Analisis Perbandingan Penggunaan Geosintetik Geotextile Woven dengan Geogrid pada Stabilitas Lereng

Abstract

This design analysis is an analysis of the comparison of reinforcement with the use of Geosynthetic Woven Geotextile and Geogrid reviewing the initial slope conditions. This analysis is intended to determine the slope stability after the addition of geosynthetic reinforcement, a geosynthetic that is quite efficient based on the costs incurred, as well as to determine the results of the analysis using different calculation modeling methods. The process begins by demonstrating the slope stability in the initial conditions that are unsafe and require reinforcement. The reinforcement chosen is geosynthetic. Of the many types of geosynthetics, woven geotextiles and geogrids were chosen in this study as an example of a comparison of the use of geosynthetics on slope stability. The results obtained are the safety factor values from the use of woven geotextiles and geogrids using the same bishop method Macstars; namely 2,027 without an earthquake and 1,118 with an earthquake. The costs incurred for the same volume as using the geogrid is Rp. 4,062,375,000, and with a woven geotextile of Rp. 1,462,455,000. Another difference is in the LongTerm Design Strength (LTDS) tensile strength of the material, which pays attention to various aspects. For the Paralink type geogrid with a tensile strength of 300 kN/m, the LTDS value is 188.842. For Geotextile woven Mactex type with the same tensile strength, the LTDS value is 150 kN/m. The difference in LTDS values indicates the durability of geogrid materials is longer when compared to woven geotextiles so that geogrids are chosen to be more efficient materials for review slopes. In modeling with Slide using the Spencer method, the safety factor value is 1.866 without an earthquake and 1.008 with an earthquake. The difference is caused by the difference in the sliding point, the principle of the calculation method, and the material input in it.