Anti-collapse supporting device special for road, bridge and tunnel construction

The utility model relates to the technical field of tunnel construction supporting equipment, in particular to a special anti-collapse supporting device for road, bridge and tunnel construction, which comprises a shear type lifting frame, a locking seat is arranged in the middle of the lower side of the front surface of the shear type lifting frame corresponding to a screw shaft, and a loading bottom plate is arranged at the end part of the shear type lifting frame. A supporting top plate is arranged at the end of the supporting stand column, an auxiliary top plate is installed on the supporting top plate through an adapter plate, positioning sliding grooves are formed in the front side face and the rear side face of the auxiliary top plate correspondingly, a supporting rod is arranged at the outer end of an adapter shaft, and a lead screw shaft is locked through a locking base, so that the supporting stability of the shear type lifting frame is high; the whole use safety is improved, the auxiliary top plate