Modification Works and Trench Works for Sanko Enerji Kalkandere HEPP Y4 Approach Tunnel

In the existing 330-meter Y4 tunnel, the deformed areas were re-scanned and sectioned, and steel shoring was used for the entire 330 meters, supported with shotcrete concrete, and the geological voids that had previously occurred were filled with backfill concrete.

In addition, 130 meters of trench between the Y4 tunnel and the power plant was constructed.

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