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Title:

STABILITY OF SLOPES LOADED OVER A FINITE AREA

Accession Number:

00235855

Record Type:

Component

Abstract:

IN FRICTIONAL SOILS, WHEN PORE PRESSURES ARE NEGLIGIBLE, FAILURE OCCURS IN SHEAR ZONES. IN SUCH CASES THE STABILITY OF SLOPES LOADED OVER A FINITE AREA CAN BE ANALYZED BY BEARING CAPACITY METHODS. TWO METHODS OF ANALYSIS ARE PRESENTED: AN APPROXIMATE METHOD, BASED ON THE ASSUMPTION THAT A SLIP-LINE FIELD ANALOGOUS TO THE PRANDTL SOLUTION FOR HORIZONTAL GROUND APPLIES, AND A NUMERICAL METHOD, BASED ON THE NUMERICAL INTEGRATION OF THE GOVERNING DIFFERENTIAL EQUATIONS OF PLASTIC EQUILIBRIUM. A FORMULA FOR THE VALUE IS GIVEN FOR THE SLOPE ANGLE, FRICTION ANGLE, AND THE ANGLE OF THE INCLINATION OF LOAD AND SURCHARGE AS PRINCIPAL VARIABLES. THE CONCEPT OF STRESS GRADIENT, WHICH EXPRESSES THE RATE OF INCREASE OF THE BEARING STRESS FROM THE EDGE OF THE LOADED AREA, IS USED TO ACCOUNT FOR THE EFFECT OF THE WEIGHT OF THE SOIL. THE STRESS GRADIENTS OBTAINED BY THE APPROXIMATE METHOD ARE COMPARED WITH THOSE DETERMINED FROM BEARING STRESSES OBTAINED BY NUMERICAL INTEGRATION METHODS. RESULTS OF SMALL-SCALE EXPERIMENTS ARE PRESENTED SHOWING THAT THE DECREASE OF BEARING CAPACITY WITH SLOPE ANGLE CAN BE REASONABLY ESTIMATED BY THE APPROXIMATE METHOD. THE METHODS APPLY TO THE STABILITY ANALYSES OF HIGHWAY EMBANKMENTS AS WELL AS TO PROBLEMS IN LAND LOCOMOTION THEORY. /AUTHOR/

Supplemental Notes:

Paper sponsored by Committee on Embankments and Earth Slopes and presented at the 49th Annual Meeting. 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 Accession #:

01410262

Authors:

Karafiath, Leslie L
Nowatzki, Edward A

Pagination:

pp 14-25

Publication Date:

1970

Serial:

Highway Research Record

Issue Number: 323
Publisher: Highway Research Board

Media Type:

Print

Features:

Appendices (1) ; Figures (11) ; References (5) ; Tables (2)

Uncontrolled Terms:

Angles; Surcharge

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS, TRB

Created Date:

May 3 1971 12:00AM

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