How The Channel Tunnel Works

Summary by Krater

This video examines the 30-year history and engineering marvel of the Channel Tunnel, detailing its geology, tunnel boring machines, pressure management, and ventilation systems connecting the UK and France.

From the video

Answers: How was the Channel Tunnel engineered and built?

• Channel Tunnel engineering
• tunnel boring machines
• geology of the English Channel
• ventilation systems in long tunnels
• rail infrastructure between UK and France

What it concludes

• The Channel Tunnel is the longest underwater tunnel in the world.
• The Channel Tunnel was funded entirely by private investors.
• Earth pressure balance machines were used to handle immense pressure in softer soils like the French side.
• A service tunnel acts as a pilot, a ventilation duct, and an emergency escape route connecting the two rail tunnels every 375 meters.
• Piston relief ducts solve the piston effect created by trains pushing air through long tunnels.
• The Channel Tunnel project relied on a massive cooling system due to the extreme heat generated by trains.