PILOT TUBE AUGER BORING
The pilot tube auger boring method can install steel casings with an accuracy
that conventional auger boring is not capable of achieving. This method is used
in conjunction with a specially designed theodolite guidance system to provide
accurate pipe installation. Installation is achieved through video monitor surveillance
of an illuminated target inside the lead tube. Pilot tube steering is accomplished
by aligning an angled steering head to the desired course and thrusting
forward. After the steering head has reached the receiving shaft, a reaming head
is connected to the tubes, and the lead casing is attached to the reaming head.
The auger machine is connected and the tubes and casing are advanced. As the
casing moves forward, the tubes are pushed into the receiving pit and removed.