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Photo: COWI

COWI Tunnel provides a full range of professional engineering services. 

A full range of professional engineering services are provided in geotechnical, structural and civil engineering disciplines for design and construction management, including construction inspection and performance evaluation of the system. The firm's senior staff has diversified geotechnical/geological experience on a wide range of projects under varying subsurface conditions. Services include, planning and management of subsurface explorations and laboratory/field testing programs, site evaluations, and foundation recommendations.

COWI Tunnel's staff has extensive experience in underground excavation in soft ground, mixed face, rock, and under waterways.  For rock, tunnel boring machine (TBM), roadheader, and drill-and-blast methods have been evaluated and specified based on economic comparisons and condition assessments. Slurry wall and freeze methods of earth support have been employed where appropriate. Soft ground tunnels have been constructed by earth pressure balance (EPB) machines, open-cut and cut-and-cover methods, and under both free air and compressed air. COWI Tunnel has designed several tunnels in soft ground and rock using New Austrian Tunnelling Method (NATM).  Immersed tube technology has also been  employed by COWI Tunnel when appropriate.

LAST UPDATED: 08.06.2017