Horizontal auger boring, also referred to as jack-and-bore is a trenchless method to install steel casing from a launch shaft to a reception shaft with excavation done via a rotating cutterhead driven by a series of augers inside the casing pipe. The excavated material is removed through the auger string that is powered by the auger boring machine in the launch shaft.
- Accuracy (Un-Guided): Average accuracy is 1% of the installed casing diameter and achieved by use of water-level, tripping the augers, and adjusting shims in the front section of the casing.
- Accuracy (Guided): Acceptable accuracy for pilot tube guided auger boring is +/- 1-inch from the design grade at any location and +/- 3-inches from the design alignment at any location.
- Ground Conditions: Auger boring can be used in a variety of non-pressurized ground and environmental conditions.
- Product Pipe: Steel casing is used as the soil is removed via rotating augers inside the pipe string.
- Drive Length: Drive length is dependent on ground conditions and casing diameter. Typical installations are 400ft and under, however longer distances have been achieved.
- Shaft Size: Shaft size is dependent on product pipe length. Typical shaft lengths are 40ft long to accommodate 20ft pipe lengths.
Akkerman pilot tubes guided auger boring systems not only adapt to all leading manufacturers of auger boring equipment, but we also produce all-in-one packages for guided or un-guided casing installations. For more information, please contact our knowledgeable representatives today.