Tunnel Business Magazine

APR 2018

TBM: Tunnel Business Magazine is the market leader for North America. TBM is written for leading professionals in all aspects of tunneling and covers project stories, design elements, contracting strategies, legal issues, new technology and more.

Issue link: http://digital.tunnelingonline.com/i/958953

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Page 7 of 47

TERRATEC announced the on-time delivery of four new 6.56-m diameter earth pressure balance tunnel boring machines or the ongoing expansion of Istan o system in Turkey, following a number of recent factory acceptance tests. Thes ent number of TERRATEC machines working simultaneously in the city up to a total of seven. The r ve versatile mixed-face dome- style cutterheads with an opening ratio of about 35% that has proven to work extremely effectively in Istanbul's mixed geology – which includes low-strength sandstones, siltstones, limestones and shales – as well as other state-of-the-art features such as VFD electric cutterhead drives, tungsten carbide soft ground cutting tools that are interchangeable with 17-in. roller disc cutters, high torque screw conveyors and active articulation systems. e use ol JV on the Ümraniye-Atasehir-Göztep o contract, which was awarded in April 2017. The 13-km long line, along with 11 new sta onnections, will form a second north-to-south rail corridor under the densely populated Anato- lian side of the city and will be located entirely underground at an average depth of about 30 m. The Ümraniye-Atasehir-Göztepe project is one of five new metro lines currently being built by the Istanbul opolitan bers of the JV were so impressed with the performance of the TERRATEC machine use cidi- yek utb o, which is being built by the Gulermak, Kolin & Kalyon JV – and the progress of two other 6.56-m diam- t were delivered last year to the Senba - cilik-Kolin-Kalyon JV f o Line – that they were keen to employ a further four TERRATEC machines on this latest project. "Terratec is excited to be providing yet more machines to the metro projects in Istanbul," say eting Director, Bruc theson. "We are confident they will perform as well as previous machines have in the city and we look forward to breaking more records for on-time delivery, quick assembly and excellent production rates." Due for completion in 2019, the new lines will increase the city's curr o network to more than 480 km. TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // APRIL 2018 B U S I N E S S B R I E F S 8 TERRATEC Delivers Four More EPBMs to Istanbul

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