Supporting mechanism for laying tunnel top reinforcing plate and supporting method of supporting mechanism

The invention relates to the field of tunnel reinforcement, in particular to a supporting mechanism for laying a reinforcing plate at the top of a tunnel and a supporting method thereof.The supporting mechanism comprises a supporting table, steering blocks are symmetrically installed on the two sides of the upper surface of the supporting table, and a lifting unit is jointly installed at the tops of the steering blocks on the two sides. A clamping plate at one end of the clamping rod can move when the clamping rod is rotated, so that the two clamping plates in the clamping frame can clamp the reinforcing plates with different thicknesses, and the clamping operation on the reinforcing plates with different widths can be realized by arranging a telescopic plate; clamping frames on the two sides can clamp the side edges of the reinforcing plate more stably through arrangement of teeth, the reinforcing plate is prevented from sliding, multiple attaching rods in an arc-shaped top plate can be moved out through arr