Abstract: The present invention refers to a method for determining the rigidity of a geological layer in terms of propagation velocity of the elastic waves within a geological system delimited by a free surface (2) and comprising at least one first geological layer (6) having a second rigidity and a second geological layer (5) having a second rigidity and being arranged below the first geological layer, said first and second layer being separated from each other by an interface (3), the method comprising the steps of: positioning a source (4) suitable to generate seismic waves in the second geological layer (5), whose rigidity is intended to be measured; activating said source of seismic waves; detecting at least one seismic signal by means of at least one sensor arranged coupling with the free surface, and determining—from at least one seismic signal—a shear velocity of the elastic waves in the second layer and thus indicating the rigidity of the second layer.

Abstract: A method for saturating cavities present in a mass of soil or in a body in general, comprising at least one step for at least partial filling of the cavity by introducing into the cavity a filler material in the solid state or in the fluid state and capable of setting. At least one step of saturating the cavity is then performed by introducing into the cavity a fluid synthetic substance which expands and sets by chemical reaction. The synthetic substance is adapted to generate, as a consequence of its expansion, at least the saturation of the cavity and a compaction and/or loading of the filler material introduced into the cavity in the filling step, creating an optional state of permanent tension on the walls that delimit the cavity, to the point of producing, if necessary, a deformation of the walls.

Abstract: A method for repairing and/or waterproofing and/or insulating and/or reinforcing and/or restoring the structural integrity of wall systems, which it consists in providing spaced injection holes within a wall system in a manner suitable to pass through cavities that exist in the wall system, inserting injection tubes in these holes, and then inserting a substance that expands after injection as a consequence of a chemical reaction so that the substance reaches the cavities connected to the injection holes or are proximate thereto, the injection tubes being, preferably gradually retracted along the injection holes in the opposite direction with respect to insertion, to allow the substance diffusing in cavities crossed by the injection holes or proximate thereto.