What’s going on Underground? Tunnelling into the Future
Presenter: Robert Mair
Published: January 2010
Age: 14-19 and upwards
Views: 840 views
Source/institution: Royal Society
Urban congestion is a serious problem in many cities, so the creation of underground space and in particular the development of underground transport is environmentally essential. How can tunnels be built in ground sometimes as soft as toothpaste? What can go wrong?