Geotechnical Survey Services - Vibrocoring
EMU’s variable frequency high power vibrocore systems have been developed to cope with the wide range of sediment types found in marine environments. They can return an undisturbed core of up to three or six metres long and 84mm in diameter.
The EMU vibrocorer can fulfil the demand for maximum recovery in extreme seabed conditions such as dense granular materials and stiff clays. By controlling the energy delivery and frequency of thrust it is also capable of gently penetrating soft sediments leaving them in a less disturbed state than other systems. The piston within the liner maximises the returned sample and helps to maintain its integrity, even with deep water sampling of loosely consolidated samples. The high specification electronic variable frequency manager will control the vibrocore, to increase its ability to maximise penetration of the seabed, but at the same time keep the sample disturbance to a minimum.
This system has been proved time after time for many clients including construction, ports and harbours, CEFAS, aggregates and renewables.
Typical applications:
- Pipeline route surveys
- Cable route surveys
- Geochemical sampling surveys
- Site assessment surveys
- Site investigations
- Marine chemistry
- Pre-dredge geotechnical surveys
- Mineral exploration
- Shallow penetration sampling
- Calibration of surficial geophysical data
Vibrocore Logging and Testing
EMU provides vibrocore logging and testing services for a wide range of clients. Detailed visual descriptions of vibrocores are conducted by EMU’s highly qualified and experienced marine geologists and sedimentologists.
All of our vibrocore logging and testing reports include:
- Site location maps
- Laboratory analysis summaries
- Vibrocore logging and testing methodologies
- Detailed visual descriptions and customised vibrocore logs
- High resolution colour-balanced photographs (in digital and hard copy formats)
- PSD cumulative frequency curves, including recalculated curves for sands and gravels
Vibrocore logging procedures are in accordance with BS5930: 1999 standards. EMU’s sediment testing laboratory is UKAS-accredited.