The invention discloses a raft built-in
dewatering structure, a sealing-well structure of a
dewatering well and a sealing-well method, and relates to the technical field of the
building construction.The raft built-in
dewatering structure is arranged at the bottom of a foundation pit, and comprises a
drainage ditch, a
water collection pit, a well
pipe, a water pump, an outer drainage
pipe and electric wires, wherein the well
pipe comprises a sand-free filter pipe and a water guide pipe, the sand-free filter pipe is embedded in the
water collection pit, the top of the sand-free filter pipe is lower than the upper surface of the
drainage ditch, the water guide pipe is arranged on the top of the sand-free filter pipe, the top of the water guide pipe exceeds the upper surface of the
drainage ditch, and the top of the water guide pipe is provided with a cover plate in a covered mode. According to the raft built-in dewatering structure, the technical problems that the dewatering well is arranged at a local
ponding position, sealing is conducted before concrete pouring of a base plate, then the base plate construction is conducted, if the
surface water level is high and the
water volume is large, the concrete pouring can not be conducted in time when sealing is conducted, resulting in a base plate
cushion layer and a waterproof and protective layer being buoyed by the
buoyancy of
groundwater due to sealing, thus the base plate
cushion and the waterproof and protective layer are destroyed are solved.