Tunnel wall protective portal of cable bridge stand

The utility model relates to the technical field of cable bridge stand wall penetration and specifically relates to a tunnel wall protective portal of a cable bridge stand, solving problems that in the prior art of cable bridge stand wall penetration, the quantity of tunnel portal fire-proof putty needed for filling is large and the construction quality is poor. The tunnel wall protective portal comprises a rectangular cylindrical sleeve the thickness of which is same as the thickness of a wall. A fireproof plate is arranged on the periphery of one end of the rectangular cylindrical sleeve and is sealed with the wall. A fireproof bag is filled into the rectangular cylindrical sleeve and contacts with cables inside the cable bridge stand. The periphery of the other end of the rectangular cylindrical sleeve is provided with a waterproof cofferdam. The rectangular cylindrical sleeve is made of a galvanized iron sheet. The tunnel wall protective portal is simple in structure and reasonable in design and is advant