Lahn floating inspection gates (Lahnstein, Kalkofen, Cramberg, Nassau, Dausenau)

On five weir systems on the river Lahn (Lahnstein, Kalkofen, Cramberg, Nassau and Dausenau), the in-spection gates are implemented as floating inspection gates. The inspection gates on the weir systems differ in their inclination (from 0.0 ° to 37 ° to the vertical), in their section width and the head. The exist-ing inspection gates have aged and are therefore replaced by new ones.

The inspection gates are designed as welded steel structures and consist of a top and bottom part. Both parts are floatable separately (in the horizontal position). For transport, removable guard boards have been designed that facilitate orchestrating the gate parts into the lock chambers and protect the inspec-tion gates against damage.

According to the head required, an inspection gate is used as a single-part (bottom only) or two-part structure. Both parts are provided with extractable locking pins that may be extracted to the inside and outside. This is necessary since the weir systems have different weir section widths. When the locking pins are extracted, the trimming cells of the inspection gate may distinctly be flooded (this is controlled by compressed air), and the inspection gate attaches to the sill components.

In the course of planning, special services were performed in addition to the preparation of a CAD-3D model and FE computations. This included paint coating surface computation, quantity determination, floating stability computation, design of fall protection and removable walkways.

Project planning
Structural engineering

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