Soil improvement – Improving difficult subsoil

An increasing number of buildings are being constructed in areas with particularly difficult subsoil conditions. The methods we implement for soil improvement minimize settlements, increase the load-bearing capacity of the subsoil and ensure the stability of slopes. After all, we are specialists for challenging projects, and by using suitable methods we make sure that every construction project is future-proof. 

Vibro Compaction (VC)

Non-cohesive and low-cohesive soils such as sand or gravel often have insufficient bulk density. To make the existing soil more compact, it is floated by flushing with water or air. Gradually removing the silo vibrator creates a densified zone with a diameter of roughly 2 to 4 m. 

Dynamic Compaction

To improve the packing density of non-cohesive soils, a weight is repeatedly dropped from a great height. The kinetic energy emitted on impact compacts the soil via forced re-packing of the grains. The compression ratio depends on the soil properties, the size of the falling weight and the drop height and the spacing between the compaction points.

Vibration Replacement (VR) / Dry Vibro Concrete Columns (DVCC)

In cohesive soils, the load-bearing capacity is enhanced using VR or DVCC. With these methods, non-cohesive material is drawn to the vibrator tip, where it is compacted into the soil in multiple vibration stages. While VR involves the construction of columns from ballast, gravel and/or sand, moist concrete is used for DVCC.

 

Vibro Concrete Columns (VCC)

For predominantly cohesive to organic soils with particularly low stability, vibro concrete columns with a high strength are constructed. These have similar properties to unreinforced piles, which serve to discharge structural loads into the deeper subsoil. 

Vibro Textile Columns (VTC)

In very soft, cohesive soils which do not offer sufficient lateral support, vibro textile columns are encased with a geotextile sheath. This provides the necessary lateral support for the installation material such as gravel or sand. 

New construction E2, Eschenlohe, Germany
For the new B2 bypass, a total of 6,200 m of vibro textile columns were constructed.

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Do you have any questions?

Then get in touch with us. 

BAUER Spezialtiefbau GmbH
Head office
bst@bauer.de
+49 8252 97-0

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