Engineering Applications in Permafrost Areas 487 Frost heave forces on embedded structural units
Large-scale model studies of frost heave forces acting on horizontal, vertical, and inclined members embedded in a silt were carried out under frost penetration rates ranging from about 4 to 75 mm per day. Maximum adfreeze stresses in the range of 150 to 350 kPa under varying rates of frost penetrat...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.541.510 http://pubs.aina.ucalgary.ca/cpc/cpc4-487.pdf |
| Summary: | Large-scale model studies of frost heave forces acting on horizontal, vertical, and inclined members embedded in a silt were carried out under frost penetration rates ranging from about 4 to 75 mm per day. Maximum adfreeze stresses in the range of 150 to 350 kPa under varying rates of frost penetration were measured on steel structural angles embedded vertically in the soil. A limiting value of 350 kPa was attained at a freezing rate of 4 mm per day. Maximum basal heave pressures in the range of 1900 to 2500 kPa were measured on a short steel structural member placed horizontally on the surface of the soil. No limiting value of basal heave pres-sure was attained under the test conditions used. Limiting resultant vertical pressures ranging from 350 to 1300 kPa were measured on steel structural members embedded at an inclination of 45 degrees. A graph of frost heave pressure versus member inclination was prepared on the basis of the study, which should serve as a guide for the design of structural units embedded in frost-susceptible soils. Des Ctudes de modtrles a grande Cchelle concernant les forces de soultvement par le gel agissant sur des Clements horizontaux, verticaux et inclinks plant & dans du limon, ont kte faites pour des vitesses |
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