Safety Criteria for Channel Depth Design,
RIJKSWATERSTAAT THE HAGUE (NETHERLANDS)
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During the design of engineering works in waterways as a rule much emphasis is laid on reducing costs for construction as well as management and maintenance and increasing benefits. The probabilistic design methods that are being developed nowadays are most helpful in this respect. By a better statistical treatment of uncertainties, they have shown that it is often possible to reduce long-established safety allowances considerably and still conserve a high degree of safety. The maximum risk that is acceptable is a point of crucial importance for these methods. How these risks can be dealt with will be illustrated with the design of the dept of the channels for 22-m draught ships to Rotterdam. For that design a philosophy was developed to arrive at adequate safety standards. To quantify the developed criteria a number of desk studies, physical scale model tests, mathematical calculations, and studies on a ship maneuvering simulator were performed. Several research institutes were involved, in particular the TNO-Institute of Mechanical Constructions IWECO, the Delft Hydraulics Laboratory DHL, and the Maritime Research Institute of The MARIN, former NSMB.
- Civil Engineering