Vibro Techniques

Deep vibro techniques present flexible solutions for ground improvement. They are mainly used under foundations of structures that are to be constructed on soils of low bearing capacity. Keller developed the depth vibrator (patented in 1934), which was originally used to compact granular soils such as sand and gravel. Today Keller improves a variety of granular and cohesive soils employing a wide range of depth vibrator models and techniques.

Vibro Compaction

A site improvement technique for granular material, Vibro Compaction uses company-designed probe-type vibrators to densify soils to depths of up to 120 feet. Vibro Compaction increases bearing capacity for shallow-footing construction, reduces settlements and also mitigates liquefaction potential in seismic areas.

Method Animation

Vibro Replacement

Very weak, cohesive and organic soils that are not suitable for standard Vibro techniques can be improved by the installation of Vibro Replacement. Beneath large area loads, Vibro Replacement reduces settlement, increases bearing capacity and slope stability.

Method Animation

Deep Soil Mixing (dry)

Improvement of weak soils by the DSM method. Basically there are two different mixing methods, dry and wet. Dry Soil Mixing is the in situ mechanical blending of wet soil with dry cementitious materials (binder) to achieve improved engineering properties, such as strength and stiffness.


Dynamic Compaction

Dynamic compaction is a ground improvement technique that densifies soils and fills by using a drop weight. The drop weight, typically hardened steel plates, is lifted by a crane and repeatedly dropped on the ground surface. The technique has been used to increase bearing capacity, and decrease settlement and liquefaction potential for planned structures.

Deep Soil Mixing (wet)

Improvement of weak soils by the DSM method. Basically there are two different mixing methods, dry and wet. Wet Soil Mixing is the mechanical blending of in situ soil with slurry grout using a soil mixing tool. Mixing creates mass or a cement column (soilcrete®), used for soil stabilization, as earth support, or as foundation support.

Method Animation


Vertical Drains

Vertical drains are applied for ground improvement in order to consolidate soft ground. They are suitable for very soft and soft soils with a high water content.

Method Animation


Video – Vibro Techniques

In this video the process of the Vibro Replacement method is shown in detail, which is executed by Keller Poland.