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Title: COMPACTED CLAY EMBANKMENT FAILURES
Accession Number: 00677575
Record Type: Component
Availability: Find a library where document is available Abstract: Embankment instability that occurred along several completed sections of a major interstate highway located in the western part of New York State is described. The affected embankments ranged in height from 4.6 m (15 ft) to 9.15 m (30 ft) and were constructed of silty clay over a silty clay foundation. Field investigations revealed that movements were taking place within the embankments and were not a result of the foundation soil. These movements were consistent with an undrained mode of failure. The embankment material was obtained from borrow excavations made outside the project limits and classified as a medium to highly plastic clay. The moisture contents of the borrow ranged from 25 to 55% and the plasticity index ranged from 15 to 32%. Drill holes progressed through the affected fills indicated that the embankment moisture contents at the time of distress exceeded the optimum moisture content (20%) by 5 to 10% based on a standard Proctor compactive effort. The undrained shear strengths at these moisture contents were not sufficient to provide for internal stability of the embankments. The results of the field and laboratory investigations are presented. They consist of inclinometer results of embankment monitoring, compaction curves for material used, and moisture contents and densities of fills obtained during construction and after movement began. A relationship between moisture content and undrained shearing strength is also shown. Stabilization consisted of flattening all embankments greater than 4.6 m (15 ft) from a 1 (vertical) on 2 (horizontal) to a 1 (vertical) on 3.5 (horizontal) side slope.
Supplemental Notes: This paper appears in Transportation Research Record No. 1462, Compaction of Difficult Soils and Resilient Modulus Testing. 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 #: 01495760
Language: English
Authors: Kyfor, Zenon GGemme, Raymond LPagination: p. 17-27
Publication Date: 1994
Serial: ISBN: 0309060680
Features: Figures
(13)
; Photos
(2)
; References
(6)
TRT Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: May 2 1995 12:00AM
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