Horizontal force self-balancing type splayed heavy type upper air support system and installation method thereof

The invention discloses a horizontal force self-balancing type splayed heavy type upper air support system and an installation method thereof. The system comprises multiple stress units arranged at intervals. The stress units are connected through connecting rods. Each stress unit comprises an upper steel corbel, a lower steel corbel, a splayed steel frame, a horizontal supporting rod and an oppositely-pulling prestress inhaul cable, wherein the upper steel corbel and the lower steel corbel are embedded in bridge body tower columns on the two sides, the two ends of the splayed steel frame are correspondingly arranged on the upper steel corbel and the lower steel corbel, and the horizontal supporting rod is connected between the lower ends of the splayed steel frame. The support system is supported on the tower columns, so that a huge and complex support system of a landing support is omitted. The support system is large in bearing capacity and application span and no disadvantageous horizontal force is generated to the bridge body tower columns; and the support system is formed by connecting the units and through the combination of the units, the support system can be suitable for beams of different widths.