Norderney is one of the most popular islands on the German North Sea coast with tourists. To keep it that way, it is necessary to carry out regular maintenance measures to preserve the island’s stability in the long term.
The company, Tell Bau GmbH from Norden, using a new Doosan DX255NLC excavator, has just completed a project to implement one of the measures used to protect the island.
The project, which lasted about four months, was commissioned by the NLWKN (Lower Saxony Water Management, Coastal Defence and Nature Conservation agency). It called for the reinforcement of the revetment in the east of the island. A revetment is a passive structure which protects against erosion caused by wave action, storm surge and currents.
The project required the old revetment to be dismantled and a new revetment made of hydraulic rubble stone in full grouting to be constructed. At the same time, the asphalt revetment had to be renewed. The Doosan DX255NLC was used flexibly in various areas. Its tasks included both demolition and earthworks. The Doosan excavator was also used to drive sheet piles into the ground along the full length of the construction section using a Movax SG50V pile driver. In addition, utilising the on-board TopCon 3D system, the excavator produced the dyke shapes required for installation and profiling of the revetment.
Dipl. Ing. Andrej Achrameev, Project Manager at Tell Bau, commented: “Due to the diversity of the project, the excavator had to demonstrate a high degree of flexibility in various applications. It fully met this requirement.”
Thomas Gembler, Managing Director of Tell Bau, summarises the performance of the new machine: “Of course, we cannot conclusively evaluate the Doosan DX255NLC at this point, but the price-performance ratio is very good and so far the reliability is also impeccable.”
The Doosan DX255NLC has an operating weight of around 25 tonne. It is equipped with the 192 kW six-cylinder DL06 engine from Doosan. With its maximum digging depth of 6.81 m, it can be used extremely flexibly in civil engineering work. The DX255NLC at Tell Bau is fitted with a TopCon 3D control system and can be equipped with a Movax SG50P pile driver and a PowerTilt.
The special feature of this NLC (Narrow Long Crawler) excavator is its transport width of 3 m. This allows the excavator to be transported with a permanent excess width exemption in Germany.
