| 摘要 |
PROBLEM TO BE SOLVED: To provide a survey system for a tunnel boring machine capable of easily measuring the location of the center of a cutting face at an excavating part of the boring machine. SOLUTION: The survey system for the tunnel boring machine 1 is provided with survey equipment 9 provided inside the tunnel boring machine 1 for measuring included angles between survey points and distances to the survey points, a plurality of the survey points A1 and A2 in a tunnel provided for the inner walls of the tunnel T in the rear of the boring machine 1 and situated at known locations with respect to a reference location set on the ground, etc., and a survey point Y in the machine provided inside the boring machine 1 and situated at a known location with respect to the center X of the cutting face at the excavating part. By the survey equipment 9, the location of the survey equipment 9 with respect to locations of the survey points A1 and A2 in the tunnel is surveyed, and the location of the survey point Y in the machine with respect to the location of the survey equipment 9 is surveyed. On the basis of the location of the survey point Y in the machine, the location of the center X of the cutting face is specified. COPYRIGHT: (C)2003,JPO |
