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Steadiness of granular materials on ice-coated road surface Smirnov, Alexander V ; Meshtsheryakov, Vassily I

By: Contributor(s): Language: English Language: French Series: ; topicVI-11Publication details: XIth international winter road congress 2002, Sapporo [Japan] / XIe congres international de la viabilite hivernale 2002, Sapporo [Japon]. Paper, 2002Description: 7 sSubject(s): Bibl.nr: VTI 2002.0071Location: Abstract: The present paper considers stability conditions of granular materials of different shape, frozen in ice, when they are subject to impact of vertical and horizontal loadings from wheeled vehicles. It shows, that to ensure proper cohesion of wheels with the surface of road, covered with ice, the determinate sizes of fractions of granular materials and determinate mass on an area unit are required. It is determined in the paper, that the minimal depth of freezing of a spherical or pyramidal grain should make not less than 0.6 of its height, what ensures its steadiness from turning or overturning. The grains with a diameter of 12 mm, frozen into ice, ensure traveling of 30 trucks with a loading on an axis of 100 kN, but fine grains with a diameter of 4-6 mm - only 10 trucks. An ice stratum with the grains, frozen in in one row, does not split up, if mass of grains of natural rock makes from 0.5 up to 1.6 kg/m2.
Item type: Reports, conferences, monographs
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The present paper considers stability conditions of granular materials of different shape, frozen in ice, when they are subject to impact of vertical and horizontal loadings from wheeled vehicles. It shows, that to ensure proper cohesion of wheels with the surface of road, covered with ice, the determinate sizes of fractions of granular materials and determinate mass on an area unit are required. It is determined in the paper, that the minimal depth of freezing of a spherical or pyramidal grain should make not less than 0.6 of its height, what ensures its steadiness from turning or overturning. The grains with a diameter of 12 mm, frozen into ice, ensure traveling of 30 trucks with a loading on an axis of 100 kN, but fine grains with a diameter of 4-6 mm - only 10 trucks. An ice stratum with the grains, frozen in in one row, does not split up, if mass of grains of natural rock makes from 0.5 up to 1.6 kg/m2.

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