DRILL BIT OF NON-EXCAVATION DRILLING MACHINE AND POSITIONING METHOD FOR SAME

摘要

A drill bit of a non-excavation drilling machine. A probe (3) is arranged in the drill bit and antennas (1, 2) are arranged in the probe. At least two groups of antennas arranged coaxially are provided and mutually differed in frequency. A positioning method for the drill bit is also disclosed. By arranging the two groups of antennas in the drill bit, the distances from the two front points or the two rear points of the two groups of antennas to the antennas are the same according to the translation relationship, and therefore an operator only need to move a small distance (the distance between the two groups of antennas) to determine the axis direction of the underground probe during the whole drilling construction process of the drill bit. The moving distance is small, and operation is more convenient, more rapid and safer.