Dewatering well and geological exploration hole drainage and plugging construction method

The invention discloses a drainage and plugging construction method for a dewatering well and a geological exploration hole. The drainage and plugging construction method comprises the following steps that S1, a sump is constructed; s2, embedding a water conduit; a first gutter from the sump to the blind ditch and a second gutter from the geological exploration hole to the sump are excavated on the side edge of the sump, a first water conduit is embedded in the first gutter, and a second water conduit is embedded in the second gutter; s3, building a sump; concrete masonry is conducted in the circumferential direction of the water collecting pit, the water diversion pipe is masonry in concrete, and the water collecting pit is filled with broken stones after masonry is completed; s4, gravel filling; s5, laying a protective layer; s6, after a raft plate is laid on the protective layer, an upper main body structure is constructed; and S7, plugging the dewatering well and the water conduit. According to the draina