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Method of construction (design principles) road embankment on permafrost (under global warming)
Method of construction (design principles) road embankment on permafrost (under global warming)
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机译：多年冻土（在全球变暖下）的路堤施工方法（设计原则）
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摘要
1. A method of erecting a road embankment on permafrost ensuring thermal and general stability of the frozen base, in terms of global warming, comprising assumption partial thawing of the frozen soil foundation active layer during operation, characterized in that comply with the following conditions provide thermal and total stability: 2,0≥N / N≥1,0 (1) 4,5≥N≥1,3 (2) (3) where neither H- respectively depth of freezing and thawing of the road embankment (structure) with a layer of the subgrade, m height H of road nasy pi (constructs), m; T T predictive winter and the average temperature for the cold air (winter with T≤0), ° S.ΔT - predicted increase (warming) winter temperatures in permafrost in the 21st century (for RF North an average of 3-5 ° C) .2. The method of claim. 1, characterized in that the depth of freezing and thawing road embankment with the active layer of the frozen base determined in consideration of the thermal energy of water phase transitions and changes in the thermal substandard (waterlogged and frozen) soils during compaction ratio of at least 0.90, for example, by the following formulas: depth of seasonal thawing road embankment and its foundation layers according to the formula :, (4) where τ- duration of defrosting h; L- number of phase transitions of the latent heat of moisture in 1 m, λ- koe coefficient of thermal conductivity in the soil thawed state, W / (m · ° C) or (kcal / (m · h · ° C)); T- average temperature for the hottest summer month, ° C; C- volume heat capacity of unfrozen soil, kJ . / (m · ° C) (kcal / (m · ° C)) depth of seasonal freezing layers road embankment and its foundation by the formula: (5) somewhere average coefficients
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