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Construction solutions: expertise and specialist equipment for specific construction projects

SAG subsidiary Bohlen & Doyen has been established on the market as a skilled partner for specialist construction projects for decades. Thanks to the staff's specialist knowledge and a modern fleet of specific construction equipment, Bohlen & Doyen can reliably complete projects in the field of special civil engineering, hydraulic engineering and HDD technology.

Special civil engineering

In the field of special civilengineering, Bohlen & Doyen has not only qualified and experienced staff, but also an extensive range of machinery with which even challenging projects can be completed quickly. Road construction, specialised pile driving, concrete foundations for pylons, sewer construction, culvert construction, dyke and port construction are included in the range of services.


Hydraulic engineering

Included in hydraulic engineering is, for example, the utilisation of water or protection against the effects of water. Bohlen & Doyen has the technical know-how and necessary equipment for such sophisticated building projects. The range of services includes pile driving, channel and port construction, dredging, dyke construction and culvert installation as well as near-shore pipeline construction.


HDD technology

Thanks to modern technology, many construction projects are today realised taking the environment into account. As one of the first providers on the German market, Bohlen & Doyen introduced environmentally-friendly and efficient horizontal directional drilling technique (HDD) for the construction of supply and disposal pipelines as well as conduits. The range of services in this process include the installation of horizontal filter wells and drainage, horizontal wells in all dimensions as well as land connections.