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Title: A simulation-optimization model for Stone column-supported embankment stability considering rainfall effect

Landslide due to rainfall has been and continues to be one of the most important concerns of geotechnical engineering. The paper presents the variation of factor of safety of stone column-supported embankment constructed over soft soil due to change in water level for an incessant period of rainfall. A combined simulation-optimization based methodology has been proposed to predict the critical surface of failure of the embankment and to optimize the corresponding factor of safety under rainfall conditions using an evolutionary genetic algorithm NSGA-II (Non-Dominated Sorted Genetic Algorithm-II). It has been observed that the position of water table can be reliably estimated with varying periods of infiltration using developed numerical method. The parametric study is presented to study the optimum factor of safety of the embankment and its corresponding critical failure surface under the steady-state infiltration condition. Results show that in case of floating stone columns, period of infiltration has no effect on factor of safety. Even critical failure surfaces for a particular floating column length remain same irrespective of rainfall duration.
Authors:
 [1] ;  [2] ;  [3]
  1. Associate Professor, Department of Civil Engineering, IIT Kharagpur, Kharagpur-721302 (India)
  2. Assistant Professor, Department of Civil Engineering, IIT Kharagpur, Kharagpur-721302 (India)
  3. Former B.Tech Student, Department of Civil Engineering, NIT Rourkela, Rourkela (India)
Publication Date:
OSTI Identifier:
22494569
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1705; Journal Issue: 1; Conference: 1. conference on progress in applied mathematics in science and engineering (PIAMSE) 2015, Bali (Indonesia), 29 Sep - 1 Oct 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; EMBANKMENTS; ENGINEERING; FAILURES; LANDSLIDES; OPTIMIZATION; PARAMETRIC ANALYSIS; SAFETY; SIMULATION; SOILS; STABILITY; STEADY-STATE CONDITIONS; SURFACES; VARIATIONS; WATER; WATER TABLES