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- W588676872 abstract "Geotechnical fabrics were found to have considerable potential for improvement of railway track structure performance. Primary benefits are expected from material separation, preventing subgrade intrusion and/or subballast fines pumping, and from lateral restraint of ballast under train loads. Further research is necessary to define the presence of membrane type action by geotechnical fabric and to determine the exact conditions under which drainage in the plane of the fabric, observed for some nonwoven geotechnical fabrics, is desirable. The state-of-the-art in analysis, design, and construction of fabric-reinforced vertical retaining walls and embankments on soft foundation was found to be satisfactory for immediate railroad industry use, should these concepts be applicable in specific situations. Development of user-oriented test methods to measure fabric separation ability and the increase in ballast deformation modulus caused by use of geotechnical fabric are recommended, as is a detailed review of currently available fabric test methods, to determine their applicability to railroad operations. When compared to the total construction and/or maintenance cost associated with railway track structures, cost of fabric was found to be very small, thus development of appropriate performance specifications, to maximize intervals between periodic track structure maintenance, is of extreme importance. The geotechnical fabric property identified as most important for successful long-term fabric performance in track structures was clogging resistance. Interim recommendations for fabric selection and installation, in both new construction and maintenance activities, were developed, and are presented in the report text. These include suggestions for placement and location of the fabric in the track as well as types of improvements that can be expected from the placement of the fabric. (Authors)" @default.
- W588676872 created "2016-06-24" @default.
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- W588676872 date "1981-01-01" @default.
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- W588676872 title "USE OF GEOTECHNICAL FABRIC IN RAILROAD OPERATIONS" @default.
- W588676872 hasPublicationYear "1981" @default.
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