By Ashley Karen
As 2TDK reported, over 13 kilometres of tunnel pipes are being excavated currently.
Recently, they celebrated the breakthrough of the shortest tunnel on the route, and the work is far from completion with the breakthrough.
Many more works are required before the railway tracks installation in the tunnel.
The work continues with the construction of the secondary lining of the tunnel, after completing the tunnel excavation and support.
It was split into several sub-phases; construction of the cast concrete floor vault with a formed central drainage channel, construction of longitudinal foundations, implementation of the tunnel waterproofing and drainage system, construction of the inner vault, design of installation kinetics and filling concrete.
This will complete the work in the tunnels under the contracts for the main construction works.
Part 3 will be carried out as part of a different contract. Under this part, a track on a rigid base will be constructed in the tunnel, el. rolling stock, signal safety and telecommunication devices and electrical equipment of tunnels.
