Improvement of Soil by Using Polymer Fiber Materials Underneath Square Footing

The change in project cost, or cost growth, occurs from many factors, some of which are related to soil problem conditions that may during construction and/or site investigation period. This paper described a new improvement method with minimum solution by using polymer fiber materials having length (3 cm) both directions and (2.5 mm) thickness, distributed uniform medium dense .sandy at different depths (B, 1.5B 2B) below the footings. Three square footings has been used (5,7.5 10 carry above lever arm loading system design for such purposes. These fibers were depth (0.1B) footing base down investigated depth. It was found initial vertical settlement highly affected early stage due complex Soil-Fiber Mixture (SFM) footing. failure load value proposed model any case increased compared un-reinforced increasing improving Bearing Capacity Ratio (BCR) soil-fiber mixture ratio (1.4 2.5), (1.7 4.9), (1.8 8) (5, 7.5, respectively. yield load-settlement started about 1.1% B while smaller percentage reflects benefits materialfor behavior. Comparison between experimental predicted (calculated) showed difference ranges within accepted limits foundation settlements