DESAIN ULANG BADAN JALAN DENGAN GEOTEKSTIL SEBAGAI ALTERNATIF PENINGKATAN STABILITAS LERENG

Abstract The condition of Ciawi – Sukabumi Toll Road section 2 has various topographies with difference elevation. To get a safe and comfortable road alignment, cut fill works are carried out. During the landfill work at STA.18 + 700 900 landslides occurred on slopes. ensure that slope conditions during service period, redesign bodies is out to produce slopes safety factor value (SF) ≥ 1.25 (Bowles, 1993) SF 1.10 if earthquake calculated (SNI 8460: 2017). stability phase original by taking into account potential for earthquakes research location. This analysis was manual calculations GeoStudio 2018 R2 sub program SLOPE/W, both using Simplified Bishop Method. results sliding obtained without considering 1.48 1.41 SLOPE/W. Then effect 0.79 0.82 it found all basic sliding. showed had significant impact stability, decrease in 44.23% categorized as unstable. Then, recommended add woven geotextile tensile strength 200 kN river stone gabion counterweight. From modeling each been simulated, countermeasures Type III 1.15 redesign. . Keywords: Bishop, Geotextile, Safety factor, Slope