Field Strength Assessment of Soft Coastal Soil Stabilized by Deep Mixing Method: Influence of Key Parameters
DOI:
https://doi.org/10.64862/Keywords:
Deep mixing, Soil stabilization, Soft coastal clay, Cement content, Field strength, UCS, Decision treeAbstract
The southeastern coastal plain of Bangladesh contains highly compressible and soft clayey soils that pose significant challenges to infrastructure development. This study investigates the improvement of such soils at Matarbari-Dhalghata Island using the Deep Mixing Method (DMM) and assesses the influence of multiple parameters on the unconfined compressive strength (UCS) of the treated soil. The parameters include binder content, mixing energy, curing, and construction conditions. Laboratory trial mixes, field trials, and full-scale core sampling were conducted to evaluate field performance. The results show that the UCS strength correlates strongly with the binder dosage and water-cement ratio, and the field performance validates the design approach. Decision tree-based predictive modeling showed the highest accuracy in forecasting UCS. These findings support the optimized application of DMM for coastal soil stabilization under varied site conditions.
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