TBM tunnelling, metro and rail infrastructure for international contractors, from TBM assembly and tunnel plant operation to segment factories, stations and depots.
We work with leading contractors from Japan, Korea, Spain, Russia and Türkiye, including Taisei, Yapı Merkezi – SK, OHL – Dimetronic, Mosmetrostroy, Gama – Nurol and Kolin – Kalyon.
TBM erection, launch and back-up system installation.
Tunnel construction works with TBMs, Ø6.2–8 m, and TBM support on tunnels up to Ø13 m.
Slurry plant operation and tunnel mechanical systems.
Mechanical and steel works; design and manufacturing of TBM equipment.
Tunnel segment production facilities delivered on an EPC basis.
Stations, canopies, depots, maintenance buildings and rolling stock works.
TBM erection, launch and back-up systems
Slurry plant operation and tunnel logistics
Segment factories built on an EPC basis
Tunnel construction works, Ø6.2–8 m
Tunnel steel works and TBM equipment
Stations, canopies, depot and maintenance buildings
Interface management: we work inside the main contractor’s programme, handling site logistics, TBM interfaces, QA/QC records and HSE controls on live urban metro and tunnel sites.
TBM erection and tunnel construction works for Taisei Corporation.
Tunnel plant, TBM equipment and tunnelling works under the Bosphorus.
Mechanical and steel works, stations, depot and maintenance buildings.
Segment factory, administrative building and station works.
Rolling stock refurbishment, signalling, catenary and welded components.
| Project | Scope | Client |
|---|---|---|
| Marmaray – TBM erection | Tunnel boring machine erection | Taisei Corporation (Japan) |
| Marmaray – TBM tunnels | 4 × 4,500 m, Ø8 m tunnel construction | Taisei Corporation (Japan) |
| Marmaray – tunnels No. 1 and 2 | Mechanical and steel works | Gama – Nurol JV (Türkiye) |
| Marmaray CR3 | 13 station canopies, Gebze depot and maintenance buildings | OHL – Dimetronic SA JV (Spain) |
| Eurasia (Avrasya) Tunnel | Ø13 m TBM tunnel: slurry plant operation, mechanical and steel works, TBM equipment | Yapı Merkezi – SK JV |
| Melen 7 | 1 × 3,300 m, Ø6.2 m tunnelling works | Mosmetrostroy (Russia) |
| Dudullu – Bostancı metro | Segment factory construction (EPC) | Şenbay – Kolin – Kalyon JV / Lubrec |
| Dudullu – Bostancı metro | Administrative building and Kayışdağı station, civil and steel works | Şenbay – Kolin – Kalyon JV / Lubrec |
| Rail systems | Rail car and locomotive refurbishment, signalling and catenary | TCDD (Türkiye) |
| Rail components | Welded locomotive and wagon parts | Tülomsaş (Türkiye) |
Infrastructure and tunnelling is one of ASKAY’s delivery lines alongside energy, oil and gas terminals, power and water infrastructure, all offered under the same EPC, EPC+F and JV models.
Share your tunnel, metro or rail package and the scope you need, from TBM assembly and tunnel plant to segment factories, stations and depots.
Email info@askay.comASKAY Global Ltd · London, United Kingdom · +44 20 3011 0320
