The Yangtze River delta region displays distinctive engineering geological features characterized by sea-land interaction liquefiable ground,comprised of chalk,silt,and soft clay layers.As China's highway infrastructure advances rapidly,there is a pressing need to address the challenges posed by this type of ground.The Yangtong Highway project successfully utilized the innovative vibratory probe compaction method to enhance the sea-land in-tersection liquefiable ground.A comprehensive assessment of this method's effectiveness was conducted through a series of tests including indoor experiments,in-situ assessments,and settlement monitoring throughout the filling process,with a comparative analysis against traditional stone columns method.Results from the study revealed a significant enhancement in the density,internal friction angle,and compression modulus of the test area,accompa-nied by notable reductions in water content and void ratio.Furthermore,key soil properties such as cone resistance,sleeve friction,and SPT blow counts exhibited an increase exceeding 80％post-treatment,while surface wave ve-locity saw a 15％boost.The projected settlement after completion stood at 10.36 mm,meeting the required stand-ards for highway construction.Notably,the vibratory probe compaction method proved to be 38.0％more cost-effec-tive than the stone columns approach,boasting a streamlined and visualized construction process that is both auto-mated and efficient,showcasing promising economic viability and future application prospects.
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