Resumen de Superestructura ferroviaria para trayectos de circulación a gran velocidad
The heavy competition with which the railway is faced in these last years, with high speed trains, leads it to a profound investigation, not only of the types of trains, but also of the types of rails and their superstructures.
This latter, rails and superstructure, have met up with a misadjustment of conception with respect to the modern and rapid trains that circulate on them, these being, almost always, responsible for the speed limitations imposed.
The traditional superstructure of ballast still offers a wide margin of modernization and adaptation to the high speed trains. The use of crossties of greater surface and new design, make the better use of ballast possible.
However, it is the plate-line, the line mounted on a superstructure of reinforced concrete, that counts upon the widest margin of possibilities within the high speed line.
The fragility, in the presence of isolated forces and atmospheric changes, of the plate-line, has originated a series of laboratory tests and experimental spans, in order to fix the speed limits, the loads and atmospheric conditions which are necessary, for the safe usage of this type of superstructure.
This type of superstructure of reinforced concrete, plate-line, is also useful in tunnels and bridges.
The use of insulating and absorbent plastics in the cross-ties is one of the factors that condition a better service of the plate-line.
All the tests in experimental tracts have been carried out in the station of Rheda and the laboratory tests in the Technical University of Munich.
An ample bibliography on this theme accompanies this conference, which gives a widely guaranteed and justified scientific base.
