Fan foundation inner platform connected through bolts

The utility model relates to a fan foundation inner platform connected through bolts, which comprises an inner platform coaxially positioned in a steel pipe, the periphery of the inner platform is in threaded connection with a bracket component at the inner periphery of the steel pipe through a plurality of detachable supporting pieces, and a gap between a bracket ring plate of the bracket component and the inner platform is sealed through a ring plate. On-site welding is not needed, the periphery of the inner platform is in threaded connection with the bracket assembly on the inner periphery of the steel pipe through the detachable supporting pieces, and due to the fact that the detachable middle connecting pieces, namely the supporting pieces, are arranged between the inner platform and the bracket assembly, the size of the bracket assembly can be made to be small, and a rock-socketed drilling machine can conveniently enter a single-pile foundation for construction. And bad gas is prevented from diffusing i