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ISTT No-Dig São Paulo 2012 Report

From 12-14 November the ISTT celebrated its 30th conference and exhibition with the Brazilian trenchless Affiliated Society in the metropolitan city of São Paulo, Brazil.

This conference was a monumental occasion for both the Brazilian Society (ABRATT) and the ISTT, because it was the first ever ISTT No-Dig show held in South America.

The conference was an outstanding success, drawing a large number of both local and international delegates. Over a three-day period, participants had the opportunity to update their knowledge on latest equipment innovations in the global market, and attend presentations on new studies, procedures, and technologies presented by members of the business and scientific communities from across the globe.

Spreading trenchless knowledge

Proceeding No-Dig São Paulo, delegates could attend a two-day course in directional drilling (HDD), which was conducted by Petrobras engineers.

Additionally, the conference included five special lectures and a round table comprised of representatives from several different continents who debated trenchless projects and practices.

The exhibition hall

Over the three days the exhibition hall was a constant place of activity, with approximately one hundred stands. Visitors had the opportunity to learn more about latest equipment and material innovations from large international manufacturers, as well as key foreign and domestic service providers.

Platinum Sponsors of the event were Colli Drill Brasil, Conexão Trading, Vermeer Corporation and Petrobras.

The ISTT Awards were presented at the Gala Dinner, which was hosted at the beautiful Villa Bisutti Tenerife – an excellent venue where delegates socialised and enjoyed great Brazilian food and entertainment.

Honouring the industry’s best

The 2012 ISTT awards were announced at the 30th ISTT No-Dig, held from 12-14 November in São Paulo, Brazil, with No-Dig awards given out for best project, best academic research, best student and two best product awards.

Project Award

South African company Trenchless Technologies took out the best project award for its rehabilitation of two parallel sewers located in the heart of the Port Elizabeth’s business district in South Africa.

Originally designed to use the spiral wound technique throughout the project, the team soon discovered that site conditions required also using cured-in-pipe place (CIPP) and pipe bursting at certain locations.

Altogether, the project used five different trenchless techniques – spiral wound lining expanded to a close fit, spiral wound lining in-place, ambient cured-in-place pipe, UV cured-in-place pipe and pipe bursting to successfully complete the project.

The project is an excellent example of using a variety Trenchless Technology options to address unanticipated site conditions, thereby allowing the project to be completed successfully without excavation and surface disruption.

Academic Research

The best academic research award went Battelle Memorial Institute, the Louisiana Trenchless Technology Center, and Jason Consultants. The US multi-discipline team undertook the first-ever study in the US to assess the long-term performance of CIPP that had been installed up to 25 years ago. The study was commissioned by the US Environmental Protection Agency and tests were conducted on eleven properties of the liners, including flexural strength and flexural modulus. All flexural strength values exceeded ASTM minimum standards and generally fell within a narrow range.

Except for two samples, the flexural modulus values were above the ASTM minimum standard. The variation in pipe performance appears to result from variability within the liner, rather than a change over time. The study showed that the pipes appeared to be in good condition and should last their designed 50-year life and perhaps well beyond. The team further assessed the performance of CIPP liners installed in the UK, France, Germany, Australia, Japan and Singapore and developed an evaluation protocol that municipalities and other system owners can use to evaluate their systems and contribute to a common data base of experience.

Product Award

Japanese company Yasuda Engineering Co’s Milling Mole was awarded the first of the product awards. The Milling Mole is a sludge-based jacking method that is capable of cutting metal obstructions such as PC or steel piles left from previous urban developments.

The enhanced capability of the Milling Mole method to tunnel through metal obstructions greatly simplifies the construction process associated with underground urban development projects, since metal obstructions in the earth no longer force routes to be changed or expensive specialist construction processes to be carried out.

The second product award went to Finland-based company Picote Oy Ltd for its Smart Cutter. The Smart Cutter is designed to reconnect smaller drains to the lateral after a CIPP lining.

The product offers a number of components that allow the user to match specific size and geometric conditions of the pipes, and may be powered by either a grinding machine or hand drill.

Student Award

Veronika Onderkova of the Czech Republic was awarded the student No-Dig Award for her paper titled “˜Modelling of Pipe Roofing Technology’.

The paper summarises the thesis study undertaken by Ms Onderkova to model and evaluate pipe roofing using microtunneling to rehabilitate the Jablunkov railroad tunnel in the Czech Republic.

The study used 2D Plaxis V8 (FEM) software to model and compare results of alternative rehabilitation technologies. The model calculated the bearing capacity of the retaining wall, passive earth pressures and other factors.

ISTT No-Dig 2013 – book your flights now!
No-Dig Down Under will take place in sunny Sydney, Australia, from 1−4 September 2013. The Australasian Society will welcome the ISTT to the Sydney Convention Centre for the Trenchless Technology event of the year. Read the top seven reasons why you should attend No-Dig 2013.

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