Fallstudie av en plattrambro : Skillnader mellan prefabricerat och platsgjutet med aspekt på teknik, arbetsmiljö och ekonomi

Purpose: This study aimed to conduct a case study, with focus on work environment, economy and technical implementation, to determinate the difference if a prefabricated bridge had been constructed instead of a cast-in-situ bridge. Method: The study is based on a literature study and a case study. The case study is mainly based on interviews, data collection and attendance at the construction site. Results: The result of this study was that it is possible to combine both on-site and prefabricated elements, not as requested but as a beam frame bridge. The best option would be to cast the foundation on site and use prefabricate beams and retaining walls. Prefabricated elements are constructed in a more controlled environment and therefore it is easier to fulfil a better work environment. If the actual bridge were to be made with prefabricated elements instead of layed on-site, the price would not differ too much. Conclusions: The big difference between prefabricated elements and on-site concrete is the labour and the material cost for the formwork. The biggest risk, regarding work environment from both perspectives, was identified as working at heights and vehicle in movement