Search Results: 'Black '

Validity of The NTNU Prediction Model for D&B Tunnelling
26 February, 2024
A number of predictive models for tunnelling works were established some decades ago by Norwegian researchers and continuously improved to better fit modern trends. This paper examines one such model, for Drill & Blast, against a range of recent project data from across the country. The findings demonstrate that while the empirical methodology is still highly relevant some further improvements, and additional empirical relations, are suggested to accommodate 16 years of development in technology, equipment, contractual issues and blast design

Trenchless solutions serve Red River Valley needs
30 October, 2023
Key infrastructure to meet vital water supply needs in Red River Valley, North Dakota, were met with the help of trenchless tunnelling. The project is described by Victoria Encapera, Aswathy (Ash) Sivaram, Kurt Ronnekamp and Kayla Christopher of Black & Veatch

Grouting Focus in Stockholm
25 August, 2023
The second half of the year’s tunnelling industry events commence with the latest Nordic Grouting Symposium to be held in Stockholm, over two days and packing in a course plus site visits

Packed schedule in Boston
28 June, 2023
TTNA previews the packed program for RETC 2023, in Boston, MA, in June

Small bores, big impacts
28 June, 2023
Views shared with TTNA on the trends and advances in the trenchless and microtunneling markets

Heavy Moves
12 June, 2023
TBMs on tunnelling projects are supported by major lifting capacity and conveyor capability

Observations and modelling of rock mass discontinuities
27 March, 2023
An alternative method for calculation of asymmetrical displacements in cases of predominant foliation is provided, based upon tunnelling experience from Lot E52 (Wolf) and Lot H51 (Pfons- Brenner) on the Austrian side of the Brenner Basistunnel. The paper is by Cristian Paduano, with Lombardi Group as Planning Manager for Brenner Basistunnel Nord PG BBT N, as JV for the planning, and Heimo Schierl, as geological supervisor with Brenner Basistunnel BBT SE

Tunneling under operating highways and railways: Part 2
16 January, 2023
Keivan Rafie and Gary Kramer of Hatch present the second of their two-part look at lessons in planning and constructing tunnel crossings with shallow cover under live transport corridors

Ensuring the seals on immersed tunnels
28 December, 2022
Use of rubber seals to make immersed tunnels watertight was the focus of a talk by Nicas van den Brink of Trelleborg to BTSYM/TAIym in 2020. Points covered are discussed plus a project update.

Tunnelling Under Operating Highways and Railways: Part 2
28 December, 2022
Keivan Rafie and Gary Kramer of Hatch present the second of their two-part look at lessons in planning and constructing tunnel crossings with shallow cover under live transport corridors.

An improving technology
22 April, 2022
Once described as a ‘black art’, soil conditioning is today a proven engineering technique. But the question remains, says Alessandro Boscaro of Mapei, of how to attain good technical performance while achieving acceptable environmental sustainability?

A long line of success
14 April, 2022
Dean Brox of Dean Brox Consulting reviews the benefits and successes associated with precast concrete tunnel linings when used for hydropower tunnels

Ivor Thomas Interview
21 February, 2022
Past BTS Chair Ivor Thomas has spent a lifetime in civil engineering construction. He spoke to Julian Champkin about the past and future of tunnelling, the need to enthuse the public – and the exciting challenges that the new generation of tunnellers will face

Mitigating a water bearing fissure
29 December, 2021
Emily Riley won the British Geotechnical Association’s (BGA) annual Cooling Prize competition for young professionals with her paper ‘The engineering mitigation of a water bearing fissure in the Chalk at the Tideway Deptford Church Street shaft’. It is reproduced here by kind permission of the BGA

Tackling Toronto’s CSO Woes
08 September, 2021
Toronto’s sewers are overloaded. Combined sewer overflows frequently spill into Lake Ontario, local rivers and streams. A major clean-up involving three separate tunnelling projects and more besides, is in progress. Julian Champkin reports

Learning from Istanbul
12 August, 2021
Prof Dr Nuh Bilgin, Chairman of the Turkish Tunnelling Society, and Sinan Acun, TBM Group Manager, Kolin-Kalyon-Cengiz Joint Venture discuss the lessons learnt in the complex geology of two EPB-TBM drives to the new Istanbul Airport

Forensic delay analysis for dispute resolution
18 June, 2021
Dimitrios Tousiakis, delay expert and Director of HKA Dubai, looks at applying Linear Scheduling Methodology tools to simplify forensic delay analysis for dispute resolution

Drill and blast tunneling
25 February, 2021
A form of blasting dating from the pre-explosive’s era involved excavating tunnels by lighting fires at the face and throwing cold water on the hot surface to crack the rock. Later on, blasting with black powder was invented and since then, there have been steady developments in explosives, detonating and delaying techniques, and in our understanding of the mechanics of rock breakage by explosives.

Trans Euro Express
17 July, 2020
The Magistrale is a 1,500km high-speed rail project that will link France, Germany, Austria, Slovakia and Hungary. Julian Champkin reports on the tunnelling through Germany’s Swabian Alps.

Wet weather ready
26 May, 2020
The Don River and Central Waterfront Project will help improve Toronto’s waterways by reducing CSOs. The project team provides an update on the Coxwell Bypass Tunnel