Marine, Coastal & River
Defence against water.
Geotube being filled at the shoreline
Geotextile tubes, bags and mattresses for shorelines, riverbanks, piers and pipelines.
Water attacks the toe of a structure, the bed around a pier, and the edge of a bank. The systems in this family put a flexible, heavy layer where the attack is, and let the water through or past without moving the ground beneath.
Geotubes and geo-bags are filled on site from locally available sand. Mattresses cover areas of bed and bank. Concrete Canvas gives a thin concrete lining without formwork.
Geotubes
Large tubes filled with sand or dredged material to form dykes, groynes and revetments.
A geotube is a large tube of woven geotextile, filled hydraulically with sand or dredged material. The fabric holds the fill and lets the water out. Tubes are stacked to make dykes, groynes, revetments and reclamation edges. Fabric strength, tube diameter and filling pressure are chosen together.
Geo-Bags
Sand-filled containers for toe protection and coastal or riverbank defence.
Geo-bags are sand-filled geotextile containers, laid in courses by hand or by machine. They protect the toe of a bank and build revetments and temporary works where stone is expensive or far away. Geotextile durability against UV and abrasion governs the service life.
Concrete Mattress
Linked concrete blocks or fabric formwork that hardens once filled. Protects against scour and shields pipelines and cables.
Fabric formwork is laid on the bed and pumped full of concrete, or concrete blocks are linked into an articulated mat. The mattress covers an area against scour around piers, pipelines and cables, and follows the seabed. It is placed from above or by divers, depending on the site.
Sand Mattress
Sand enclosed in geotextile, a protective or foundation layer beneath pipelines and around piers.
Sand is enclosed in a geotextile envelope to form a flat, continuous mat. The mat gives a protective or foundation layer beneath pipelines and around piers. It is lighter and faster to place than stone and spreads load across the soil beneath.
Geo Mattress
Flexible units that follow the bed or bank to give continuous scour and erosion protection.
Flexible mattress units lie directly on the bed or the bank and follow it. They give continuous cover against scour and erosion. Edges are anchored or keyed in, because most failures start at the edges.
Concrete Canvas
Cement-impregnated fabric that hardens on hydration into a thin, durable, waterproof concrete layer.
Concrete Canvas is a fabric impregnated with dry cement. It is rolled out, wetted and left to harden into a thin concrete shell. No formwork or curing is needed, and it follows irregular banks and uneven ground. It is used for drainage channels, slope lining, culverts, bunds, riverbanks and remedial works.
E6, Concrete Canvas
Concrete performance on a roll.
Cement-impregnated fabric that hardens on hydration into a thin, durable, waterproof concrete layer.
Rapid
Laid and hydrated in hours, no formwork or curing.
Conforming
Follows irregular banks and uneven ground.
Protective
Resists scour in high-flow areas.
Drainage channels, slope lining, culverts, bunds, riverbanks, remedial works.
Where geotubes and geo-bags are used
- Shoreline defence, groynes
- Dykes and reclamation edges
- Riverbank toe protection
Where this family works
Coastal, Ports & Harbours
Shoreline defence, revetments, groynes, reclamation bunds and scour protection.
Rivers, Canals & Irrigation
Bank protection, canal lining, check dams and pier scour protection.
Planning marine, coastal & river works?
Send the plan or section, the soil or rock report and the design loads. We typically respond within one working day.