Tunneling
Koorboo’s tunneling methodologies are used to install utilities and pipelines beneath obstacles, without requiring extra space for an entry or exit angle. They are best suited for shorter crossings and large-diameter installations.
Tunneling is also ideal for installations that pass through groundwater, unconsolidated formations, and debris. These methodologies can also overcome challenges associated with restricted work spaces.
We offer a variety of tunneling services to meet your project requirements, including:
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Our Tunneling Services
Explore our comprehensive range of tunneling services designed to meet diverse project needs, from precision boring to large-diameter installations. No matter the challenge, we have the expertise to deliver efficient and reliable results.
Horizontal Auger Boring
- Used to install steel casings with diameters ranging from 305 mm to 1.8 m (12–72 inches)
- Often combined with a Small Boring Unit (SBM) for drilling through solid rock.
- Frequently used for cleaning out casings and culverts.
Pneumatic Pipe Ramming
- Used to install pipes with diameters ranging from 305 mm to 3.6 m (12–144 inches).
- Works in a variety of soil types, including gravel, cobble, and sand.
- Can complete installations at any angle — from horizontal to vertical.
Guided Boring
- Used to install 305 mm to 3.6 m (12 in to 144 in) diameter pipe.
- Often combined with a Small Boring Unit (SBM) for drilling through solid rock.
- Frequently used for cleaning out casings and culverts.
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Down the Hole Hammer (DTH)
- Capable of tunneling through cobbles, boulders, and solid rock.
- Spoils are removed from the casing by airway augers.
Slip Boring
- Used to install oil & gas pipelines ranging from 51 mm to 1067 mm (2 in to 42 in) in diameter.
- Has a maximum installation length of 150 m (492 ft).
- Does not leave casing in the ground.
Tunnel Boring / Pipe Jacking
- Used to install pipe up to 4.2 m (168 in) in diameter.
- Can bore through a variety of soil and rock strata, from sand to rock.
- Tunnel diameters can range from 1 m and exceed 15 m (3 ft to 49 ft).
Surface Casing
- Installs a starter casing, which guides the drill during HDD activities.
- Casings average 30 m to 50 m (98.5 ft to 164 ft) in diameter, and can reach an installation length of 200 m (656 ft).
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