Semi-underground subway station construction technology and semi-underground subway station

The invention discloses a construction process of a semi-underground subway station. The semi-underground subway station at least comprises a first underground floor, a driving plate layer, a station hall layer, pile foundations and a drainage chamber. The semi-underground subway station construction technology comprises the steps that S1, construction preparation is conducted; s2, post-grouting cast-in-situ bored pile construction is carried out; s3, measuring and setting out; s4, mounting an earth surface drainage system; s5, inserting and driving steel sheet piles; s6, excavation of a foundation pit; s7, foundation pit base treatment; s8, constructing a framework of the negative first floor; s9, backfilling the foundation pit; s10, a support is erected; s11, main bridge box girder construction; s12, the support part is dismantled; s13, a traffic lane plate layer is constructed; s14, the continuous part of the support is disassembled; s15, construction of a station hall layer; s16, the support is completely