Durable super-large-span double-tower suspension bridge cable system fire-resistant structure

The invention relates to a durable super-large-span double-tower suspension bridge cable system fire-resistant structure which comprises a fire-resistant main cable and fire-resistant slings, a plurality of cable clamps are arranged on the fire-resistant main cable at intervals in the length direction, the fire-resistant slings are arranged between the cable clamps and a steel box girder, and sling anchorage devices are arranged at the upper end and the lower end of each fire-resistant sling respectively. The sling anchorage device at the upper end is connected with a sling clamp, and the sling anchorage device at the lower end is connected with a steel box girder; the fire-resistant main cable comprises a main cable body, the periphery of the main cable body is wound with an S-shaped steel wire, the periphery of the S-shaped steel wire is wrapped with an anti-corrosion sheath, and the periphery of the anti-corrosion sheath is provided with a main cable outer layer fire-resistant sheath; and the fire-resistan