FFU Kunstholz-Querschnittsoptimierung Brückenholz und Weichenschwelle

摘要

Die TU München führte im August 2015 positive Untersuchungen an FFU Kunstholzschwellen zur Ableitung eines Momentes von 30,84 kNm in Schwellenmitte durch. Der minimale Querschnitt betrug hierbei b/h = 20/16 cm in Schwellenmitte. Im Frühjahr 2015 erstellte Prof. Freudenstein eine positive fachtechnische Stellungnahme für Weichenschwellen aus FFU Kunstholz mit einer Bauhöhe von 14 cm.%Synthetic wood made of fibre-reinforced foamed urethane (FFU) was developed in 1980 and, since 1985, has been the standard material used for sleepers carrying switches and crossings on the Japanese railways. It was in 2004 that the first European project was equipped with FFU. In 2009, the German Federal Railway Authority (EBA) granted approval for FFU with a height of 16 cm to be operationally tested on the German infrastructure network. In 2014, the EBA and the Swiss Federal Office of Transport (SFOT) authorised the use of sleepers made of synthetic wood with a height of 12 cm. This was followed in 2015 with the positive experimental results from Munich University of Technology regarding sleepers for switches and crossings with a height of 14 cm and for bridge beams in FFU synthetic wood with a height of 16 cm and a cross-sectional width of 20 cm in the middle of the sleeper. NetworkRail has also certified the use of this technology on bridges with longitudinal and transverse wooden beams.