World Amazing Stuff: Largest tunnel boring machine pictures

Largest tunnel boring machine pictures



The world's largest tunnel boring machine was built by Herrenknecht AG, Germany

The machine is 15.43m (50ft) in diameter, 135 meters long and 2,300 tones of weight. It can dig approximately 26 meters long and fifteen and half meters wide automobile tunnel each day. It is already recorded in Guinness world record of 2013.