Understanding Track Engineering by Permanent Way Institution

Author:Permanent Way Institution [Permanent Way Institution]
Language: eng
Format: epub
Publisher: Matador
Published: 2015-06-08T16:00:00+00:00

8.3 VERTICAL CURVES

Gradients are determined from the lie of the land and the performance characteristics of the rolling stock. This section concerns itself with the geometry involved where two gradients meet. The question of the effect of irregularities in longitudinal level is covered in Chapter 2 .

Where two differing gradients meet, they are joined by a vertical curve, whose purposes are:

• to limit the vertical acceleration experienced by passengers, to a comfortable value,

• to limit the wheel unloading of freight vehicles,

• to prevent excessive compression of the springs of the inner axles of a bogie or locomotive having three or more fixed axles,

• to maintain under-clearance,

• to maintain over-clearance.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.