Tractebel Hydroprojekt GmbH is taking on the tasks of construction supervision, object supervision, ecological construction supervision, plan review and the tasks of the SiGe coordination within the framework of the "Weserbrücke Intschede" consortium. The start of the construction project, with a construction volume of approx. 12.9 million euros, was in July 2020. According to the current status, the completion of the construction project is planned for June 2022.
The replacement of the superstructure, structures 57, 57A, and 57B, as well as the reconstruction and rebuilding of the piers in the foreshore area and the replacement of the abutments became necessary due to the reduced load-bearing capacity of the bridge train.
In addition to the renewal of the superstructures, the pier heads (structure 57) in the area of weir spans 1-3 will also be rehabilitated and partially renewed as part of the project execution. The piers above the powerhouse outlet of structure 57A will also be demolished and renewed. The piers including the foundation of the foreshore bridge (Structure 57B) will be rebuilt on the existing foundations as a shallow foundation. In addition to the demolition of the superstructure and piers, the existing outbuilding at the powerhouse forebay will also be demolished. However, the new construction of the outbuilding is not part of the tender. Following the complete new construction of the K9 over the Weser, the cables of the weir control system that were relocated in the run-up to the work will be relocated to their final position and reconnected.
The entire bridge has a length of approx. 380 m, whereby the foreshore bridge (structure 57B) has a length of approx. 179 m, structure 57A above the power plant outlet has a length of approx. 74 m and the section in the area of the weir overflow of the Weser (structure 57) has a length of approx. 127 m.
Demolition and shoring scaffolds will be erected for the dismantling and rebuilding of Structure 57. Pre-assembly of the falsework will take place on the specially constructed jetty and pre-assembly area in the downstream section of the weir. The prefabricated falsework is floated in by means of pontoons and lifted under the bridge by strand jacks. Subsequently, the yokes are installed on the existing weir bottom with the help of diver inserts.
Bastian Schmitt – Hamburg