Transverse arch type rail upheaval prevention tunnel bottom structure of strong expansive rock tunnel

The utility model relates to a strong expansive rock tunnel transverse arch type rail heaving prevention tunnel bottom structure which comprises a tunnel bottom and a rail plate supporting component arranged above the tunnel bottom, the tunnel bottom is a flat bottom paved by concrete blocks, the rail plate supporting component is an arch-shaped component, rail plate supporting piece supporting walls are arranged on the two sides of the tunnel bottom, and the rail plate supporting piece supporting walls are arranged on the tunnel bottom. The two ends of the track plate supporting component are arranged on the track plate supporting piece supporting walls respectively so that a cavity can be formed between the tunnel bottom and the track plate supporting piece, the supporting piece supporting walls are perpendicular to the tunnel bottom, and a center drainage pipe is arranged in the cavity. The tunnel bottom structure is safe, reliable, economical and applicable, and the problem that track operation is affecte