Tesis ANALISIS KELONGSORAN DAN FAKTOR KEAMANAN TERHADAP KERUSAKAN BADAN JALAN DIPERKUAT DENGAN RETAINING WALL TIPE KANTILEVER DAN MINI PILE MENGGUNAKAN PROGRAM PLAXIS VERSI 8.6 Banta Usman NIM.1704201010051 Program Studi Magister Teknik Sipil Jurusan Teknik Sipil-Fakultas Teknik Universitas Syiah Kuala Abstrak Ruas Jalan Batas Aceh Tengah/Gayo Lues-Blangkejeren Km 438+800 yang berada di Kabupaten Gayo Lues merupakan salah satu ruas jalan Nasional lintas tengah yang menghubungkan Kota Takengon dengan Kabupaten Gayo Lues dan Aceh Tenggara menuju Sumatera Utara. Ruas jalan tersebut sering terjadi tanah longsor karena berada di daerah pegunungan. Peristiwa tanah longsor yang terjadi disebabkan oleh intensitas curah hujan yang tinggi dan aliran air pada drainase badan jalan serta tidak adanya bangunan pengarah aliran air pada ujung drainase, sehingga air terbuang di bahu jalan dan air meresap ke badan jalan yang dapat menyebabkan berat volume tanah bertambah. Hal ini dapat meningkatkan gaya pendorong menjadi besar akibat bertambahnya massa tanah pada tubuh lereng tersebut. Dengan demikian, maka diperlukan analisis kelongsoran serta penanganan dengan menggunakan dinding penahan tanah Kata kunci : Tanah Longsor, Plaxis 2D, Kantilever, MiniPile, Faktor Keamanan i Thesis ANALYSIS OF LANDSLIDES AND SAFETY FACTORS ON ROAD DAMAGE STRENGTHENED WITH RETAINING WALL TYPE CANTILEVER AND MINIPILE USING PLAXIS PROGRAM VERSION 8.6 Banta Usman NIM.1704201010051 Civil Engineering Magister Study Program Department of Civil Engineering-Faculty of Engineering Syiah Kuala University Abstract The Central Aceh / Gayo Lues-Blangkejeren Border Road Section Km 438 + 800 located in Gayo Lues Regency is one of the National roads that connects Takengon City and Gayo Lues Regency and also Southeast Aceh towards North Sumatra. Landslides often occur in this land area. The landslides caused by the complexity of high rainfall and water flow in the drainage of the road which there are no buildings that direct the water flow to the drainage. The water was wasted on the roadside and seep into the road which soil volume increased as the result. This has been increased the total of the soil mass on the slope. Thus, it is necessary to analyze and overcome the landslide by using cantilever and minipile type as the soil retaining wall. This analysis aims to find out the slip surface and the number of safety factors. Analysis will be carried out to understand the slope’s slip surface and the number of safety factors using the 2D Plaxis program. Based on the research, the calculation of slope stability before and after retrofitting was done at 438 + 800 Km, 438 + 825 Km and 438 + 850 Km. The results of the analysis of the slopes under existing conditions by using the 2D Plaxis program at all points obtained from the number of safety factors is 1.087, 1,011 and 1,008 with unsafe slope conditions Keywords: Landslide, 2D Plaids, Cantilever, Minipile, Safety Factor ( ii