Rock chamber for storing gas, fluids and environmentally harmful waste - has rock surface sealed by membrane fixed to geo-textile, and then tightly attached to support beams

摘要

The membrane (7) and the geo-textile are fixed to support beams (3) so tightly that a vacuum can be applied between the rock (2) and the membrane (7). With the aid of the vacuum injection mortar (14) is inserted in all hollow spaces between the rock and the geo-textile (4). The vacuum counteracts the membrane being pressed into the chamber space (1)by pressure from the mortar. On injection, the mortar is formed exactly to the configuration of the geo-textile and the rock. No water drips can therefore occur in the mortar, which otherwise could penetrate the membrane.