Electronic Theses and Dissertation

Abstrak ruas jalan yang membentang pada topografi perbukitan dengan kemiringan lereng yang curam sangat beresiko terhadap terjadinya kelongsoran. berdasarkan studi literatur menunjukkan bahwa lereng pada ruas jalan raya banda aceh- lhokseudu km 30 dan km 31, kecamatan leupung, aceh besar tersebut termasuk kedalam jenis batuan gamping. penelitian ini dilakukan dengan tujuan untuk mengetahui potensi dan jenis longsoran yang akan terjadi berdasarkan analisis kinematik serta memberikan penilian terhadap kualitas massa batuan berdasarkan klasifikasi massa batuan rock mass rating (rmr) dan slope mass rating (smr). penelitian ini menggunakan metode scanline dengan panjang total keseluruhan lereng. hasil analisis kinematik pada ruas jalan km 30 yaitu terdapat 4 longsoran yang berpotensi terjadi diantaranya longsoran baji (perpotongan joint set 1 dan joint set 3), longsoran baji (perpotongan joint set 1 dan joint set 5), longsoran bidang (joint set 3), dan longsoran bidang (joint set 2) dengan nilai bobot rmr sebesar 66.40 dan bobot smr untuk ke-4 jenis longsoran tersebut adalah 23.02, 49.57, 45.97 dan 66.37. sedangkan pada km 31 terdapat 3 longsoran jenis baji yang berpotensi yaitu (perpotongan joint set 1 dan joint set 2), (perpotongan joint set 2 dan joint set 3), dan (perpotongan joint set 1 dan joint set 3) dengan nilai bobot rmr 68.22 dan nilai bobot smr berturut-turut 17.22, 62.92 dan 60.72. hasil kesimpulan dari penelitian ini yaitu lereng di km 30 diklasifikasikan ke dalam kelas iv (buruk) dan potensi terjadinya longsor sebesar 60% sedangkan lereng di km 31 diklasifikasikan ke dalam kelas v (sangat buruk) dan potensi terjadinya longsor sebesar 90%. kata kunci: lereng, kestabilan lereng, analisis kinematik, rock mass rating (rmr) dan slope mass rating (smr). abstract roads that stretch on hills topography with steep slopes are very risky for landslides. based on literature studies show that the slopes on the banda acehlhokseudu highway km 30 and km 31, leupung sub-district, aceh besar are included in the type of limestone. this study was conducted with the aim to determine the potential and types of landslides that will occur based on kinematic analysis and provide an assessment of rock mass quality based on rock mass classification rock mass rating (rmr) and slope mass rating (smr). this study uses the scanline method with the total length of the overall slope. the results of kinematic analysis on km 30 road section are 4 landslides that have the potential to occur including wedge landslides (joint set 1 intersection and joint set 3), wedge landslide (joint set 1 intersection and joint set 5), planar landslides (joint set 3), and planar landslides (joint set 2) with a weight value of rmr of 66.40 and the weight of the smr for the 4 types of landslides are 23.02, 49.57, 45.97 and 66.37. whereas in km 31 there are 3 potential wedge landslides that are (joint set 1 and joint set 2 intersections), (joint set 2 and joint set 3 intersections), and (joint set 1 and joint set 3 intersections) with a weight of rmr 68.22 and the value of the smr weights are 17.22, 62.92 and 60.72. the conclusion of this study is that the slopes in km 30 are classified into class iv (bad) and the potential for landslides is 60% while the slopes in km 31 are classified into class v (very poor) and the potential for landslides is 90%. keywords: slope, slope stability, kinematic analysis, rock mass rating (rmr) and slope mass rating (smr).