Chakraborty, Debarghya and Choudhury, Deepankar (2013) Pseudo-Static and Pseudo-Dynamic Stability Analysis of Tailings Dam Under Seismic Conditions. In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES, 83 (1). pp. 63-71.
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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.
| Item Type: | Journal Article |
|---|---|
| Publication: | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES |
| Publisher: | NATL ACAD SCIENCES INDIA |
| Additional Information: | Copyright for this article belongs to the NATL ACAD SCIENCES INDIA, INDIA. |
| Keywords: | Tailings earthen dam; Slope stability; Seismic load; Amplification; Seepage; Safety factor |
| Department/Centre: | Division of Mechanical Sciences > Civil Engineering |
| Date Deposited: | 23 Apr 2013 06:08 |
| Last Modified: | 23 Apr 2013 06:08 |
| URI: | http://eprints.iisc.ac.in/id/eprint/46439 |
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