By improving the ground processes we mean proceduress in the soil under the foundation with the purpose of changing nature of the soils and with a view to:

• increase soil shear strength
• reduce the compressibility of the soil
• reduce the permeability of the soil

Improving soil deep vibratory compaction has great advantages with regard to cost and execution time, is used for foundations on singles, strips and base plate, on the ground of insufficient capacity. For load-bearing gravel piles no tie reinforcement. Stupnjaka average diameters ranging from Ø 60 to Ø 80 cm