Workshop on June 4, 2012 at the RUB
In recent decades the major portion of the investments poured into underground construction has been earmarked for infrastructure. However, what is known as upgrading existing structures is also becoming increasingly significant for tunnelling. Above all on the rail tunnel sector where roughly the half of the existing structures have reached the end of their intended service life, an enormous need for redevelopment has emerged. This is documented for example in the special tunnel issue “Redeveloping Rail Tunnels” from 2011 dealing with the situation in this field. This special issue was made...