Articles

DALROD UK Ltd, with offices in both Peterborough (Head Office) and St Ives (Cambridgeshire) and depots across East Anglia, the Midlands and the North East of England, has once again proved itself as a leader in the drainage maintenance and repair field by successfully completing a technically challenging job, with the minimum of disruption, close to historic Ely Cathedral, using trenchless lining techniques.

Utility Tunnelling – Longer, Deeper, More Curvaceous

Utility Tunnelling, comprising both pipe jacking and microtunnelling, develops into the prevailing construction method at global level for drains and sewers in metropolises. This popularity growth is accompanied by the need for ever-more demanding projects. To put it simply, utility tunnelling projects take on increasing depths and lengths.

Pipeline Rehabilitation: Performing Under Pressure in India

There has long been a common myth to the effect that no spiral wound liner can perform when used as a method of rehabilitation/liner in pressure pipelines. This perception is born perhaps from the perceived fact that the majority of such liners are machine wound from a starting pit, or manhole, from where they are also grouted, often under less that ideal conditions, leading to voids behind the liner which subsequently result in the distortion of the liner when the pipeline is pressurized, which in turn then leads to tearing of the joints and a general catastrophic liner failure. This myth is further perpetuated by the fact that most spiral wound liner manufactures state in their product data that the lining of pressure pipes cannot be recommended with their system.

Achieving Great Things With Pipe Jacking

Akkerman equipment is designed for accuracy, durability, ease of set-up and powerful jacking force. In the case of PCi Roads' application in Minneapolis, sometimes our customers simply want to jack pipe. What may be lacking in equipment capability in this story is made up for with a rich history about Minneapolis's sewer systems.

VMT guidance system aids pipejack record for the southern hemisphere

McConnell Dowell Corporation Limited recently announced the successful completion of the Pringle Hill Pipejack which forms part of the construction work on the Northern Pipeline Interconnector project being undertaken by the Northern Network Alliance (NNA) in South East Queensland, Australia. The NNA consists of LinkWater Projects, McConnell Dowell, Abigroup and KBR.

AXEO Brumath completes largest pipe lining project in France to date

Near the city of Lille in the north of France four kilometres of sewer drains were rehabilitated. For this purpose UV-light curing pipe liners DN 600 to DN 1200 made by RELINEEUROPE where used. An unprecedented project in France to date.

Water transfer pipeline utilises multiple tunneling technologies including EPB

As part of a £125 million project being undertaken by United Utilities known as the West East Link Main (WELM) pipeline, Tunnel Engineering Services (UK) Ltd recently provided a number of tunnelling machines for the completion of various tunnelling sections of the work, working in varying ground conditions and final pipeline diameters. Standard tunnelling and trenchless installations were used for the completion of the tunnelled works.

Always a Winner with HOBAS CC-GRP - Microtunneling HOBAS Jacking Pipes for a Combined Sewage Collector in France

Only shortly after receiving the renowned international No-Dig Award from the ISTT (International Society for Trenchless Technology) at the No-Dig fair in Berlin for the best project 2010, HOBAS has come up trumps at the VST (Ville Sans Tranchée), No-Dig trade fair, in France for supplying pipes for the best construction site 2010. The project awarded by the FSTT (French Society for Trenchless Technology) comprised 1340 m of De (external diameter) 1940 mm pipes installed by microtunneling for a combined sewage collector with a total capacity of 3300 m³ and was implemented by the city Rennes in France.

Fully managing and utilising sewer capacity minimises flood risk

For the past decade or more the world has been arguing over the development and effects of global warming and its influence on the weather. Whatever these arguments it has become obvious that in many parts of the world rainfall patterns have changed significantly. In many instances these changes have manifested themselves as more concentrated, localised storms resulting in increasing occurrences of widespread flash flooding.

Replacement of valves in the gate valve house of the Schwammenauel dam and hydropower station

The Rur dam with the Schwammenauel hydropower station is located in the Nordeifel mountains near the city of Heimbach. With its storage volume of 203 million m³ it is one of Germany's largest dams. After more than 65 years of service, the valves at the bottom outlet had to be replaced. The old plunger valves were replaced by hollow jet valves with a much higher capacity.

Recycled and reutilised heat energy from sewer flows aids carbon reduction fight

For more than a decade now world governments have been pressing industry, utilities and the general public to be more aware of energy usage and to play their part in the reduction of carbon emissions which are deemed crucial in the fight against the global warming phenomenon currently afflicting the planet. To date, much of the effort towards carbon reduction has been to reduce the use of fossil fuels and to increase the application of renewable carbon-free energy sources such as wind and wave.

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.

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.

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.

Demo Success Launches

MTS vacuum excavation in Ireland

Zurich Rests on HOBAS

HOBAS Pipes as Auxiliary Static Support and Drainage System for the new Intra-Urban Train Tunnel in CH

An Overview of Jacked Structure Techniques - Part 2

Part 2 describes some of the new developments which open up a wider range of applications.

Robbins EPBs undercut Downtown Zhengzhou

Dual TBMs hollow out New Metro under Low Cover

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.

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.

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.

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.

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.

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.

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.