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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 4
Nat. Hazards Earth Syst. Sci., 10, 685–698, 2010
https://doi.org/10.5194/nhess-10-685-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Approaches to hazard evaluation, mapping, and mitigation

Nat. Hazards Earth Syst. Sci., 10, 685–698, 2010
https://doi.org/10.5194/nhess-10-685-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  09 Apr 2010

09 Apr 2010

A genetic-algorithm approach for assessing the liquefaction potential of sandy soils

G. Sen and E. Akyol G. Sen and E. Akyol
  • Pamukkale University, Department of Geological Engineering, Denizli, Turkey

Abstract. The determination of liquefaction potential is required to take into account a large number of parameters, which creates a complex nonlinear structure of the liquefaction phenomenon. The conventional methods rely on simple statistical and empirical relations or charts. However, they cannot characterise these complexities. Genetic algorithms are suited to solve these types of problems. A genetic algorithm-based model has been developed to determine the liquefaction potential by confirming Cone Penetration Test datasets derived from case studies of sandy soils. Software has been developed that uses genetic algorithms for the parameter selection and assessment of liquefaction potential. Then several estimation functions for the assessment of a Liquefaction Index have been generated from the dataset. The generated Liquefaction Index estimation functions were evaluated by assessing the training and test data. The suggested formulation estimates the liquefaction occurrence with significant accuracy. Besides, the parametric study on the liquefaction index curves shows a good relation with the physical behaviour. The total number of misestimated cases was only 7.8% for the proposed method, which is quite low when compared to another commonly used method.

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