Railroad bridge replaceable rockfall protection shed tunnel and construction method thereof

The invention relates to a railroad bridge replaceable rockfall protection shed tunnel and a construction method thereof. The railroad bridge replaceable rockfall protection shed tunnel comprises multiple independent shed tunnel sections in the bridge direction, and each section is an independent single shed tunnel; and the single shed tunnel comprises a plurality of arc-shaped hollow pipe piecesat the top, vertical stand columns on the two sides and connecting plates below the stand columns, every two adjacent components are connected with each other, and the inner sides of the connecting plates extend into the lower portions of wing plates of the railway box girder and are connected with the wing plates. Main stress components are made of ultra-high-performance concrete materials, the durability of the main stress components is far higher than that of common concrete and steel, and the service life of the main stress components meets the 100-year requirement of a main structure; andmain components can norma