Positioning prism support for cable-stayed bridge tower column cableway pipe

The utility model discloses a cable-stayed bridge pylon cableway pipe positioning prism support, which relates to the field of engineering surveying, and comprises a prism frame provided with a prism, at least three telescopic rods are fixed on the prism frame, and a fixing device is arranged at the end part, far away from the prism frame, of each telescopic rod. According to the prism bracket, the prism can be fixed on the inner wall of the cableway pipe by using the fixing device, so that the process of erecting a prism rod is reduced, and the measurement efficiency is improved; the position of the prism can be adjusted to the center of the section of the pipeline by using the plurality of telescopic rods, measurement errors caused by inaccurate erection of the prism position are reduced, so that the measurement accuracy is improved, meanwhile, the bracket is simple in structure, convenient to carry and operate, a single person can obtain a measurement result by using the bracket, the measurement difficulty