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Wassara (right image) minimises the risk of pressurising the formation

Foundation work and ground engineering with Wassara


Minimal impact on ground water table

 Urban areas are often considered as sensitive and must not be affected by side effects from a drilling operation. This means that no impact is allowed on the ground water level, or any injection of oil or air to the formation.

No risk of harming buildings

When drilling with Wassara, the risk of pressurising the formation is minimised as the water quickly lose pressure when leaving the hammer. When drilling with air-powered equipment, there is always a risk of pressurising the formation. If the formation is filled with cracks or cavities, the expanding air may cause hazard to adjacent structures.

Better work environment

 Air-powered drilling in urban areas often face environmental restrictions in terms of allowed noise level and injection of oil or dust to the air. Wassaras water-powered drilling gives no injection of oil or dust in the formation, and is far quieter than top hammers since the percussion takes place down in the borehole.


Example of successful projects:

Water-powered drilling indoors, next to 200 000 commuters

The Stockholm Central station has been sinking 1 mm per year and needed reinforcement of the foundation. This was done by drilling and setting casing all the way down to the bedrock.

Read the full version here!

Water-powered drilling in reinforcement of Pyramiden

The neighborhood "Pyramiden" in central Stockholm was sinking due to old wooden piles. Wassara's technology turned out to be the most suitable and is now the only method in use.

Read the full version here!