Seismic bearing capacity of shallow footings on cement-improved soils

  • Kholdebarin, Alireza (Department of Civil Engineering, Faculty of Engineering, Kharazmi University) ;
  • Massumi, Ali (Department of Civil Engineering, Faculty of Engineering, Kharazmi University) ;
  • Davoodi, Mohammad (Department of Geotechnical Earthquake Engineering, International Institute of Earthquake Engineering and Seismology, IIEES)
  • Received : 2014.09.17
  • Accepted : 2015.01.07
  • Published : 2016.01.25


A single rigid footing constructed on sandy-clay soil was modeled and analyzed using FLAC software under static conditions and vertical ground motion using three accelerograms. Dynamic analysis was repeated by changing the elastic and plastic parameters of the soil by changing the percentage of cement grouting (2, 4 and 6 %). The load-settlement curves were plotted and their bearing capacities compared under different conditions. Vertical settlement contours and time histories of settlement were plotted and analyzed for treated and untreated soil for the different percentages of cement. The results demonstrate that adding 2, 4 and 6 % of cement under specific conditions increased the dynamic bearing capacity 2.7, 4.2 and 7.0 times, respectively.


vertical ground motion;cement-improved soils;dynamic vertical settlement;shallow footing;normal stress


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