Please use this identifier to cite or link to this item: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1000239
Title: CHARACTERIZATION OF THE FOULED BALLAST LAYER IN THE SUBSTRUCTURE OF A 19TH CENTURY RAILWAY TRACK UNDER RENEWAL
Authors: Fortunato, E.
Keywords: Cyclic triaxial tests;Fouled ballast;Plate load tests;Resilient modulus
Issue Date: 2010
Publisher: The Japanese Geotechnical Society
Abstract: The purpose of these field and lab studies undertaken during rehabilitation work being done on an ancient railway line was to characterize a layer of ballast fouled with soil found in the track substructure. The field studies included the characterization of the thickness, grain size distribution and void ratio of the fouled ballast layer, as well as a large number of plate load tests, both on the fouled ballast layer and on the subgrade. The resilient behaviour of the fouled ballast was evaluated in the lab by cyclic triaxial tests on large size reconstituted specimens with distinct fouling indexes (different grain size distribution) and distinct humidity states (dry or wet). The results obtained were used as support for the decision to maintain the fouled ballast layer under the new sub-ballast in a number of stretches of the renewed line.
URI: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1000239
ISSN: 1881-1418
Appears in Collections:DT/NIT - Comunicações a congressos e artigos de revista

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