Fugro Alluvial own and operate seabed Piezocone Penetration Testing (PCPT) for use in water depths ranging from nearshore shallow water projects including ports and outfalls through to deepwater cable route projects.

The standard equipment used for the majority of our projects is the modular Roson Unit system. This system has thrust capacities of 2.5 to 10 tonnes, which, depending on frame weight and soil conditions, can push a 10cm2 piezocone to depths in excess of 30m below seabed level. A range of sensors including T bar, Ball probe and in-situ Vane can be utilised from the Roson frame for softer and more sensitive soils. The Roson Unit has water depth capability of 500m.

Where vessel deployment facilities limit the weight of systems, the Seahorse coiled rod system can be offered. The system offers a compact seabed frame, pushing 5cm2 piezocone to a maximum of 15m below seabed. The Seahorse unit has a current water depth rating of 600m, which can be increased upon request.

For deepwater projects including cable route projects we can offer our Deepwater PCPT system which has the capability of pushing a 10cm2 piezocone to 2m below seabed level and taking a 1m Push Sample. This system is currently rated to 2,000m water depth.

Where required CPT/Vibrocore combi rig can be provided to optimise efficiency, and ensure direct comparison between CPT and soils laboratory data.

Fugro Alluvial Offshore Limited provides PCPT services on a variety of different projects including oil and gas pipeline route surveys, rig sites, anchor sites, port and harbour extensions, dredging projects and deepwater cable route surveys.