Expansion water lock Eefde
In Eefde, just north of Zutphen, a second water lock has been built since the beginning of 2018, which functions as a connection between the Twentekanaal and the IJssel river. The new water lock will ultimately function completely energy-neutrally. TTTBV supplied various RGP frames and RGB frames from MCT Brattberg for this new ship lock. The new CCM Casting Module was also applied during the construction of the concrete walls.
The expansion at Sluis Eefde has been prepared by Rijkswaterstaat for several years. This was considered necessary, since the waiting time at the current lock is more than 30 minutes, making it difficult to estimate the travel time across the Twente canal. The original lock is also relatively small and shallow. The steady growth of water transport requires infrastructural investments, whereby bottlenecks in the network of waterways are removed as effectively as possible.
The second lock, which was built directly next to the current lock, includes a scoop for the Netherlands: a lock gate tilting up and down, a so-called segment door. This lock door is easier to maintain than traditional lock doors and can also be closed even in the event of a calamity in which uncommonly high water volumes flow into the lock.
The ‘Lock to Twente’ building consortium (L2T), consisting of Mobilis TBI and CroonWolter & Dros, received responsibility from Rijkswaterstaat for the complete construction of the new lock.
Casting Module CCM
MCT Brattberg cable penetrations were used to seal the cables that are necessary for the various control installations in the second lock chamber. When pouring the enormous amounts of concrete, around 8,000 m3 in total, the new CCM Casting Module was used to create circular openings in the concrete. At the Eefde lock, the CCM150 was used to provide the walls with 150 mm large, round recesses that are at the same time watertight. As soon as one of the relevant holes is needed to route cables through it, the round knockout plate in the middle of the CCM150 must be removed with a hammer, after which the desired cables can be fed through a MCT Brattberg RGP150 window and sealed watertight.
