Foundation bottom plate buffering mechanism for controlling cracks of ultra-long concrete structure

The invention relates to the technical field of foundation construction, in particular to a foundation slab buffer mechanism for controlling cracks of an ultra-long concrete structure, which comprises a base plate, a base embedded frame is fixed on the bottom surface of the base plate and is embedded in a foundation, a limiting frame is fixed on the top surface of the base plate and is poured in foundation slab concrete, and a movable plate is movably inserted into the surface of the limiting frame; the foundation slab buffering mechanism has the beneficial effects that after the foundation embedding frame and the limiting frame are embedded in the foundation and the foundation slab respectively, the foundation slab embedding frame arranged on the outer side of the limiting frame is also embedded in the foundation slab; a rubber clamping plate is arranged between the limiting frame and the foundation bottom plate embedding frame, and rubber buffer plates are fixed to the surfaces of sealing plates on the two