Precast concrete stair for arch dam

The utility model discloses a precast concrete stair for an arch dam. The precast concrete stair for the arch dam comprises a group of stair board (1); two ends of the stair board (1) are provided with outriggers (2); and the outriggers (2) are connected by a cover plate (3). Each component of the precast concrete stair for the arch dam is the reinforced concrete precast component, and can be produced in batches in the precast factory. The construction temporary project amount is small, the rest components can be installed after the end of the dam body construction except the outriggers which are needed to be embedded in the dam body during the dam construction, the interference of the stair construction to the dam body construction is reduced in the greatest degree, specifically the effect of roller compacted concrete arch dam for the higher mechanized construction level is more remarkable. The precast concrete stair for the arch dam is capable of, according to the actual arrangement need, randomly adjusting the size of the component, and flexibly and conveniently installing. The precast concrete stair for the arch dam is the reinforced concrete component, the durability is good, the integrality is good, and the safety is high.