METHOD FOR CONSTRUCTION OF APPROACH EMBANKMENT TO BRIDGE PIERS ON PERMAFROST GROUNDS

摘要

FIELD: construction; may be used in construction of road embankments in permafrost regions. SUBSTANCE: method consists in that in spring period of the year, a platform is filled with rock or coarse-grained dry frozen ground onto natural base cleaned of snow. Laid on filled layer of ground is calculated layer of compacted snow or ice, and covered with a layer of dry frozen ground. Height of ground fill is determined by reduction of full height h_n of embankment by height of layer of upper ground fill. The required thickness of compacted snow is determined by formula H = 0.0316T/ and value of decrease of ground temperature at depth of 10 m is determined by formula &Dgr;t= -52/T, where T is number of degree-months of positive temperatures in summer period: T=, where t₁ is average monthly positive temperature of outdoor air; n i number of months with positive temperature in summer; h_n is full height of embankment. EFFECT: provision of immediate decrease of temperature of base grounds with winter-spring construction of embankment with frozen ground. 2 dwg