Articles
11.12.2009
Trenchless Renovation - Out of Sight, Out of Mind: Dresden, Germany, Relines Old Town Collector with Hobas NC Line®
Stadtentwässerung Dresden GmbH, a subsidiary of the Saxon State Capital Dresden and GELSENWASSER AG, is responsible for the collection and treatment of wastewater. The area at the Elbe River counts 500.000 inhabitants who consume an average of 100 l water per day. Including stormwater, around 60 million m3 of wastewater are collected and then treated in the Dresden-Kaditz treatment plant per year. These are in other words 120.000 m3 of wastewater on a dry day. A quick and safe discharge of this big quantity of water requires a well functioning sewer system. Parts of the network are, however, over 100 years old and constantly need to be repaired and renovated. Since 1990 Stadtentwässerung Dresden GmbH has invested 575 million Euros in the renovation and expansion of the sewer network as well as water treatment plants.
mehr26.11.2009
Milestone in guided auger boring
A novel steering technology from Bohrtec, extending the range of applications for guided auger boring techniques, has been used for the first time on two pipe eating projects in Germany.
mehr13.11.2009
With or without Trench - always with HOBAS®: Renovation of a Sewer Main in Strasbourg, FR
The reconstruction of the sewer main for the Rhine Harbour of Strasbourg was a model example of the complementary nature of open-dig and trenchless installation. Where the working space would have been insufficient, rehabilitation was carried out by sliplining prefabricated GRP NC Line panels. Wherever a trench was feasible, CC-GRP Pipes were laid in an excavated trench which was prepared in accordance with pipe installation standards and as the depth required.
mehr29.10.2009
Hobas SewerLine® Pipes Help Protect Hawaii?s Beaches, US
Aloha Hobas®! Tourism is the engine of Hawaii’s economy and its famous beaches are a top attraction. A break in an old sewer line could close the favorite beaches, Waikiki and Ala Moana, and contamination might attack the fragile coral reef and other marine life in the area. Small wonder that the city and county officials work so hard to protect the environment.
mehr23.10.2009
Blast from the past: A history of pipe bursting
As much of the world’s underground infrastructure has reached the end of its design life, many cities are aware that they have a major problem lurking under their streets. Some of these cities have been compelled to take action. Many others are not doing much until there is no other alternative.
mehr28.09.2009
Isle of Grain Pipe Jacking: HOBAS© CC-GRP Pipes for Liquefied Gas
In addressing future demands for alternative supplies of gas, the UK has seen the construction of a number of new terminals for the importation of liquefied natural gas (LNG) one of which is sited at the Isle of Grain on the Thames estuary. For the most economic transportation of the gas it is cooled to achieve this liquid state and needs to go through a process of regasification for use in the UK gas grid. The latter process is no more than raising its temperature back to ambient. This requires heat and at the Isle of Grain this is being supplied by utilizing surplus heat from the existing Isle of Grain power station in the form of hot water. A twin pipeline system connects the station’s two plants, part of which is installed inside tunnels using HOBAS CC-GRP jacking pipes.
mehr15.09.2009
15,000th Ring Marks Milestone for Robbins Double Shield
Long-distance TBM nears completion of China's Pinglu Tunnel: Spanning over 10 years and 200 km (124 mi) of tunnel, China’s Yellow River Water Diversion Project can only be called epic. The latest installment of the extensive scheme, known as the Pinglu Tunnel, will be one of the world’s longest tunnels excavated with a single TBM. On July 9, 2009, the 4.8 m (15.7 ft) diameter Robbins Double Shield TBM boring the waterway set ring no. 15,000, making the tunnel nearly three quarters complete.
mehr17.08.2009
Records Rally for Robbins EPBs in Guangzhou
Two TBMs achieve Best Project Rates 16 Times Over: After seven months of tunneling and more than 16 project records, two Robbins EPBs are pushing far ahead of schedule. The 6.3 m (20.5 ft) diameter machines for China's Guangzhou Metro are more than a month early and on track for breakthroughs in August and October 2009, respectively.
