Effect of Sand Relative Density inside The Geotextile Pillow on the Bearing Capacity of Pad Foundation
A foundation is used to support a building or structure and transmits loads directly to theÂ underlying soil or rock. It must provide an adequate factor of safety against failure of the supportingÂ strata, as well as failure of any excessive settlement which can interfere the function of the structure.Â Ultimate bearing capacity of a specific foundation is one parameter commonly used to describe theÂ performance criteria of both the soil and the structure above. It can be improved by the inclusion ofÂ reinforcements in the ground such as geotextiles. In practice, geotextiles are normally placedÂ directly on the soil in the form of sheet and then covered with aggregates. This research wasÂ conducted specifically to investigate the effect of different sand relative densities inside theÂ geotextile pillow, an alternative of geotextile installations in practices, on the bearing capacity ofÂ pad foundation by laboratory experiments. A-10 cm x 10 cm pad foundation model was developedÂ in a 1 m3 box filled with sand to actualize this experiment. Geotextile sheet was formed into aÂ pillow, filled with sand with different relative densities and placed at a predetermined depth fromÂ the sand surface. As a result, the bearing capacity of the pad foundation model was proved toÂ increase by 50% using a sheet of geotextile compared to the one without any geotextile. Moreover,Â to the same condition, the use of a geotextile pillow with different sand relative densities inside theÂ pillow, i.e. 30%, 50% and 70% remarkably improved the bearing capacity of the pad foundationÂ model -from 150% to 525%. Among the experiment results using a geotextile pillow, the 66.67%Â addition of sand relative density increased the bearing capacity of a pad foundation model by 100%Â and 150% with 133.33% of sand relative density. It showed that the increase of the sand relativeÂ density inside the geotextile pillow was directly proportional to the increase of the bearing capacityÂ of the pad foundation model. Dibuat Oleh Â :Â Mia Wimala, Herianto Wibowo Alamat e-mail :Â miasoejoso@gmail.com Kata Kunci : Keterangan :Â Â Karya Ilmiah ini dimuat padaÂ Applied Mechanics and Materials, ISBN: 1660-9336, terpilih dari International Integrated Engineering Summit â IIES 2014 Effect of Sand Relative Density inside The Geotextile Pillow on the Bearing Capacity of Pad Foundation