Liquid filtration properties in gravel foundation of railroad tracks

[摘要] Railway bed gravel foundation has a constant permanent impact on urban ecology and ground surface. It is only natural that larger objects, such as railway stations, make broader impact. Surface run-off waters polluted by harmful substances existing in railroad track body (ballast section) flow along railroad tracks and within macadam, go down into subterranean ground flow and then enter neighbouring rivers and water basins. This paper presents analytic calculations and characteristics of surface run-off liquid filtration which flows through gravel multiple layers (railroad track ballast section). The authors analyse liquids with various density and viscosity flowing in multi-layer porous medium. The paper also describes liquid stationary and non-stationary weepage into gravel foundation of railroad tracks.

[发布机构] Samara State University of Architecture and Civil Engineering, 194 Molodogvardeyskaya St, Samara; 443001, Russia^1

[效力级别] 数学

[关键词] Analytic calculations;Broader impacts;Ground surfaces;Harmful substances;Multiple layers;Porous medium;Railway stations;Various densities