In situ testing
SCPTU rig
Designing
Technologies
Microblasting
Dynamic replacement
Jet Grouting
Pipe roofing
Vibro-Replacement and Grouted stone columns (VSS)
Vibroflotation
Continuous Flight Auger (CFA) piles
Soil displacement piles
Deep Soil Mixing (DSM)
Slurry walls
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Used to improve non-cohesive soil by compacting vibration.
Applied to sand and gravel, and also to non-cohesive mining waste and the like.
Consists in compacting the soil by means of an internal vibrator called 'vibrolance'.
In the initial phase the vibrolance is driven into the subsoil with the use of water jetting. Next, the vibrolance is pulled up in a reciprocal motion, which alters the grain size distribution, consolidates them and reduces the pore volume. As a result, the soil is compacted up to approx. 2.5 m around the vibrator. The visible indication of this is a reduced soil volume and a crater formed on the surface which is backfilled with aggregate (either original or brought in). Then the compaction process is repeated. When the compaction level improves the vibrolance begins to consume more power.
The effect
- Consolidated ground within the thickness of 3 to over 20 m.
- Increased load-bearing capacity and reduced risk of liquefaction of saturated subsoil.
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