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- W2384414369 abstract "In this paper the laboratory experimental results of ventilated railway embankment in permafrost regions are presented. The model embankment is 1^00 m high and 5^13 m long at the bottom and 2^13 m long at the top, and the slope is 1∶1^5. The environmental temperature of the model embankment is changed according to a sine function %T=-3^5+12%sin%(2π15τ)%, and the wind is about 3^2 m5s~ -1 at the inlet site of the ventilated duct and about 2^37 m5s~ -1 at the outlet. The test period is 15 days, including a freezing period of 8^1 days and a thawing period of 6^9 days. Three freezing|thawing cycles are conducted. The filling of the embankment is sandy gravel.;The temperature curves of some typical sites of the ventilated embankment are analyzed. The temperature fields of three typical sections (cross|section, the symmetric axis section and section between two of the ventilated ducts) at two different moments (the end of the freezing period and the end of the thawing period) are analyzed too. Results show that at the bottom of the embankment temperature variation is not according to changing air temperature, but temperature near the embankment surface varies with air temperature. Along the wind direction, the distribution of temperature in the embankment is not symmetrical when the freezing period is over, but it is symmetrical when the thawing period is over. Temperature difference at different sites in the ventilated ducts is obvious during the temperature descending in the freezing period. The non|symmetrical distribution of air temperature in the ventilated duct is accordance with the non|symmetrical distribution of soil temperature of the embankment. The slope of the temperature curve is very small at the embankment bottom, where the temperature is close to 0 ℃." @default.
- W2384414369 created "2016-06-24" @default.
- W2384414369 creator A5082835113 @default.
- W2384414369 date "2002-01-01" @default.
- W2384414369 modified "2023-09-25" @default.
- W2384414369 title "Temperature Field Features in the Laboratory Experiment of the Ventilated Railway Embankment in Permafrost Regions" @default.
- W2384414369 hasPublicationYear "2002" @default.
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