Abstract: This article introduced construction techniques, construction process and specific parameters of marine soft mucky soil improvements by water surcharge and vacuum preloading method. The observed settlement data from the ground surface during the construction indicate that the settlement rate reduces with time and the primary consolidation settlement rate tends to converge. The paper also compares the results of laboratory tested physical index properties, cone penetration and standard penetration test before and after the surcharge. The results indicate that the soil properties improved by the surcharge operation. Further, the plate loading tests performed on the surcharged soil verifies effect of the soil improvement.

Key words: Water Surcharge with Vacuum Preloading, Observed Settlement, Soft Mucky Soils, Soil Improvements