Foundation pit waterproof structure with abundant interlayer water

The utility model discloses a foundation pit waterproof structure under rich interlayer water, and belongs to the field of building foundation pits. The foundation pit waterproof structure comprises apit wall drainage ditch, a pit bottom drainage ditch and a draining well. The pit wall drainage ditch comprises a pit wall horizontal drainage ditch excavated along an interlayer soil boundary and apit wall slope drainage ditch arranged along the slope direction of the pit wall; and the pit wall slope drainage ditch is communicated with the pit wall horizontal drainage ditch. The pit bottom drainage ditch comprises a foundation pit lower opening drainage ditch arranged along the foundation pit lower opening line and a foundation pit middle drainage ditch communicated with the foundation pitlower opening drainage ditch and extending into the middle of the foundation pit, and a gravel layer, a foundation concrete cushion layer and a waterproof layer are sequentially arranged in the pit bottom drainage ditch from ri