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DREDGING STIFF TO VERY STIFF CLAY IN THE WIELINGEN USING THE D.R.A.C.U.L.A.?SYSTEM ON A HOPPERDREDGE
| 题名： | DREDGING STIFF TO VERY STIFF CLAY IN THE WIELINGEN USING THE D.R.A.C.U.L.A.?SYSTEM ON A HOPPERDREDGE |
| 作者： | Ing. F. WARNIER; Ir. E. RAES; Ir. S. VANDYCKE |
| 关键词： | DRedging ; Cutting ; Liquid Action |
| 摘要： | Dredging stiff to very stiff clay with a hopperdredge has always given a number of operational problems resulting in a reduced or limited production. Thus when the dredging of clay was required, operational people always used mechanical and stationary dredges such as a cutterdredge, clamshell or bucketdredge. However, when the dredging area is one of Europe’s busiest waterways like the Wielingen and when the dredging area is exposed to rough sea conditions, an alternative has to be studied. When a stationary dredge is used the operational time would be reduced by interruptions clearing the dredge area for passing ships. Due to the exposed nature of the dredge area a seagoing dredge would be necessary and even then the operational time would be limited due to the number of stops because of the bad weather and rough seas. The patented DRACULA-system (DRedging And Cutting Using Liquid Action) presented a solution. The DRACULA-system integrates high pressure waterjets in the draghead of a conventional hopperdredge. As a result of the waterjets a number of classic problems when dredging clay are overcome. The clogging of the draghead was reduced, almost eliminated. The penetration of the draghead was no problem and there were no propulsion limitations for the hopperdredge, a normal trailing speed could be maintained. The overall pipe-production during dredging was also increased. This paper will describe the use of the DRACULA-system and the experiences during the deepening of the Wielingen where ‘Bartoenclay’ was dredged. |
| 总页数： | Proceedings of the 30th PIANC-AIPCN Congress. Sydney Australia. 22-26 Sept. 2002. pp9 |
| 报告类型： | 科技报告 |
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