TBM (tunnel boring machine) head ring segment lining assembled box type locking device

The utility model discloses a TBM (tunnel boring machine) head ring segment lining assembling type box type locking device. The TBM head ring segment lining assembling type box type locking device comprises a structural steel ring, a fixing piece, a TBM shield tail, an embedded piece, a back supporting piece and a primary support, the embedded piece is embedded in the primary support at the junction of an underground excavated tunnel lining and a segment lining, the first end of the back supporting piece is fixedly connected with the embedded piece, and the second end of the back supporting piece is fixedly connected with the structural steel ring. And the structural steel ring is welded and fixed with the TBM shield tail through a fixing piece. The steel ring structure can be hoisted in place in advance through the vertical shaft hoisting equipment, the hoisting condition is good, the steel ring structure is assembled through bolts, positioning is easy, the positioning precision is high, safety and high effi