Continuous dredging process ensures high efficiency
Damen Dredging Equipment has delivered DOP submersible dredge pumps to many dredging contractors around the world. As a result, an enormous variety of dredging projects have been brought to a successful conclusion. Currently, an interesting project is being undertaken by the Dutch contractor Martens & Van Oord in Cadzand, the Netherlands. The project has quite a challenge in store – unexploded ordnance (UXO).
The village of Cadzand is located in the south west of the Netherlands, on the shores of the North Sea. Its old marina entrance needed to be updated and the harbour was to be deepened. Not a simple job taking into account that conventional Second World War explosives were hidden in the seabed. Martens & Van Oord was up for the job – using a DOP submersible dredge pump in the process.
The DOP350 was attached to one of Martens & Van Oord’s pontoon-based excavators. The DOP pumped the bottom material – sand and occasionally UXOs – to a reinforced screening installation. From there, another Damen pump was used to bring the screened sand further to replenish the nearby shores. The choice for using the DOP was a simple one: the submersed dredge pump ensures a continuous process (in UXO-areas) contrary to mechanical dredging.
For sand mining purposes, a somewhat customised sand mining head with plenty of jetwater was fitted. This DOP head was designed for mining a maximum concentration using pressurised water to fluidise the bottom material.
Damen Dredging Equipment is proud that its DOP submersible dredge pump has been chosen by Martens & Van Oord to play a vital role in this extraordinary dredging project.
A short video is available at youtube.com click on: https://youtu.be/4aPXbrUVRrs
Damen Shipyards Group
Damen Shipyards Group operates 32 shipbuilding and repair yards, employing 9, 000 people worldwide. Damen has delivered more than 5, 000 vessels in more than 100 countries and delivers some 180 vessels annually to customers worldwide. Based on its unique, standardised ship-design concept Damen is able to guarantee consistent quality.
Damen’s focus on standardisation, modular construction and keeping vessels in stock leads to short delivery times, low ‘total cost of ownership’, high resale values and reliable performance. Furthermore, Damen vessels are based on thorough R&D and proven technology.
Damen offers a wide range of products, including tugs, workboats, naval and patrol vessels, high speed craft, cargo vessels, dredgers, vessels for the offshore industry, ferries, pontoons and superyachts.
For nearly all vessel types Damen offers a broad range of services, including maintenance, spare parts delivery, training and the transfer of (shipbuilding) know-how. Damen also offers a variety of marine components, such as nozzles, rudders, anchors, anchor chains and steel works.
In addition to ship design and shipbuilding, Damen Shiprepair & Conversion has a worldwide network of 15 repair and conversion yards with dry docks ranging up to 420 x 80 metres. Conversion projects range from adapting vessels to today’s requirements and regulations to the complete conversion of large offshore structures. DSC completes around 1, 500 repair and maintenance jobs annually.
About Martens & Van Oord:
Since its founding in 1986, Martens en Van Oord has become a leading company in the Netherlands, specialized in civil engineering. The organization is innovative and diverse and excels on land, in the water and where land ends and water begins. Smart logistics and efficient deployment of construction aggregates have been key factors since the company was founded.
More information can be found on www.mvogroep.nl