http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 14.63Change: -0.07
R/$ = 10.58Change: -0.04
Au 1286.11 $/ozChange: 2.74
Pt 1406.50 $/ozChange: 3.50
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Nelson Mandela 1918 - 2013   Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science & Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Suppliers Directory Research Jobs Announcements Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Dec 13, 2007

Gautrain to start tunnelling with ‘Imbokodo' machine in January

Back
Johannesburg|Pretoria|Gautrain|Rosebank|Germany|South Africa|Gautrain|Park Station|Electricity|Gautrain|Gautrain|Jack Van Der Merwe|Mbazima Shilowa|R300
johannesburg|pretoria|gautrain-company|rosebank|germany|south-africa|gautrain-facility|park-station|electricity|gautrain-organization|gautrain|jack-van-der-merwe|mbazima-shilowa|r300
© Reuse this Tunnelling its way 3-km from Rosebank station to Park station in central Johannesburg, will be the Gautrain's very own R300-million tunnel boring machine (TBM) - ‘Imbokodo' - which was designed and custom built in Germany, by Herrenknecht engineers, specifically to cope with the complex underground geological conditions south of Rosebank.

Set to start tunnelling in January 2008, the 145-m long, 885 t Imbokodo, with its 13 gantry trailers, is expected to take 14 months to tunnel the 3-km, and will work 24 hours a day, seven days a week.

‘Imbokodo' (literally, ‘the hard rock that grinds') was the name chosen for South Africa's TBM, in the spirit of the women who marched to Pretoria in 1956 singing "Wathina abafazi, wathina imbokodo" ("If you strike a woman, you strike a rock").

Traditionally, tunnel boring cannot start until local people have chosen a suitable name for the TBM, which, according to custom, and to signal good luck for the project ahead, must be a woman's name.

Gautrain Management Agency CEO Jack van der Merwe said that the name Imbokodo was a symbol of South Africa's heritage of willpower in its drive to overcome obstacles.

The TBM, which uses electricity as its power source, took 12 months to design and build. At the front of the machine is a rotating cutting wheel, which excavates the ground, and behind the wheel is a chamber where the excavated material accumulates, before being extracted by a pressure relief discharge system called a ‘screw conveyor'. Excavated soil is then transported on a conveyor belt back up to the Rosebank south shaft, where it will be picked up by tipper trucks.

Urban tunnelling requires that the ground surface is left undisturbed, particularly since it has to be done below deep infrastructure foundations. A computerised guidance monitoring system is used to steer the machine accurately underground.

The trenchless closed construction method has its advantages, and life above ground will continue with no economic losses, no road diversions and traffic disruptions. Noise pollution and dust can be avoided, and no groundwater lowering is necessary. Construction is largely independent of weather conditions.

Once the tunnel linking Rosebank and Park stations is complete, it is unclear what will become of Imbokodo - it could be left underground once its work is finished, or, if economically feasible, it could be made available for use on another project elsewhere in the world.

As the machine cannot move backwards, getting it out from underground could prove very costly, and it is a possibility that "once she has submerged into the belly of the earth it is better to let the old lady lie there when her work is finished", Gauteng premier Mbazima Shilowa commented at the naming ceremony.

Edited by: Mariaan Webb
© Reuse this Comment Guidelines
 
 
 
 
 
 
 
 
Other Transport & Logistics News
Article contains comments
TNPA CEO Tau Morwe
State-owned Transnet has awarded a R760-million contract to a joint venture comprising Stefanutti Stocks and Axsys for the reconstruction of the steel sheet pile quay walls at Maydon Wharf, in Durban. The contract was signed by Transnet Capital Projects on behalf of...
About 67 000 retired Transnet employees and beneficiaries would be paid an ad hoc bonus equalling 8.33% of their yearly individual benefit by the end of April. Transnet on Tuesday said it approved R178-million to distribute among members of the Transnet Second...
MORE IN SA Phase 2 should see local content on the mainline locomotive increase from 65% to 80% by the end of 2014
The world’s lowest-cost diesel-electric locomotive is not made in China, but in Pretoria, at RRL Grindrod Locomotives’ newly upgraded 30 000 m2 plant. The company’s locomotive pricing is “more competitive than any other original-equipment manufacturer (OEM)...
More
 
