The II Oldenburg Dike Association is a public corporation in Lower Saxony and has set itself the task of protecting the state from flooding and storm surges. Dike construction is a continuous challenge, as dikes are dynamic structures and are therefore subject to settlement and subsidence. During storm surges, the water can rise up to 3.50 m above normal and higher (MTHW on the coast at approx. 2.00 m above sea level). The situation then becomes critical, as the waves can crash over the dyke, soften the inland berm and destroy and erode the entire dyke. But the preferred habitat of wading birds and shelducks in the mudflats is also in danger.
Coastal protection means dyke protection and contributes to species conservation
After the original Schweiburger Siel was decommissioned, it was completely replaced by the "Schweiburger Siel mouth scoop" in 2006. From then on, a combination of an inlet structure on the inside as a deep-founded reinforced concrete structure and an outlet structure on the outside of the dyke as a deep-founded solid structure with an underwater concrete base was used.
As part of the new construction of the Schweiburger Siel, the existing pipe penetrations had to be sealed against pressing water. The experts for sealing products, DOYMA, designed a special Curaflex® C/C/T/NZ solution (pressing water, split, non-centric) for this purpose, which was installed bythe contractor Behse GmbH. The products are resistant to seawater, which is one of the properties required for this special construction project. The special combination and properties of the stainless steel and rubber material used for the sealing insert are crucial for ensuring the watertightness of the drainage system. A 25-year guarantee reflects the durability of DOYMA quality.
