Search Results: 'Meyco'

Clarifying the fog of fibres
19 July, 2010
In response to reported confusion over the roles of fibres in concrete and, in particular, the claims and counter-claims of suppliers of steel and synthetic (polymer) versions, concerning their advantages and disadvantages, Tunnels & Tunnelling International has decided to try to clarify the issues involved for our readers. Maurice Jones reviews the responses to an information gathering questionnaire and other relevant evidence so that readers can, perhaps, make their own judgements

Thin barrier integrity – the easy way?
10 June, 2010
One of the major developments of recent years has been the development of sprayed linings, especially to control potential water make in an operational tunnel and to protect equipment and users from its effects. In this market it competes with many techniques, but chiefly coming up against the use of sheet membrane. So are sprayed membranes making serious inroads into this market and are there any limitations to this deceptively simple idea? Maurice Jones reports on some developments and applications.

Hallandsas first drive approaches end
02 June, 2010
Construction of the Hallandsas railway tunnels in western Sweden has often been described as the most difficult tunnelling project in the world. Many readers would probably want to argue that point but there is no disputing how tricky it has been over the 18 years since construction began. Now, however the Vinci-Skanska contracting joint venture is making steady progress. Maurice Jones reports

Meeting shotcrete specifications
23 March, 2010
In the long history of shotcrete, or sprayed concrete, linings underground, never has so much been expected of them. In the transition in scope from hard rock primary support to soft ground permanent support, shotcrete is now expected to create structures under even more demanding conditions, but still at comparatively low cost. Here technical editor Maurice Jones reviews the state of some developments designed to meet such demands

Feeling the heat
10 February, 2010
Tunnelling through a mountain is tricky at the best of times, but when the conditions are arid and your explosives have to be kept under armed guard, things get a whole lot trickier. Emma Gritt reports

BASF-MEYCO and SANDVIK announce global cooperation
27 November, 2009

Protecting Gotthard’s cut-and-cover
27 October, 2009
Alessandro Ferrari of Lombardi Engineering Ltd looks at how passive fire protection being used to protect Gotthard’s cut-and cover Bidio Section

Passive resistance
27 October, 2009
Claire Verani of MEYCO Global Underground Construction examines the use of passive fire protection

Composite solution
05 June, 2009
Claire A Verani, Design Interface Manager, Meyco Global Underground Construction, BASF Construction Chemicals describes a fully bonded waterproofing membrane

Hindhead hit
27 October, 2008
The A3 Hindhead twin bore tunnels, under construction in England, are taking forward the development of permanent SCL. Report and photos by contributing editor Patrick Reynolds

Bribane’s quiet achiever nears end
23 September, 2008
Tunnelling successfully under a heritage-listed jail was one of several interesting challenges for Brisbane’s Boggo Road Busway Alliance (BRBA). Gavin Bradford, project manager for Stage Two of the Alliance, describes the project to date

Performing seals control hazard
05 June, 2008
Ensuring a completely waterproof tunnel for its entire design life can be an expensive and inexact task. Maurice Jones looks at the latest techniques to make sure tunnel users don’t get their feet wet

Sprayed concrete success
29 April, 2008
Tunnel support and lining methods involving sprayed concrete have had more than their share of controversy. Technical journalist, Maurice Jones, looks at this maturing technology with practitioners and suppliers

Simple spray display
08 August, 2007

Ingredients for success in shotcrete?
19 February, 2007
Sprayed concrete seems to attract more than its fair share of heated debate. Technical journalist Maurice Jones attempts to sort out what is available, what is useful, and what it is supposed to do

Sprayed concrete linings: more quality than width
20 December, 2006
Technical journalist Maurice Jones brings us up to date on what is being done to ensure the quality and suitability of materials and workmanship in relation to sprayed concrete linings

Katschberg breakthrough
15 June, 2006

Eagle's Nest falls behind in HK
10 December, 2004

Prague subway's defensive role
01 July, 2004

Evolution in shotcrete technology
01 October, 2003
Increasingly, emphasis within the industry is towards a 'holistic' development of sprayed concrete technology. Assistant editor, Amanda Foley, looks at some of the recent developments in shotcrete materials and talks to two of the industry's leading materials and equipment suppliers