Rehabilitation

From the magazine, Microtunnelling, Rehabilitation, Tunnelling, Utility location

Grundoburst 1250 G on site in Warsaw, Poland

In the old part of Warsaw in Poland a ND 400 mm clay pipe required replacement over a length of 30 m. Inspection of the mains by the water and sewerage company in Warsaw showed regular sand on the bottom of the mains, so that it was apparent that the main was fractured and bit and pieces fell to the bottom of the pipe. This presented a permanent problem of undercarving the road surface - an imminent danger to the public.
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From the magazine, Microtunnelling, Rehabilitation, Tunnelling

Long distance microtunnelling with polymer concrete

Polymer concrete (PC) products have been used for decades in the engineering, building and chemical industry. PC pipe was first developed in the late-1960s by German-based construction company, Zublin. Dr Gerhard Lang explains the benefits of using PC pipe while implementing Trenchless Technologies such as microtunnelling and pipe jacking.

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From the magazine, HDD, Rehabilitation, Spray lining, Tunnelling, Utility location

An Australian First

In Situ Spray Lining for the Rehabilitation of Watermains - A Sydney Water and an Australian Water Industry First

In its drive to become the market leader in the provision of innovative pipeline solutions to water and wastewater infrastructure owners, CLM Trenchless has recently acquired the licence for the spray lining system using the Copon Hycote 169HB (Hycote) product, developed by UK coatings company E.Wood (3M).

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From the magazine, HDD, Rehabilitation, Tunnelling

HDD helps expand water supply in NSW: UEA uses Vermeer drill rig to power through rock formations

The recent Shannon Creek Storage Facility project undertaken by Leighton Contractors on behalf of the Clarence Valley Council and North Coast Water will provide 30,000 mega litres of water storage for the towns of Coffs Harbour and Grafton in northern New South Wales. The population of this region is projected to grow from 90,000 to 220,000 by the year 2050.
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From the magazine, Rehabilitation

Fusing at higher interfacial pressures

Discussion continues as to whether the best way to fuse polyethylene (PE) pipe is at an interfacial pressure of 0.15 MPa (21.75 psi) or 0.517MPa (75 psi). Both procedures are widely used and produce good outcomes when destructively tested as well as surviving the test of time. A paper by Ted Striplin of McElroy Manufacturing in the USA sets out to provide some preliminary examples for the benefits of fusing at higher interfacial pressures.
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