Articles
17.03.2011
Renovation
Chemically restoring pipeline position
Current renewal methods for pipelines and culverts are very effective for pipe function decline and accident prevention, but offer little in the way of rehabilitating meandering and slacks of pipes. Continually expanding urbanisation means that restoring pipeline position using open cut methods has become less desirable, and as such has led to the development of new pipeline position restoration technologies, such as the chemical injection method.
mehr02.02.2011
Auger boring through hard rock: overcoming the challenge
Hard rock is the true nemesis of the auger boring contractor, the evolution of auger boring know-how and its increased recognition as a more widely used and understood method of underground technology has introduced disc cutter head product tooling.
mehr19.01.2011
After the hurricane - rebuilding New Orleans
In the aftermath of Hurricane Katrina, more stringent requirements resulted in the innovative use of Trenchless Technology for the installation of underground infrastructure. Here we learn about a successful project involving two crossings near levees.
mehr29.12.2010
Zurich Rests on HOBAS
HOBAS Pipes as Auxiliary Static Support and Drainage System for the new Intra-Urban Train Tunnel in CH
mehr22.12.2010
An Overview of Jacked Structure Techniques - Part 2
Part 2 describes some of the new developments which open up a wider range of applications.
mehr10.12.2010
Robbins EPBs undercut Downtown Zhengzhou
Dual TBMs hollow out New Metro under Low Cover
mehr17.11.2010
Sewer rehabilitation using epoxy resin injection
The evolution in the repair of underground infrastructure such as water and wastewater pipes has resulted in the development of a highly competitive market in relining options. Here Paul Heenan from KA-TE PMO AG reflects on the importance of independent testing in the development and use of new products.
mehr10.11.2010
An overview of Jacked Structure Techniques - Pt. 1
Where one form of traffic (people, cars or trains) have to intersect and cross existing highways or rail tracks, this creates a hazardous situation. Inevitably even with all the safety measures such as barriers, traffic lights at junctions and crossings there are still an unacceptable number of accidents with injuries and deaths. At best such intersecting traffic streams result in delays and congestion. The segregation of various forms of traffic one from another is going to be even higher priority as our roads and rail tracks carry ever more traffic.
mehr28.10.2010
World Record. Main Breakthrough on the Epoch-Making Gotthard Project.
The breakthrough at the Gotthard Base Tunnel on October 15, 2010 in the Eastern tunnel marks the most significant milestone on the way to completing the longest railway tunnel in the world. With the 2 times 57 kilometer long epoch-making project, Switzerland is connecting northern and southern Europe by rail through the Alps. After completion of the project, Herrenknecht Gripper tunnel boring machines have excavated and secured more than 85km of the main tubes.
mehr20.10.2010
Refining the art: Neil Phillips looks at the progress made in the development of slurries and on-site slurry plants used for pipejacking projects
Over the past ten years the use of slurry tunnelling has increased in the pipejacking industry and, at the same time, developments have been made in surface separation plants and their operation. Many of these improvements have come from the oil and gas-drilling industry and are necessary due to the changes in waste-disposal legislation in the UK. For example, recent laws have been brought in to ban liquid waste going directly to landfill, while the price of off-site treatment and carriage have subsequently increased. This called for the pipejacking contractor to separate the slurry from the excavated material on site as effectively as possible, thus reducing the need to transport liquid and reduce the waste going to landfill. Competition for contracts and improvements to TBM excavation rates have also called for contractors to be able to maximise production to remain competitive. Several areas have improved over the years, including the composition of the slurry used, the use of flocculants, the separation plant itself and its more efficient operation.
mehr06.10.2010
Perforator® auger system aids motorway crossings project
Anyone driving around the UK at the moment using the motorway system will have noticed that there is a lot of work underway to install a huge automated traffic management system and information sign network. Part of this operation, organised by client The Highways Agency and its consulting engineer A.One+, one project has recently been underway on the M56 motorway between Junctions 9 and 16 under the ‘Triple Package Advanced Works’ designation.
mehr22.09.2010
A hint of Gizeh in Lennestadt
Anyone travelling to Gizeh will – not surprisingly – see pyramids. But when travelling to Lennestadt in the Sauerland region, nobody would expect it and is therefore truly impressed when standing in front of the pyramids there. The energetic concept is just as surprising.
