Inverted arch supporting assembly suitable for shield-type TBM tunnel prefabricated segmental lining structure

The invention relates to an inverted arch supporting assembly suitable for a shield-type TBM tunnel prefabricated segmental lining structure. Under the precondition that the segment structural property is not weakened, the problem that a lining segment is separated out from the shield tail and then naturally sinks can be effectively solved, the ring formation quality of the segment is greatly improved; and meanwhile, mounting of the segment can further be facilitated, and the structural waterproof property can be ensured. The inverted arch supporting assembly comprises threaded sleeves and inverted arch supporting components; the threaded sleeved are arranged in a structure on the outer side of the prefabricated segment in an enveloped mode according to the assembly point position, the inverted arch supporting components are symmetrically mounted and arranged on the outer side of the lower portion of an inverted arch and provided with inverted arch supporting legs and supporting threaded rods, and the support