Dynamic replacement columns are formed using a process described in the video below, through a succession of tamping and print backfilling phases. The Dynamic replacement process usually uses weights with smaller section as compared to dynamic compaction to improve the penetration and punching of the weight through the soft layer.
In some cases, the location of the dynamic replacement columns can be pre-excavated. The excavation is then partially backfilled with a “plug” of granular material. This initial plug is then driven into the soft layer by the tamping energy of the weight to the required depth of treatment. This crater is regularly backfilled with additional granular material between each tamping phase.
The backfill material can be either placed over the whole treatment site before pounding, thus creating a working and load transfer platform once the work is completed, or stockpiled at regularly spaced intervals across the site.
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Menard Asia is a specialist geotechnical EPC contractor offering ground improvement and remediation works in Malaysia, Indonesia, Vietnam, Singapore, Bangladesh, Cambodia, Philippines, Thailand and other South-East Asia Countries