This VIBRO Project technique has the duel effect of densifying suitable soils and also reinforcing the Soil-column matrix using a top feed method.
How It Works
The soil is penetrated to the required depth by the combined effect of the Vibroflot weight, vibration and jetting action by air and/or water. If only air is used, the in-situ soil is displaced sideways. By using only water, disturbed material is also flushed from the hole.
The Vibroflot is lifted out. Coarse gravel, crushed stone or crushed aggregate is tipped into the hole in increments of about 500mm. The Vibroflot is re-inserted and compaction begins. Radial forces produced by the vibrator force the added material horizontally out against the in-situ soil.
When the required degree of compaction has been reached, the Vibroflot is removed again. The filling/compacting cycle is repeated step by step to the surface. In this way, a dense column of granular material interlocking with the surrounding ground is formed through the treatment zone.
