Support frame for shield tunnel

The utility model belongs to the technical field of engineering, and particularly relates to a support frame for a shield tunnel, which comprises a support mechanism. A pressing mechanism is mounted on the inner side of the supporting mechanism, an auxiliary supporting mechanism is fixed to one end of the pressing mechanism, and a pressure supporting mechanism is mounted on the bottom side in the supporting mechanism; the supporting mechanism comprises round shells, the round shells are connected through tenons, a mounting base is fixed to the bottom side in each round shell, a supporting table is fixed to the top side of each mounting base, a protruding block is fixed to the top side in each round shell, a supporting rod is mounted on each protruding block, and a fixing base is fixed to the bottom side of each supporting rod. The inner wall of a tunnel is supported through the circular shell, the interior of the circular shell is supported through the supporting table and the supporting rod, the supporting f