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Offshore pile driving equipment: cheaper and faster solutions

Naturally, you are looking for the best pile driving equipment that's available in the offshore market. But it's also your responsibility to reduce costs of installation. Finding a cheaper and faster solution to drive piles in the seabed is key. Have you ever considered using vibratory pile driving methods instead of the conventional piling hammer? The oil, gas and wind industry are just getting to know this alternative pile drilling installation method. Looking at recent pilot projects for offshore wind farms, the results are very promising.

Short background: a beautiful example of industry collaboration

Reducing costs of installation and therefore reducing the cost of offshore wind, making green energy competitive with conventional energy sources. That was the main driver for a group of developers and operators of offshore wind farms in 2014 to start a one year onshore-test to validate the vibratory driving of large monopiles for offshore use. Dieseko Group was the supplier of the PVE 500M vibratory hammer.

You are welcome to watch the short - but impressive - video of the onshore test below.


Which pile driving equipment is the faster and cheaper solution?

The test: comparing a conventional impact hammer to vibratory pile driving. Which pile driving equipment proves to complete the job faster and cheaper? The test results showed for various reasons that the vibratory hammer (in this case the PVE 500M) can be viewed as the fastest and cheapest pile driving equipment.

  • Faster

The installation for the vibratory method is up to ten times faster: the installation process for impact driving is 30 minutes, while the installation time for a vibratory hammer is 3 minutes. Also, in the test, the 93 ton monopile was vibrated into the ground within minutes. With the impact hammer method, it costs at least 1 hour to get the pile into the ground.

The PVE 500M is compact, so the total lifting height of pile and vibratory hammer is as small as possible. It can be controlled to produce a similar bearing capacity to impact hammered piles.

Pile driving equipment

  • Cheaper

Vibration technique does not only work less noisy, the technique will eliminate the need for noise reduction measures, such as bubble curtains or noise insulating enclosures. A vibratory hammer reduces the initial noise emission tremendously, is much faster and will therefore save on additional hours, efforts- and equipment. This has a huge positive impact on the costs of offshore projects.

  • More careful

Also, the pile driving equipment that used vibration is friendlier to the environment. The test (conducted on land) highlighted the vibratory method generates lower peak noise emissions. When ramming a pile into the ground with an impact hammer, it takes a lot more effort to decrease the noise. In addition, the vibrating is less harmful for mankind, animals, and the pile itself. Experts believe that this new technical development can extend the life of the pile with 20 to 25 years.

Another example is extracting (decommissioning). The vibratory hammers can be used to extract foundations, without leaving debris on the seabed as a result of the internal cutting of piles. Vibratory extraction is evolving and offers an economic and ecological solution for utilities.

Dieseko Group: a long offshore track record

Dieseko Group’s PVE always had a strong focus on engineering, research and development for pile driving equipment such as vibratory hammer solutions and power packs. Dieseko Group has a long track record of installing piles in the North Sea for the oil and gas industry. Since the late 80s, our vibratory hammers have been operated on numerous projects and based on this experience we designed, tested and produced equipment to serve the highly demanding offshore oil and gas industry worldwide. In order to develop new installation methods and products, Dieseko Group takes part in research and industry wide study projects, concerning offshore foundations.

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Topics: Piling and vibratory equipment

Posted by Herald Wattenberg on Feb 16, 2016 10:00:00 AM


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