Fortius supplies strengthening products for the tunnelling industry and all civil engineering applications throughout the world.
Says the company: “The use of synthetic fibres for plastic shrinkage control and fire-resistance endurance in tunnel linings is growing. Steel fibres, used instead of conventional steel reinforcement, can provide superior performance with reduced costs from materials, time and labour. They are durable solutions to difficult support or rehabilitation problems.”
Glass fibre rebars, are used to stabilise the front of tunnels and to make a “Softeye” in the start- and/or endshafts for tunnelling with TBMs.
Fortius again: “Breaking through the reinforced concrete of the shafts with a TBM has always been a challenge for the tunnelling contractors. This is because the TBM cannot dig through the wall reinforced with conventional steel reinforcement. But this problem has been resolved through the development of the Aslan GFRP rebars.”
These glass fibre rebars are claimed to have twice the strength of steel rebars, but can, says Fortius, easily be cut by a TBM. “This,” the company explains, “makes them ideal as reinforcement in the area were the TBM will exit or enter the shaft. This is called the ‘Softeye’.”
Recent examples of the use of the Aslan GFRP rebars include the tunnel crossing of the River Thames in London and the Barcelona Metro.
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By GlobalDataFortius
Tel: +32 13 326873
Email: info@fortius.be
Web: www.fortius.be
Fortius supplies strengthening
