Fan foundation structure capable of reducing dewatering depth of foundation pit

The utility model discloses a fan foundation structure capable of reducing the dewatering depth of a foundation pit, which comprises a fan foundation concrete bearing platform, backfill soil at the top of the fan foundation, high fill soil and piled rubbles, and is characterized in that the fan foundation concrete bearing platform is constructed in the foundation pit; the draught fan foundation top backfill soil is backfilled in a foundation pit after the draught fan foundation concrete bearing platform is constructed, and the high filling soil is arranged above the draught fan foundation top backfill soil in a filling mode and wraps and fixes the draught fan foundation concrete bearing platform in the circumferential direction of the draught fan foundation concrete bearing platform. The piled stone blocks are piled on the top and the periphery of a high filling soil pile formed by the high filling soil, and the top of the fan foundation concrete bearing platform is exposed out of the piled stone blocks. The