Vertical drains
Vertical or Wick Drains

Prefabricated vertical drains (PVDs) or Wick drains are applied in areas where loose, compressible, water-saturated soils make the soil unstable.

Underwater Placement in Bulk of Fill Material
Underwater Placement in Bulk of Fill Material

Underwater placement of fill is usually performed by trailing suction hopper dredgers and barges by opening their bottom doors or by split hull vessels.

Subsea Rock Installation
Subsea Rock Installation

Subsea rock installation is a technique used for rock placement to protect marine infrastructure, especially for offshore oil, gas and wind energy projects.

Soil Improvement
Soil Improvement

Soil improvement is applied to both consolidate existing loose subsoils and sometimes specifically for compaction of newly reclaimed soil.

Hydraulic Fill
Hydraulic Fill

Hydraulic fill is material that is dredged from a borrow area or other area and placed at a site to raise the level of the land or build new land.

Land Reclamation
Land Reclamation

Land reclamation is the process of creating new land by raising the elevation of a waterbed or low-lying land or by pumping water out of muddy morass areas.

Rainbowing
Rainbowing

Rainbowing is a method by which trailing suction hopper dredgers place material in shallow areas by pumping into the air through a hose with a nozzle.

Ground Improvement
Ground Improvement

Ground improvement techniques are used when the behaviour of the fill mass and/or the underlying soil does not meet required design criteria.