Large-span traffic tunnel supporting structure

The invention relates to the technical field of tunnel supporting, and discloses a large-span traffic tunnel supporting structure which comprises a supporting steel body, bottom plates and connecting frames are fixedly connected to the inner walls of the two sides of the supporting steel body, a fourth supporting plate is arranged between the connecting frame and the bottom plate on the same side, and a plurality of inserting columns are fixedly connected to the top of the fourth supporting plate; a plurality of second inserting holes matched with the inserting columns are formed in the bottom of the connecting frame, the inserting columns are connected with the second inserting holes in an inserted mode, and a plurality of first interval grooves are evenly formed in the upper surface of the bottom plate. The overall strength of the supporting steel body can be enhanced, so that the quality of the supporting steel body can be improved, the supporting effect of the supporting structure is improved, the safety