{"projectrec":{"ProID":1728,"StandardTitle":"Morphological study river Scheldt near Liefkenshoek","OrigTitle":"Tunnel Liefkenshoek: Onderzoek betreffende de morfologische factoren","Acronym":null,"AbstractEnglish":"The Liefkenshoektunnel is the third road tunnel under the river Scheldt north of Antwerp. The tunnel is 1374 m long, 31,25 m wide and consists of 8 elements built on shore. The tunnel elements were towed to the site where they were immersed in a trench. The dredging works for this trench (28 m below low water) formed the main topic of this morphological study. With a navigation channel of 300 m width and 8,50m depth below low water, the trench caused an enormous perturbation of the hydraulic situation of the river, especially with a tidal range of more than 4,5 m. As a consequence, important siltation processes could be expected. Therefore IMDC was asked to execute the following tasks:\r\n<ul>\r\n<li>Preparation, coordination and partial execution of an in situ measuring campaign concerning tide, currents, salinity, turbidity and sediment transport;\r\n<li>Reporting and interpretation of the results of the measuring campaign;\r\n<li> Calibration of a two dimensional mathematical model to simulate water flows and sediment transport around the tunnel site;\r\n<li> Simulation of the morphological evolution of the site for different executional schemes of the dredging and immersion works in order to select the optimal working scheme as well as the most appropriate dredging equipment for maintaining the trench depth.\r\n</ul>\r\nTaking the importance of the simulations in the selection process into account, IMDC was solicited to take full responsibility over the control measurements and the scientific monitoring of the dredging) works during the entire immersion activities of all 8 elements. This monitoring and control programme included regular measurements of bathymetry, in situ sediment density, currents, turbidity, sediment transport, etc. Especially at a critical moment like just before the immersion of an element, this monitoring programme allowed to pass sound judgment on the acceptability of the natural conditions for safe operations.","AbstractOtherLang":"De Liefkenshoektunnel is de derde autotunnel onder de Schelde ten noorden van Antwerpen. De tunnel is 1374 m lang, 31.25 m breed en bestaat uit 8 elementen op de kust. De tunnelelementen werden naar de site gesleepd waar ze ingebed zijn in een sleuf. Het baggeren voor deze sleuf (28 m onder laag water) vormt het voornaamste onderwerp voor deze studie. Met een vaargeul van 300 m breedte en 8.50 m diepte veroorzaakte de sleuf een enorme verstoring van de hydraulische situatie van de rivier. Als gevolg hiervan konden belangrijke verziltingsprocessen verwacht worden. Daarom werd IMDC gevraagd de volgende taken uit te voeren:\r\n<ul>\r\n<li>Voorbereiding, coordinatie en gedeeltelijke uitvoering van een meetcampagne betreffende getij, stromingen, zoutgehalte, turbiditeit en sedimenttransport;\r\n<li>Rapportering en interpretatie van de resultaten van de meetcampagne;\r\n<li>Simulatie van de morfologische evolutie van de site voor verschillende uitvoeringsschema's van de bagger- en inbeddingswerken zodat het optimale werkschema en de meest geschikte baggeruitrusting gekozen kan worden.\r\n</ul>\r\nGezien het belang van de simulaties werd IMDC gevraagd volledige verantwoordelijkheid te nemen over de controlemetingen en de wetenschappelijke monitoring van de baggerwerken gedurende de volledige inbedding van alle 8 elementen. Dit monitoring- en controleprogramma bevatte geregelde metingen van bathymetry, in situ sediment dichtheid, stromingen, turbiditeit, sedimenttranstport, etc.","DateLastModified":{"date":"2024-05-06 10:25:46.257000","timezone_type":1,"timezone":"+00:00"},"ParentProID":null,"BeginYear":1989,"EndYear":1990,"BMonth":null,"EMonth":null,"BeginMonth":null,"EndMonth":null,"OrigTitleLangCode":"nl","OrigTitleLangID":41,"OrigTitleLangNL":"Nederlands","OrigTitleLang":"Dutch","OtherAbstractLangCode":"nl","OtherAbstractLangID":41,"OtherAbstractLang":"Dutch","OtherAbstractLangNL":"Nederlands","Progress":"Completed","ProgressNL":"Afgelopen","PublicFlag":1,"CheckedFlag":1,"ND":"2006-01-25","UD":"2006-08-24","DMPFlag":0,"Budget":null,"BudgetCurrency":"EUR"},"parent":null,"persons":null,"projects":null,"events":null,"datasets":null,"institutes":[{"instituterec":{"Acronym":"IMDC","ProPartID":6958,"PublicFlag":1,"OrigNameLangCode":null,"OrigNameLangID":null,"FullOrigName":null,"Line1":"Van Immerseelstraat 66","Line2":"2018 Antwerpen","Line3":null,"Line4":null,"InsID":777,"FullStandardName":"International Marine & Dredging Consultants NV","Role":"Executant","RoleID":31,"EncAddress":"Van Immerseelstraat 66, 2018 Antwerpen, Belgium"},"parent":null,"institutes":null,"references":null,"conferences":null,"datasets":null,"persons":[],"pastpers":null,"subpers":null,"projects":null,"urls":null,"pictures":null,"published":null,"affrefs":null,"collections":null,"thesterms":null,"taxterms":null,"geoterms":null,"thestermsFRIS":null,"nXtins":null,"previns":null,"spcols":null,"resmessage":"no id specified","complete":0,"participantrec":null,"peerrevs":null,"urlmaps":null}],"refs":null,"urls":[{"URL":"www.imdc.be/pdf/FI89005.pdf","externalID":null,"URLTypeCode":null,"URLType":null,"URLTypID":null}],"thesterms":[{"ThesaurusTerm":"Dredging","ThestID":2470,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Dredging","DutchTerm":"Baggerwerk","Code":"c_50c7fa97"},{"ThesaurusTerm":"Modelling","ThestID":5269,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Modelling","DutchTerm":"Modellering","Code":"c_230ab86c"},{"ThesaurusTerm":"Sediment flow","ThestID":7369,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Sediment flow","DutchTerm":"Sedimentstroom","Code":null},{"ThesaurusTerm":"Sediment transport","ThestID":7391,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Sediment transport","DutchTerm":"Sedimenttransport","Code":"c_d1a88f2d"}],"taxterms":null,"geoterms":[{"GeoTerm":"Liefkenshoek","GeoObjectID":17705,"OrigGeoTerm":"Liefkenshoek","DutchTerm":"Liefkenshoek"}],"funderids":null,"othtermsFRIS":null,"pictures":[],"spcols":[{"SpColID":27,"SpName":"ScheldeMonitor"},{"SpColID":43,"SpName":"Shipping"},{"SpColID":44,"SpName":"Shipping: Fairway"}],"resmessage":"","complete":1}