Cengiz Holding constructs highways and railways as well as highway and railway tunnels. The Company completed the construction of Ilgaz, Ovit and Zigana tunnels. Zigana Tunnel, longest in Turkey with a total length of 14,5 km also the longest highway tunnel in Europe. Ovit Tunnel is the fourth longest in Europe with a total length of 12,6 km. These projects are managed by Turkish engineers employed by Cengiz İnşaat. Tunnels were built in Sarajevo in line with EU standards by Cengiz İnşaat.
WITHIN THE SCOPE OF HIGHWAY AND RAILWAY TUNNEL CONSTRUCTION WORKS;
The total length of highway, railway and subway tunnels completed or in progress in Turkey and abroad we have undertaken the commitment as by Cengiz İnşaat reaches 558 km.
Project Processes
- Trabzon – Aşkale Road Zigana Tunnel,
Trabzon, Turkey
Completion date, June 2023
It is the longest double tube highway tunnel in Turkey and Europe.
Road Length: 15,11 km
Road Standard/Width: 2×2 / 16 m – 22 m
Bridge-Viaduct No/Length/Area: 6 Nos / 772 m / 5.173 m²
Tunnel No/Length: 2 Nos / 28,952 km
- 5C Corridor Highway Zenica Tunnel Work
Zenica, Bosnia -Herzigova
Completion date, May 2021
- Road Length: 3,85 km
- Road Standard/Width: 2×2 / 27,5 m
- Bridge-Viaduct No/Length/Area: 3 Nos / 600 m / 13.800 m²
- Tunnel No/Length: 2 Nos (double tubes, 2 * 3,725 km = 7,45 km in total)
- Excavation/Fill:1.862.000 m³
- Concrete: 31.460 m³
- Ovit Tunnel
Rize, Turkey
Completion date, December 2018
Ovit Tunnel is the fourth longest in Europe with a total length of 12,6 km.
- Çamlıca Tunnel,
İstanbul, Turkey
Completion date, May 2018
- Ilgaz Tunnel,
Kastamonu-Çankırı, Turkey
Completion date, December 2016
