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Vibro-compaction
Deep compaction with vibroflot
For vibro-compaction non-cohesive soil is compacted using a vibroflot. The vibroflot is mounted on the lower end of a pipe on a lift crane, duty cycle crawler crane or rig, either free hanging on ropes or via a leader and sunk into the ground. Through the vibration the soil grains change from their initial loose layering to a denser layering. Around the vibrator a cylindrical compacted soil structure is created.
Procedure for vibro-compaction
1. Positioning the vibroflot at the compaction point
2. Penetration of the vibroflot while adding nose jet water, thus pre-compaction of the soil
3. After completion, laying of a levelling layer to transfer load at the surface
4. After reaching the final depth, switching off the nose jet water, adding side jet water and starting vibro-compaction
5. During extraction, staged compaction of the soil while adding fill material from above into the sink crater
Foundation concept
Reinforced cylindrical ground structures are created at the compaction points. These are arranged in various grid patterns and so a systematic compaction of the building ground is achieved.
Vibro-flotation
Thanks to the vibration effect and to its own weight the deep vibroflot penetrates the ground.
Flushing water
In order to support the installation process, jetting water or compressed air emerging from the vibrator tip are added.
Compaction
Extraction of the vibroflot is executed in predetermined hoisting steps and intervals. Thereby the surrounding soil is compacted.
Addition of material
While the soil is compacted step by step, coarse material is filled into the funnel-shaped settlement.
Range of application
Vibrocompaction is intended for compacting loose soil types and artificial fills, so leading to an area-wide improvement of the building ground.