Torpedo shaped anchors may be the next cost-effective and robust anchor solution for offshore floating structures.
BIFURC is an NGI general purpose finite element program for geomechanical analysis.
Creep behaviour of soft clay
In spite of the well known problem related to time dependent settlements of soft clay, there are no commonly accepted methods for calculation of these settlements.
Cyclic stress-strain modelling of clay
A constitutive model for cyclic and average loading in plane-strain condition is developed. The main input to the model are stress-strain contour diagrams.
Calculated characteristic stress paths for a hypothetical bearing capacity problem where the cyclic load component is equal to the average load component (Vcy = Va)
Contour diagrams of relationships between average shear strain, cyclic...
Database for slides and avalanches
Experts from Norwegian Geological Survey, NGI and The Norwegian Public Roads Administration have established a central and common Norwegian database for slides and avalanches.
The initial National database for slides consisted of slide incidents collected and systemized by the local historian Astor Furseth. Now 28.000 new slide incidents are integrated in the database. Information on the "new"...
Deep water disposal site, Oslo Harbour
NGI's role in the project "Clean Oslo fjord" is to ensure that the deposition of contaminated sediments from Oslo Harbour to the deep water waste disposal site at Malmøykalven fulfills the concession requirements established by the Norwegian Pollution Control Authority (SFT).
The contamination of sediments in the Oslo harbour is mainly accumulated on the sea bed at shallow waters. This...
Discrete Element Method (DEM)
The Discrete Element Method (DEM) is a numerical method used to compute the stresses and displacements in a volume containing a large number of particles such as grains of sand.
Full scale avalanche test
At NGI's field laboratory for avalanche research, experts can closely examine and study avalanches in its natural environment and in full scale.
Ground Penetrating Radar
At NGI there has been a continuos activity in developing and testing radars for different subsurface mapping tasks since 1989. The work has included development of hardware and software for data acquisition and algorithms for data processing and interpretation.
In parallel with the development work, NGI has carried out more than hundred service jobs, gaining a lot of practical experience. The...
Highway crossing for Oslo harbour
Construction work for the E18 crossing of the Bjørvika in Oslo harbour started in 2005 and is planned for completion in 2010. NGI has worked on this project for the Norwegian Public Roads Administration since 1995.
It is raining good quality drinking water
According to a 2008 survey in Norway, the water purifying facilities of Øvre Årdal municipality produce the best quality drinking water from an underground water source in Norway.
Monitoring and modelling of the Åknes
The Åknes/Tafjord project was initiated in 2004 to examine, monitor and enable a system that would give an early warning if a massive rock slide was to occur from the open crack at Åknes, 900 m above the narrow fjord.
New remediation methods
Water and the marine environment in Norwegian harbours are often of poor quality because the sediments are contaminated. New approaches can transform the contaminated sediments to attractive shore properties.
NGI is a leading international centre for research and consulting in the geosciences. In particular, NGI's laboratory is internationally respected for high quality testing combined with high capacity and creative problem solving in collaboration with the client. In addition to experience with soft and sensitive Scandinavian clays, the laboratory has over the past decades developed equipment and...
Offshore Pipeline and Riser Model Testing
NGI has over 10 years of experience with large-scale model testing that investigate the complex interaction between seabed soils and risers or pipelines. Such model tests are of particular importance for projects in deepwater where seabed soils are commonly very soft clays, for which the characterisation of such soils using standard in situ and laboratory testing is difficult.
Overview of test...
Offshore Wind Energy
In the last 40 years NGI has through the oil and gas industry gained a wide range of expertise in offshore geotechnics.
Optical fibres safeguard bridge
The five optical fibres attached to the underside of the almost 70 year old Göta River Bridge in Gothenburg are both thin and fragile, but they are used to confirm the safe use of the bridge and to extend its life with ten to fifteen years.
Photo: Stig Hedström, Swedeish road and Highway Administration (Vägverket)
The fibres are used to measure the load from the daily traffic and to detect...
Ormen Lange and the Storegga slide
NGI¿s contribution to the Ormen Lange project has been to ensure that no such gigantic landslide is about to occur again.
The study has shown, that a significant speedup can be achieved when a finite element simulation is distributed over several computer cores. However, it depends on many parameters such as the discretisation of the problem, hardware configuration and employed software, to mention but a view. In order to study the different influencing parameters in detail, a 2d and a 3d boundary value problem...
The Q-method is a numerical description of the rock mass quality with respect to rock stability.
SiteController - remote monitoring systems
for field measurements with automated data collection and presentation of results
Automatic collection of Remote Geotechnical, Structural and Environmental data
Automatic Early Warning as SMS and/or local sound and/or light Alarm
Remote configuration and set-up
Low Power - Suitable for battery and solar cell operation
8 High-end on-board Analogue sensor inputs
6 High-end Frequency inputs...
Skirted Caisson Foundations for Offshore Structures
NGI has over 35 years of experience with the design and installation of skirted caisson foundations for offshore structures. These foundations were first used with Gravity Base Structures (GBSs).
Stability of contaminated sediments
The research program focused on advancing the state of knowledge on physical and chemical sediment stability, the understanding and prediction of contaminant transport, and the design of long term containment methods.
Suction anchor installation
Suction anchor installation services from NGI - FRAMO, References
Suction anchors for FPSO at Shelley Field
NGI was geotechnical consultant to Sevan Marine and the client Oilexco for the design and installation of suction anchors for the novel cylindrical FPSO at the Shelley Field in the UK Sector of the North Sea.
The Nykirke railroad crossing
The Nykirke railroad crossing (1, 5km) is a part of a project to modernize the railroad in Vestfold county, Norway. The project was implemented as a total enterprise after a target price contract with incitement.
The Risk of Tsunamis in Southeast Asia
As a consequence of the earthquake and tsunami disaster in the Indian Ocean in Southeast Asia on the 26th of December 2004, NGI initiated and implemented a study of tsunami risks for the government of Thailand in 2005.
More than 250 000 people were killed when a very strong earthquake triggered a tsunami in the Indian Ocean in Southeast Asia on the 26th of December 2004. The tsunami also caused...
The Shah Deniz platform, Caspian Sea
NGI was geotechnical advisor for the conversion of a jack-up drilling platform to a permanent installation in the Shah Deniz oil field in the Caspian Sea, prior to the platform installation in April 2006.
The Stad Ship tunnel, Norway
The west coast of Norway is rough for the sea traffic. To reduce to amount of boats that sinks the Coastal development looks at the possibility to built a tunnel for ships to shortening the travel time but also to reduce the amount of sinking ships.
Triaxial testing at NGI
The triaxial test is the most basic and most used laboratory test in geotechnical engineering. Also at NGI the triaxial test has been the cornerstone test since NGI was established in 1953.
Windfarms offshore Germany
NGI has participated in the development of offshore windfarms at Alpha Ventus at Borkum, northwest of Germany. This is Germany's first offshore windfarm.