Search Results: 'Herrenknecht'

On the cutting edge
27 December, 2012
The process of mechanical excavation through dry ground, whether hard or soft, is pretty well understood. For ‘mixed’ ground, of whatever form, it is a different matter, especially if it is deep under groundwater. Maurice Jones reports that there is a consequent rush of TBM cutter development activities to gain the best competitive, and cutting, edge

Cleaner Columbus
22 November, 2012
The spine of Colombus’s Wet Weather Management Plan, OARS, will be operational by the last day of 2014, by EPA consent decree. Technical journalist Rhian Owen checks up on progress

A glowing report
23 October, 2012
The TAC directors provide an update for each region

Warsaw line two
28 August, 2012
Two of four TBMs have begun drives for the second line of the Warsaw metro system. Technical journalist Adrian Greeman looks at the challenges of cutting under a bomb littered city and the race to complete

Prague Metro’s return to TBMs
28 August, 2012
Ermin Stehlik and David Cyron of Czech contractor Metrostav give this detailed look at the extension to Prague’s Metro Line A and the return to TBM driven tunnels

Deep drives
18 July, 2012
The central element of the North-South line, in engineering terms and literally on the route line, is the bored tunnel section. Adrian Greeman visits the project

New compressed air guidelines
10 July, 2012
The March BTS meeting marked the launch of the joint ITA and BTS guidelines for good working practice in high-pressure compressed air (HPCA). BTS input had been through its Compressed Air Working Group. Donald Lamont, principal author of the document, summarised the guidelines. Werner Burger, chief design engineer for Herrenknecht spoke on the problems of HPCA for a manufacturer. Tony Ridley of Tony Ridley Hyperbaric Associates outlined UK experience with HPCA. And Claus Mayer, managing director of Nordseetaucher gave an account of his experiences with HPCA

Morocco’s record microtunnel
05 July, 2012
Morocco’s biggest microtunnelling project in length and diameter is Casablanca’s first as the city prepares to connect a new water treatment plant to its sewer network. Dirk Derycke, division manager tunnelling for Belgian contractor Denys gives this report on works in progress

Two worlds of tunnelling
03 July, 2012
The Middle East stays strong on tunnelling for its new dream cities, while a belt of hydropower projects buoys the African market. Alex Conacher reports

Intercept the flow
26 June, 2012
The spine of Colombus’s Wet Weather Management Plan, OARS will be operational by the last day of 2014, by EPA consent decree. Technical journalist Rhian Owen checks up on progress

Delhi digs
19 June, 2012
With a metropolitan population of over 16 million, a failed foray into privatised bus services and cars choking up one of the densest road networks in India, need for a metro has never been more pronounced. Alex Conacher interviews designer Mohan Gupta and Delhi Metro Rail Corporation spokesman Anuj Dayal to get the jewel of India’s infrastructure crown into perspective

Power up the future
17 May, 2012
UK gas and electric power network operator National Grid is engaged in a major renewal programme to ensure power supplies for the future. One aspect is to install high-voltage cables underground to renew the grid in major urban areas, starting with London. Maurice Jones visited one of the current tunnel drives in a 32km-long network that started recently in north London

A Brazilian perspective
17 May, 2012
Focusing on Brazil, the largest economy in Latin America and the recent host of the Third Brazilian Congress on Tunnels and Underground Structures, Alex Conacher speaks with Hugo Cássio Rocha, president of the Brazilian Tunnelling Committee

Crossrail countdown
17 April, 2012
With the first Herrenknecht TBM launching as T&TI goes to press, Alex Conacher takes a look back to site visits in early February as segment production had just begun, and the machines were being assembled in the west London mud

Lakeside risk
08 February, 2012
Challenging soil combined with strict deadline requirements to spur the City of Portland in Oregon, US, to award a non-standard contract. Construction on the much needed sewer relief project completed late last year as Nicole Robinson reports from site

From sea to shining sea
06 February, 2012
Demand for tunnels in North America is strong to meet public transportation and water conveyance needs. Nicole Robinson highlights projects in the region