1results about How to "Calibration accuracy" patented technology

The application discloses a long-distance tunnel control through-accuracy measurement and verification system, and relates to the technical field of tunnel construction measurement. The system comprises a measurement control point, an observation traverse, a traverse stake, a traverse measurement network, the observation traverse being arranged on the traverse stake, one end of the observation traverse being connected with the measurement control point, the other end of the observation traverse being connected with the traverse measurement network, a first ground control network; the system further comprises a pilot hole, a verification traverse, a through tunnel, a horizontal drill hole and a second ground control network; the structure of the second ground control network is the same as that of the first ground control network, the verification traverse is arranged in the pilot hole and along the length direction of the pilot hole, the verification traverse is installed on the traverse stake of the second ground control network, one end of the verification traverse is connected with the measurement control point of the second ground control network, and the other end of the verification traverse is connected with the traverse measurement network through the horizontal drill hole. The application has the effect of verifying the through-accuracy measurement result of the first ground control network.