Permodelan Struktur Bangunan Pengaman Pantai Tukadmungga, Kabupaten Buleleng, Bali Dengan Ansys

Arismunandar, Sunu Juand (2024) Permodelan Struktur Bangunan Pengaman Pantai Tukadmungga, Kabupaten Buleleng, Bali Dengan Ansys. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kabupaten Buleleng adalah salah satu kabupaten di Provinsi Bali yang memiliki garis pantai terpanjang, yaitu sepanjang 157,05 km. Sepanjang kawasan pantai tersebut menghadapi permsalahan abrasi akibat tingginya pasang dan gelombang laut. Upaya pemerintah untuk mencegah perubahan garis pantai dilaksanakan proyek "Pekerjaan Pembangunan Prasarana Pengamanan Pantai Ruas Buleleng - Tejakula" dengan tipe bangunan revetment. Salah satu lokasi pekerjaan tersebut di Pantai Tukadmungga. Namun pada kedelapan ruas pantai tersebut digunakan desain tipikal. Dimana tiap pantai memiliki karakteristik yang berbeda – beda. Sehingga perlu dilakukan analisis dan pengolahan data untuk mengembangkan alternatif desain yang lebih sesuai dengan karakteristik dari setiap pantai yang dikerjakan. Dalam penelitian ini menganalisis data pencatatan angin satelit yang selanjutnya didapatkan data tinggi dan periode gelombang. Selanjutnya dianalisis elevasi muka air laut rencana yang didapatkan dari analisis pasang surut, wave setup, wind setup, pemanasan global dan run up. Dari elevasi muka air laut rencana tersebut digunakan dalam perencanaan desain alternatif yang stabil serta mampu menahan abrasi dan limpasan gelombang. Hasil analisis penelitian ini pada arah dominan didapatkan tinggi gelombang 0,402 m dengan periode 3,339 detik. Lalu elevasi muka air laut rencana akibat wave setup, wind setup, pemanasan global dan run up dalam kondisi Highest High Water Level (HHWL), yaitu +4,22 m. Desa in alternatif bangunan pengaman pantai direncanakan mampu menahan limpasan gelombang, maka direncanakan elevasi puncak bangunan pada +4,40 m. Dalam penelitian ini direncanakan 2 desain alternatif, yaitu curve sea wall dan sheet pile tipe CCSP. Desain curve sea wall dianalisa stabilitas dan didapatkan FS guling dalam kondisi gempa 8,263 dan dalam kondisi normal 10,084, FS geser dalam kondisi gempa 3,00 dan dalam kondisi normal 3,366, FS daya dukung tanah kondisi dalam kondisi gempa 6,055 dan dalam kondisi normal 5,784. Sedangkan desain CCSP dianalisa stablitas dengan menghitung tegangan lateral yang bekerja pada sheet pile dan didapatkan desain CCSP yang stabil adalah dengan panjang 11,60 m dengan tebal 6,30 cm dalam kondisi normal dan 6,45 cm dalam kondisi gempa. Namun CCSP dipasaran memiliki ketebalan 11-12 cm sehingga digunakan tebal 11 cm. Juga dianalisis stabilitas bangunan revetment eksisting didapatkan FS slope dalam kondisi gempa 1,293 dan dalam kondisi normal 1,425. Selanjutnya desain yang telah dianalisis stabilitas disimulasikan kedalam program Ansys dan dihitung RAB untuk tiap desainnya. Didapatkan harga harga desain eksisting Rp8,920,517,000.00, harga desain curve sea wall Rp11,284,163,000.00, dan harga desain CCSP Rp14,513,205,000.00.
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Buleleng Regency is one of the regencies in Bali Province that has the longest coastline, which is 157.05 km long. Along the coastal area faces abrasion problems due to high tides and ocean waves. The government's effort to prevent changes in the coastline was carried out by the “Buleleng - Tejakula Section Coastal Security Infrastructure Development Work” project with a revetment building type. One of the locations was Tukadmungga Beach. However, in all eight sections of the beach, a typical design was used. Where each beach has different characteristics. So it is necessary to analyze and process data to develop alternative designs that are more in accordance with the characteristics of each beach being worked on. This research analyzes satellite wind logging data which then obtains wave height and period data. Furthermore, the planned sea level elevation obtained from the analysis of tides, wave setup, wind setup, global warming and run up is analyzed. The planned sea level elevation is used in planning alternative designs that can withstand abrasion and effective wave runoff. The results of this research analysis in the dominant direction obtained a wave height of 0.402 m with a period of 3.339 seconds. Then the planned sea level elevation due to wave setup, wind setup, global warming and run up in the Highest High Water Level (HHWL) conditions, which is +4.22 m. The alternative design of the coastal safety building is planned to be able to withstand wave runoff, so the peak elevation of the building is planned at +4.40 m. In this study, 2 alternative designs were planned, namely curve sea wall and CCSP type sheet pile. The curve sea wall design was analyzed for stability and obtained FS overturning in earthquake conditions 8.263 and in normal conditions 10.084, FS shear in earthquake conditions 3.00 and in normal conditions 3.366, FS bearing capacity of soil conditions in earthquake conditions 6.055 and in normal conditions 5.784. While the CCSP design was analyzed for stability by calculating the lateral stresses acting on the sheet pile and obtained a stable CCSP design with a length of 11.60 m with a thickness of 6.30 cm under normal conditions and 6.45 cm under earthquake conditions. However, the CCSP in the market has a thickness of 11-12 cm so 11 cm thickness is used. Also analyzed the stability of the existing revetment building obtained FS slope under earthquake conditions 1.293 and under normal conditions 1.425. Furthermore, the design that has been analyzed for stability is simulated into the Ansys program and calculated RAB for each design. It was obtained that the price of the existing design price was IDR 8,920,517,000.00, the price of the curve sea wall design was IDR 11,284,163,000.00, and the CCSP design price was IDR 14,513,205,000.00.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Revetment, CCSP, Sea Wall, Ansys, RAB
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC335 Sea-walls--Design and construction
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Sunu Juand Arismunandar
Date Deposited:	13 Aug 2024 05:13
Last Modified:	13 Aug 2024 05:13
URI:	http://repository.its.ac.id/id/eprint/112933

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