PERKUATAN LERENG DENGAN GEOGRID DAN SHEET PILE PADA JALAN KIKIM BESAR (KM. 256) KOTA LAHAT

Abstract

Landslide is one of the most common problems in improving road structures. One of the landslide cases occurred in the area ofKikimBesar, Lahat District precisely at Km.256. To obtain an optimal solution ofthe problem requires proper analysis in the reinforcement of the slope. In this study used an alternative slope reinforcement by using sheet pile or geogrid reinforcement. The purpose of this research is to know the condition ofnatural slope stability at that location and the effect ofstability slope change with retrofitting structure using sheet pile or geogrid. This research uses modeling with Plaxis 2D program. Modeling was made to obtain the safety factor values on the natural slopes on the slopes 1-1, 2-2, and 3-3 pieces, comparing the safety factor of each slope before and after the reinforcement, and comparing the safety factor ofeach slope after reinforcement using geogrid type UX 1700 and sheet pile type W325 A 1000. From the research results obtained that the strengthening of geogrid and sheet pile can increase the value of slope safety factor. The sheet pile modeling has the greatest safety factor value for each slope of1.794 for slopes 2-2 and 1,532 for slopes 3-3 compared with geogrid reinforcement that produces a safety factor value of 1,325 for slopes 2-2 and 1,343 for slopes 3-3 pieces.