Non-guided auger boring
Ground conditions, pipe diameter, length, and bore precision are decisive
factors when choosing machinery and equipment, as well as the correct
process for completing the connections.
Protective steel piping is jacked into the ground from a launch shaft
correctly constructed for the jacking forces involved. The bore head
loosens the earth at the drill head, which is then conveyed back to the
launch shaft by the auger.
With non guided boring, the exact alignment of the machine is more important. The longer the jacking shaft, the more accurate the borehole, as it is possible to work with longer casings.
When connections are being bored from a launch shaft to a target shaft (open - open), the product pipes, which are the same diameter, push out the steel casings containing the auger sections. The casings - auger sections are then stored for use on the next drive.
Terebro Ltd can also provide casings with a threaded connection. When this is used, the product pipe can be pulled back from the target shaft by retracting the protective steel casings-auger sections into the launch shaft.
Possible applications:
In almost all soils and rock (with hammer).
Application limits:
Obstacles > 1/3 size of the OD of the casings
For information on Jacking pipes follow this link www.naylordenlok.co.uk
