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May 2017
Volume 69    Issue 5

Compensation and jet grouting as mitigation measures for a TBM operation

Mining Engineering, 2017, Vol. 69, No. 5, pp. 113-113
Raschilla, Antonio; Violo, Valerio; Kafantaris, George


PREVIEW:

The Cityringen project in Copenhagen, Denmark will form a new circular line in the city center and will consist of 21 new stations (17 + four transfer stations) and approximately 31 km (19 miles) of earth pressure balance (EPB) twin-bored tunnels.

The new tunnels passed under the historical building of Magasin du Nord, McDonald’s and two pubs in the heart of the city with a minimum cover of about 4 m (13 ft).

To minimize the movements, a complex system of compensation grouting and jet grouting soil treatment was performed. A detailed action plan between the parties involved allowed coping with the critical tunnel boring machine’s (TBM) successful passage. 



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