A Study was undertaken to investigate the improvement subgrade soil contains highly compressible clay due to fiber inclusion in terms of CBR & UCS. Improvement of strength of soil may be undertaken by variety of ground improvement techniques like stabilization of soil & reinforced earth techniques etc. Reinforced earth technique is considered as effective ground improvement technique because of cost effectiveness, easy adaptability and reproducibility. The purpose of this investigation was to identify and quantify the influence of fiber variables (content and length) on performance of fiber reinforced soil. A series of laboratory unconfined compression strength tests and california bearing ratio tests were carried on highly compressible clay reinforced with polyester fiber. It was observed that there is a significant increase in CBR & UCS value with the inclusion of polyester fiber up to 1.5% fiber content for 12mm & 6mm fiber length.
A study on design & cost of unreinforced & reinforced flexible pavement was also undertaken. The study shows that there is a reduction in the cost of 17.55% for fiber reinforced subgrade containing highly compressible clay.
Soil properties, Alluvial Deposits, Statistical Analysis, Compression Index
