Cast-in-place type rotating-around-fixed-shaft stair construction method

The invention relates to a cast-in-place type rotating-around-fixed-shaft stair construction method. The construction method comprises the following steps of A, woodworking processing: prefabricating a semicircular arc mold, prefabricating a pedaling base plate, prefabricating a column hoop which is made of threaded steel and consists of two semicircles, flattening and perforating two ends of the column hoop, and fastening the column hoop through a bolt; B, positioning and paying off: paying off a start pedaling line and a stop pedaling line, paying off a dotted curve from a drawing, and paying off an inner arc line and an outer arc line in a horizontal projection of a stair; C, mounting, dismounting and reinforcing a template. A rotating stair supporting method is easy to operate, and the stair is easy to mount and dismount; a worker can master the method through simple training; furthermore, the stair is high in overall stability, high in external quality and high in safety coefficient; by the use of waste