- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 18 Jan 2019
Vibro-compaction for ground improvement
Vibro-compaction is a ground improvement technique that can be used to transfer structural loads to suitable levels in poor ground conditions. The effect of vibration consolidates and strengthens the ground, helping to compact non-cohesive soils such as sand that would otherwise be unsuitable for construction. Since cohesive soils don’t respond to vibration, this process is not suitable for those ground conditions.
It can be a cost-effective alternative to piled foundations and grouting and can be used for structures such as buildings, embankments, dams, tanks, towers and so on. However, the site must be large enough to accommodate and justify the plant that is required. By consolidating loose sands before construction of raft foundations, this method may be more economical than piling.
Another similar method is vibro-replacement.
Vibro-compaction works by using a vibrator suspended from a crane to penetrate to the design depth. Water jetting is often used to aid penetration. The energy of the vibrations reduces the forces acting between the soil particles which allows them to become denser.
Once the depth has been achieved, the water pressure (if jets are used) is reduced and sand infill poured in from ground level around the vibrator, compacting at the base. As more infill is added and compacted the vibrator is gradually removed until the infill has been built up to ground level.
 Related articles on Designing Buildings Wiki
- Driven piles.
- Geothermal pile foundations.
- Ground improvement techniques.
- Grouting in civil engineering.
- Pile foundations.
- Retaining walls.
- Screw piles.
- Soil compaction.
- Types of roller.
 External references
Featured articles and news
RSHP's Terminal 5 named one of world's top airports in 2019.
Do we need a new land classification to spur development?
An architectural technologist in Germany.
3 World Trade Center designed by RSH+P
The struggle to achieve net-zero emissions by 2050.
What is 'agent of change' and who does it protect?
A consistent and measurable approach to home adaptation.
Acknowledging and challenging the realms and interpretations of heritage.
Embodied carbon in construction steel.
A prototype for assessing circularity in buildings.
New Wiki site is set to make BIM mainstream.
FMEA is a step-by-step approach for collecting knowledge about possible points of failure.
The various types and everything else.