Ramadhan, Muhammad Fauzan Arif (2026) Analisis Perencanaan Eksisting Dan Perkuatan Tambahannya Pada Struktur Dermaga (Jetty dan Trestle) Di Proyek Pembangunan PLTU 4 X 7 MW Timika, Papua. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Peningkatan kebutuhan energi listrik dalam negeri menuntut pemerintah melakukan ekspansi infrastruktur ketenagalistrikan di berbagai wilayah, termasuk wilayah timur Indonesia. Pemerintah melalui PT PLN (Persero) merencanakan proyek pembangunan PLTU 4 x 7 MW Timika, Kabupaten Mimika, Papua sebagai salah satu langkah strategis. Fasilitas pendukung utama dalam proyek ini adalah struktur jetty dan trestle yang dirancang untuk melayani kapal tongkang (barge) berkapasitas 5.000 DWT dengan draft 3,5 meter. Tugas akhir ini bertujuan untuk mengevaluasi desain fondasi eksisting dan meredesain struktur bawah akibat adanya peningkatan kedalaman kolam jetty. Analisis dilakukan menggunakan bantuan program bantu SAP2000 untuk menganalisis gaya dalam yang bekerja pada satu tiang dan GEO5 untuk analisis stabilitas penahan tanah. Hasil verifikasi menunjukkan bahwa perencanaan fondasi eksisting menggunakan Steel Pipe Pile (SPP) diameter 508 mm (t = 11,9 mm) memenuhi kriteria keamanan dengan nilai faktor keamanan (safety factor) sebesar 2,5 menggunakan metode perhitungan daya dukung (Overseas Coastal Area Development) OCDI. Namun, kondisi kedalaman kolam dermaga eksisting (river bed) tidak memenuhi kriteria kedalaman alur pelayaran yang aman. Oleh karena itu, dilakukan redesain melalui pengerukan (dredging) sedalam 5 meter dari elevasi ± 0,00 LWS hingga mencapai elevasi -5,00 meter LWS. Konsekuensi dari peningkatan kedalaman tersebut menuntut perubahan spesifikasi struktur bawah. Berdasarkan hasil analisis redesain, penggunaan fondasi tipe SPP diameter 700 mm (t = 12 mm) memenuhi kriteria keamanan. