Incredible Engineering: The Secrets of Switzerland's Tunnel Boring Machine
Exploring the process of tunnel construction in Switzerland using a tunnel boring machine. Learn about segment construction, concrete pouring, and ventilation.
00:00:14 A look at the equipment used for tunnel construction, including the tunnel boring machine. The machine breaks rock fragments and pushes forward along the tunnel.
🔍 The equipment used for working in the tunnel is fascinating, including the tunnel boring machine and the cutter heads on the cutting wheel.
⚙️ 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.
🚧 The machine pushes forward along the already built tunnel, filling the gap between the tunnel and rock with a fast curing mortar.
00:01:57 Discover how a tunnel boring machine works as it builds a tunnel using segment construction and high strength concrete. Drilling and de-dusting are essential in this process.
🛠️ Tunnel boring machines (TBMs) use segments to build tunnel rings and secure the excavation.
⏱️ Experienced teams can build a complete segment ring in about 25 minutes.
🔧 High strength steel fiber concrete is used for the segment rings, making them rigid and allowing for different curves in the tunnel.
00:03:37 Explore the workings of the biggest tunnel boring machine in Switzerland. Learn about the construction process and the waterproofing techniques used.
🔑 The tunnel boring machine continuously extends and suspends a belt from the tunnel vault for protection.
🚧 The tunnel is made waterproof by installing a weather and pressure resistant membrane.
🏗️ Concrete work is carried out using movable formwork and a mobile concrete plant on-site.
00:05:20 This video explains the process of tunnel boring machine work in Switzerland. It covers various stages of construction and ventilation in the tunnel.
🏗️ The process of constructing a tunnel involves building a bridge for the tunnel boring machine to pass over.
⚒️ After the bridge is constructed, the tunnel floor and vault are completed using excavation material and strengthening techniques.
🌬️ Tunnel ventilation is achieved through a service gallery and ventilating air conduits suspended on the vault.
00:07:01 This video showcases the installation process of reinforcing cages and concreting of a tunnel using a tunnel boring machine. The formwork plays a crucial role in ensuring the structural integrity of the tunnel.
🚧 The tunnel is prepared for the installation of the inner vault and reinforced with prefabricated cages.
🔨 The arched framework is assembled and the formwork is filled with concrete.
🏗️ The formwork is adjusted precisely and the concrete is poured into the tunnel.
00:08:43 A video about the construction process of a tunnel using a tunnel boring machine, showcasing the careful concreting and coordination of special equipment.
🔑 The tunnel boring machine allows for a concreting stage every 24 hours.
⚒️ The concrete is supported by solid formwork tables until complete curing occurs.
🏗️ Marti Technic has planned and built all the equipment for the tunnel construction.
00:10:24 Learn how a tunnel boring machine works in Switzerland, where Marty's special devices enable the construction of a replacement tunnel in challenging geology.
🏭 The tunnel boring machine is constructed in a factory and then delivered to the construction site.
♻️ Usable excavation material is stored and used for backfilling, while unusable material is transported elsewhere.
🚧 The renovation of the original tunnel tubes will begin in 2021, relying on special devices for building a solid replacement tunnel.
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