News und Artikel
09.07.2008
Fachartikel
Giant gaskets seal underground highway tunnel
In Madrid, Spain, an underground highway tunnel will help reduce traffic congestion. Like moles, two massive tunnel boring machines have inched their way forward, leaving a walled tunnel behind. Gaskets from Trelleborg provide a waterproof seal between the massive tunnel ring segments.
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07.07.2008
News
Big-Boy arrives in South Africa
Trenchless Technologies CC, based in Johannesburg, was founded in 1991 and has been the TERRA distributor in Southern Africa since 1993. They undertake several kilometres of pipe and cable laying using HDD as well as some 30 kilometres of trenchless rehabilitation works annually.
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03.07.2008
News
Insituform wins millions of Dollars in contracts to rehabilitate drinking water lines
New contracts for trenchless rehabilitation of potable water lines by Insituform Technologies, Inc. demonstrate that the company is developing the kind of dynamic market for solutions in the drinking water industry now that it created 35 years ago in the sewer and pipeline industries, the company announced today.
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01.07.2008
News
150 years on from the 'Great Stink' - London needs sewers fit for the 21st Century
The River Thames is one of the cleanest metropolitan rivers in the world, home to 120 species of fish and aquatic life. However, without the vision of the Victorians, who designed the sewer system that still serves London today, things would have been so much different. Now, 150 years on, the next phase of the evolution of the sewers is about to begin.
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27.06.2008
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Modelling of HDD pipeline frictional resistance, and extruded microtunnelling linings for long-distance 'cable pipe' installations
The supply of power to the major centres of population must be assured to satisfy economic and social demands. Small-scale local generation plant, such as roof-mounted wind generators and solar panels, might play a part, but it is clear that large-scale electrical power generation will be required to supply the base load. The next generation of major power stations of any form (clean coal, nuclear, wind, tidal, etc.) will inevitably be built away from the major urban areas, and indeed many of the best sites are on the coast or offshore, often in very remote locations. Long transmission lines are thus inevitable, and are an indispensable component of a sustainable electricity supply in the 21st century. It is considered desirable to dispense with pylon-mounted overhead cables for electricity distribution and thus economic burial methods must be sought.
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26.06.2008
News
1000mm pipe cutter from the TT Group
The new roller blade is not exactly an everyday contractor’s tool.
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23.06.2008
News
London's desalination plant clears final hurdle
Mayor’s decision to drop court action a ‘victory for common sense’, says Owens
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20.06.2008
News
Poland drives HOBAS pipes round the bend
An impressive pipe project in Poland's capital Warsaw is expected to be completed mid summer 2008: To relieve the down-town sewer collector and to transport wastewater to the new treatment plant "Czajka", astounding 3.3 km large diameter (up to OD 2160 mm) HOBAS CC-GRP Jacking Pipes are installed by remote controlled jacking (microtunneling) and were literally driven around several bends.
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19.06.2008
Fachartikel
The structural design of large non-circular GRP prefabricated linings
As happened in the UK, 20 years ago, when the WRc started to work on the Sewer Rehabilitation Manual (SRM), in 1999 the French ministry of Public Works decided to launch a National Project of Research and experimentation program called RERAU, covering the “Rehabilitation of Urban Network Sewers” in order to increase the knowledge in regard to the area of sewer system rehabilitation.
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18.06.2008
News
Insituform awarded $4.25 million contract to rehabilitate water main line on New York City's Madison Avenue
Insituform Technologies, Inc. announced that it has been awarded a $4.25 million contract to rehabilitate a century-old water main line running beneath Madison Avenue in New York City, one of the busiest streets in the world.
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16.06.2008
News
Echo in the mountain: Sonar technology for application in tunnel excavation
Technology Transfer Award 2008 for the detection of disturbance zones during tunnel construction
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12.06.2008
News
Colorado School of Mines Offers Tunnel Short Course
One-of-a-Kind Course Set for September 10-12
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09.06.2008
News
Trelleborg increases presence in the market for pipe seals
Acquires US company NPC Inc. with SEK 110 M in sales
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06.06.2008
News
Robbins TBM rises above water inflows in China
Deep in a sheer-walled canyon at the foot of China's Jinping Mountain, crews are working 24 hours a day to assemble a giant. The 12.4 m (40.1 ft) diameter behemoth, a Main Beam TBM manufactured by The Robbins Company, will excavate one of the country's largest hydropower projects to date.
