Bridges & Tunnels


DCN Diving has been involved in several major bridge contructions. DCN has experience in providing services for the construction of the bridge supports. DCN started these activities in the 70s with the construction of the Oosterschelde kering and later with major bridge construction projects such as Queensferry Crossing in Scotland. DCN provides services from the range of Civil Engineering, Caisson Deployment, Piling assistance, Underwater Concreting, further dive support. 


TBM & Tunneling


Prior to the Tunnel Boring Machine (TBM) operations DCN provides the complete package from civil engineering to dredging, dive support (under water welding/cutting, HP waterjetting), operations in bentonite, underwater concreting and other supporting activities. 

During TBM operations DCN provides support as well. As the head of the TBM is a hyperbaric environment were often maintenance/repair is required, our specalist hyperbaric workers carry  out these activities with our developed standard operating procedures and supporting equiment. 

A Few Key Projects

Kattwykbrug Hamburg

DCN Diving was contracted by VSF for the assistance to immerse caissons which functions as supports for the new Kattwykbridge in Hamburg. Main scope of the works was to provide specialist hyperbaric workers and equipment and to excavate sediment from the caissons in order for it to sink at a depth of 30 meters.

Queensferry Crossing

DCN Diving was contracted by Forth Crossing Bridge Contractors (consortium made up of Dragados, Hochtief, American Bridge International and Morrison Construction) for dive support and underwater concreting of the construction of the bridge supports /foundations.

Söderström Tunnel

DCN Diving was contracted for the execution of all diving activities prior to and during placing of tunnel elements  engineering, method statements, preparation and removal of subsea lifting structures on elements.

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