Ground Modification Techniques for Deep Soft Soils Sites in Goa Region

Abstract

AbstractSoft soils in their natural state are not recommendable for construction purposes as they do not support heavy loads, have a very low-bearing capacity and are susceptible to differential settlement. Soft soils can be improved by adopting various ground modification techniques like deep soil mixing techniques, grouting techniques, using stone columns, incorporating micro piles, dynamic deep compaction, soil stabilization using lime, using prefabricated vertical drains etc. It is necessary to carry out thorough a soil investigation before implementing any ground modification technique. Goa lies in the coastal region where the soil is 73% lateritic soil, 10% coastal sandy soils, 12% alluvial and marshy soil and 5% are marine soils. At some of the construction sites in Goa, soft marine clay deposits were encountered in the deep soil strata, which contains organic matter and are thus not suitable for construction without improving its properties. This paper discusses the case studies of different sites in Goa where deep soft soils are found. The paper aims at analyzing the soil stratum with the help of bore log data and suggesting suitable methods for ground modification of each site considering low-rise and high-rise structures to be built on it.KeywordsBearing CapacityGround ModificationDeep Soft Soils