The Moselle lock in the south of Trier is currently being extensively extended and features an additional, highly efficient lock chamber. Including intake and outlet structures, the new, second lock measures a total of 312 m. Filling and emptying take place using longitudinal channels that are arranged on both sides together with transverse-positioned branch channels.
The reinforced concrete structure with massive component dimensions and a high degree of reinforcement was realized at a depth of 15 m within bored pile walls. The time-consuming structural work was completed in autumn 2017. After completion of the hydraulic steelwork and mechanical engineering works, lock operations are to be started in 2018 for the second lock.
Around 45,000 m³ of concrete processed
In total, around 45,000 m³ of concrete were processed on the large-scale construction site in just under 1.5 years. The lock chamber is being constructed parallel to the 170 m long existing lock, and is 216 m long, 12.70 m high and has a usable width of 12.60 m. Seven further projects of this kind between Koblenz and Trier are scheduled for completion.
Challenging large-scale construction site
The formwork and reinforcement work in particular presented a major challenge. The main issue here was taking into consideration a large number of mounting components with extremely tight tolerance specifications. In order to comply with the required accuracies along with the short construction schedule, a formwork concept with a high level of prefabrication was selected. The prefabrication process included all recess units and timber formers used, for example, for intake funnels, gate recesses and floating bollards – designed for providing efficient striking operations as well as ensuring reusability.
Working in close cooperation, PERI supported the construction site managers from Hochtief Infrastructure GmbH with a project-specific formwork and scaffolding concept, just-in-time deliveries of accurately pre-fabricated formwork elements as well as continuous on-site support.