PROBLEMS OF RAILWAY MAINTENANCE OF WAY

A historical discussion is presented on the achievements of heavier axle loads and higher speeds. The planning of new and larger cars for the Rheinische Braunkohlenrevier is included. These cars will have an axle load of 50 tons. This is followed by both a theoretical presentation and actual results of tests of the behavior of the track structure under the loading of locomotives and cars. One interesting point brought out is that there is practically no difference in the depth and frequency of the deflection of the track under an E-10 locomotive at 10 KM/H versus 200 KM/H. Studies show the effect on track deflections with closer spacing of narrower ties, and also on a concrete track bed plate. Problems encountered with long, continuous welded rail are presented, and the stresses in the rail are shown under the varying conditions of temperature. The importance of exact alignment of the track laid in curves is stressed. It is concluded that with stiffer section, harder rails of steel free of impurities, heavier axle loads may be safely carried without damage, especially when the track is laid on narrower ties spaced more closely together (50 cm) on a deeper rock ballast bed. Further research will be required to determine if a new concept of track bed will be required for speeds of 250 KM/H and 40 ton axle loads.