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Erschließungsstollen Tscharner
Switzerland, Péry
2000 – 2001

The cement company Vigier Cement AG is located in Péry-Reuchenette (Switzerland). To guarantee the supply of raw materials for the coming 80 years, the company planed to develop a new quarry in the "Tscharner" area. For this, a 2,325-meter-long development tunnel had to be constructed tackling an altitude difference of almost 200 meters. Due to the prognosticated geological conditions consisting of medium to coarse limestone with isolated marl formations and potential clayey debris zones, tunnel securing was playing a major role.

The 9.53-meter machine, designed for this task, was the first large-diameter Gripper TBM produced by Herrenknecht. It was equipped with a relatively short cutterhead, which allowed for early rock support. In view of the prognosticated geological conditions, rock support is integrated in the design in form of a permanent securing system. Two roof bolting units are mounted only four meters behind the cutterhead. Auxiliary equipment such as probe drilling or shotcrete units could also be integrated.

After 12 months of successful tunnelling, the machine reached its target dead-on on March 19, 2001. The Tscharner Tunnel is the first trendsetting reference project for Herrenknecht in Alpine hard rock tunnelling in Switzerland to be followed by many more epoch-making projects.

Data Sheet

Country, Location

Switzerland, Péry

Year

2000 – 2001

Application

Road

Geology

Rock
Lime, marl, clay

Tunnelling length

2,324 m

Machine Data

1x Gripper TBM:
Diameter: 9,530 mm
Lining method: Rock support
Cutterhead power: 2,100 kW
Torque: 3,607 kNm

Your contact person Contact us

Jack Brockway President and CEO Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser COO Herrenknecht Tunnelling Systems USA, Inc.