Foundation pit decompression well sealing structure

The utility model relates to the field of foundation pit pressure relief well construction, in particular to a foundation pit pressure relief well sealing structure which comprises a steel pipe embedded in a pressure relief well and further comprises a bottom plate poured on the ground on the peripheral side of the steel pipe, the bottom plate comprises a plurality of prefabricated plates which are sequentially connected end to end, and a cast-in-place part is poured in a space defined by the multiple prefabricated plates; a plurality of fixing rods fixed to the ground are inserted into the prefabricated plate, and a supporting rod is connected between each prefabricated block and the steel pipe. Compared with the prior art, in the scheme, when the bottom plate is constructed, the verticality of the steel pipe can be restrained, the steel pipe is not prone to inclining, and therefore the influence on the sealing effect of the relief well can be reduced when the bottom plate is constructed. 本申请涉及基坑减压井施工的领域，尤其是