Norwegian Geotechnical Institute (NGI) Digital Archive
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Deliverable 3.1 Rheology data overview for study sites
No full textA survey of existing rheological databases and scientific and industry literature and reports will yield a comprehensive database of the rheological behaviour of North Sea relevant lithologies with the aim to establish regional trends and correlations that maximise the quantification of rheology for CCS site-specific applications. This report details the availability (albeit rather limited) of geomechanical properties of the relevant lithologies determined both from rock deformation experiments (static properties) and derived from openhole wireline logging recordings of the p-wave and s-wave velocities as well as densities (dynamic properties).European CommissionpublishedVersio
Stability of Natural Slopes in Quick Clay
Get PDFNorway and Sweden have been subjected to landslides for several centuries, with some of the largest landslides involving a large block sliding out as a continuous flake on a deposit of soft quick clay. Attempts to calculate the stability conditions for this type of landslides by using a conventional effective stress analysis have shown to considerably overestimate the safety factor. The introduction of the concept of limiting or yielding stresses in the course of the last 3 to 5 decades resulted in the general acceptance that stability calculations, even for natural slopes, should be based on undrained shear strength. Early in the seventies the ADP-type of analysis was proposed (Bjerrum, 1973; Ladd and Foott, 1974), based on triaxial and direct simple shear tests on tests specimens reconsolidated to in situ stresses, and thus simulating the stress conditions along different parts of the failure surface. The present study describes recently developed relations between undrained shear strength parameters and effective shear strength parameters, friction and attraction. The new relationships make it possible to do an effective stress analysis, and thus take existing pore pressures into consideration in a better way than in an ADP-type analyses. These effective stress-strength parameters have been determined for several Norwegian and Swedish clays, and used for a recalculation of some of the older Scandinavian flake type landslides
Realistic visualization of debris flow type landslides through virtual reality
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The NORMAN Suspect List Exchange (NORMAN-SLE): facilitating European and worldwide collaboration on suspect screening in high resolution mass spectrometry
Get PDFBackground The NORMAN Association (https://www.norman-network.com/) initiated the NORMAN Suspect List Exchange (NORMAN-SLE; https://www.norman-network.com/nds/SLE/) in 2015, following the NORMAN collaborative trial on non-target screening of environmental water samples by mass spectrometry. Since then, this exchange of information on chemicals that are expected to occur in the environment, along with the accompanying expert knowledge and references, has become a valuable knowledge base for “suspect screening” lists. The NORMAN-SLE now serves as a FAIR (Findable, Accessible, Interoperable, Reusable) chemical information resource worldwide. Results The NORMAN-SLE contains 99 separate suspect list collections (as of May 2022) from over 70 contributors around the world, totalling over 100,000 unique substances. The substance classes include per- and polyfluoroalkyl substances (PFAS), pharmaceuticals, pesticides, natural toxins, high production volume substances covered under the European REACH regulation (EC: 1272/2008), priority contaminants of emerging concern (CECs) and regulatory lists from NORMAN partners. Several lists focus on transformation products (TPs) and complex features detected in the environment with various levels of provenance and structural information. Each list is available for separate download. The merged, curated collection is also available as the NORMAN Substance Database (NORMAN SusDat). Both the NORMAN-SLE and NORMAN SusDat are integrated within the NORMAN Database System (NDS). The individual NORMAN-SLE lists receive digital object identifiers (DOIs) and traceable versioning via a Zenodo community (https://zenodo.org/communities/norman-sle), with a total of > 40,000 unique views, > 50,000 unique downloads and 40 citations (May 2022). NORMAN-SLE content is progressively integrated into large open chemical databases such as PubChem (https://pubchem.ncbi.nlm.nih.gov/) and the US EPA’s CompTox Chemicals Dashboard (https://comptox.epa.gov/dashboard/), enabling further access to these lists, along with the additional functionality and calculated properties these resources offer. PubChem has also integrated significant annotation content from the NORMAN-SLE, including a classification browser (https://pubchem.ncbi.nlm.nih.gov/classification/#hid=101). Conclusions The NORMAN-SLE offers a specialized service for hosting suspect screening lists of relevance for the environmental community in an open, FAIR manner that allows integration with other major chemical resources. These efforts foster the exchange of information between scientists and regulators, supporting the paradigm shift to the “one substance, one assessment” approach. New submissions are welcome via the contacts provided on the NORMAN-SLE website (https://www.norman-network.com/nds/SLE/).The NORMAN Suspect List Exchange (NORMAN-SLE): facilitating European and worldwide collaboration on suspect screening in high resolution mass spectrometrypublishedVersio
The Hydroacoustic Network of the CTBT International Monitoring System: Access and Exploitation
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Cyclic stress–dilatancy relations and plastic flow potentials for soils based on hypothesis of complementarity of stress–dilatancy conjugates
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Lime-cement stabilisation of Trondheim clays and its impact on carbon dioxide emissions
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