Analisis Kerentanan Tanah Dinding Open Channel Melalui Data Resistivitas Konfigurasi Wenner-Schlumberger (Studi Kasus: Kecamatan Manyar, Kabupaten Gresik)

Pramodya, Mirza Rifada (2019) Analisis Kerentanan Tanah Dinding Open Channel Melalui Data Resistivitas Konfigurasi Wenner-Schlumberger (Studi Kasus: Kecamatan Manyar, Kabupaten Gresik). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada wilayah JIIPE (Java Integrated Industrial and Ports Estate) didapatkan beberapa titik pada open-channel mengalami longsor, kelongsoran terjadi karena penambahan volume dari batuan yang ada di daerah dinding open channel, batuan pondasi yang kurang kuat untuk menahan, dan kemiringan lereng yang terlalu curam. Penyebab kelongsoran tersebut dapat diketahui melalui pemodelan data geolistrik sehingga didapat geometri bawah permukaan melalui penampang resistivitas. Penampang 2D kemudian dimodelkan menggunakan perangkat lunak GEO5 2019 Slope Stability untuk mendapat nilai faktor keamanan. Data pemodelan berasal dari penampang resistivitas, model awal dan model lempung, serta dimasukkan data kuat tekan, sudut geser dalam dan kohesi dari batuan penyusun di tempat tersebut. Didapat faktor keamanan dari model lempung, lempung dan limestone, GL-01, dan GL-04 masing-masing sebesar 0.95, 1.60, 2.07, 1.46. Berdasarkan nilai faktor keamanan, akan diketahui peran limestone sebagai penguat atau beban sehingga bisa dibuat model yang lebih efektif. Berdasarkan penelitian ini dapat disimpulkan bahwa terjadi penurunan pada lapisan lempung setelah dilakukan penimbunan, nilai faktor keamanan pada daerah yang diteliti sebesar 2.07 dan 1.46, serta model yang efektif dengan ketebalan timbunan 1.3m hingga 1.4m dan penghematan hingga 13.3%.
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JIIPE (Java Integrated Industrial and Ports Estate) area has some landslide spot at open-channel building site, landslide can be occur because of volume addition of rock in open-channel's area, the foundation material which not strong enough to hold the structure, and have too steep slope. Those factor can be identified from geoelectric modelling, so we will get the subsurface geometry from 2D resistivity model. This 2D model will be modelled with GEO5 2019 Slope Stability software to get the safety factor value. Data will be gathered from 2D resistivity model, initial model, and clay model. Compressive strength, angle of internal friction and cohesion data will be needed to determine the material value. Safety factor from clay model, clay and limestone model, GL-01 model, GL-04 model will have a result varies from 0.95, 1.60, 2.07, 1.46. From these safety factor value, the limestone role can be described as a reinforcement or as a burden, so the effective model can be modelled. Based on this research, the conclusion is degradation happen in the clay layer after accumulation activities, safety factor value at research area is 2.07 and 1.46, and the effective model has accumulation thickness of 1.3m and 1.4m which have a savings value up to 13.33%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Faktor Keamanan, Limestone, Resistivitas
Subjects:	Q Science > QE Geology > QE599 Landslides. Rockslides
Divisions:	Faculty of Civil, Environmental, and Geo Engineering > Geophysics Engineering > 33201-(S1) Undergraduate Theses
Depositing User:	Pramodya Mirza Rifada
Date Deposited:	23 Jul 2026 02:08
Last Modified:	23 Jul 2026 02:08
URI:	http://repository.its.ac.id/id/eprint/66252

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