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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.
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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
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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.
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Vibro-flotation
Thanks to the vibration effect and to its own weight the deep vibroflot penetrates the ground.
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Flushing water
In order to support the installation process, jetting water or compressed air emerging from the vibrator tip are added.
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Compaction
Extraction of the vibroflot is executed in predetermined hoisting steps and intervals. Thereby the surrounding soil is compacted.
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Addition of material
While the soil is compacted step by step, coarse material is filled into the funnel-shaped settlement.
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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.
Machines
Max. lifting capacity - 100 t
100 t
Engine power - 450 kW
450 kW
Max. winch line pull - 2 x 295 kN
2 x 295 kN
Max. main boom - 59.00 m
59.00 m
Max. lifting capacity - 70 t
70 t
Engine power - 320 kW
320 kW
Max. winch line pull - 2 x 200 kN
2 x 200 kN
Max. main boom - 50.00 m
50.00 m