Perencanaan Dinding Penahan Tanah Kantilever Pada Embung PT. X Di Long Wehea (Kalimantan Timur) yang Dipengaruhi Oleh Perubahan Muka Air Embung - Submit Jurnal

Artanti, Sahda (2025) Perencanaan Dinding Penahan Tanah Kantilever Pada Embung PT. X Di Long Wehea (Kalimantan Timur) yang Dipengaruhi Oleh Perubahan Muka Air Embung - Submit Jurnal. Bachelor thesis, Institut Teknologi Kalimantan.

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Abstract

Kerusakan tanggul di sekitar pintu air embung PT. X di Long Wehea, Muara Wahau, Kabupaten Kutai Timur, Kalimantan Timur, terjadi akibat gerusan (scouring) tanah yang dipicu oleh aliran air dari sistem buka-tutup pintu air. Aliran tersebut menyebabkan hilangnya material tanah di sekitar kaki tanggul, sehingga memerlukan upaya perkuatan untuk menjaga kestabilan struktur embung. Salah satu solusi yang dapat diterapkan adalah perencanaan dinding penahan tanah (DPT) tipe kantilever. DPT tipe ini dipilih karena memiliki tingkat stabilitas yang tinggi serta umur layanan yang panjang, sebagaimana dibuktikan dalam berbagai studi terdahulu. Untuk mengatasi permasalahan tersebut, dilakukan perencanaan desain DPT kantilever yang aman terhadap gaya geser (SF ≥ 1,5), guling (SF ≥ 2), dan daya dukung tanah (SF ≥ 3), akibat perubahan muka air embung dalam tiga kondisi saat kering, normal, dan banjir. Analisis stabilitas dilakukan menggunakan teori Rankine dan pemodelan dengan metode Limit Equilibrium Method (LEM). Hasil perencanaan menghasilkan desain akhir DPT dengan tinggi 3 m, lebar fondasi 2,1 m, dan kedalaman fondasi 0,3 m. Kebutuhan tulangan ditentukan sebagai tulangan lentur D13-250 mm pada dinding dan D13-300 mm pada fondasi. Hasil analisis menunjukkan bahwa DPT dalam 15 kondisi muka air embung dinyatakan aman, dengan nilai SF geser ≥ 1,5, SF guling ≥ 2,0, dan SF daya dukung ≥ 3,0. Pada kondisi muka air kering (A1–A5), diperoleh SF geser 3,08–1,61, SF guling 5,07–2,55, dan SF daya dukung 9,22–7,16. Saat muka air normal (B1–B5), SF geser berada pada rentang 3,93–2,06, SF guling 5,84–2,96, dan SF daya dukung tetap 9,22–7,16. Sedangkan pada kondisi banjir (C1–C5), SF geser mencapai 4,49–2,36, SF guling 6,50–3,31, dan SF daya dukung tanah tetap stabil di angka 9,22–7,16.

Item Type: Thesis (Bachelor)
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Divisions: Jurusan Teknik Sipil dan Perencanaan > Teknik Sipil
Depositing User: Sahda Artanti
Date Deposited: 10 Jul 2025 01:31
Last Modified: 10 Jul 2025 01:31
URI: http://repository.itk.ac.id/id/eprint/23464

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