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The Tunnel Challenge
BUILDING BIG Home Page BUILDING BIG Site Map BUILDING BIG Labs BUILDING BIG Databank BUILDING BIG Glossary
Bridges
Domes
Skyscrapers
Dams
Tunnels
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Tools and Techniques

Throughout the ages, people have developed all kinds of tools and techniques for digging tunnels. Some were more successful than others! Click on an icon to learn more about each one:

fire-setting Hand Tools Gunpowder
Fire-Setting Hand Tools Explosives
Compressed Air Drill Tunnel Boring Machine Tunnel Shield
Compressed
Air Drill		 Tunnel Boring Machine Tunnel
Shield

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