A new generation of suspended standardized lock gates for Walloon canals

Project context: innovating while unifying

As part of the construction of four new locks on the Canal du Centre and the Charleroi-Brussels canal (Va gauge), greisch developed a unified technical solution for laterally moving suspended gates. This project aims to ensure maneuvering safety, optimize the weight of metal components, while promoting strict standardization of components and relevant architectural integration.

A redesigned suspended structure: simplicity and stability

A self-stabilizing gantry

The gantry, the system’s central element, adopts a geometry with inclined legs ensuring longitudinal stability without the need for additional bracing. This choice optimizes the transfer of vertical, lateral (wind), and dynamic loads during operations.

An innovative suspension with independent cables

Each gate is suspended by six independent cables, arranged according to the gantry inclinations. This isostatic configuration allows perfect synchronization between the motorized trolley and the gate, ensuring quick and safe closure

Ecluse détail du principe de raidissement vertical - greisch

Optimizing the gate itself

Vertical stiffness and easier maintenance

The gate panel has a rigid structure without horizontal stiffeners, minimizing fouling by submerged deposits. This design ensures better longevity and facilitates inspection and painting operations.

A lighter trolley system

Thanks to the panel’s intrinsic stiffness, the suspension points are limited to two, reducing the complexity and weight of the traveling trolley.

Vue éclatée de la porte écluse - greisch

Advanced standardization: a single system for four sites

All gantries, trolleys, and upper gate casings are identical, with adjustable elements (lifting lugs, technical walkways, dampers) allowing adaptation to each site. This modularity ensures interchangeability of parts and simplifies maintenance logistics.

A modular and versatile spare gate

The spare gate is made up of three stackable blocks, covering all heights needed for the four locks. The use of bolted connections slightly reduces fatigue life but remains suitable for a reserve part.

Enhanced safety and simplified maintenance

Integration of technical access

The maintenance walkways are integrate into the structure of the gates and the gantry legs, providing direct access to critical equipment without additional structures.

Anticipated heavy maintenance scenarios

Specific support beams were designed to allow a gate to be laid dry for heavy repair, using adjustable plates and an external lifting device.

A sustainable, clear, and homogeneous solution

The solution developed by greisch for these four Walloon locks combines innovation, safety, and streamlining. The integrated approach to gantries, panels, and equipment not only meets functional requirements but also fits into a sustainable logic, clear for operators, and harmonious in the landscape.

Read the full article in English – IABSE Congress 2025 (PDF)

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