00641437

Component

http://onlinepubs.trb.org...trr/1993/1406/1406-008.pdf

https://scholar.google.co...s+Jr&publication_year=1993

A fine-grained soil mapped as the Cupco soil series by the U.S. Department of Agriculture's Soil Conservation Service was used as embankment material on a recent project. The project was located on US-59 in LeFlore County, near Panama, Oklahoma. The work called for embankment widening in the southbound direction. A segment of the completed embankment experienced some characteristic dispersive clay erosional patterns following a period of above-normal rainfall. Representative samples of the embankment material were taken from standard penetration tests, from thin-walled tube samplers, and by hand auger. A laboratory analysis determined the soil classification, in-place density, moisture content, and moisture-density relationships for the embankment material. To determine the dispersive characteristics, the following tests were used: pinhole, double hydrometer, soluble salts in the pore water, and crumb. Statistical analyses were conducted for the different dispersion test results. All four laboratory tests indicated a highly dispersive clay material. Correlations were observed among compaction water content and density and dispersion. The effects of the soluble salts in the pore water and clay dispersion were analyzed. It is believed that the main mechanism that triggered this embankment erosion was rainwater flowing in cracks that had resulted from earlier drying of the clay. Significant contributing factors were found in the plan design and during construction. The damaged embankment was repaired by undercutting and filling holes, gullies, and tunnels; plating with select material; and flattening the design slope.

This paper appears in Transportation Research Record No. 1406, Construction Robotics and Automation, and Foundations Engineering. 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

01403255

English

p. 50-57

1993

Transportation Research Record

0309055539

Figures (4) ; Photos (2) ; References (8) ; Tables (5)

Case studies; Clay; Embankments; Erosion; Fine grained soils; In place density; Laboratory tests; Moisture content; Pavement widening; Rainfall; Repairing; Soil types; Statistical analysis; Swelling index

Repairs; Widening

Data and Information Technology; Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Jan 25 1994 12:00AM

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