Reinforced ventilating heat-proof foundation

The invention discloses a strengthening ventilation heat-insulation roadbed, characterized in that compacting sand-gravel-soil cushion is set on the compacting native surface; transverse concrete air ducts through wall with automatic air door controlled by temperature are set on the sand-gravel-soil cushion in a certain distance; crushed stone layer is set between air ducts through wall and above them; earthwork cloth is put on the horizontal crushed stone layer; heat insulation material is set on the earthwork cloth; and compacting embankment fill is filled on the heat insulation material. In the invention air ducts through wall are set in the crushed stone layer. In winter, by using lower temperature in frozen earth area and bigger wind speed through permeable hole of air duct the effect of convective cooling of air in the crushed stone layer is strengthened and there is strong ventilation cooling effect in air duct through wall itself. Two are combined with each other and are used by each other to decrease the temperature of frozen soil under the roadbed. In summer, the heat insulation material, the crushed stone layer and air duct through wall with air door controlled by temperature can play a role of thermal screen effect so as to prevent heat energy entering into embankment. At last storing cooling energy to the utmost is achieved; the temperature of frozen soil is decreased, the melting of frozen soil is avoided and the stability of embankment of frozen soil is ensured.