ALTERNATIF PERENCANAAN PERBAIKAN KELONGSORAN LERENG PADA TPA MELONGUANE, KABUPATEN KEPULAUAN TALAUD

Martiani, Dini Nabila (2021) ALTERNATIF PERENCANAAN PERBAIKAN KELONGSORAN LERENG PADA TPA MELONGUANE, KABUPATEN KEPULAUAN TALAUD. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

TPA Melonguane merupakan satu-satunya TPA yang beroperasi di Kabupaten Kepulauan Talaud, tepatnya terletak di Pulau Karakelang. Lokasi dari TPA tersebut di daerah perbukitan dengan kontur bervariasi antara +70,00 hingga +86,00 yang dikelilingi lahan terbuka. Pada awal tahun 2019, TPA Melonguane mengalami kerusakan karena adanya bencana alam berupa tanah longsor. Kelongsoran terjadi di jalan tanah yang difungsikan sebagai jalan menuju IPL. Lalu, pada bulan Agustus 2019 terjadi longsor susulan di lereng dekat bangunan workshop IPLT. Oleh karena itu, perlu dilakukan evaluasi penyebab kelongsoran dan alternatif perbaikannya agar kelongsoran tidak terjadi lagi.
Berdasarkan hasil analisa stabilitas lereng sebelum terjadi kelongsoran, penyebab terjadinya kelongsoran antara lain geometeri lereng yang tidak aman, serta curah hujan yang tinggi ditambah gempa bumi yang melanda Kepulauan Talaud awal tahun 2019. Dalam Tugas Akhir ini, beberapa alternatif perbaikan lereng yang ditawarkan antara lain ialah perkuatan dengan turap, geotextile+subdrain, dan gabion+geotextile.
Dari hasil perhitungan perencanaan perbaikan lereng tersebut didapatkan, 1) Perkuatan sheetpile membutuhkan 2 buah sheetpile dengan panjang masing-masing 15m dan 17m, dipasang selebar 20m area kelongsoran; 2) Perkuatan subdrain+geotextile, geometri lereng dibuat 3 tingkat; lereng bawah dan tengah membutuhkan 8 layer geotextile dengan panjang 5m; lereng atas membutuhkan 11 layer geotextile dengan panjang 5m; serta dimensi subdrain 20cm x 20cm 3) Perkuatan gabion+geotextile, geometri lereng dibuat 3 tingkat; dimensi gabion 50x100x200; lereng bawah dan tengah membutuhkan 4 layer geotextile dengan panjang 4m; lereng atas membutuhkan 6 layer geotextile dengan panjang 4m.
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TPA Melonguane is the only TPA operating in the Talaud Islands Regency, precisely located on Karakelang Island. The location of the landfill is in a hilly area with contours varying between +70.00 to +86.00 which are surrounded by open land. At the beginning of 2019, the Melonguane TPA was damaged due to a natural disaster in the form of a landslide. The landslide occurred on a dirt road that was used as a road to IPL. Then, in August 2019, another landslide occurred on the slope near the IPLT workshop building. Therefore, it is necessary to evaluate the causes of landslides and alternative remedies so that landslides do not occur again.
Based on the results of the slope stability analysis before the landslide occurred, the causes of the landslide included unsafe slope geometry, and high rainfall plus the earthquake that hit the Talaud Islands in early 2019. In this Final Project, several alternative slope improvements offered include reinforcement with sheet pile, geotextile+subdrain, and gabion+geotextile.
From the calculation results of the slope improvement planning, it is found that 1) Sheetpile reinforcement requires 2 sheet piles with a length of 15m and 17m respectively, installed with a width of 20m for the landslide area; 2) Reinforcement of subdrain+geotextile, slope geometry is made in 3 levels; the lower and middle slopes require 8 layers of geotextile with a length of 5m; the upper slope requires 11 layers of geotextile with a length of 5m; and subdrain dimensions 20cm x 20cm 3) Gabion + geotextile reinforcement, slope geometry is made in 3 levels; gabion dimensions 50x100x200; the lower and middle slopes require 4 layers of geotextile with a length of 4m; the upper slope requires 6 layers of geotextile with a length of 4m.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	slope stability, landslide, earthquake, geotextile, sheet pile, gabion, subdrain, stabilitas lereng, longsor, gempa, geotextile, turap, gabion, subdrain
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization T Technology > TA Engineering (General). Civil engineering (General) > TA760+ Retaining walls
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Dini Nabila Martiani
Date Deposited:	31 Jul 2021 16:37
Last Modified:	31 Jul 2021 16:46
URI:	http://repository.its.ac.id/id/eprint/84648

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