Guided Boring

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The Guided Boring Method (GBM), also referred as Pilot Tube Microtunneling (PTMT), utilizes small diameter tubes (pilot tubes) that are installed and steered through the ground by utilizing a slanted face at the cutting head containing a target with light emitting diodes (LEDs) and a camera mounted theodolite that is located in the shaft to achieve high accuracy in line and grade. The hole is enlarged to the same outside diameter of the final product pipe after the installation of the pilot tubes and the pipe is either jacked or pulled into place.