mehr25.06.2009
Survey on the Condition of Road Gully Systems in Germany (Part 2)
Having introduced the approach to the survey on the state of the road gully systems in Germany, the data pool, as well as project-specific key figures in the first part of this publication, the subsequent second part includes the results of the batteries of questions concerning cleaning, inspection, leak tightness testing, requirement for rehabilitation and rehabilitation costs, as well as a summary of all results of the survey.
mehr24.06.2009
Almost Without a Trace
Microtunneling HOBAS® CC-GRP Pipes in Rome, Italy: Farnesina is one of Rome’s central quarters and is situated on the right bank of the Tiber River. With La Farnesina as headquarter of the Italian Foreign Ministry the area is home to the ancient Milvio Bridge (109 a.c.), two meaningful sports facilities, namely the Olympic stadium and the Foro Italico, but also the junction of the 2 most important roads: The Cassia and the Flaminia.
mehr28.05.2009
MDPCL successfully complete unique pipe bursting project using the Grundoburst 400S
A recent CCTV survey identified that the cause of repeat sewer blockages at Paget Road, Barry was caused by numerous grade 4 defects in the nearby 300 mm diameter public sewer. To make matters worse, the location of the sewer being so close to properties meant that traditional open cut techniques of pipe replacement was not an option. MDPCL were asked to find the quickest, least disruptive solution to the problem.
mehr26.05.2009
Construction of new supply lines in Venice
The narrow lanes and numerous bridges in the lagoon city of Venice presented the entire construction team with a real challenge when building pipelines to supply water and extinguish fires. Since open installation was to be avoided where possible to prevent damage to roads, the SLM® RCplus pipes with protective coating were mainly installed using the black box method.
mehr25.05.2009
All Show and All Substance in Tilburg, NL
Efficient Relining with HOBAS NC Line® Wins No Dig Award: The sewer in Sint Josephstraat, The Netherlands, is part of the Tilburg main sewer and is an important link in the system of the waste water treatment plant and the rainwater overflow at the Wilhelmina Channel. Designed in 1927 and installed one year later, it consists of a concrete base with a masonry arch. Its transversal section is that of a reversed egg profile, with 1.90 m maximal width and 2.15 m height.
mehr06.05.2009
Grundomat success in Oman
Oman Fiber Optic Company was formed in 1996 by a group of Omani & Emirati (UAE) investors and commenced cable production in early 1999. Situated in Muscat, the capital of the Sultanate of Oman, OFO uses state of the art technology to draw fiber and manufacture world-class fiber cable products. OFO manufactures cables for long haul backbone communication links, LAN networks, video transmission & Cable TV, traffic signalling, FTTH solutions, security systems, defence and specialty applications.
mehr30.04.2009
Survey on the Condition of Road Gully Systems in Germany (Part 1)
Since the second half of the 19th century, waste water systems are built and run systematically in Germany according to the respective engineering rules to be considered. In the sense of the Water Resources Act, they serve for draining of sewage, that is to say, for collecting, draining off, treating, discharging, seepage, and for the land treatment of waste water. From an economic point of view, drain and sewer systems as "systems for collecting and discharging sewage in the form of waste water and/or surface water" represent the most important part. In compliance with DIN EN 752 [1], they include the area where the sewage leaves a building or a roof drain, or where it enters a road gully, up to the point where the wastewater is discharged into a wastewater treatment plant or receiving water. According to this definition, a drain and sewer system consists of three parts, namely the sewer system, the drain system, and the road drainage.
mehr27.04.2009
Toulouse builds on HOBAS®
Cancéropôle realized with CC-GRP stormwater system, FR - Cancéropôle, an exceptional center of excellence dedicated to cancer research and treatment is erected on the grounds devastated by a chemical explosion on September 21st 2001. The stormwater network of such is realized with HOBAS CC-GRP Pipe Systems.
