Upper and lower bounds for the bearing capacity of foundations on soft soils with reinforcement columns

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Abstract

The finite element program mechpy, developed within the authors’ team, which implements the upper and lower bound theorems of limit analysis, is applied to the calculation of the bearing capacity of foundations on soft soils improved with reinforcement columns. The problem is analysed in two and threedimensions, considering the soil and the columns responding under undrained conditions, using different replacement area ratios and different column-to-soil shear strength ratios. The upper and lower bound results are found to be in a narrow range and in good agreement with experimental results found in the literature. A simple equation is proposed to evaluate the bearing capacity of soil reinforced with columns.
Original languageEnglish
Title of host publicationProceedings of the XVII ECSMGE-2019
Subtitle of host publicationGeotechnical Engineering foundation of the future
PublisherInternational Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
Number of pages9
ISBN (Print)978-9935-9436-1-3
Publication statusPublished - 2019
Event17th European Conference on Soil Mechanics and Geotechnical Engineering - Reykjavík, Iceland
Duration: 1 Sept 20196 Sept 2019

Conference

Conference17th European Conference on Soil Mechanics and Geotechnical Engineering
Country/TerritoryIceland
CityReykjavík
Period1/09/196/09/19

Keywords

  • limit analysis
  • bearing capacity
  • soil reinforcement with columns
  • tridimensional effects

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