Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Hammer time

With wind turbines becoming an increasingly popular source of renewable energy, the construction industry is looking at ways of building them quicker and more efficiently.

Piling specialist Aarsleff Piling has invested in a new piling rig to drive the larger and longer piles required to resist cyclical loads from wind turbines.

The rig is a Finnish Junttan PM26 LC, complete with a 9t Junttan accelerated hammer with maximum impact energy of 106kNm at full 1.2m stroke.

The first project for the PM26LC is for two Fenpower turbines at Ransonmoor near March, Cambridgeshire. Here, Aarselff Piling is installing 350mm square piles 26m long for contractor RG Carter Civil Engineering which is working under a £790,000 contract with Fenpower.

Arsleff's subcontract is worth £85,000 and the foundations are designed by German consultant HCE Ingenieurgesellschaft. "We have already installed foundation piles for over 50 wind turbine bases and by the end of this year we expect to have installed piles for another 44," says Aarsleff Piling managing director Terry Bolsher.

"The 9t hammer is one of a new generation of Junttan hydraulic impact hammers. It is operated from the rig's hydraulic system and hydraulically accelerates the drop weight during the fall. This has the effect of boosting the impact energy and increasing the efficiency at full stroke over a conventional free fall drop hammer of the same weight by up to 20%," he adds.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.