In this case, it's sheep. About 200 litres of lanolin - the wax or grease extracted from sheep's wool - will be used to help slide the project's giant tunnel boring machine into position so that it can start excavating the second of the twin motorway tunnels.
"Shifting Alice is probably one of the most technically challenging tasks of the whole Waterview project," says the Transport Agency's highway manager, Brett Gliddon. "It's not unusual internationally to turn a tunnel-boring machine, but what makes this operation extraordinary is the sheer size of Alice - she is the 10th largest of her kind in the world - and the very tight space the project team has to manoeuvre and turn her. "That's where the lanolin from our sheep plays its part.作者: Jackpot 时间: 2014-12-29 19:44:34