Effect of Coir Geocell on the Liquefaction Potential of Coastal Sand

Soil liquefaction is a phenomenon that occurs in saturated cohesionless soils and has been of great concern for many years. Natural geosynthetics have been used in numerous studies to enhance soil characteristics and lower the possibility of liquefaction. Natural geosynthetics are helpful since they are economical and easily accessible in geotechnical engineering practice. But, according to the research published so far, coir products have yet to be used to their full potential as reinforcing materials. This paper studies the effects of coir geocell reinforcement on the strength improvement of geocell-reinforced coastal sand through laminar box shake table tests. In these tests, the initial relative density of the saturated sand bed was kept as 30% and the model's total height, including coir geocell, was 600 mm. Four tests were conducted placing geocell (GC) of various heights (full height (FH), half height (HH), and intermediate height (IH). According to the findings, using coir geocell has decreased coastal sand's susceptibility to liquefaction regardless of its height. This might be due to the additional confinement qualities the geocell displayed, given that each cell was concurrently filling and confining and strengthening the sand bed. The 200 mm full height geocell (FHGC) reinforcement caused the most significant reduction or a 44.5% gain in liquefaction resistance.