FIELD: ice technology; erecting ice temporary bridge for freight hauling. SUBSTANCE: metal tubes are laid at angle to horizon on reservoir bottom at entry and exit points so that after ice cover has frozen their lower part occurs below ice and their upper part is above ice. Lower end of tubes is welded in advance. Cold air flowing inside tubes causes their icing and freezing of ice cover with reservoir bottom. EFFECT: enhanced strength of entry and exit of temporary bridge. 1 cl, 1 dwg
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