详情

原文传递 CONSTRUCTION OF THE RADAR TOWER ON THE OOSTDIJCKBANK, BELGIUM

题名：	CONSTRUCTION OF THE RADAR TOWER ON THE OOSTDIJCKBANK, BELGIUM
作者：	ir. Jan BAL; ir. Jan JACOBS
关键词：	CONSTRUCTION ; RADAR TOWER
摘要：	The geometry of the waterway, the hydrological and meteorological circumstances and the kind of traffic make the access to the busy channel of the Western Scheldt very complex. To ensure a safe and smooth access to the ports in the Western Scheldt (Vlissingen, Terneuzen, Ghent and Antwerp), a radar chain of 20 radar sensors and 5 manned traffic control centres, covering the entrance channels to these ports over a distance of more than 100 km, has been developed. This radar chain, an initiative of the Flemish and Dutch governments has been operational since 1991 and is currently being expanded to keep up with the last technological developments. In addition to this, in a broader vision to allow pilotage at greater distance and on a larger scale, especially in bad weather circumstances, a plan was made to extend the coverage of the radar chain in the North Sea at the Flemish and Dutch side. This paper will only handle the southern extension of the coverage area. Due to building regulations on land, and in order to extend the coverage area, it was decided to build the radar tower offshore on a very stable sand bank, “De Oostdijckbank”, located 25 km from Nieuport, where the depth of the seabed is 7 m below low water (LAT) (tidal range 5m) Instead of a long, expensive and vulnerable cable connection to the shore, a diesel generator was chosen for power supply and a radio-beam link for the communication transfer. The dish antenna is placed at 35 m and the radar antenna a height of 37 above low sea level. The availability necessary for the Scheldt radar chain is 99,9% which made the helicopter landing platform and other measures such as 100% redundancy back up of all vital technical devices necessary. By integrating a measuring station built for wind, currents and waves into the radar tower, the performance of the network of the “Vlaamse Banken”, a large number of measuring stations, can be improved making possible better prediction of water heights, waves and currents and having a positive impact on the accuracy of the mathematical models for this part of the North Sea. The radar tower consists of two parts : the radar pile, standing up 37 meters above low sea level, supporting the radar and transmission equipment, control room and emergency accommodation and measure instruments for wave, water and currents; and a pile with the major features of a helicopter platform, the engine room and a fuel tank of 40 m3 for continuous operation for a minimum of 4 months at a time. For installation purposes both piles will be split up into several parts, which will be pre fabricated at the building yard onshore to such an extent that the offshore work is limited to safe,fast and easy connections. All parts will be transported by and be installed from on board of jackup platforms. The foundation piles will be driven into the seabed. Connections between parts will be either welded or bolted.
总页数：	Proceedings of the 30th PIANC-AIPCN Congress. Sydney Australia. 22-26 Sept. 2002. pp12
报告类型：	科技报告