Mühleteich Riehen

To improve the flow rate, TBA-Basel Stadt wanted the bridge over the Mühleteich to be rebuilt. By removing the centre wall, the risk of clogging was to be reduced, for which the existing load-bearing system of two-span continuous girders had to be converted into a single-span system.

The supporting structure was prestressed using shape memory reinforcement (re-fer) to avoid deformations and cracks from load redistribution and to increase the load-bearing capacity accordingly. Furthermore, existing bank walls were replaced with reinforced concrete structures as part of the project.

One of the requirements was that the supporting structure and the abutments should be preserved. In addition, work had to be carried out in confined spaces and with little room for manoeuvre in terms of height, all while minimising construction costs.

The project is characterised by a number of special features, such as the use of re-fer reinforcement (shape memory alloy) to apply a prestressing force. In addition, the structure consisted of two different load-bearing structures from different construction periods. The location above water and groundwater protection zone S2a further complicated the work.

Our services as part of the project included the dismantling of the existing structure as well as the structural design and excavation support. We also offered support with our consultancy services.

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