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Frost-Induced Heaving of Soil around a Culvert
A good portion of silty soils and clays are characterized by susceptibility to frost heaving. This phenomenon needs to be considered in seasonally freezing environments. The issue, however, is also encountered in artificial freezing (for construction purposes) and in pipeline operations where the medium transported may have below-freezing temperature and the surrounding soil is above freezing, or viceversa. Accounting for frost heave is important in transportation infrastructure, and of particular concern are the regions in soils where thermal boundary conditions make it possible for the freezing front to propagate into the soil at different rates, leading to differential frost heave. A constitutive model for frost heaving will be implemented in the finite element analysis, and boundary value problems will be simulated to reveal the behavior of soil during freezing in the neighborhood of a culverts passing below a road. An interesting outcome was found: the road above the culvert may experience a "bump" in the first few weeks of freezing, but later the frost heave directly above the culvert may slow down, leading to a "depression" in the surface above the culvert. The occurrence of a bump due to frost heave is a known phenomenon, but the likelihood of a depression is, so far, hypothetical.
Frost-Induced Heaving of Soil around a Culvert
A good portion of silty soils and clays are characterized by susceptibility to frost heaving. This phenomenon needs to be considered in seasonally freezing environments. The issue, however, is also encountered in artificial freezing (for construction purposes) and in pipeline operations where the medium transported may have below-freezing temperature and the surrounding soil is above freezing, or viceversa. Accounting for frost heave is important in transportation infrastructure, and of particular concern are the regions in soils where thermal boundary conditions make it possible for the freezing front to propagate into the soil at different rates, leading to differential frost heave. A constitutive model for frost heaving will be implemented in the finite element analysis, and boundary value problems will be simulated to reveal the behavior of soil during freezing in the neighborhood of a culverts passing below a road. An interesting outcome was found: the road above the culvert may experience a "bump" in the first few weeks of freezing, but later the frost heave directly above the culvert may slow down, leading to a "depression" in the surface above the culvert. The occurrence of a bump due to frost heave is a known phenomenon, but the likelihood of a depression is, so far, hypothetical.
Frost-Induced Heaving of Soil around a Culvert
Zhang, Yao (author) / Michalowski, Radoslaw L. (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 4456-4465
2012-03-29
Conference paper
Electronic Resource
English
Frost-Induced Heaving of Soil around a Culvert
| British Library Conference Proceedings | 2012
| Engineering Index Backfile | 1965
| Engineering Index Backfile | 1932