TY - JOUR
T1 - Effect of spatial variability of block-type cement-treated ground on the bearing capacity of foundation under inclined load
AU - Kasama, Kiyonobu
AU - Whittle, Andrew J.
AU - Kitazume, Masaki
N1 - Funding Information:
A grateful acknowledgement is made to Professor Hidetoshi Ochiai, Professor Kouki Zen and Professor Noriyuki Yasufuku of Kyushu University for their helpful advice and encouragement. This research was supported by JSPS KAKENHI Grant Number JP19H02223 . Appendix A See Tables A1 and A2
Publisher Copyright:
© 2019
PY - 2019/12
Y1 - 2019/12
N2 - Deep mixing methods are widely used for stabilizing soft clayey soils and improving their bearing capacity. However, spatial variability in the shear strength of the cement-treated ground introduces uncertainties in estimating the bearing capacity for design. This paper evaluates the reliability of, block-type, cement-treated foundation under inclined load conditions using random field numerical limit analyses. The undrained shear strength is modelled as a random field which is characterized by a log-normal distribution and a spatial correlation length. Monte Carlo simulations are then used to interpret the stochastic bearing capacity factor and failure mechanisms for inclined concentric loading conditions at selected ratios of the shear strength ratio of cement-treated ground to original clay, the coefficient of variation in undrained shear strength and correlation length of the cement-treated zone. Variability of the undrained shear strength can reduce the expected bearing capacity of the cement-treated ground by 50–70% compared to homogeneously mixed clay.
AB - Deep mixing methods are widely used for stabilizing soft clayey soils and improving their bearing capacity. However, spatial variability in the shear strength of the cement-treated ground introduces uncertainties in estimating the bearing capacity for design. This paper evaluates the reliability of, block-type, cement-treated foundation under inclined load conditions using random field numerical limit analyses. The undrained shear strength is modelled as a random field which is characterized by a log-normal distribution and a spatial correlation length. Monte Carlo simulations are then used to interpret the stochastic bearing capacity factor and failure mechanisms for inclined concentric loading conditions at selected ratios of the shear strength ratio of cement-treated ground to original clay, the coefficient of variation in undrained shear strength and correlation length of the cement-treated zone. Variability of the undrained shear strength can reduce the expected bearing capacity of the cement-treated ground by 50–70% compared to homogeneously mixed clay.
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U2 - 10.1016/j.sandf.2019.11.007
DO - 10.1016/j.sandf.2019.11.007
M3 - Article
AN - SCOPUS:85077355408
SN - 0038-0806
VL - 59
SP - 2125
EP - 2143
JO - Soils and Foundations
JF - Soils and Foundations
IS - 6
ER -