09 July 2021 | News

IFK – Implenia Frutiger Kerenzerbergtunnel – Vertical shaft

In mid-June we started excavating a new vertical shaft for the company IFK – Implenia Frutiger Kerenzerbergtunnel.

The ventilation shaft has a length of approximately 140m and a final diameter of 4.5m. The excavation is carried out by means of Raise Boring technology in medium abrasion limestone.

The pilot hole phase with 12″ 7/8 rods has already been successfully completed. A deviation of only 5cm was recorded over the total length of 140m.

Finished the boring phase to complete the excavation to a diameter of 4.5m, the project was successfully completed in late August 2021.

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