Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes
The bearing capacity of frozen soils is high, compared to non-frozen soils of same composition. Projected climatic warming in the Arctic will increase the soil temperature, thus affecting the bearing capacity and the deformation properties. Western Greenland temperatures are projected to increase by...
Published in: | Cold Regions Engineering 2012 |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Society of Civil Engineers
2012
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 https://doi.org/10.1061/9780784412473.009 |
id |
ftdtupubl:oai:pure.atira.dk:publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 2024-06-23T07:50:42+00:00 Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes Agergaard, Frederik Ancker Ingeman-Nielsen, Thomas 2012 https://orbit.dtu.dk/en/publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 https://doi.org/10.1061/9780784412473.009 eng eng American Society of Civil Engineers https://orbit.dtu.dk/en/publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 urn:ISBN:9780784412473 info:eu-repo/semantics/closedAccess Agergaard , F A & Ingeman-Nielsen , T 2012 , Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes . in Cold Regions Engineering 2012 : Sustainable Infrastructure Development in a Changing Cold Environment . American Society of Civil Engineers , pp. 82-92 , Fifteenth International Specialty Conference on Cold Regions Engineering , Quebec City , Canada , 19/08/2012 . https://doi.org/10.1061/9780784412473.009 Permafrost Triaxial testing Silty clay Unfrozen water content climate change /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action contributionToPeriodical 2012 ftdtupubl https://doi.org/10.1061/9780784412473.009 2024-06-04T14:58:11Z The bearing capacity of frozen soils is high, compared to non-frozen soils of same composition. Projected climatic warming in the Arctic will increase the soil temperature, thus affecting the bearing capacity and the deformation properties. Western Greenland temperatures are projected to increase by 2-3 °C during the 21st century. This paper presents a relation between undrained shear strength and temperature based on a series triaxial tests of fine-grained permafrost in the interval from -3 °C to -1 °C. Moderately ice-rich permafrost and excess ice free refrozen active-layer were retrieved from the Western Greenland towns of Sisimiut and Ilulissat respectively. Tests reveal undrained shear strengths ranging from 409 kPa to 940 kPa, where low temperatures and low excess ice content yield higher strengths. Normalized strengths are used for establishing a trend for the strength decrease with increasing temperature. Both excess ice free and moderately ice-rich samples show a strength decrease of 21 %/°C from -3 °C to -1 °C. Other authors’ data suggest the same trend for moderately ice-rich samples, whereas it is suggested that further studies are conducted to validate the trend for excess ice free samples. Unfrozen water contents are seen to be directly inversely proportional to the undrained shear strength when both are normalized, which may reduce costs for establishing reliable soil strength parameters. It is suggested that a relation to deformation parameters are investigated as well. The established trends could provide a valuable tool for foundation design in fine-grained permafrost areas. Article in Journal/Newspaper Arctic Climate change Greenland Ice Ilulissat permafrost Sisimiut Technical University of Denmark: DTU Orbit Arctic Greenland Ilulissat ENVELOPE(-51.099,-51.099,69.220,69.220) Sisimiut ENVELOPE(-53.674,-53.674,66.939,66.939) Cold Regions Engineering 2012 82 92 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Permafrost Triaxial testing Silty clay Unfrozen water content climate change /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Permafrost Triaxial testing Silty clay Unfrozen water content climate change /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Agergaard, Frederik Ancker Ingeman-Nielsen, Thomas Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
topic_facet |
Permafrost Triaxial testing Silty clay Unfrozen water content climate change /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
The bearing capacity of frozen soils is high, compared to non-frozen soils of same composition. Projected climatic warming in the Arctic will increase the soil temperature, thus affecting the bearing capacity and the deformation properties. Western Greenland temperatures are projected to increase by 2-3 °C during the 21st century. This paper presents a relation between undrained shear strength and temperature based on a series triaxial tests of fine-grained permafrost in the interval from -3 °C to -1 °C. Moderately ice-rich permafrost and excess ice free refrozen active-layer were retrieved from the Western Greenland towns of Sisimiut and Ilulissat respectively. Tests reveal undrained shear strengths ranging from 409 kPa to 940 kPa, where low temperatures and low excess ice content yield higher strengths. Normalized strengths are used for establishing a trend for the strength decrease with increasing temperature. Both excess ice free and moderately ice-rich samples show a strength decrease of 21 %/°C from -3 °C to -1 °C. Other authors’ data suggest the same trend for moderately ice-rich samples, whereas it is suggested that further studies are conducted to validate the trend for excess ice free samples. Unfrozen water contents are seen to be directly inversely proportional to the undrained shear strength when both are normalized, which may reduce costs for establishing reliable soil strength parameters. It is suggested that a relation to deformation parameters are investigated as well. The established trends could provide a valuable tool for foundation design in fine-grained permafrost areas. |
format |
Article in Journal/Newspaper |
author |
Agergaard, Frederik Ancker Ingeman-Nielsen, Thomas |
author_facet |
Agergaard, Frederik Ancker Ingeman-Nielsen, Thomas |
author_sort |
Agergaard, Frederik Ancker |
title |
Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
title_short |
Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
title_full |
Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
title_fullStr |
Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
title_full_unstemmed |
Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
title_sort |
development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes |
publisher |
American Society of Civil Engineers |
publishDate |
2012 |
url |
https://orbit.dtu.dk/en/publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 https://doi.org/10.1061/9780784412473.009 |
long_lat |
ENVELOPE(-51.099,-51.099,69.220,69.220) ENVELOPE(-53.674,-53.674,66.939,66.939) |
geographic |
Arctic Greenland Ilulissat Sisimiut |
geographic_facet |
Arctic Greenland Ilulissat Sisimiut |
genre |
Arctic Climate change Greenland Ice Ilulissat permafrost Sisimiut |
genre_facet |
Arctic Climate change Greenland Ice Ilulissat permafrost Sisimiut |
op_source |
Agergaard , F A & Ingeman-Nielsen , T 2012 , Development of bearing capacity of fine grained permafrost deposits in western greenland urban areas subject to soil temperature changes . in Cold Regions Engineering 2012 : Sustainable Infrastructure Development in a Changing Cold Environment . American Society of Civil Engineers , pp. 82-92 , Fifteenth International Specialty Conference on Cold Regions Engineering , Quebec City , Canada , 19/08/2012 . https://doi.org/10.1061/9780784412473.009 |
op_relation |
https://orbit.dtu.dk/en/publications/7bd248e1-5aa4-4d4e-9bb4-28d9432fc782 urn:ISBN:9780784412473 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1061/9780784412473.009 |
container_title |
Cold Regions Engineering 2012 |
container_start_page |
82 |
op_container_end_page |
92 |
_version_ |
1802641610517774336 |