Industriella metoder för platsgjutna vindkraftverksfundament
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The background to this report is the large number of wind turbines that there are plans to build in Sweden. In Jokkmokksliden outside Malå in Västerbotten the construction of a wind park began in 2010. This park will consist of 18 wind turbines designed by a German designer. The foundations for wind turbine towers are massive gravity foundations that are particularly complicated to reinforce and require many work hours. The purpose of this report is to examine whether and how, by applying new production methods and planning tools it is possible to increase productivity and reduce workload. To achieve this, an in-depth study of Lean Production has been performed. The construction site in Jokkmokksliden has been visited several times. During these the work process has been identified as well as the execution of two time studies that show how the work effort is allocated to different activities. With Lean Production theories as a basis, the work process and the time studies where then analyzed. In addition, the possibilities of applying prefabricated rebar carpets in the current foundation design as well as alternative foundation design were examined. The studies have shown that much of the effort is lost on activities that can be classed as totally unnecessary, but also that it with small changes should be possible to reduce the number of working hours for the reinforcement by at least 20%. The effort need to produce wind turbine foundations could also be reduced much more than so, however to achieve a larger reduction major changes would be needed either in the organization at large or by changing the foundation design. Using rebar carpets in the existing design has proved virtually impossible but by combining rebar carpets with the alternative design there is a possibility of reducing the work efforts to less than 50% of what it is today.
Place, publisher, year, edition, pages
2015. , 48 p.
Teknik, Lean production, Lean construction, vindkraftverksfundament, gravitationsfundament, betong, vindkraft
IdentifiersURN: urn:nbn:se:ltu:diva-58785Local ID: f59b9063-5c7d-4d20-a99c-2b679634cb8eOAI: oai:DiVA.org:ltu-58785DiVA: diva2:1032173
Subject / course
Student thesis, at least 30 credits
Civil Engineering, master's level
Larsson, JohanSimonsson, Peter
Validerat; 20130325 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved