University of Twente Student Theses


Alternative study conveyor belt bridge Harlingen

Kuiper, D. (2022) Alternative study conveyor belt bridge Harlingen.

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Abstract:Frisia Zout B.V. is a company in Harlingen that extracts salt from the bottom of the sea and processes the salt into raw materials made for the industry. The salt is transported via conveyor belts that are located in bridges. The bridges are connected to buildings where the salt is processed. The bridges are heavily damaged by corrosion and negatively affected due to overdue maintenance. Frisia has outsourced the engineering of the new bridges to Bilfinger Tebodin. Together with Tebodin, the best design is examined by studying three alternatives. This research is mainly focused on the best-supporting structure. Preliminary investigation indicates that the following support structures are interesting to analyse: a space frame, a castellated beam and a cable-stayed bridge. The designs of the alternatives are based on issues found at the existing bridges, like corrosion and support availability. In conveyor belt bridge 3 and 4, the moisture content of the salt is 2%. Although the moisture content is regulated, it still has a major influence on the degree of corrosion. The corrosion and support availability are incorporated in Frisia’s requirements. The research aim is to find the best design to replace the conveyor belt bridge 3 and 4. This is accomplished by taking into account Frisia’s requirements in the design phase and alternative comparison phase. The dimensions of the different designs are determined by hand to get a rough view of the best alternative. The cable-stayed bridge alternative was dropped in an early stage of the research due to many flaws that had to be worked around. The advantage of the cable-stayed bridge, creating large spans by utilizing the construction height was due to horizontal actions not applicable and therefore dropped. The other two alternatives are elaborated and analysed in more detail. Both alternatives can technically comply with the design requirements of Frisia. However, with a multi-criteria analysis the space frame came up on top. This is due to slightly lower general construction costs. The dimensions of the space frame are in the final stage of this research optimized to create the most cost-efficient construction possible for Frisia.
Item Type:Essay (Bachelor)
Faculty:ET: Engineering Technology
Programme:Civil Engineering BSc (56952)
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