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Title: GEOTECHNICAL CENTRIFUGE MODELING OF SOIL EROSION
Accession Number: 00450707
Record Type: Component
Availability: Find a library where document is available Abstract: Geotechnical centrifuge modeling has been used to special advantage in instances where the nature of a geotechnical phenomenon has not been entirely understood and where interaction of several effects makes standard analyses difficult to apply. The influence of surface erosion on slope instability is one such condition, but it is important to determine if these events are modeled in similarity. This question is addressed in this paper with an examination of the scaling laws for laminar seepage, turbulent surface flow, initiation of erosion and rate of sediment transport in centrifuge models built of either cohesionless or cohesive soils to scale 1/N. These scaling lanes are then compared to the laws for conventional 1 g models. The conclusions are: (a) turbulent surface flow and laminar seepage can be modeled correctly in the centrifuge model if permeability is reduced by a factor of N; this similarity cannot be achieved in a 1 g model; (b) erosion of cohesionless soil that results from overflow can be modeled correctly in the centrifuge and in the 1 g model provided all particles are reduced in size by a factor of N (this cannot be achieved, however, when emerging seepage is the dominant source of flow in either case); (c) in cohesive soils, initiation of erosion may be correct in the centrifuge model, but is not expected to be so in the 1 g model (it is unlikely that sediment transport is correctly modeled in either case); and (d) one erosion feature peculiar to centrifuge models is that erosion may be achieved either by increasing flow at constant acceleration, or by decreasing acceleration at constant flow.
Supplemental Notes: Publication of this paper sponsored by Committee on Mechanics of Earth Masses and Layered Systems.
Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01419879
Authors: Goodings, D JEditors: Withers, JuliaPagination: pp 1-6
Publication Date: 1984
Serial: ISBN: 0309038073
Media Type: Print
Features: Figures
(1)
; References
(15)
TRT Terms: Candidate Terms: Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: Feb 28 1986 12:00AM
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