Large Cavity Project
in the deepest underground
in the Power Plant Station in Kochi.

Large Cavity Project in the deepest underground
in the Power Plant Station in Kochi.

四国電力分水第一発電所改良土木工事
Objective Infrastructure Improvement
Techniques Ground Anchor
Period 04/2014~01/2016
Comment Construction of a large cavity (length: 54 m × width: 18 m × maximum height: 33 m) at 200 m underground.
PS anchors are placed upwardly from the ceiling to the wall to prevent rock collapse during cavity excavation and to ensure long-term stability.

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