Dramix® 4D steel fibers. The entire project contains up to 1.200 ton of Dramix® steel fibers.