Tunnel clearance Belchen

The first 820 m of tunnel were excavated during the past few weeks using the impressive tunnel boring machine. The tunnel tube is being con­ti­nuous­ly secured with segment rings.

The invert arch has been sealed, rein­forced and con­cre­ted on the first 540 m. The pre­fa­bri­ca­ted service tun­nel ele­ments were trans­ferred onto the com­ple­ted invert arch as well as sealed and back­filled. The rein­force­ment trans­port carriage has already been po­si­tio­ned in front of the tun­nel tube at the southern portal. Currently the form­work carriage is being installed. The si­mul­ta­neous ex­ca­vation and inner lining present a challenge in terms of orga­ni­zation on the con­struction site. 

Marti Tunnelbau AG

Marti Technik AG

Marti Gruppe
Seedorffeldstrasse 21
3302 Moosseedorf
+41 31 388 75 75