Numerical study on bearing capacity of single stone column

• Published in: International Journal of Geo-Engineering
• Main Author: Ng K.S.
• Format: Article
• Language: English
• Published: Springer 2018
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062393281&doi=10.1186%2fs40703-018-0077-z&partnerID=40&md5=8e7659e2f976e926cbdeca2db97d6dfb

Stone columns are an efficient ground improvement technique for treating problematic soils. The confidence in the prediction accuracy of bearing capacity remains unsatisfactory. This paper aims to investigate the bearing capacity of single stone column using three-dimensional numerical analysis. Failure modes were observed and the effect of key parameters such as column’s friction angle, undrained shear strength of surrounding soil and modular ratio were investigated. Numerical results showed bulging and a combination of bulging and punching are two dominant failure modes for the single stone column. Ultimate bearing capacity is mainly influenced by the column’s friction angle and the undrained shear strength of the surrounding soil. Based on the results, a new prediction method is developed and compared reasonably well with the existing analytical solution and the field measurements. © 2018, The Author(s).