Rock grouting is generally used to seal rock masses, for the construction of dams and other underground structures like tunnels and caverns, or for the filling of large cavities, such as the karsts.
The injection of liquid suspension into rock happens directly from the unsupported borehole by using mechanical or hydraulic packers.
Goal of rock grouting is the filling of existing cracks or voids in the rock. For rock grouting usually stable cement suspensions based on normal or ultra-fine cements are used.
In recent times, the so-called GIN method has proved to be a very efficient system for rock grouting.
Control of the results of the injection is based on core drilling and water pressure tests (Lugeon tests).