Performance of Geosynthetic Encased Stone Columns in Sandwiched Solid Waste Layer at Saturation Condition

Solid waste heaps are become the biggest problem for geoenvironmental engineers due to their exposure to the natural agent’s rainwater and wind (leachate and spreading on the surface). They occupy a large area in the cities and below soil is contaminated; hence, construction becomes a challenge. This solid waste possesses low strength, highly compressible and high permeable large volumes. To use these solid wastes, sites shall improve its engineering characteristics up to the desired level. An attempt is made to strengthen this material using the high tensile stiffness geosynthetic (HTSG) encased stone columns. The multilayered model is created in a three-dimensional numerical program; solid waste is sandwiched between sand and clay. HTSG encased stone column is installed into the multilayer soil to improve the solid waste layer. And it is studied under saturation conditions. Significant parameters are investigated to understand the performance and behavior of the HTSG encased stone column in the solid waste at full saturation condition. The measured parameters are load-carrying ratio (LCR), settlement reduction ratio (SRR), radial deformation and bulging failure that have been studied by changing the stiffness of the encased geosynthetic. Results are shown that the promising performance of the HTSG encased stone columns can control the lateral bulging at the solid waste zone hence increasing its performance. This research may be useful to strengthen the solid waste dump sites, and hence, low to medium-scale construction activities can be made.