Analisis Pengaruh Scouring Terhadap Stabilitas Kelongsoran Pada Revetment Di Pantai Matahari Terbit Sanur Denpasar Bali

Okta, Fathomi (2021) Analisis Pengaruh Scouring Terhadap Stabilitas Kelongsoran Pada Revetment Di Pantai Matahari Terbit Sanur Denpasar Bali. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bangunan pelindung pantai dibangun dengan fungsi melindungi dan mencegah agar daerah pantai tidak terjadi abrasi atau erosi. Salah satu bangunan pelindung pantai yang ada saat ini adalah dinding pantai (revetment). Pada bangunan peindung pantai sering terjadi kegagalan struktur yang menyebabkan rusak dan hancurnya bangunan pelindung pantai itu sendiri. Salah satunya adalah gerusan tanah (scouring). Scouring adalah perpindahan material dari tanah dasar laut yang disebabkan arus dan gelombang dimana prosesnya sama dengan erosi. Penelitian ini bertujuan untuk mengetahui faktor yang mempengaruhi kedalaman scouring maksimum dan pengaruh scouring terhadap stabilitas kelongsoran. Lokasi penelitian ini dilakukan di pantai Matahari Terbit Sanur Denpasar, Bali. Perhitungan stabilitas kelongsoran menggunakan bantuan software geoslope dan perhitungan manual. Adapun variasi yang digunakan adalah batu pelindung (batu kali, tetrapod, dan BPPT Lock), kemiringan struktur (1:1,15 ; 1:1,5 ; 1:2) dan periode ulang gelombang (25 tahun, 50 tahun, dan 100 tahun). Pada hasil perhitungan desain struktur revetment didapatkan 27 variasi desain. Nilai scouring maksimum yang terjadi pada 27 desain revetment yaitu 1,614 m untuk periode ulang gelombang 25 tahun, 1,869 m untuk periode ulang gelombang 50 tahun, dan 2,127 m untuk periode ulang gelombang. Diketahui bahwa faktor yang mempengaruhi kedalaman scouring maksimum adalah tinggi gelombang signifikan, kedalaman air, dan periode gelombang. Hasil perhitungan stabilitas kelongsoran menunjukkan bahwa scouring berpengaruh terhadap angka safety factor meskipun relatif kecil.
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Coastal protection buildings are built with the function of protecting and preventing coastal areas from abrasion or erosion. One of the existing coastal protection buildings is a beach wall (revetment). In coastal protection buildings, structural failures often occur which cause damage and destruction of the coastal protective buildings themselves. One of them is soil scouring. Scouring is the movement of material from the seabed caused by currents and waves where the process is the same as erosion. This study aims to determine the factors that affect the maximum scouring depth and the effect of scouring on landslide stability. The location of this research was carried out on the Matahari Terbit beach of Sanur Denpasar, Bali. Calculation of landslide stability using geoslope software and manual calculations. The variations used are protective stones (river stone, tetrapod, and BPPT Lock), the slope of the structure (1:1,15; 1:1,5; 1:2) and wave return periods (25 years, 50 years, and 100 years). year). The results of the calculation of the revetment structure design obtained 27 design variations. The maximum scouring value that occurs in the 27 revetment designs is 1,614 m for the 25 year wave return period, 1,869 m for the 50 year return wave period, and 2,127 m for the wave return period. It is known that the factors that affect the maximum scouring depth are significant wave height, water depth, and wave period. The results of the landslide stability calculation show that scouring has an effect on the number of safety factors although it is relatively small.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Revetment, Scouring, Landslide Stability, Geoslope, Matahari Terbit Beach Revetment, Scouring, Stabilitas Kelongsoran, Geoslope, Pantai Matahari Terbit
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC333 Breakwaters T Technology > TH Building construction T Technology > TH Building construction > TH1461 Concrete construction.
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Fathomi Okta Wira Utama
Date Deposited:	17 Aug 2021 17:05
Last Modified:	17 Aug 2021 17:05
URI:	http://repository.its.ac.id/id/eprint/87142

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