THE USE OF WOVEN GEOTEXTILE FOR SETTLEMENT REDUCTION OF SPREAD FOOTING ON GRANULAR SOIL
Keywords:Woven geotextile, Settlement reduction, Spreadfooting, Embedment, Failure mode
Utilization of geotextiles has been known to reduce the settlement in any kind of soil such as sand. This study seeks to quantify the magnitude of the settlement reduction of spread footing on sandunder concentric loading and reinforced with geotextile. Geotextile was placed at varying depths from the base of footing. The comparison was done between the settlement data obtained from concentrically loaded spread footing with geotextiles and from a spread footing with no geotextile. The model ground was made of an alternating layer of Ottawa sand and black sand to visualize the ground deformation and with a target relative density of 75% prepared using air pluviation technique.From test results, it was concluded that geotextile is most effective in reducing the settlement when placed closest to the base of the footing having a depth of embedmentD that is equal to a quarter of the width of the footing. This location displayed the highest magnitude in terms of settlement reduction and consequently having the greatest load-bearing capacity. At this depth, the geotextile was able to reduce soil settlement up to 31% as compared to that footing without geotextile.Punching shear failure developed for footing with geotextile while local shear failure was observed for footing without geotextile.