Vibratory tamping and vibratory compaction

Effective soil improvement through vibratory tamping and vibratory compaction

We use vibro-compaction and vibro-pressure compaction when the existing soil is not strong enough for low surface loads and soil improvement is required. Vibro compaction allows us to compact loose, non-cohesive soils or soils that are too inhomogeneous rapidly, economically and reliably. If the soil is predominantly cohesive, the vibratory tamping method must be used, which produces more columnar load-bearing elements.

Implementation

In vibratory tamping compaction, the vibrator is vibrated into the subsoil with the support of air or water and air. The resulting cavity is filled by adding installation material, which is radially displaced and compacted by a continuous tamping movement. In vibro-compaction, the vibrator is inserted with flushing support. After adding the installation material to the surface, a compaction zone of two to four metres in diameter is achieved by gradual pulling. Due to the reduction in pore volume, a settlement funnel forms on the surface, which is then backfilled with fill material.

Examinations

Pile driving or pressure probing
Plate load test

Applications

Vibratory tamping compaction

In mixed-grained soils such as sandy silt and cohesive soils with undrained shear strength of 20 to 80 kN/mÇ
Light to medium building loads

Vibration pressure compaction

In non-cohesive to slightly cohesive soils such as sand and gravel
High loads on the improved subsoil possible, very low settlement and particularly economical in water-saturated soils below the groundwater table