Prof. Coenraad Esveld - Articles and news items
Editorial board / 16 December 2009 /
After his graduation Prof. Esveld held various positions in the Permanent Way Department of Netherlands Railways. In 1990 he left the railways and started his consulting company Esveld Consulting Services.
One of the most important developments in the last decade was the large scale application of slab track. This is in particular the case for high-speed tracks. In countries like The Netherlands, with very soft soil conditions, classical high-speed tracks could only be realised without massive soil improvements via grouting and deep mixing.
For a long time now, poor weld geometry has been a major problem for railway infrastructure. Due to geometrical imperfections, high dynamic loads could be generated during wheel passage. The only way to control the geometrical quality in an effective way, is by measuring and documenting every weld with an electronic straightedge such as the […]
Currently, all over the world, non-ballasted track concepts are being applied, although still at a moderate volume. If the low maintenance characteristics of slab track on open line are to be retained, great care must be taken to ensure that the subgrade layers are homogenous and capable of bearing the loads imposed. The slabs can be precast or poured on site. The most known tracks with precast slabs are on the Shinkansen line in Japan and Max Bögl slab track designed in Germany, while examples of the tracks with on site poured slabs Rheda 2000 (Germany) and various designs of an Embedded Rail Structure can be mentioned.
Delft University of Technology has developed and successfully implemented a procedure for optimisation of a railway wheel profile. An optimised wheel profile reduces wheel/rail wear and prevents vehicle instability. During the last decades substantial progress has been made in the design of railway vehicles and running gear. Tilting trains, high speed trains, active steering wheelsets […]
Delft University of Technology has developed new technical regulation standards for the geometrical deviations of metallurgic rail welds in The Netherlands, in cooperation with the Dutch rail infrastructure manager ProRail.