Authors : Ichsan Rauf, Lawalenna Samang, Tri Harianto and Ardy Arsyad
Abstract: The Earth improvement on active zone of retaining structure became an effective and reliable method to increase the stability of retaining wall. In this study, the performance of Lightweight Geocomposite Material (LWGM) as a backfill were investigated by measuring the retaining wall deflection and compared with other materials. The LWGM were created by mixture soil with Expanded Polysterene (EPS) and its stabilized with Waste of Buton Asphalt (WBA). The compositions of LWGM consists of 7% of WBA and 0.30% of EPS based on dry density of soil in form of block with dimension 0.20×0.20×0.59 m. The laboratorium-scale model using container steel with dimension of 1.50×0.60 and 1.40 m in height while the sheet pile model using 3.2 mm steel plate with dimension 1.20×0.59 m. Based on the results, it shows that the utilisation of LWGM backfill could reduce the deflection of sheet pile compared to coarse agregat for 80% and EPS geofoam for 60%.
Ichsan Rauf, Lawalenna Samang, Tri Harianto and Ardy Arsyad, 2020. Deflection Model of Sheet Pile Wall with the Lightweight Geocomposite Backfill Soil-EPS Stabilized with Waste of Buton Asphalt. Journal of Engineering and Applied Sciences, 15: 1821-1826.