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Pseudo-Static and Pseudo-Dynamic Stability Analysis of Tailings Dam Under Seismic Conditions

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Title Pseudo-Static and Pseudo-Dynamic Stability Analysis of Tailings Dam Under Seismic Conditions
 
Creator CHAKRABORTY, D
CHOUDHURY, D
 
Subject Tailings earthen dam
Slope stability
Seismic load
Amplification
Seepage
Safety factor
WATERFRONT RETAINING WALL
EARTHQUAKE
DESIGN
 
Description In this paper the seismic slope stability analyses are performed for a typical section of 44 m high water retention type tailings earthen dam located in the eastern part of India, using both the conventional pseudo-static and recent pseudo-dynamic methods. The tailings earthen dam is analyzed for different upstream conditions of reservoir like filled up with compacted and non-compacted dumped waste materials with different water levels of the pond tailings portion. Phreatic surface is generated using seepage analysis in geotechnical software SEEP/W and that same is used in the pseudo-static and pseudo-dynamic analyses to make the approach more realistic. The minimum values of factor of safety using pseudo-static and pseudo-dynamic method are obtained as 1.18 and 1.09 respectively for the chosen seismic zone in India. These values of factor of safety show clearly the demerits of conventional pseudo-static analysis compared to recent pseudo-dynamic analysis, where in addition to the seismic accelerations, duration, frequency of earthquake, body waves traveling during earthquake and amplification effects are considered.
 
Publisher NATL ACAD SCIENCES INDIA
 
Date 2014-10-17T04:16:23Z
2014-10-17T04:16:23Z
2013
 
Type Article
 
Identifier PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES, 83(1)63-71
http://dx.doi.org/10.1007/s40010-013-0069-5
http://dspace.library.iitb.ac.in/jspui/handle/100/15925
 
Language en