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Guided Auger Boring

Often referred to as Guided Thrust Boring or Micro Tunnelling.

Compact boring equipment operates from shafts or pits as small as 2.40mØ. Allen Watson designs, owns and operates the widest, most powerful and versatile range of guided auger boring systems for trenchless applications. With jacking forces from 85te to 155te, we provide total trenchless solutions for the installation of gravity pipes, cable ducts or simply where accuracy is paramount.

We are extensively using this as a safe and cost-effective alternative to micro-tunnelling, timber headings and in many instances open cut.


  • Accurate installations +/- 25mm over distances up to 100 metres between pits
  • Can operate from shafts as small as 2.40mØ
  • Ideal for gravity drainage pipes, cable ducts or accurate installations
  • Can install variety of pipe materials, such as clay, steel, PE, concrete or GRP
  • Dry method of installation - unlike micro tunnelling does not generate slurry
  • Auger boring is unaffected by surface obstacles
  • No disruption to surface, buildings, road, river, rail or traffic
  • By boring underground the working area is confined to entry and exit points
  • Unlike micro tunnelling, Guided Auger can be retracted back to the working pit
  • Can be used to install pipes in changeable ground conditions
  • Auger boring is quick and in many cases has lower overall costs

Below: Guided Auger Boring images
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For more images of Guided Auger Boring, see our Gallery page

What is Guided Auger Boring?

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Using a digital camera giving real-time monitoring, a pilot bore is driven to line and level. Once complete, the auger follows the pilot prior to pipe installation.

Typical Applications

  • Steel pipes and ducts from 100mmØ up to 1016mmØ or drainage pipes from DN150 up to DN900.
  • Distances from 5 metres up to 100 metres have been successfully installed under railways, roads, rivers, airports, buildings, contaminated landfill sites and Sites of Special Scientific Interest (SSSI).
  • Crossings can be for water, oil, gas, electricity, sewerage, chemicals, communication ducts and outfalls.

Pilot boringMultiple parallel bores pitJacking vitrified clay pipeSteel casing guided installationGuided bore steel casingExit pit multiple boresGravity drain from deep shaftGuided auger boring