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05.06.2008
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Trenchless sewer pipe renovation using the new tight-in-pipe method in the congested streets of the City of Dortmund, Germany
This paper introduces the Tight-in-Pipe Method. Tight-in-pipe is the term of a method for renovating sewer pipes and laterals with new, slightly smaller pipes in the same path without the need for filling the annullus between new pipe and host pipe. Deformation and misalignment can be compensated to a certain extent during pipe installation. Excavations can be abandoned almost completely when working from one manhole to the next. By this means, slight to medium deformations and misalignments are compensated, leaving circular pipes underground. The Tight-In-Pipe method is mainly used in projects for which a slight reduction of the original diameter is acceptable.Furthermore, this paper describes the application for this method on a larger project in the German City of Dortmund, 2006, where 4 sections of sewer pipe in Hertastraße had to be renovated, over a complete length 186 m. Installation with open trenches was impossible due to narrow site conditions and congested streets. Furthermore, this application method saved approximately 2/3 of the initially calculated costs had the project been carried out by open trenching. The contract was awareded to Paul SPEECK Rohrleitungs- und Tiefbau GmbH from Dortmund.
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02.06.2008
News
ScotPlant 2008 continues to prove successful for TT-UK at the Royal Showground Edinburgh
Following on from the success of 2006, TT-UK continues to increase its supply and support for all its Scottish based customers exhibiting its wide and technically advanced range of Trenchless Technology (no-dig) equipment.
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30.05.2008
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Guided Waves inspection of pipelines: experiences of Italian Institute of Welding
The article shows the experiences of the Italian Institute of Welding in inspection of above ground pipelines and road crossings using advanced diagnostic techniques, above all Guided Waves technology.
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29.05.2008
News
Ofwat recommends opening water and sewerage markets to competition
Ofwat has published the second part of its review of competition in the water and sewerage sectors. In it they recommend that contestable water and sewerage markets are opened to competition where it will benefit consumers, and describe the work they will be doing to enable this to happen.
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27.05.2008
News
Robbins TBM all wrapped up in Iceland
Tunneling at the massive Kárahnjúkar Hydroelectric Project is now complete with the recent breakthrough of a Robbins TBM at the Jökulsá Diversion Tunnel. On April 9, 2008, the 7.2 m (23.7 ft) diameter machine ended its record-setting 8.7 km (5.4 mi) long drive. The breakthrough brings to a close nearly 50 km (31 mi) of bored tunnels using three Robbins machines and spanning four years of construction.
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23.05.2008
Fachartikel
Long distance (micro-) tunneling with polymer concrete
Polymer concrete Technology dates back to the early 1960’s. It was developed in order to provide corrosion resistant conduits especially for the chemical industry. Municipalities in Europe started around the late 1970’s experiencing that cementitious concrete products can’t meet the service lifetime expectations in the corrosive sewer environment. That was the time when polymer concrete first was deployed in the municipal sewer systems.
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20.05.2008
News
Successful premiere at IFAT
S & P Consult GmbH draws positive conclusion after participating in the trade fair
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19.05.2008
News
Pipes Conference: Landmark papers expected
Some landmark papers are expected at the XIV Plastics Pipes Conference according to the organisers of the event. The conference brings together the global plastic pipe community and its many technical and commercial experts. It will be held from 22 - 24 September 2008 at the Marriott Hotel in Budapest.
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15.05.2008
News
Focus on the environment − Most successful IFAT ever
“These results mean that IFAT is the world’s biggest and most important trade fair for environmental technology and services. Its international reputation is also impressively underlined by the presence of many high-ranking government delegations from all over the world,” said Eugen Egetenmeir, Deputy Managing Director of Messe München GmbH.
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15.05.2008
Fachartikel
Behavior of over-cutting area injected by flyash surface-active agent mixture material
Lubrication can effectively reduce the needed thrust if a discrete layer of the lubricant is maintained between the pipe and the excavated soil. The lubricant must be designed to form a layer in the surrounding soil, be pressurized to overcome ground water pressure and stabilize the over-cutting area. Lubricant should fill the complete over-break void to minimize surface settlement. However, it was clarified that for a commercial lubricant to be effective, it is suggested that ingredients such as sodium and potassium be eliminated. As a result, for a lubricant to not lose its function as a support against the overburden pressure of an over-cutting area and to enable a reduction in thrust, it is necessary to develop a better quality lubricant which can overcome these problems as soon as possible. From this perspective, a lubricating material comprised of a mixture of the surface-active agent and flyash was developed. In this paper, in order to examine the characteristics and behavior of the flyash surface-active agent mixture developed for use as a lubricant, a fundamental investigation is performed.
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