 
Latest News
As industry prepares for the launch of South Africa’s digital terrestrial migration, the South African Communications Forum (SACF) hosted a workshop to determine the country’s readiness in terms of compliance of set-top boxes [STBs] and access to funding. The...
Higher Education and Training Minister Blade Nzimande
Higher Education and Training Minister Blade Nzimande has outlined plans for the development of a new health and allied sciences university into which the Medical University of Southern Africa (Medunsa) campus of the University of Limpopo, located in Ga-Rankuwa, will...
Communications Minister Yunus Carrim
The costs of communicating have to drop, Communications Minister Yunus Carrim said on Wednesday. "Clearly, the costs have to come down. It's not just in the interests of the poor and disadvantaged but the economy as a whole," Carrim said in a statement following a...
More
 
 
Recent Research Reports
Steel 2014: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2014 report provides an overview of the global steel industry and particularly of South Africa’s steel sector over the past year, including details of production and consumption, as well as the country's primary carbon steel and stainless...
Projects in Progress 2014 - First Edition (PDF Report)
This publication contains insight into progress at the delayed Medupi and Kusile coal-fired projects, in Mpumalanga and Limpopo respectively, as well as at the Ingula pumped-storage scheme, which is under construction on the border between the Free State and...
Automotive 2014: A review of South Africa's automotive sector (PDF Report)
The report provides insight into the business environment, the key participants in the sector, local construction demand, geographic diversification, competition within the sector, corporate activity, skills, safety, environmental considerations and the challenges...
Construction 2014: A review of South Africa's construction sector (PDF Report)
Construction data released during 2013 hints at a halt to the decline in the industry during the last few years, with some commentators averring that the industry could be poised for recovery. However, others have urged caution, noting that the prospects for a...
Electricity 2014: A Review of South Africa's Electricity Sector (PDF Report)
This report provides an overview of the state of electricity generation and transmission in South Africa and examines electricity planning, investment in generation capacity, electricity tariffs, the role of independent power producers and demand-focused initiatives,...
Defence 2013: A review of South Africa's defence industry (PDF Report)
Creamer Media’s 2013 Defence Report examines South Africa’s defence industry, with particular focus on the key players in the sector, the innovations that have come out of the defence sector, local and export demand, South Africa’s controversial...
 
 
 
 
 
This Week's Magazine
The Electronic Systems Laboratory (ESL) of the Department of Electrical and Electronic Engineering at Stellenbosch University is strongly reaffirming its position as one of South Africa’s leading centres for satellite technology and expertise. It is currently...
MORE IN SA Phase 2 should see local content on the mainline locomotive increase from 65% to 80% by the end of 2014
The world’s lowest-cost diesel-electric locomotive is not made in China, but in Pretoria, at RRL Grindrod Locomotives’ newly upgraded 30 000 m2 plant. The company’s locomotive pricing is “more competitive than any other original-equipment manufacturer (OEM)...
The South African Defence Review 2012, released to the public at the end of last month (despite the year given in its title) recommends the creation of the post of Chief Defence Scientist. This official would be responsible for the management of defence technology...
AltX-listed engineering technology company Ansys has been awarded an R188-million contract by Transnet to supply integrated dashboard display systems to the freight rail utility’s locomotives. Black-owned and controlled Ansys developed the bespoke integrated system...
South Africa’s sole nuclear power station Koeberg, which is located in the Western Cape, breached a major operations milestone on April 4, which marked the thirtieth anniversary of Unit 1 having been connected to the grid. Eskom, which operates the two-unit plant,...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks