橋梁設(shè)計(jì)外文翻譯--荷蘭跨線高架橋(文件)
【正文】 parts are mounted onreinforced rubber bearings. At their extremes, the sections are fixed horizontally in the crossdirection by steel guiding constructions that primarily absorb the horizontal thrust forces andcentrifugal forces。附錄 4 外文文獻(xiàn)翻譯 RAILWAY SUSPENSION BRIDGE IN WOERDEN, THE NETHERLANDS SUMMARY In Woerden, a small town in the west of the Netherlands, a railway flyover has been builtwhere two railway tracks meet. The flyover consists of a singletrack viaduct. This has alength of m. The crossing angle is 10 degrees. At the flyover site the viaduct is suspended from a pylon that has been constructed over two tracks passing underneath. 1. INTRODUCTION A railway bridge was constructed in Woerden as part of the track expansion of theNetherlands Railways. More trains will be run, the running speeds will be increased and thepossibility of delays must be reduced. In order to make this possible, many line sections mustbe fourtrack and trains must be able to cross each other at different levels. This paper examines the flyover in Woerden. 2. SITUATION AND REQUIREMENTS The flyover in Woerden must bridge the following elements: two existing tracks。 the ends of the bridge are free to move in the longitudinal direction. Thesection crossing the track is also fixed at the pylon both in the cross direction and in thelongitudinal direction by horizontal struts between the Ushaped floor and the pylon. Substructure The foundations of the flyover are primarily prefabricated prestressed 450 x 450 mm2 concrete piles with a length varying between 13 m and 18 m and with a pile depth varyingfrom m to m below ground level. Both abutments have a foundation of steel pipe piles 216。 bearing elements。 15,2 mm, FeP 1860. Eight units are used for each beam. For thecross prestressing, the BBRV system, which is not liable to wedgesettlement, was chosen. This was due to the relatively short length (approx. m), which means that the effect ofwedge settlement would have been too great on the extent of the prestressing. The average prestressing level in the Ushaped bridges is between and N/mm2. An additional plication arose at the pylon where the bridge is suspended with vertical guycables. There are three guy cables for each Ushaped beam which are carried via steelconduits 216。 508 mm with a wall thickness of 30 mm. The length varies from 1025 mm to 2285 mm. The brackets are constructed in such a waythat they are able only to bear pressive forces. The steel pipes provide support for concretebrackets at the base level of the bridge. This connection, that cannot absorb pull forces, isfitted with a conical dowel, a ‘seeker dowel’, that ensures that the support construction iscentred at all times, even when it is disengaged by
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1