Subsoils
Subsoils

Subsoils are found immediately under the surface soils and cover a wide variety of properties and show very different behaviours.

Subsoil Improvement Works at DVIZ, Haiphong, Vietnam
Subsoil Improvement Works at DVIZ, Haiphong, Vietnam

As Vietnam seeks a balance between preserving land for agriculture and finding space for industry, creating new land is one solution. But waiting for subsoil to settle naturally at reclamation sites is time-consuming and costly.

Reclamation on Soft Subsoil by Spraying Thin Layers of Sand: The "IJburg" Project near Amsterdam
Reclamation on Soft Subsoil by Spraying Thin Layers of Sand: The “IJburg” Project near Amsterdam

The question is: How do you create a stable platform when reclaiming sand on a very soft subsoil? Removing the subsoil or placing large amounts of geo-textiles are costly. The answer is: A new method using a custom-built spray pontoon which has proven efficient and economically viable.