Norwegian Geotechnical Institute (NGI) Digital Archive
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Rock mass characterization on Mars
Get PDFPurpose-built underground space in the form of tunnels and caverns on Mars can mitigate risks to humans and technical infrastructure/equipment posed by cosmic radiation, sandstorms, rapid temperature changes and meteor impacts. This paper explores how rock mass characterization for a tunnel on Mars can be performed using a 3D photogrammetry model built from photos from the Curiosity rover operating in Gale crater. Discontinuity (joint) structures at Chenapau mountain were measured with the open source 3D point cloud and mesh processing software CloudCompare and Q, RMR and GSI values where calculated. Analyses show that unstable wedges might form in the tunnel roof. Reduced stability compared to Earth conditions may result from lower gravity (reduced rock block interlocking) on Mars, and the Q and RMR rock support suggestions might need revising if used for Mars engineering applications.Rock mass characterization on MarspublishedVersio
A Micro Total Analysis System (μTAS) for the In Situ, Real-Time Tracking of Produced Water Discharges through Detection of PAHs and Other Aromatic Compounds
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Deliverable 3.7: Report on field data assessment and sensitivity
No full textIn our last deliverable report (DV3.5) as part of WP3 of SHARP, we discussed experimental results of laboratory triaxial deformation experiments and how coreplugs collected from different reservoir complexes in the North Sea behave mechanically and tied them with timelapse ultrasonic attributes. In this deliverable report, we are focusing on the implication and applicability of those outcome (in DV3.5) to ensure safe disposal of CO2 in a reservoir scale. We try to find out the petrophysical properties of reservoir rocks which influences the degree of velocity change and how those can be incorporated to develop a robust traffic light system to predict and in some cases, forecast stress change in the reservoir during CO2 injection. A crack development model is also proposed by benchmarking stress data with acoustic data during different stages of triaxial experiments, which might have wider applicability beyond CO2 storage applications. Finally, we conducted some novel triaxial tests to emulate CO2 injection in a critically stressed reservoir rock to see how the ultrasonic properties change in due course. We further compared the ultrasonic velocity change with acoustic emission measurements in some tests and found a very strong correlation between them. Insights presented in this deliverable report will directly be useful for developing monitoring strategies for future CCS projects in the North Sea and beyond.publishedVersio
Identification of polar bioactive substances in the Upper Rhine using effect-directed analysis
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Deliverable 5.5 Development of a ground motion model and probabilistic seismic hazard analysis for the North Sea
Get PDFA report summarising North Sea ground motion model development, near surface attenuation, and probabilistic seismic hazard analysis conducted within WP5 (Risk Quantification) of the SHARP project.European CommissionpublishedVersio
Grouping strategies for assessing and managing persistent and mobile substances
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SP CURIOUS – Results from instrumentation and monitoring for the excavation pit at Campus Ullevål
Get PDFCampus Ullevål AS utvikler nytt kontorbygg på Ullevål i Oslo. I den forbindelse er det etablert en opptil 7 m dyp byggegrop i leire. Byggegropen er etablert med spunt og innvendig skråavstiving ned mot en arbeidsplate av betong. Ved ferdig støpt arbeidsplate mot spunt er skråavstiverne demontert, og spunten står utkraget fra arbeidsplatenivå. Det er installert omfattende instrumentering i ett snitt i byggegropen i forbindelse med forskningsprosjektet «Strategisk prosjekt, Campus Ullevål Research and Instrumentation of Underground Structures (SP CURIOUS)». Instrumenteringen omfatter blant annet inklinometerkanaler, både inntil spunt, utenfor spunt og inne i byggegropen; lastceller på skråavstiverne; fiberoptikk på spunten; manuelle innmålinger; samt kontinuerlige målinger på topp spunt med totalstasjon. Grunnarbeidene ble hovedsakelig utført fra vår 2023 til vinter 2024. Data fra instrumenteringen viser god overenstemmelse mellom beregnede og målte deformasjoner og krefter. I denne artikkelen presenteres en beskrivelse og resultater av instrumentering- og overvåkningsprogrammet på Campus Ullevål, med spesielt fokus på deformasjonsforløp under gravefaser. Resultatene sammenliknes også med beregninger utført i prosjekteringsfasen.publishedVersio