mehr03.04.2009
Liquid Soil - A Technical Challenge
In the last decades there have been many innovations in the field of plastic pipe systems, especially the bauku GmbH had a strong share with developments like the PROFILEEN - safe or the PROFILEEN - drain clean. However in the field of installation methods and installation materials for sewer pipes there has been no real movement until lately the expression "liquid soil" played an important role in more and more symposiums and expert articles. If someone has a closer look at the definition of this word, it is quite clear that this is not a standardized expression for a certain kind of product and that the products of different suppliers have also a much different product behavior. The bauku GmbH faced this challenge and made a first experience in the static design for this application and the practical use at the job site. As such a pioneer work requires a close connection between the pipe producer and the supplier of the liquid soil, the company rss was chosen for the project.
mehr19.03.2009
Green Line for Green Energy
The Maggia valley in Swiss Tessin is a renowned tourist magnet. Situated in the far south of Switzerland at the Italian border, the region enjoys a warm southern climate. The beautiful scenery and culinary delicacies add to the appeal and yearly draw thousands of visitors from home and abroad to the Maggia and the Lake Maggiore.
mehr12.03.2009
Repairing sewers without excavation
When repairing sewers, the UK based company OnSite’s nodig solutions can often use manholes rather than digging up roads: Until about thirty years ago, once a sewer was built, there was no way of inspecting the inside. But with the emergence of closed-circuit television, the poor condition of many sewers was revealed. Pipes were often cracked and groundwater infiltration was increasing the volume of sewage at the pumping stations. This led to an overload of the system, with sewage overflowing into watercourses. Treatment plants were working unnecessarily to process the additional volume and sometimes sewage seeped directly into the environment through the cracks.
mehr25.02.2009
The revised global O-Ring standard - background & explanations
ISO 3601, the standard covering O-Rings, the most commonly used seal, has been revised to meet American, European, as well as Asian needs. ISO 3601 consolidates the long established AS 568B inch standard with the existing metric ISO 3601 and importantly, as it retains its original designation, means modification of documentation may not be required.
mehr16.02.2009
Rehabilitation of a combined sewage collector within a groundwater protection area by application of the GIPP method
The Entsorgungsverband Saar (EVS) is an association of various municipalities within the Saarland (federal state located in South-West Germany) responsible for the waste water collection and disposal within this specific area. The regional sewer network, which amounts to more than 1000 km, is subject to ongoing TV-inspection and evaluation. The main collector number 1.3 "Heimlinger Tal", located in the northern Saarland, already made part of this survey.
mehr02.02.2009
SABIC Innovative Plastics' Resins Optimize Water Valves with Design Freedom, High Performance and Long Life
BERGEN OP ZOOM, The Netherlands – Because of their exposure to static or fluctuating pressure, high temperatures and various chemicals, water valves have traditionally been made from metals such as brass. However, today's engineering thermoplastics can replace metal, delivering not only high performance but also the benefit of enhanced design freedom. SABIC Innovative Plastics' portfolio of advanced specialty materials, combined with the scientific expertise of its Fluid Engineering Center of Excellence in Bergen op Zoom, The Netherlands, offers customers new choices for water valves that can ensure a high level of efficiency, durability and performance.
mehr15.01.2009
As long as the Yangtze?
Yiwu is a city of around 1 million people in the greater area of the Yangtze delta. It was founded during the Qin dynasty around 200 B.C. very close to Hangzhou, the capital of the province Zhejiang. As trading area of Shanghai it is today known as one of the most influential economic areas in China.
mehr06.01.2009
New Pig for Gas Pipeline Crack Inspections - Enhancements Derived from 5 Years' Operational Experience
This paper will summarize the evolution of the EMAT technology since GE's initial product launch in 2002. A key focus of this paper will be outlining several tool and analysis enhancements that result from the evaluation of over a 1000kms of EmatScan™ CD pipeline inspection and 250 field confirmations. These tool and analysis enhancements are now incorporated in GE's new 30 inch Third Generation EmatScan (Gen III EMAT) In Line Inspection (ILI) tool.
mehr10.12.2008
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.
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