Fixing device for post-tensioned unbounded and bond-retarded prestressed reinforcement casing pipe

The utility model discloses a fixing device for a post-tensioned unbounded and bond-retarded prestressed reinforcement casing pipe. Practical problems of a conventional prestressed reinforcement casing fixing method are solved, the prestressed reinforcement casing pipe is prevented from being damaged, and the construction quality is improved. The device comprises a casing pipe bracket and a positioning and fixing ring, wherein the positioning and fixing ring is closed by a bolt, and is fixed on a positioning reinforcement; the casing pipe bracket is connected with the positioning and fixing ring through a support rod; a lining layer is arranged on the inner wall of the casing pipe bracket. According to the fixing device, damage to the prestressed reinforcement casing pipe caused by the excessively small contact area due to the use of a steel wire for fastening as well as abrasion to the prestressed reinforcement casing pipe and vibration of the prestressed reinforcement caused by too tight fastening during concrete vibration are avoided; the intactness of the prestressed reinforcement casing is ensured, the prestressed reinforcement wrapped inside is protected, and the service life of the prestressed reinforcement is prolonged; the fixing device is simple in structure and easy to machine, and has broad application prospect.