What sort of accuracy can be achieved with a microtunnelling installation?
Microtunnelling is the top of the trenchless tree when it to comes to accuracy. Microtunnelling machines typically run high end guidance systems with live monitoring so that the operator can correct in real time to ensure an accurate installation. Microtunnelling systems are typically capable of installations +/-25 mm with common accuracy of +/-10 mm. Please note this accuracy is a measurement from design line.
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An absolutely precise installation
Edge Underground were recently called upon to help complete a microtunnelling crossing for the Murilla Shire Council in Queensland. Lead contractor Shadforths Civil Contractors engaged Edge Underground to complete two road crossings and a rail crossing in order to complete the job. Each of the microtunnelling crossings required five precision horizontal bores to be completed for essential services including stormwater, sewer and water. For each crossing, these five bores were all completed from the same pit. When the Edge Underground crew arrived on site, there was concern regarding the ground conditions of clay and rock, and there was concern regarding...
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How long does it take Edge Underground to complete a microtunnelling project?
How long is a piece of string? A number of factors come into play when calculating how long a particular job will take – these include the length and diameter of an installation, the prevailing ground conditions, and the number of bores to be completed. If you have a job you need quoted, in terms of time or cost, the best thing to do is contact Edge Underground Managing Director Stuart Harrison on 0458 000 009.
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Building a sewer: why microtunnelling is the way to go
Throughout the world, utilities have found that installing sewer infrastructure using trenchless methods offers a variety of significant benefits over traditional open trench methods. Evidence suggests that overall these methods are safer, far less disruptive and more cost-effective and environmentally friendly. But which trenchless method should be used for a given project? There are a number of different methods available and to realise the maximum benefits the most appropriate method must be used. Trenchless construction options Two main methods of trenchless sewer construction are widely used today. These are horizontal directional drilling (HDD) and microtunnelling. Sewer installation via HDD involves...
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What are the main benefits the Vermeer AXIS guided boring system offers?
The main benefit the Vermeer AXIS guided boring system offers is accuracy – it can install water and sewer pipelines within +/-10mm. Importantly, this isn’t at the expense of time. A common complaint with microtunnelling is that while it is precise, it is slow and at times no more efficient than conventional trenching. With the Vermeer AXIS guided boring system, contractors can have their cake and eat it too: precise installation, completed in a timely manner.
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Extreme accuracy in changing ground conditions
Work is nearing completion on the Woolloongabba Sewer Capacity Upgrade, a major project designed to increase the capacity of the sewerage network in the inner Brisbane suburb. Major contractor John Holland has been undertaking various civil works and when extreme accuracy was called for to install the jacking pipe in a few tight spots, they were able to rely on Edge Underground. Woolloongabba, home to the famous ‘Gabba cricket ground, is an inner suburb to the Southeast of the Brisbane CBD. Changing demographics mean the population is expected to increase by 80,000 in the next few years as high-density apartment...
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What’s the difference between microtunnelling and AXIS?
The main difference between microtunnelling and the Vermeer AXIS guided boring system is the fact that AXIS achieves pinpoint accuracy, while also achieving excellent productivity. Edge Underground founder and Managing Director Stuart Harrison invented the Vermeer AXIS guided boring system. After 25 years of installing sewer and water pipelines, Stuart developed the Vermeer AXIS guided boring system to fill what he saw as a gap in the market. “Over the years I have worked with various microtunnelling equipment which might offer extreme accuracy, but could be cumbersome and time-consuming to work with,” said Stuart. “I wanted to combine accuracy with...
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