HEAT INSULATED FOUNDATION Russian patent published in 2009 - IPC E02D27/01 E02D27/35 

FIELD: construction.

SUBSTANCE: invention is related to construction, namely to erection of buildings and structures on freezing heaving soils. Foundation on freezing soil includes rigid body comprising foot and wall, with gasket from the side of foot inverted to soil and made of heat insulation material, for instance from foam polystyrene, and also additional heat insulation material installed outside foundation limits. Upper edge of additional heat insulation material is pulled from the side of foundation external edge in the form of broken inserts via rigid body of foundation and is connected to additional heat insulator of opposite external edge of foundation. Pressure on soil in foundation foot is accepted as not higher than value of design resistance of heat insulation material to compression, and relative area of broken inserts (β=A_{br ins}/A₀) is defined from ratio β≤1-σ_max/R, where A_br.ins is area of broken inserts section, m², A₀ is gross area of foundation section in place of inserts installation, m², σ_max is maximum tension in foundation material from external loads, MPa, R is design resistance of foundation material, MPa. Additional heat insulation material installed on external side of foundation foot is connected to heat insulation material of foundation external wall. Additional heat insulation material installed on internal side of foundation foot is connected to heat insulation material of foundation internal wall. Inserts of additional heat insulation material of foundation are connected to ceiling heat insulation material above foundation. Heat insulation material installed from external side of foundation wall is connected to heat insulation material of blind area. Heat insulation material installed on internal side of foundation wall is connected to heat insulation material of ceiling above foundation.

EFFECT: provision of possibility to install foundation above design depth of heaving soil freezing, increased level of soil protection under foundation against freezing.

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