๐ The equipment used for working in the tunnel is fascinating, including the tunnel boring machine and the cutter heads on the cutting wheel.
โ๏ธ The tunnel boring machine optimizes the arrangement of its bits based on the geology of the area, and stabilizing material can be placed in the rock behind the cutting wheel.
๐ง The machine pushes forward along the already built tunnel, filling the gap between the tunnel and rock with a fast curing mortar.
๐ ๏ธ Tunnel boring machines (TBMs) use segments to build tunnel rings and secure the excavation.
โฑ๏ธ Experienced teams can build a complete segment ring in about 25 minutes.
๐ง High strength steel fiber concrete is used for the segment rings, making them rigid and allowing for different curves in the tunnel.
๐ The tunnel boring machine continuously extends and suspends a belt from the tunnel vault for protection.
๐ง The tunnel is made waterproof by installing a weather and pressure resistant membrane.
๐๏ธ Concrete work is carried out using movable formwork and a mobile concrete plant on-site.
๐๏ธ The process of constructing a tunnel involves building a bridge for the tunnel boring machine to pass over.
โ๏ธ After the bridge is constructed, the tunnel floor and vault are completed using excavation material and strengthening techniques.
๐ฌ๏ธ Tunnel ventilation is achieved through a service gallery and ventilating air conduits suspended on the vault.
๐ง The tunnel is prepared for the installation of the inner vault and reinforced with prefabricated cages.
๐จ The arched framework is assembled and the formwork is filled with concrete.
๐๏ธ The formwork is adjusted precisely and the concrete is poured into the tunnel.
๐ The tunnel boring machine allows for a concreting stage every 24 hours.
โ๏ธ The concrete is supported by solid formwork tables until complete curing occurs.
๐๏ธ Marti Technic has planned and built all the equipment for the tunnel construction.
๐ญ The tunnel boring machine is constructed in a factory and then delivered to the construction site.
โป๏ธ Usable excavation material is stored and used for backfilling, while unusable material is transported elsewhere.
๐ง The renovation of the original tunnel tubes will begin in 2021, relying on special devices for building a solid replacement tunnel.