Annular partitioning structure of assembled type rectangular shield tunnel lining

The invention discloses an annular partitioning structure of an assembled type rectangular shield tunnel lining. The annular partitioning structure consists of a top inverted arch partitioning block, a first corner part partitioning block, a first side wall partitioning block, a second corner part partitioning block, a bottom inverted arch partitioning block, a third corner part partitioning block, a second side wall partitioning block and a fourth corner part partitioning block which are connected in series in sequence in the annular direction, wherein the fourth corner part partitioning block is also connected with the top inverted arch partitioning block to integrally form a closed ring in a surrounding manner; splicing joints between the adjacent partitioning blocks are positioned at positions, which are lower in stress, on the lining. The splicing joints of all the partitioning blocks are positioned at positions, which are lower in stress, on the lining, so that stress on the partitioning blocks can be easily met; correspondingly, the partitioning blocks at the regions, which are higher in stress, on the lining are continuously arranged, so that the stress performance of the lining is effectively guaranteed; therefore the annular partitioning structure of the lining can better adapt to the stress characteristic of a rectangular shield tunnel, and the water resistance and the waterproofing capacity of the tunnel are effectively improved.