External Stability Analysis of Narrow Backfilled Gravity Retaining Walls

Ahmed, Shaik Moin and Basha, B. Munwar (2021) External Stability Analysis of Narrow Backfilled Gravity Retaining Walls. Geotechnical and Geological Engineering, 39 (2). pp. 1603-1620. ISSN 0960-3182

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Abstract

A three wedge failure mechanism is proposed to determine active earth pressure exerted by narrow backfills on gravity retaining walls and its point of application. Gravity retaining wall proportions are optimized against external failure modes using proposed active earth pressure and its line of action of resultant thrust. Overturning failure, eccentricity failure of the resultant force, sliding failure on its base, and bearing capacity failure are given due consideration for the determination of optimum proportions of gravity wall. Optimum dimensions of the gravity wall are evaluated such that factors of safety against overturning, eccentricity, sliding, and bearing capacity should be greater than 2.0, 1.0, 1.5, and 2.5 respectively. Significant reduction in active earth pressure in narrow backfill width gravity retaining walls is noticed due to the inadequate development of shear bands because of the constraint of rock face boundary. The study recommends employing an appropriate failure mechanism for the development of shear bands behind retaining wall based on depth and width of narrow backfill. The proposed study indicates that significant savings in the cross sectional area may be accomplished as compared to a classical design by Coulomb’s theory.

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IITH Creators:
IITH CreatorsORCiD
Ahmed, Shaik MoinUNSPECIFIED
Basha, B. MunwarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Active earth pressure; Cross sectional area; External stability; Factors of safeties; Failure mechanism; Gravity retaining walls; Optimum dimensions; Point of application;backfill; bearing capacity; earth pressure; failure mechanism; gravity anomaly; optimization; retaining wall; stability analysis
Subjects: Physics > Mechanical and aerospace
Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 31 Jul 2021 06:36
Last Modified: 31 Jul 2021 06:36
URI: http://raiith.iith.ac.in/id/eprint/8593
Publisher URL: http://doi.org/10.1007/s10706-020-01580-3
OA policy: https://v2.sherpa.ac.uk/id/publication/17240
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