Bahnelevationen

Bahnelevationen is a term used in railway engineering, primarily in the Nordic languages, to describe the vertical elevation profile of a railway alignment along a given route. The compound combines bane or bane meaning track with elevasjonen or elevation, reflecting a focus on vertical geometry rather than horizontal alignment.

Definition and scope: Bahnelevationen refers to the measured or modeled height of the track relative to a reference datum, such as sea level or the datum used for the project. It encompasses gradients (slopes), vertical curves, cut-and-fill elevations, and drainage considerations along the line. It is used in planning, design, and verification of routes.

Measurement and data: Elevation data are obtained from surveys, LiDAR, or existing GIS datasets. The data are represented as an elevation profile, often plotted versus distance along the track. Engineers use it to evaluate gradients, determine stationing, and assess effects of weather, flooding, or thermal expansion.

Applications and significance: Understanding the Bahnelevationen is essential for ensuring adequate clearance under bridges, tunnel portals, and catenary systems; for calculating earthworks quantities; and for estimating energy consumption and maintenance needs associated with grades. It also informs drainage design to prevent water pooling on the track bed.

Terminology and context: The use of Bahnelevationen varies by region and language. In English-language practice, terms like vertical alignment, grade profile, or track grade are more common, but Bahnelevationen may appear in local planning documents and technical reports.