Foundation pit bottom plate downwarping correction structure

The utility model discloses a down-warping correction structure for a foundation pit bottom plate, and relates to the technical field of tunnel construction. The foundation pit bottom plate down-warping correction structure comprises an underground diaphragm wall and a bottom plate, the bottom plate comprises a pre-pouring plate body, a post-pouring plate body and an anchoring component, the underground diaphragm wall is arranged on the side of the pre-pouring plate body, the anchoring component is fixed to the side, close to the underground diaphragm wall, of the pre-pouring plate body, the anchoring component is provided with a tensioning rope, and the tensioning rope is connected with the post-pouring plate body. The tensioning rope is tensioned in the direction away from the underground diaphragm wall, so that the pre-pouring plate body and the underground diaphragm wall are separated to form a contraction area, the post-pouring plate body is arranged in the contraction area, and the underground diaphragm