Reinforced concrete arc-shaped structure rigid-flexible combined formwork device and construction method

The invention discloses a reinforced concrete arc-shaped structure rigid-flexible combined formwork device which comprises an inner flexible supporting structure, a protection layer, an isolation layer and an outer rigid supporting structure. The inner flexible supporting structure is formed by combining a rigid base and a flexible air bag body; the flexible air bag body is fixed to the rigid base, an inflation inlet is reserved in the flexible air bag body, and the rigid base is fixed to the formwork support platform. A reinforced concrete arc-shaped structure rigid-flexible combined formwork device formed by combining an inner flexible supporting structure, a protective layer, an isolating layer and an outer rigid supporting structure is arranged, the inner flexible supporting structure is arranged to be formed by combining a rigid base and a flexible air bag body, and the flexible air bag body is inflated; and compared with a traditional formwork, the whole radian streamline is better, and therefore the fo