Articles
24.09.2012
Sewage treatment
The Analytical Side to Compliance with Drinking Water Regulations
Two new U.S. Federal regulations went into effect in 2009 that directly impact drinking water utilities that use chemical disinfection. Specifically, the Ground Water Rule and the EPA Method 334.0 are now in place with the purpose of improving the quality of drinking water. This paper summarizes the key elements of the new regulations and describes how they affect utilities’ daily operations, plus it will provide a comparison of available technologies for monitoring and calibration equipment as they relate to the regulations.
mehr15.08.2012
Cliffsend Jacked Deck Underpass
A recently completed highway project in the United Kingdom includes a massive underpass installed by means of jacked deck construction methods. At 126 m long and with a clear span of 20m, the four-lane underpass is believed to be among the largest structures ever built using horizontal jacking methods.
mehr19.04.2012
Decision making in rehabilitation strategy forecasts
Operation, maintenance and rehabilitation of sewer networks are mainly driven by the results of CCTV inspections which build the basis for meeting numerous rehabilitation decisions each planning year. These decisions additionally take into account empirical knowledge based on experiences made in the past and the corresponding ancillary conditions whether they are internal (coming from the network operators themselves) or external (coming from the operator’s political, social or ecological environment). A sustainable rehabilitation planning requires mandatory pro-active rehabilitation planning that identifies deficits before they actually occur. This activates enormous efficiency potentials as the early realization of an upcoming rehabilitation candidate widens the applicable rehabilitation possibilities.
mehr26.03.2012
SEKISUI SPR Europe sets European record in Paris: Spirally wound at the largest diameter
When it comes to rehabilitating sewers with large nominal diameters under complex boundary conditions, the spiral-wound pipe rehabilitation technology comes into its own. This was the case in the French district of Le Pecq near Paris in October 2011, where 281 metres of a DN 3000-3300 rain water collector were rehabilitated with a DN 2750 spiral-wound pipe liner of SEKISUI SPR Europe, manufactured by its subsidiary SEKISUI Rib Loc. The rehabilitation project involved the use of the SPR™ PE spiral-wound pipe process, previously known as RIBLINE. The Le Pecq project saw a new European nominal diameter record being set for this form of spiral-wound pipe rehabilitation technology.
mehr23.02.2012
7 Times in Europe – Air Cushion Siphon of HOBAS Pipes Rehabilitates Sewage System
The sewers of Pforzheim in Germany are for some part over 100 years old. It comes as no surprise that these no longer suit today’s requirements and urgently need to be rehabilitated. The majority of newly installed pipes has been jacked: A rather infrequent and demanding project was in this case the installation of an air cushion inverted siphon beneath two rivers.
mehr18.01.2012
Dalrod Utilises Brawoliner to Complete a Challenging Renovation Project Near Ely Cathedral
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.
mehr04.01.2012
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.
mehr15.12.2011
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.
mehr02.12.2011
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.
mehr07.11.2011
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.
mehr19.10.2011
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.
mehr20.09.2011
Construction site, general
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.
mehr24.08.2011
Construction site, general
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.
mehr06.06.2011
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.
mehr16.05.2011
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.
mehr05.04.2011
New concepts and special solutions
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.
mehr17.03.2011
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.
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