Perencanaan Perkuatan Lereng Menggunakan Geoframe di Jalan Raya Dampit-Lumajang

Abstract

A Landslide is the movement of soil mass or rock constituents down the slope due to disturbance of soil stability. One of the factors that affect soil stability is the rainy season as happened in Sumberwuluh Village, Candipuro District, Lumajang Regency. The alternative used to stabilize the slope is by changing the slope geometry, then adding geoframe reinforcement. This study aims to determine the value of the factor of safety (SF) of unreinforced slopes, after changing the slope geometry, and after being given geoframe reinforcement. The method used in analyzing slope stability is the Ordinary/Fellenius method. The results of the calculation of slope stability without reinforcement using the Rocscience Slide software obtained a SF of 0.719, while the manual calculation obtained a SF of 0.7191. The two values ​​of the safety factor are less than 1.25, which means that landslides often occur. The results of the calculation of slope stability after changing the geometry of the slopes obtained a SF of 0.828 where the value is less than 1.25 which means that landslides often occur. The slopes that have been changed geometry are added with geoframe reinforcement. The results of the calculation of slope stability using geoframe reinforcement obtained a SF of 1.315 where the value is more than 1.25 which means that landslides are rare or slope in a safe condition.

Penggunaan Counterweight Dan Soil Nailing Sebagai Alternatif Perkuatan Lereng Sungai Gandong Magetan Jawa Timur Pasca Longsor

“…Cara yang dapat dilakukan untuk meningkatkan stabilitas lereng ialah merubah geometri lereng, menurunkan muka air tanah, memasang tiang-tiang dll (Hardiyatmo, 2003). Pengubahan geometri lereng yang dapat dilakukan ialah dengan pemotongan dan penimbunan pada area longsor (Alyazahari et al, 2022). Terasering (counterweight) merupakan suatu metode yang digunakan untuk mengurangi panjang lereng atau mengurangi kemiringan lereng sehingga lereng landai dengan cara penggalian atau penimbunan.…”