Abstract: (715 Views)
One of the most important challenges in the development of urban railways network is the effects of railway
vibrations on human and adjacent structures. Although various investigations into the sources of railway
vibrations have been conducted, very few research works have been reported on the influences of track
geometry parameters on the level of vibrations. This is addressed in this research. The influences of railway
track geometry parameters including rail cant, track gage, super-elevation, curve radius, profile, alignment
and twist on ground-borne vibration were investigated by sensitivity analyses of a numerical model
developed in this research. The model was validated using data obtained from a comprehensive field
measurement conducted in Tehran Metro Lines (Iran). Results indicate that the effects of geometry
parameters on track vibration levels are considerable. Based on the results obtained, the current code of
practice was improved by establishing new limitations on the allowable track geometry parameters
tolerances. It was shown that consideration of these new limitations ensures that the induced track vibrations
remain within the allowable limits.
Type of Study:
Research |
Subject:
General