Detachable steel casing for river-crossing pile foundation construction

The utility model provides a detachable steel casing for river-crossing pile foundation construction, which comprises two semicircular steel casing units and a semicircular hoop ring, the two semicircular steel casing units are oppositely arranged, the two ends of each semicircular steel casing unit are provided with butt joint plates, the butt joint plates are provided with butt joint holes, and the butt joint holes are mutually locked through first bolts; the semicircular hoop rings are arranged above one of the semicircular steel pile casing units, and the semicircular hoop rings are provided with bolts and inserted into the bolt grooves of the corresponding semicircular steel pile casing units; thickened clamping plates are arranged at the two ends of the semicircular hoop ring and arranged on the outer sides of the two butt joint plates at the corresponding ends in a sleeving mode correspondingly. First bolt holes are formed in the thickened clamping plates, corresponding second bolt holes are formed in