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- Domaschuk, L., et al.
(författare)
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Creep of frozen sand under isotropic and deviatoric components of stress
- 1985
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Ingår i: Journal of energy resources technology. - : ASME International. - 0195-0738 .- 1528-8994. ; 107:2, s. 199-203
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Tidskriftsartikel (refereegranskat)abstract
- The creep behavior of frozen soil is being studied by examining its response to changes in the mean normal stress and changes in the deviatoric components of stress, using separate tests.^The two response components will then be coupled to provide a model for a general stress state.^The paper contains the results of three triaxial compression creep tests on frozen sand (T=-3 C) in which the samples were subjected to changes in the deviatoric components of stress only. Stepwise stress increases were applied for periods up to 1700 hr during which volumetric and axial strains were measured. The samples underwent attenuating creep when subjected to low stress levels and accelerating creep when subjected to higher stress levels, with no indication of a significantly long period of steady-state creep.The samples underwent volume reduction when the axial strains were attenuating and dilated when the axial strain rates began to accelerate.
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| 7. |
- Knutsson, Sven, et al.
(författare)
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Dams and hydropower plants on permafrost
- 1989
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Ingår i: International Water Power and Dam Construction. - 0306-400X. ; 41, s. 26-35
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Tidskriftsartikel (refereegranskat)
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| 9. |
- Knutsson, Sven
(författare)
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Field study of instrumented gullies and manholes in frost-susceptible soils
- 1982
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Ingår i: Proceedings of the Third International Symposium on Ground Freezing, 22 - 24 June 1982, US Army Corps of Engineers, Cold Regions Research and Engineering Laboratory, Hanover, New Hampshire, USA. - Hanover, NH : Cold regions research and engineering laboratory. ; , s. 367-374
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Konferensbidrag (refereegranskat)abstract
- In Scandinavia, a lot of manholes and gullies, designed for the drainage of rain water, get damaged during winter due to frost action mainly because of the heave of frost susceptible backfill. The concrete rings are pulled apart and the joints between the rings are opened. When thawing starts, water and soil flows into the gullies through the opened joints and the inflowing material prevents the rings from returning to their original positions. In order to study the behavior of manholes and gullies with and without a newly invented rubber sleeve mounted over the joints, a field test was performed during the winter 1980/81 in Lulea, Sweden. The paper describes the instrumentation installed as well as the results obtained
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