CFG pile-raft composite foundation structure capable of slowing down thermal disturbance of frozen soil and construction method

The invention discloses a CFG pile-raft composite foundation structure capable of slowing down thermal disturbance of frozen soil and a construction method. The CFG pile-raft composite foundation structure comprises a pavement structure layer, an embankment, a raft, an insulation board, a mattress layer, a back pressure slope, a movable layer and CFG piles. An embankment is arranged on one side of the pavement structure layer, a raft plate is arranged on one side of the embankment, a heat preservation plate is arranged on one side of the raft plate, a mattress layer is arranged on one side of the heat preservation plate, CFG piles are arranged on the pavement structure layer in a penetrating mode, and a movable layer is arranged at the bottom of the back pressure slope. Damage of hydration heat of CFG pile concrete to the CFG pile body and thermal disturbance of hydration heat of CFG pile concrete to surrounding soil bodies, especially permafrost layers are reduced, the hydration heat of the CFG pile body is