Importance

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Abstract

A method of adjusting the geometry of a stretch of a railway track uses a track maintenance machine which runs on the track and which has at least one measuring reference system (13) guided by feelers (10,12) on the track and sensors (14,15) for determining the position of the track relative to the measuring reference system (13) and which also has track correcting tools (16). The method comprises performing a preliminary measuring run to acquire a series of track measurements at spaced points along the track by the sensor (14). A design profile is then determined from these measurements and correction values prescribed necessary to achieve the design profile. Then a maintenance run is performed during which the track correcting tools are controlled in accordance with the prescribed correction values whereby to adjust the track geometry. Also during both the preliminary measuring run and the maintenance run a second series of track measurement is made by sensor (15) at spaced points along the track and offsets measured by the sensor (15) during the preliminary measuring run and the maintenance run are used to determine the actual adjustment values made at the spaced points along the track.

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First Claim