The invention relates to a building boundary beam
frost heaving prevention structure which comprises a beam bottom heat preservation layer, a
cushion layer, a filling layer, a beam outer heat preservation layer on the outer side of a boundary beam and an
asphalt isolation layer, the beam bottom heat preservation layer is arranged on the bottom face of the boundary beam, the
cushion layer is arranged on the bottom face of an excavation pit, and the space between the beam bottom heat preservation layer and the
cushion layer is filled with the filling layer; the
asphalt isolation layer is arranged on the outer side of an integral structure formed by the edge beam, the beam bottom heat preservation layer and the filling layer, and the beam outer heat preservation layer is arranged on the outer side of the
asphalt isolation layer; the beam bottom heat preservation layer and the beam outer heat preservation layer are both
polystyrene foam
extrusion molding heat preservation plates. The invention further relates to a construction method of the building boundary beam
frost heaving prevention structure. According to the structure, the heat preservation
layers are arranged on the beam bottom and the outer side of the beam, the effect of foundation
soil frost heaving force on the foundation boundary beam is reduced or avoided, and on the basis that the construction efficiency and quality are improved, the construction cost is reduced, and the construction period is shortened.