News and Articles
Oct 16, 2007
News
Award winning new sewer sealing gel development
In support of Wessex Water’s Sustainable Sewer Renovation Programme, De Neef UK and Sdi-unistride (in association with Wessex Engineering & Construction Services [WECS]) have announced the latest generation of pipe joint injection sealing gels, SewerSeal JF.
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Oct 15, 2007
News
Sweeter smell of success
An environmentally friendly project by Southern Water that uses only natural elements like bark, wood chips, seaweed and seashells lining water-filled tanks, is reducing the smell generated by wastewater treatment works.
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Oct 12, 2007
Article
HSP ? Herrenknecht Separation Plants: separation plants for microtunnelling, pipe jacking and associated applications
In the past, it has been proven time and time again that separation is a vital and sensitive integrative module in the use of tunnel boring machines with hydraulic slurry systems. The separation plant separates the slurry suspension components – solids and liquid – in order to re-provide the slurry circuit with the supporting medium and to make the separated solids disposable. Hydraulic transportation is, however, limited by the concentration of the solids and by grain size. Only an efficient separation can guarantee high performance rates. Insufficient separation obligatorily leads to difficulties regarding the removal of the material from the tunnel face to the separation plant above ground, ensuing downtimes and reduced output.
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Oct 10, 2007
News
West Ham to benefit from Thames Water’s largest new sewer scheme
Thames Water will soon begin work on its most ambitious new scheme to protect Londoners from repeated sewer flooding. The £64m scheme, which is planned for West Ham, will help protect hundreds of homes and businesses from floods like those seen in July.
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Oct 08, 2007
News
Northwest Chapter to Celebrate its 10th Annual Trenchless Technology Symposium in Calgary
The NASTT-Northwest (NASTT-NW) Chapter is celebrating the tenth anniversary of its Alberta Trenchless Technology Symposium, Nov. 15, at the Coast Plaza Hotel and Conference Centre in Calgary, Alberta, Canada. The Calgary section of the NASTT-NW Chapter is organizing the event.
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Oct 05, 2007
Article
Stress corrosion cracking of polyethylene - practical examples of steel pipe coatings
This paper describes various forms of stress corrosion cracking in polyethylene and discusses them on the basis of practical examples of polyethylene steel pipe coatings. The study was made possible by targeted localization of coating holidays using various methods of cathodic corrosion protection (CCP) and the following subsequent examinations of the damages and especially the change of material properties.
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Oct 04, 2007
News
Robbins TBM a repeat record-breaker
A Robbins 7.2 m (23.6 ft) diameter TBM operating on the remote Kárahnjúkar Hydroelectric Project in Iceland has entered new territory. The machine, operated by contractor Impregilo SpA, beat its own world record for the second time when it bored 115.7 m (380 ft) in 24 hours on August 25, 2007. It then set another record in its size class of 7 to 8 m (23 to 26 ft) by boring 428.8 m (1,400 ft) in one week! The previous record was also held by a Robbins TBM that excavated the TARP Project in Chicago, Illinois, USA.
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Oct 02, 2007
News
Insituform ready to respond to global water crisis
Industry survey cites years of neglect and underinvestment driving “Tidal Wave of Demand” for water infrastructure technology
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Sep 28, 2007
Article
1500 mm diameter main sewer line renovated under sports ground - Use of the Rib Loc Rotaloc spiral wound liner system
A 1500 mm diameter main sewer line in the town of Tiel in the Netherlands was renovated along a length of 626 m by KMG Benelux B.V. using the Rib Loc Rotaloc spiral wound liner system. The location of the pipe beneath a soccer pitch, the length, dimension and condition of the pipe combined to produce an unusual challenge, which was successfully mastered using the Rotaloc method. Advantages of the SWO liner system, such as high static load-bearing capacity, uniformly high quality of the prefabricated liner material, the avoidance of cost-intensive open cut activities, rapid installation, relatively little expenditure on over-pumping and lack of styrene emissions were all positive factors in the success of this project. In recent years, the town of Tiel in the Netherlands has carried out several rehabilitation measures using the cured in place liner method. In April 2006, it issued another invitation to tender for a sewer renovation. The decision was made in favour of the Rib Loc Rotaloc method. KMG Benelux was able to beat the competition in terms of both price and technology with this special proposal.
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Sep 25, 2007
News
Grundopit - accuracy beyond doubt
TT-UK Ltd were recently approached to assist with a trenchless solution to install 110mm OD gravity lateral connections on a new sewage scheme. Site constraints included 1050mm diameter concrete rings and 600mm square manhole covers. The biscuits and lids were already installed. The proposed installation procedure was to open trench. Even though this was a rural location this caused some disruption and took approximately four days to complete an average 12m crossing. Due to the lateral having a gravity requirement the most crucial constraint was the accuracy of installation over the entire length.
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Sep 21, 2007
News
57 new trainees and cooperative education students start working with Herrenknecht
In September and October 2007, 57 young women and men start their careers doing an apprenticeship or cooperative education program with Herrenknecht AG. Currently, Herrenknecht trains a total of 137 junior employees. Compared with last year, this represents an increase of more than 20 %. For Herrenknecht, recruiting trainees and cooperative education students has proven to be a reliable solution in order to shape prospective qualified labor for the industrial, technical and administrative divisions of the company. Herrenknecht offers interesting perspectives to the junior employees in an innovative and future-proof technological environment.
