BED PROTECTION FOR EXTREME STORM SURGE INFLOW THROUGH FAILING SLUICEGATES
نویسندگان
چکیده
At the northern part of The Netherlands closure dam Afsluitdijk is situated. It primary flood defense that closes off Lake IJssel from Wadden Sea to protect provinces against storm surges. This structure was built in 1930’s and needed be improved withstand foreseen increase surge conditions sea level rise. consists a 32 km long with five discharge sluices for regulating water at IJssel. Three these are located west end two east end. Due climate change larger discharges foreseen. Therefore new were between three old Den Oever capacity. A bed protection designed ensure stability sluices. needs inflow during worst case scenario one sluice does not close 45 hour surge. event has probability occurrence 1/1,000,000 per year. During this extreme load case, flows through open gates into difference up 6.6 m. causes 3600 m3/s currents supercritical speeds 9 m/s. Erosion cannot prevented entirely high velocities. length large enough keep scour hole away structural natural part. introduced minimize protection, reducing construction costs CO2 footprint. For design approach erosion resistant boulder clay layers subsoil taken account as ‘Building Nature’. To achieve custom made challenge. predict flow behavior combination process extremely complex. could predicted conventional formulas methods. multiple approaches used combined. resulted being based on computer simulations, 2D 3D model tests calculations formulas. 24 first 19 m concrete slab sheet pile last 5 grouted rock. thickness rock 1-1.5 required prevent uplift due flow. Further downstream will develop. location forms protection. expected development field geometry determined. resistance laboratory samples site. lead conclusion reduces
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ژورنال
عنوان ژورنال: Proceedings of ... Conference on Coastal Engineering
سال: 2023
ISSN: ['2156-1028', '0589-087X']
DOI: https://doi.org/10.9753/icce.v37.papers.30