METHOD FOR MANUFACTURING REINFORCED CONCRETE PIPE

PROBLEM TO BE SOLVED: To provide a reinforced concrete pipe capable of improving a cracking strength due to an external pressure and prevention of the crack and provide a method for manufacturing the reinforced concrete pipe, and a form to be used for its execution. SOLUTION: In the manufacture of a Hume pipe wherein forming is carried out by using an expansive concrete pipe by use of a form 1 constituted by joining forms for a divided circumferential part 2 and 2' and forms for an edge part 8 and 8' together, as a form-tightening means M for the forms for a divided circumferential part 2 and 2', the forms for a divided circumferential part 2 and 2' are restricted with each other in centrifugal molding; that of a structure for lightening the restriction is used in a process of steam curing; and in the process of steam curing process, the restriction due to the forms for a divided circumferential part 2 and 2' are lightened to extend a spiral reinforcement A and chemical prestress is induced.