Why Tunnels Don’t Collapse If you ever wondered why tunnels don’t collapse here is a good video on it. Facebook Prev Article Next Article Engineering Checkout these cool gadgets... Related Posts 3D Printed Objects that are Otherwise “Unmanufacturable” How to Maneuver an 800-Ton Column Using Remote Controlled Robots Turning Shipping Containers into Water Purifying Centers The World’s Deepest Buildings The Largest Spiral Escalator Ever Built Just Opened In Shanghai Engineering Mega Pumpkin Launchers