OptionX Group has trenchless technology sorted (Trenchless Australasia)

OptionX Group has formed and is ready to service all areas of the drilling and tunnelling industry.

Trenchless industry veteran and founder of microtunnelling powerhouse Edge Underground, Stuart Harrison, has established OptionX Group – connecting a selection of drilling and tunnelling businesses, including Edge Underground and Bournedrill. The new group will be equipped to service all areas of the tunnelling, drilling and boring industries.

Trenchless Magazine – 25 November 2022

A company with the edge, underground
As the Managing Director and founder of Edge Underground, Harrison has an in-depth and expansive knowledge of the industry and the necessary requirements to succeed in horizontal and vertical drilling. 

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Edge Underground: bringing innovation to microtunnelling (Utility Magazine)

Since it was established in 2010, Edge Underground has been at the forefront of the Australian microtunnelling industry, pushing its boundaries, improving equipment and finding ways to complete some of the most challenging projects that no one else will take on.

Edge Underground was founded by Managing Director, Stuart Harrision, a well-known figure in the Australian and international microtunnelling industry as a trenchless expert, pioneer of innovation and the inventor of the AXIS laser guided boring system.


“When I first developed the AXIS in the early 2000s, it was because there was a gap in the industry for equipment that could provide high efficiency, productivity and pinpoint precision. There were machines that offered one or two of these, but not all three,” Mr Harrison said.

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Iplex’s Restrain a win for Townsville Sewer Upgrade (Trenchless Australasia)

Iplex’s innovative product Restrain has contributed to the success of the Townsville Wulguru Gravity Sewer Upgrade. Trenchless Australasia – 26 September 2022

Restrain is a PVC-U pipe designed for both new sewer networks and for replacing existing underground gravity sewer infrastructure. The pipe sections have a threaded socket and spigot joint. The rubber ring seal for the joins is nested in a groove behind the spigot thread, which ensures that it is not dislodged during installation.

Restrain Sewer Pipe’s compatibility with trenchless technologies means that it was the perfect choice for use on the Wulguru Gravity Sewer Upgrade. Managing Director of Edge Underground, Stuart Harrison, was the installing contractor on the project. Harrison says that the biggest thing saved by using Restrain was time.

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AXIS guides the way (Trenchless Australasia)

The Vermeer AXIS guided boring system was launched at the International No-Dig Conference in Toronto in March 2009, where it went on to win the Innovative New Product of the Year award in the New Construction category.

Trenchless Australasia – 13 November 2014

The AXIS system is a pit-launched trenchless installation method, designed to achieve pinpoint, on-grade accuracy while eliminating some of the difficult steps associated with other installation techniques. A wide range of product pipe, sizing specifications, and other jobsite requirements can be met with the versatile capabilities of the AXIS system.

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Fighting against the elements: pre-planning for success in Townsville (Trenchless Australasia)


Heading into the wet season in northern Queensland, Edge Underground was working against extreme heat and flash flooding on a microtunnelling project to complete three lines – with one under a major state highway. Trenchless Australasia – 15 June 2022

Fighting against the elements and upcoming holidays, planning played a major role in ensuring the success of the project, so that when the worst scenario occurred, Edge Underground could perform its best and get the job done on time.

Edge Underground was subcontracted to complete three microtunnels in Townsville, partnering with Mendi Constructions, a well-known local business. The job required a 450DN, 500DN and 600DN concrete enveloper pipe to be installed – the small two pipes under one road, and the biggest and longest pipe under the Bruce Highway.

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Mitigating the challenges of installing pipeline under railways (Utility Magazine)



Installing a pipeline under a railway poses a number of challenges to contractors, and if any problems are encountered, the project could experience lengthy delays and extra costs. Here, microtunnelling expert Stuart Harrison looks at some of the key challenges and how these can be mitigated by selecting a microtunnelling contractor with the right equipment. Utility Magazine – 19 June 2019

Changing ground conditions

Understanding the prevailing ground conditions is key to achieving a successful microtunnelling installation, as this will determine the tooling used and help the contractor plan.

“The more that the contractor knows about the ground conditions at and around the site, the less chance there is of unexpected complications occurring,” Mr Harrison said.

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