Search Results: 'Black '

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

TBM undergoes in-tunnel diameter conversion
14 July, 2021
US-based TBM maker Robbins announced recently that its 11.6m-diameter Main Beam TBM (‘Big Tex’) – the largest rock machine ever to bore in the US – has recently undergone a diameter change during tunnel excavation.

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.