North American Special - Trenchless International

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herrenknecht AG | utility tunnellinG | t r A ffic tunnellinG u SA lOnG DiStAnce tunnellinG in the uSA SetS neW StAnDArDS. POrtlA n D | u SA PROJECT DATA M-1122M, AVND2000AB Diameter: 2,605mm Max. torque: 780kNm Tunnel length: 9 drives, totaling 2,393m Geology: sand, gravel, loam CONTRACTOR KBB JV (Bilfinger Berger AG, Kiewit Construction Co.) S-348, Mixshield KBB JV Diameter: 7,700mm (Bilfinger Berger AG, Driving power: 1,000kW Kiewit Construction Tunnel length: Co.) 6,189m + 2,721m Geology: sand, silt, gravel with stones and stone blocks An impressive record result in long distance tunnelling: In scarcely 1.5 months, the Herrenknecht Micromachine AVND2000AB achieved a U.S. record in Portland (Oregon). For a large wastewater project, the “Combined Sewer Overflow System” on the Willamette River, the construction site team succeeded in precisely and rapidly producing a 938 meters long microtunnel without intermediate shaft which is the longest ever excavated by a machine. In times of heavy rainfall, the “Combined Sewer Overflow System” on the western and eastern banks of the river, will temporarily store the city’s mixed water and then channel it to a treatment plant in a controlled way. In order to connect the existing wastewater lines to the new storage tunnel, a Herrenknecht Micromachine is boring a total of nine partial sections with an overall length of 2,393 meters through sand, gravel and loam. Although iron rail spikes and timber dock piles in the underground made tunnelling more difficult, the machine achieved the new milestone on the “Outfall 46” section. Until completion in 2011, a total of four Herrenknecht tunnelling machines will have been in operation. Among them, the S-348 Mixshield (Ø 7.7m) which is excavating an almost nine kilometer long stretch of the new storage tunnel on the eastern river bank. Thanks to best weekly performances of up to 160 meters, 3,732 meters of tunnel could already be completed by January 2009. This means, that both machine and environmental protection are moving forward in Portland. Herrenknecht AG D-77963 Schwanau Phone + 49 7824 302-0 Fax + 49 7824 3403 marketing@herrenknecht.com Herrenknecht Corporation 98390 Sumner, USA Phone +1 253 447 2335 Fax +1 253 863-9397 joconnell@herrenknecht-usa.com www.herrenknecht.com
Dec Downey Istt Chairman Trenchless Middle East, organised recently in Dubai by Westrade Group, was a great success attracting almost 70 participating companies and a host of visitors from 32 countries. A large group of German companies, led by GSTT Chairman Prof Jens Hoelterhoff and Secretary Klaus Beyer, participated and we were once again generously entertained by the German Consul General at the residence. We enjoyed the participation of some 30 delegates in our Trenchless Masterclass and the lively discussions spilled over into the breaks, signalling that the event formula is working and, with experience, will improve even more. Westrade’s performance in Dubai hopefully gives us just a hint of what they will be able to achieve for ISTT in Singapore in 2010. This weekend I am travelling to Hong Kong to promote the objectives of ISTT by speaking at the International Conference on Utility Management and Safety, many thanks to our HKSTT colleagues for securing this invitation. In preparation I have spent some time thinking through ideas about the contribution our technologies make to 21st Century pipeline construction and rehabilitation. We often speak about the challenges of ageing underground infrastructure and the benefits of our technologies in addressing urban renewal with minimum disruption, but there is much more to say about the contribution of Trenchless Technology to the maintenance of existing networks and the construction of pipelines for the future. It seems to me that many of today’s problems can be attributed as much to the historic choices of materials and methodology available at the time of construction as to time-related deterioration and shortcomings in construction supervision. With the clarity of hindsight, we can identify some of our past mistakes and build on this hard-earned understanding to do better for our communities, and the trenchless option has so much to offer in these initiatives. Trenchless methods facilitate construction with less joints or better-made joints, with potentially more durable materials and with less reliance on hard-to-supervise skills in the darker corners of the underground. Today we have improved geotechnical exploration and utility location skills, though further development is required. The practices of microtunnelling, pipe ramming and horizontal directional drilling have improved substantially. Modern pipe materials properly installed by these methods must surely offer sustainable solutions to the challenge. We have an increasing tool box of technologies to address ageing pipelines and provide lasting solutions to these problems. While condition assessment and service connection reinstatement remain challenging, many of the rehabilitation techniques we use have been tried and tested over a considerable length of time and our retrospective evaluations can underpin service life predictions. New techniques continue to evolve, along with our understanding of the pipe-soil interface. We have high hopes for emerging structural spray and reinforced linings. Quality of construction work and safety of installation crews are very important facets of our business. In my Hong Kong presentation I hope to show that our industry has placed due emphasis on these aspects, which will extend the appeal of our skills to a larger audience of professionals in a marketplace where Trenchless Technology is an essential consideration. FROM the CHAIRMAN's desk April 2009 - Trenchless International 1
Page 1: In this issue | Canada | USA | Japa
Page 5 and 6: EXECUTIVE DIRECTOR'S REPORT John He
Page 7 and 8: Pipes & People Prime Horizontal pip
Page 9 and 10: Trenchless in Toronto The 2009 Inte
Page 11 and 12: Events ISTT International No Dig 20
Page 13 and 14: projects April 2009 - Trenchless In
Page 15 and 16: Insertion of the liner takes about
Page 17 and 18: Alleviating flooding in Ashbourne S
Page 19 and 20: obotics April 2009 - Trenchless Int
Page 21 and 22: Risky business by Roderick Lovely a
Page 23 and 24: Deterioration Factors Distress Indi
Page 25 and 26: environment Supplying the community
Page 27 and 28: Record SWP down under Interflow, an
Page 29 and 30: north america April 2009 - Trenchle
Page 31 and 32: north america is a biaxial stress,
Page 33 and 34: disc cutter heads to work through t
Page 35 and 36: “We had a very tight window to ge
Page 37 and 38: Undersea HDD rescue in Saudi Arabia
Page 39 and 40: ADVERTISERS INDEX SUBSCRIPTION FORM

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