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Landslides or commonly called landslides are a disaster that often hits areas with tropical climates. The damage caused by landslides is most dominantly structural damage such as damaged road sections that are cut off. At the research location, there was a landslide that resulted in the obstruction of the road flow which was originally two lanes to one lane, it is feared that landslides will occur again, so one of the landslide prevention techniques is to use retaining walls. Based on this, this study is deemed necessary to determine the slope safety factor and to determine the safety of the slope after using retaining walls. The purpose of this study was to determine the level of slope safety without being given a load, the level of slope safety after being given a load of 25 Kpa and the level of slope safety after being given a load of 25 kpa and the addition of a retaining wall on the research slope using a Retaining Wall. In this study using the Finite Element Method in the calculation to find the level of safety of a slope, the researcher used the help of Plaxis 2D V20 Software, and the results of the calculation obtained a slope safety factor of 1.31, after being given a load of 25 kpa the slope safety factor was 1.14 and after being given a retaining wall the slope safety factor increased to 2.46.

The foundation is a substructure which functions to support the loads and forces caused by the superstructure (superstructure) to the soil layer which will carry these loads and forces. Deep foundations are usually used to obtain a large enough soil bearing capacity and if the depth of the hard soil is far below the ground surface. The aim of this task is to analyze the bearing capacity of pile foundations using sondir data, standard penetration test (SPT) data, as well as the finite element method using the plaxis program. The method used in this final assignment is by studying literature, then collecting the necessary data, and after that carrying out calculation analysis using existing methods. From the results of the calculations carried out, different results were obtained. Where for sondir data at point S1 obtained Qu =115.80 tons; at point S2 obtained Qu = 104.80 tons; at point S3 obtained Qu = 105.50 tons. Meanwhile, based on SPT data at point BH-01, Qu = 398.23 tons, and using the plaxis program Qu = 425 tons

Daya dukung tanah merupakan kemampuan tanah dalam menahan tekanan atau beban dari struktur atas bangunan dengan aman tanpa menimbulkan kegalalan ataupun penurunan. Beberapa metode digunakan untuk menganalisis daya dukung tanah, diantaranya yaitu dengan metode Terzaghi, Mayerhoff, Hasen, Vesic, Oshaki dan menggunakan software dengan parameter dan hasil yang berbeda. Tujuan penelitian ini untuk mengetahui perbandingan daya dukung tanah pondasi dangkal menggunakan metode Terzaghi, Mayerhoff dan software Plaxis 2D. Data sekunder yang digunakan berupa gambar perencanaan dan data tanah hasil uji labolatorium. Berdasarkan analisis menggunakan metode Terzaghi, Mayerhoff dan Software Plaxis 2D diperoleh nilai daya dukung tanah ijin (Qall) secara berurutan sebesar 20,322, 25,612 dan 16,827 t/m2. Berdasarkan hasil daya dukung tanah pondasi dangkal pada metode analitis dan software plaxsis 2D didapatkan bahwa perhitungan daya dukung tanah ijin (Qall) pondasi dangkal metode Meyerhoff lebih besar dari perhitungan metode Terzaghi dan Sofware Plaxis 2D.