Design Procedure for Asphalt Railway Roadbeds

by James Colville, (M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Maryland, College Park, Md.,


Serial Information: Transportation Engineering Journal of ASCE, 1979, Vol. 105, Issue 6, Pg. 651-665


Document Type: Journal Paper

Abstract: A series of design curves are presented for the design of a full-depth hot-mix asphalt pavement used to provide support for railroad track construction. The design curves, which provide estimates of the anticipated service life of the asphalt pavement, are developed from critical asphalt strain data obtained from a finite element analysis procedure. The conversion from critical strain to fatigue life is accomplished using current techniques employed in highway pavement design. The effect of rail size, tie size, tie modulus of elasticity, asphalt modulus of elasticity and Poisson's ratio, soil modulus of elasticity and Poisson's ratio, asphalt thickness, and car loading and axle spacing are considered in the analysis procedure. A procedure for relating the fatigue limits of design sections for wheel loads of any magnitude is also presented.

Subject Headings: Pavement design | Asphalt pavements | Soil modulus | Elastic analysis | Rail transportation | Elasticity | Vehicle loads

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