Journal
GEOTECHNIQUE
Volume 69, Issue 5, Pages 420-433Publisher
ICE PUBLISHING
DOI: 10.1680/jgeot.17.P.254
Keywords
cut-off walls and barriers; groundwater; grouting; seepage; statistical analysis
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Funding
- Key R&D Plan Science and Technology Cooperation Programme of Hainan Province, China [ZDYF2016226]
- National Natural Science Foundation of China [51608218]
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This study examines the effect of geometric imperfections arising from variations in both the diameter and orientation of jet-grouted columns on the water-tightness of a jet-grouted cut-off wall. A three-dimensional discretised algorithm is used to detect and measure the discontinuities in the wall. A statistical evaluation of the gross flow rate through the cut-off wall with random flow-through pathways is carried out using Monte Carlo simulations. Based on the statistical results, a dimensionless design chart is proposed which can help engineers to devise safe and economical wall designs through trade-offs among various parameters such as target diameter, column spacing and number of rows.
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