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Advanced in-situ an...
Advanced in-situ and laboratory characterisation of the ALPACA chalk research site
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- Vinck, Ken (författare)
- Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom,Imperial College of Science, Technology and Medicine
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- Liu, Tingfa (författare)
- Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom,Imperial College of Science, Technology and Medicine
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- Jardine, Richard J. (författare)
- Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom,Imperial College of Science, Technology and Medicine
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visa fler...
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- Kontoe, Stavroula (författare)
- Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom,Imperial College of Science, Technology and Medicine
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- Ahmadi-Naghadeh, Reza (författare)
- Jönköping University,JTH, Byggnadsteknik och belysningsvetenskap,Imperial College of Science, Technology and Medicine
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- Buckley, Róisín M. (författare)
- School of Engineering, Oakfield Ave, Glasgow, United Kingdom,University of Glasgow
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- Byrne, Byron W. (författare)
- Department of Engineering Science, Oxford University, Oxford, United Kingdom,University Of Oxford
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- Lawrence, James A. (författare)
- Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
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- McAdam, Ross A. (författare)
- Department of Engineering Science, Oxford University, Oxford, United Kingdom
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- Schranz, Fabian (författare)
- Department of Engineering Science, Oxford University, Oxford, United Kingdom
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visa färre...
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Ingår i: Geotechnique. - : ICE Publishing. - 0016-8505 .- 1751-7656.
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Low-to-medium density chalk at St Nicholas at Wade, UK, is characterised by intensive testing to inform the interpretation of axial and lateral tests on driven piles. The chalk de-structures when taken to large strains, especially under dynamic loading, leading to remarkably high pore pressures beneath penetrating CPT and driven pile tips, weak putty annuli around their shafts and degraded responses in full-displacement pressuremeter tests. Laboratory tests on carefully formed specimens explore the chalk’s unstable structure and markedly time and rate-dependent mechanical behaviour. A clear hierarchy is found between profiles of peak strength with depth of Brazilian tension (BT), drained and undrained triaxial and direct simple shear (DSS) tests conducted from in-situ stress conditions. Highly instrumented triaxial tests reveal the chalk’s unusual effective stress paths, markedly brittle failure behaviour from small strains and the effects of consolidating to higher than in-situ stresses. The chalk’s mainly sub-vertical jointing and micro-fissuring leads to properties depending on specimen scale, with in-situ mass stiffnesses falling significantly below high-quality laboratory measurements and vertical Young’s moduli exceeding horizontal stiffnesses. While compressive strength and stiffness appear relatively insensitive to effective stress levels, consolidation to higher pressures closes micro-fissures, increases stiffness and reduces anisotropy.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Geotechnical Engineering (hsv//eng)
Nyckelord
- chalk
- full-scale pile testing
- in situ testing
- laboratory testing
- piles & piling
- site investigation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Vinck, Ken
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Liu, Tingfa
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Jardine, Richard ...
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Kontoe, Stavroul ...
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Ahmadi-Naghadeh, ...
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Buckley, Róisín ...
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visa fler...
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Byrne, Byron W.
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Lawrence, James ...
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McAdam, Ross A.
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Schranz, Fabian
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Jönköping University
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