Witteveen+Bos prepared reference designs and tender documents for three Design&Construct-projects (FIDIC Plant and Design-Build) for Ventspils Free Port Authority. The project comprises the design of a coal terminal (jetty structure), deepening of the access channel and rehabilitation of an existing oil jetty.
The most remarkable project was the design of the coal jetty. First a lay-out study and a preliminary design of a coal and oil terminal on both sides of the existing oil jetty (cofferdam construction) has been completed. After an evaluation it was decided that a new coal terminal jetty structure had to be designed at one side of the existing jetty. Two mobile coal loaders with a weight of 600 ton each will act on the coal jetty.
The jetty has a length of 330 metres and can accommodate vessels varying from 12,000 DWT to 120,000 DWT. The water depth extends to 16.5 metres. Besides other loads, ice loads in combination with unfavourable soil conditions play a significant role.
A preliminary design of the jetty was made for both a steel substructure as a concrete deck structure. Subsequently a final design was made of the concrete deck alternative as well as the tender documents. The tender procedure will start soon.
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