Search Results: 'CH2M'

Probabilistic and AI ground models to predict soil transitions
19 June, 2023
Rajat Gangrade, Senior Tunnelling Engineer in Arup’s San Francisco office, gave an online talk for the BTSYM lecture in February 2022. He presented a methodology for quantitative assessment and probabilistic interpretation of soil transitions and other critical subsurface features important in tunnelling. Here, he provides a summary of his presentation and also a brief update on ongoing research and applications

A new approach to tunneling
24 June, 2022
The complexity, cost and risk of tunnelling can be reduced by introducing radical new methods, writes Patrick Lane-Nott, Director of Engineering at hyperTunnel

Getting Clearance
20 December, 2018
Navigating existing infrastructure above and below ground, Dragados/ Tomlinson has completed the first of two drives for a new stormwater storage system in Ottawa. Nicole Robinson reports

Getting clearance
01 November, 2018
Navigating existing infrastructure above and below ground, Dragados/ Tomlinson has completed the first of two drives for a new stormwater storage system in Ottawa. Nicole Robinson reports

Risk management in major projects
05 September, 2018
Four speakers from across the tunnelling industry gave their perspectives on the management of risk in tunnelling and major infrastructure projects at the October 19 British Tunnelling Society meeting. Bill Grose introduced the topic and set the scene with lessons from history, Kevin Province spoke about catastrophic events and some observations on best practice, Nigel Legge discussed causes of tunnelling failures and methods of risk management, and Patrick Barney gave the perspective of the insurance industry. This report was prepared by Martyn Noak of CH2M

Risk management in major projects
06 February, 2018
On the 19th of October, four speakers from across the tunnelling industry gave their perspective on the management of risk in tunnelling and major infrastructure projects.

School’s in
22 January, 2018
Paola De Pascali looks at an array of the education and training programmes for underground construction that are on offer around the world

step up
16 May, 2016
The November 2015 meeting of the British Tunnelling Society was treated to a presentation on Abu Dhabi’s super sewer, the Strategic Tunnel Enhancement Project (STEP). The speakers were Shahzad H Orakzai, programme manager for the Abu Dhabi Sewerage Services Company (ADSSC); Mirko Martini, technical manager for Salini- Impregilo; Carola Edvardsen, technical director for Cowi

Tunnelling Down Under
16 May, 2016
Transport infrastructure is providing ample opportunity for Australia’s tunnelling industry. Keren Fallwell reports

Innovation & technological advances in the design of segmental lining
18 November, 2015
A report on the September 2015 meeting of the British Tunnelling Society, where engineers from CH 2M and Ozengi spoke on the future of segmental lining. For the full paper, please see Tunnels and Tunnelling September 2015, page 31. Paul Perry, newly appointed to the BTS Committee, and in charge of meetings, reports

How the west was won
27 June, 2014
Tunnelling work is as diverse and plentiful as the geography in the West Coast.

Fly over drive under
24 April, 2014
The new road tunnel at Calgary’s international airport is scheduled to open on time this spring. Conrad Hild, communications strategist with the city of Calgary, explains building the airport Trail Tunnel, from concept to construction.

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

Austin attracts the industry
13 August, 2012
The Southwest and the Rocky Mountain regions aren’t booming with potential for major tunnelling projects. But water scarcity keeps the industry working underground, reports Nicole Robinson

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

Lake Mead draws deep
13 June, 2012
With ever lowering water levels, tunnels are needed to reach deeper into the largest reservoir in the US to slake the thirst of Las Vegas. Technical journalist Rhian Owen meets the team that will stand the House a drink

Primary risk reduction
18 April, 2012
It is notable that many treatises on the subject of project risk management do not pay much attention to the subject of site investigation (SI), even though the gathering of accurate information before a tunneling project commences is bound to decrease risk to a project. Today there is a wide array of techniques available to collect such information and costs that can be balanced favourably against overall project expenditure. Maurice Jones reviews some of these

Stubborn to a fault
10 June, 2011
Construction of Intake No. Three at Lake Mead, Nevada, requires tunnelling beneath the lake and blasting at Saddle Island. With a deadline driven by the region’s drought conditions and drinking water at stake, progress on the project’s longest tunnel has been marred by a fault near the starter tunnels as Nicole Robinson reports from site

Probing the 710 freeway
24 March, 2010
Tunnel options are being evaluated following extensive site investigation for the ‘missing link’ section of California’s 710 freeway reports Patrick Reynolds

The Changing Face of Tunneling
05 June, 2008
North American Tunneling - June 7-11, 2008Hyatt Regency, San Francisco, California