Implenia and Herrenknecht donate drillhead to the Museum of Transport
Dietlikon, 23 June 2012 – Sissi, the historic tunnel boring machine, is to be preserved for posterity. All of nine-and-a-half metres in diameter and weighing 225 tonnes, she had a voracious appetite for stone. In favourable conditions, she ate through as much as 38 metres of rock in a day. Now, she is retiring. Behind her are eight years of hard work, performed to an accuracy […]