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Sep 20, 2007
Article
Sewer rehabilitation in Botany
The rehabilitation of large trunk sewers is rarely easy. When the sewer is a 90-year-old above ground concrete box structure with an unusual internal geometry on a horizontal curve and with major problems including leakage at moving joints and active horizontal cracks, then the task is made even harder.
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Sep 17, 2007
News
bauma China 2008 in Shanghai
The next bauma China will be held at the Shanghai New International Expo Center (SNIEC) from 25 to 28 November 2008.
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Sep 12, 2007
News
Next stop: Leicester Square!
Thames Water's Victorian mains replacement project reaches London landmark
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Sep 11, 2007
Article
Improving economic efficiency
Due to the constant increase of legal and operational requirements, the cleaning of private and public drain and sewer systems is a special challenge for network operators. The operation of drain and sewer systems can be economically optimised by demand- and condition-oriented cleaning strategies using computerised support.
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Sep 10, 2007
News
Ditch Witch drill pipe offers unique advantages
The Ditch Witch® organization manufactures one of the most extensive selections of horizontal directional drilling (HDD) equipment in the underground construction industry, from the small and maneuverable JT520 to the powerful, long-range JT8020. They are the only equipment manufacturer that also produces machines used to create the underground bores through which utility pipe is pulled.
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Sep 07, 2007
Article
Bonded joining in sewer and wastewater engineering using thermoplastics
In order to build a permanently operational sewer and waste-water system with a long service life, as in gas and water supply, it is necessary to not only select the appropriate materials and processes but also use optimum methods of pipe connection, i.e. joining. Such pipe connection methods include welding to create a permanent bond, an approach that has been used successfully in the field of PE and PP thermoplastics for many decades. The chief processes used are heated-tool butt welding and electrofusion. These methods of joining are processes which are recognised and practised worldwide in accordance with standardised procedures for welding, application, quality control and testing. They provide a documented secure and permanent method of connecting components in sewer construction and sewer repair/rehabilitation. That ensures a high level of reliability and a secure investment for the operators of municipal and industrial wastewater systems.
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Sep 04, 2007
News
Herrenknecht is building its first assembly plant in India
In spring 2008, Herrenknecht will put into operation an assembly plant for tunnelling systems and service in Chennai (eastern coast of South India). In a first step, the 100% Herrenknecht subsidiary “Herrenknecht India Pvt. Ltd.” will have modern assembly, steel production and storage capacities covering an area of 40,000 square meters. The investment amounts to 6 million EUR. India is a key market for mechanized tunnelling in the future.
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Sep 03, 2007
News
Borouge corrosion-free pipe solution aids water supply in Shanghai - No-dig technique saves 400 trees and minimises disruption to residents
Highly-durable PE100 water pipes from Borouge, a leading provider of innovative, value creating plastics solutions, have helped to supply safe, clean drinking water for residents of Pudong in Shanghai. The use of pipes produced with BorSafe® HE3490-LS is a long-lasting alternative to the previous high-maintenance leaking iron pipe network. According to the United Nations, water conservation is one of the most urgent global challenges facing society today.
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Aug 29, 2007
News
Retractable Robbins TBM will burrow under Manhattan
A uniquely designed Main Beam TBM is set to bore in the densely urban environment of New York City, USA. Assembly of the 6.7 m (22.0 ft) diameter Robbins TBM was finished on July 27, 2007 in Robbins' Austintown, Ohio, USA manufacturing facility. The machine will be used for two sections of rail tunnel totaling 12.5 km (7.7 mi) for the Dragados / Judlau JV beginning in October 2007.
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Aug 27, 2007
Article
Verification of the integrity of existing pipeline systems
In the last 50 years many pipeline systems for the transport of oil products were constructed. Due to the developments in the global oil market there have been a lot of changes in ownership of pipeline systems and the current state of the pipeline systems have to be evaluated.
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Aug 24, 2007
News
The Boys from the Brown Stuff - BBC documentary lifts the lid on life in the sewers
"London: home to more than seven million people, producing over 2,800 million litres of waste every day. One flush, and just like magic, it disappears, out of sight and out of mind, but hidden beneath our streets is a subterranean wonderland where all our sewage ends up. "This is the world of the flushers. "
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Aug 22, 2007
News
WESTT Regional No-Dig Conference Slated for October 1-3 in Reno
The Western Society for Trenchless Technology (WESTT) is proud to present its third annual Western Regional No-Dig Conference and Exhibition, October 1-3, in Reno, Nevada. Attendees will enjoy the benefits of a national conference program in a smaller forum with a personalized touch.
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Aug 21, 2007
News
Insituform to exhibit latest sewer and water products and technologies at WEFTEC 2007
Insituform®’s cured-in-place-pipe (CIPP) and Composite Pipe™ (CP) products allow customers to rehabilitate small, medium or large diameter pipes with a jointless, “pipe-within-a-pipe” solution. Over 13,500 miles of Insituform®’s durable and cost-effective CIPP solutions have been installed to rehabilitate the world’s deteriorating infrastructure.
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Aug 17, 2007
Article
Korean tunnel success for new Sandvik rock tool
Korean contractor Sung Bo Development is achieving a 30% increased life span of its Sandvik Alpha tool system and eliminated rod 'gooseneck' breakages on highway tunnel drilling through difficult, fragmented rock on the Pyeoungtak-Eumsung Highway 40 section 7 contract.
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