Abstract: An installation for storing of natural gas or some other fluid comprises a lined underground storage space. Inside the rock wall of the storage space, there is a concrete layer for supporting an inner impermeable lining layer. According to the invention, the concrete layer has a crack distribution control reinforcement layer closer to the impermeable lining layer than to the rock wall in order to divide large cracks in to smaller cracks and to distribute the cracks over a larger area of the impermeable lining layer. Also according to the invention, there is provided between the impermeable lining layer and the concrete layer a non-binding sliding layer to facilitate relative movements between the impermeable lining layer and the concrete layer.

Abstract: An installation for storing of natural gas or some other fluid comprises a lined underground storage space. Inside the rock wall of the storage space there is a concrete layer for supporting an inner impermeable lining layer. According to the invention, the concrete layer has a crack distribution control reinforcement layer closer to the impermeable lining layer than to the rock wall in order to divide large cracks into smaller cracks and distribute the cracks over a larger area of the impermeable lining layer. Further, also according to the invention, there is between the impermeable lining layer and the concrete layer a non-binding sliding layer to facilitate relative movements between the impermeable lining layer and the concrete layer.