EXPERTISECivil Engineering, Design, Tunnelling
Joseph Gallagher were contracted to design and build the temporary and permanent works for a drive shaft and 146m long microtunnel, as part of the Tolmount Gas Pipeline.
Working within the live Centrica Storage (CSL) Gas handling facility which harbours gas from pipelines within the North Sea provided its own challenges for both logistically and in terms of adapting ‘normal’ operating procedures. For example, we made adaptions to our diesel and electric plant including adding spark arrestors and chalwyn valves.
Working closely and collaboratively was essential from the very start.
During the mobilisation stage, we worked alongside Saipem to gain perimetry and a full understanding of terminals procedures. This collaborative approach formed a good working relationship from the beginning, enabling us to obtain documentation and work permits within a week, which is very challenging within a live terminal environment.
Both the 21-metre-deep jacked caisson shaft and the microtunnel, were completed within programme and on budget.
This project was entirely managed with internal resources, including a 50t, 8t cranes and 34t excavator with grab provided by NRC Plant and man-riding cages, shaft plant and equipment provided by Specialist Plant Limited, and the Uncle Mole Microtunnelling TBM and support systems were provide by ISKEI, all part of the Joseph Gallagher Group of companies.