The Hadeln canal lock was built in 1854 both for the drainage of the Hadeln canal and for inland shipping between the Elbe and Weser rivers. The embankment height of the Elbe dyke at the time was +6.60 metres above sea level. The new Hadelner Canal Lock must fulfil three essential functions:
- Ensuring coastal protection
- Drainage of the hinterland
- Access to the Elbe-Weser waterway
The new lock will be constructed in reinforced concrete in an excavation pit secured by piles with an underwater concrete base. In its final state, the buoyancy stabilisation acts as a deep foundation for the lock. The upper edge of the lock chamber is at NHN +3.0 m.
This allows the lock to be operated largely independently of the tide. The lock chamber can be drained for inspections and repairs. The wing walls on the inside and outside are designed as anchored steel sheet pile walls. Three lifting gates with electromechanical chain drives act as locking devices for lock and sluice operation. The existing connecting dykes will be adapted to the new structure in accordance with the current stock.
The new construction of the Hadeln canal lock is therefore primarily an urgent coastal protection measure to establish the current coastal protection level. The Hadeln canal lock must continue to fulfil the lock function in the future.
Client: Niedersächsischer Landesbetrieb für Wasserwirtschaft, Küsten- und Naturschutz
Processing period: 2015 – 2022
Lifting heights: 9.60 m/7.32 m (outer head/internal head)
Lock chamber dimensions: 36 m x 15 m
Construction type heads and chamber: solid construction
Total length of lock structure: approx. 70 m
Clear chamber width (usable width): 8,50 m
Type of foreshore: back-anchored sheet pile wall
Gates: 3 lifting gates with chain drive
Bridge construction: Reinforced concrete bridge
Complete replacement construction of the existing lock system with lock body (solid construction), locking devices, drives, technical equipment/control, excavation pit, coastal protection and flood protection measures during construction, wing walls, dike raising, operating building, operating areas and operating paths