PREDICTIONS OF PORE-WATER PRESSURE AND SOIL SUCTION CONDITIONS IN ROAD CUT SLOPES IN ST. LUCIA, WEST INDIES: A METHODOLOGY TO AID CUT SLOPE DESIGN

There is evidence in the tropics that soil suction may play a most significant role in slope stability. In many developing areas of the tropics, relatively rapid assessments of both road alignment and road maintenance frequently have to be made. A prediction capability is sought for soil suction in selected residual soils of relevance to road cut slopes in St. Lucia, West Indies, and the topographic, material, and precipitation controls on the soil suction are established. It is shown that a dummy variable regression model employing material permeability, precipitation, and qualitative site factors provides good estimates of the recorded soil suction. In addition, the variable importance of threedimensional slope topography on soil suction is identified. Failures logged during the study period conform to the high-risk sites estimated by the soil suction prediction model. The low site investigation requirement combined with the accuracy of soil suction prediction render such a procedure of potential use to road design and maintenance in tropical areas where only limited geotechnical investigations are possible.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1984/965/965-004.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=PREDICTIONS+OF+PORE-WATER+PRESSURE+AND+SOIL+SUCTION+CONDITIONS+IN+ROAD+CUT+SLOPES+IN+ST.+LUCIA%2C+WEST+INDIES%3A+A+METHODOLOGY+TO+AID+CUT+SLOPE+DESIGN&author=M.+ANDERSON&author=P.+Kneale&publication_year=1984
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• Supplemental Notes:
  • 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. Publication of this paper sponsored by Committee on Engineering Geology.
• Authors:
  • ANDERSON, M G
  • Kneale, P E
• Conference:
  • 63rd Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1984-1-16 to 1984-1-20
• Publication Date: 1984

Media Info

• Media Type: Print
• Features: Figures; Maps; Photos; References; Tables;
• Pagination: pp 21-31
• Monograph Title: Soil reinforcement and moisture effects on slope stability
• Serial:
  • Transportation Research Record
  • Issue Number: 965
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Design; Developing countries; Embankments; Forecasting; Highway design; Highway maintenance; Mathematical models; Permeability; Pore water; Regression analysis; Residual soils; Slope stability; Soil suction; Tropics
• Uncontrolled Terms: Models
• Geographic Terms: St Lucia (West Indies)
• Old TRIS Terms: Precipitation
• Subject Areas: Data and Information Technology; Design; Geotechnology; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00394987
• Record Type: Publication
• ISBN: 0309037220
• Files: TRIS, TRB
• Created Date: Nov 30 1985 12:00AM