mehr08.09.2010
Out of control
Lessons from an HDD project that was awarded for $ 1.74 Million with 90 days to complete that took in excess of $ 6 million and more than 1,000 days.
mehr26.08.2010
Double triumph for HDD in the Middle East
Carsten Fischbach of DrillTec GUT reports on two difficult undersea HDD projects in the Middle East, both of which have set a record in their own way.
mehr17.08.2010
Pipe bursting system with rotational assist in scottish rail culvert replacement
The West Highland Line (WHL) is the main railway line between Glasgow and Oban on the west coast of Scotland, the line runs alongside Loch Lomond up to Crianlarich then on to Oban, Fort William and Mallaig.
mehr28.07.2010
Electronic Trial Holes: The way forward?
Companies working on the installation and rehabilitation of our vital underground utility services are under mounting pressure not to impede the flow of traffic & commerce. Increasing Environmental and Health & Safety considerations place additional constraints on those companies who are still willing to undertake this vital work. Many companies now undertake trial hole programs to achieve a better understanding of the environment in which they are about to start work, but the potential for damage to occur to existing underground services, increases with every excavation and insurance costs continue to rise because damage to third party infrastructure continues to happen. The cost of these look ‘n’ see works in time, money & resources, as well as their disruption to the local economy & impact on the environment is no longer a price many are willing to pay.
mehr14.07.2010
Long Live Helleren Hydropower: Helleren Hydropower Station in Norway Received a Durable HOBAS Penstock
Helleren hydropower station is situated along the Helleren River north of the polar circle between Narvik and Harstad in Norway. Its wooden penstock DN 2500 has been in service since 1958 and has reached the end of its lifecycle. Hålogaland Kraft AS, one of the numerous Norwegian electricity companies that base their business on 100% hydropower, opted for a long term durable and maintenance free HOBAS CC-GRP HydropowerLine DN 2500, PN 6 to replace the penstock.
mehr17.06.2010
New methods for box culvert pipeline construction
Circular pipes have been used for over a century to construct infrastructure in urban areas. Rectangular pipes, on the other hand, and in particular pipes installed by pipe jacking, are a fairly recent development. In this article the authors describe the development and assessment of a rectangular pipe jacking system.
mehr15.04.2010
Robbins Main Beams burrow under Low Cover: Dual TBMs launched in World's Most Populous City
Two 6.4 m (21.0 ft) diameter Robbins Main Beam TBMs were launched in winter 2009-2010 beneath Chongqing, China - a mega-city of over 35 million people. The two machines are excavating twin 12 km (7.5 mi) long tunnels for Line 6 of the Chongqing Metro, and are the first hard rock TBMs to be used in the city.
mehr26.02.2010
Sewer management with qualitative and quantitative process control in arid areas by using the Cascade, Flush- and Discharge (CFD) Technology
1. Introduction In the densely populated cities of the world, drainage systems must be designed to carry away both the waste water from the population and the run-off from short and long rainfall events. The urban drainage method that has been mostly used is the so- called combined system, namely the simultaneous combination of waste-water and rainwater in a common pipe. Compared to the separate system this method has the economic advantage that urban drainage can be operated and managed using a single pipe system.
mehr17.02.2010
HOBAS ® Goes XXL: Pipes OD 3000 Jacked for Poland's Largest Wastewater Treatment Plant
3 meters are a little more than the average ceiling height of a flat, yet one can hardly be speaking of something "average" when talking about a 3 m pipe diameter – and yet this has become routine for HOBAS.
mehr05.02.2010
Robbins Small Boring Unit Earns a Place in the Record Books
Monumental Distance proves no Obstacle for Mixed Ground Cutterhead
mehr15.01.2010
Robbins EPB Racks Up Records for Sacramento Breakthrough
TBM Completes California’s UNWI Sewer Tunnel Ahead of the Curve
mehr28.12.2009
Advances in utility location
Advances in underground utility location could mean enormous savings – in economic, environmental and social terms. Here Jo Parker from Watershed Associates discusses some of the latest technological research and development emerging from the UK.
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