A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Frost heave and water uptake rates in silty soil subject to variable water table height during freezing
AbstractGiven a frost-susceptible soil and a sufficiently cold environment, the availability of water is the most influential factor controlling frost heave in pavement structures. In particular, the depth of the water table below the freezing front determines to a large degree the availability of new water that can be imbibed by freezing pavement layers. This research investigated the effect of water table height on the laboratory frost heave behavior of an undisturbed silty soil typical of frost-susceptible pavement subgrades within the jurisdiction of the Swedish National Road Administration. The tested specimen was 590 mm in height, and the water table was varied between 150 and 300 mm above the bottom of the specimen. A test was also conducted in the absence of a water table. The frost penetration rate was maintained at 1.1 mm/hr throughout the testing to facilitate a similar rate of heat extraction for each frost heave test, and the same depth section of the specimen was analyzed for each test. The test results show consistent and measurable reductions in frost heave and water uptake rates with decreasing water table height. However, the frost heave rate declined more slowly than the water uptake rate, leading to increasing ratios of volumetric frost heave to volumetric water uptake. This observation is explained by the intrusion of increasing amounts of air into the frozen zone during tests utilizing lower water tables.
Frost heave and water uptake rates in silty soil subject to variable water table height during freezing
AbstractGiven a frost-susceptible soil and a sufficiently cold environment, the availability of water is the most influential factor controlling frost heave in pavement structures. In particular, the depth of the water table below the freezing front determines to a large degree the availability of new water that can be imbibed by freezing pavement layers. This research investigated the effect of water table height on the laboratory frost heave behavior of an undisturbed silty soil typical of frost-susceptible pavement subgrades within the jurisdiction of the Swedish National Road Administration. The tested specimen was 590 mm in height, and the water table was varied between 150 and 300 mm above the bottom of the specimen. A test was also conducted in the absence of a water table. The frost penetration rate was maintained at 1.1 mm/hr throughout the testing to facilitate a similar rate of heat extraction for each frost heave test, and the same depth section of the specimen was analyzed for each test. The test results show consistent and measurable reductions in frost heave and water uptake rates with decreasing water table height. However, the frost heave rate declined more slowly than the water uptake rate, leading to increasing ratios of volumetric frost heave to volumetric water uptake. This observation is explained by the intrusion of increasing amounts of air into the frozen zone during tests utilizing lower water tables.
Frost heave and water uptake rates in silty soil subject to variable water table height during freezing
Hermansson, Åke (author) / Spencer Guthrie, W. (author)
Cold Regions, Science and Technology ; 43 ; 128-139
2005-03-03
12 pages
Article (Journal)
Electronic Resource
English
Study on the frost heave behavior of the freezing unsaturated silty clay
| Elsevier | 2022
Modeling frost heave in freezing soils
| Online Contents | 2010
Modeling frost heave in freezing soils
| Elsevier | 2009
Separate-ice frost heave model for one-dimensional soil freezing process
| Springer Verlag | 2017