Avances en el diseño y cálculo de columnas de grava. Parte II: Grupos de columnas y consolidación secundaria

Jorge  Castro

doi:10.3989/ic.71912

Authors

Jorge Castro Universidad de Cantabria https://orcid.org/0000-0001-5815-9995

DOI:

https://doi.org/10.3989/ic.71912

Keywords:

stone columns, settlement, secondary compression, design, group of stone columns, soft soil, critical length

Abstract

This paper comprises recent theoretical advances for the design and analysis of stone columns. This second part comprises some comments about the estimation of column diameter, about groups of columns and about excessive settlements induced by soil secondary compression. The number of columns, if the area replacement ratio is kept constant, has a negligible influence on the settlement reduction and the column position has a small influence on the settlement reduction. The critical column length is about twice the footing width or diameter. The paper also shows the lower effectiveness of stone columns in reducing the settlements induced by soil secondary compression. When secondary compression settlements are expected to be important, soil overconsolidation by preloading is advisable.

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References

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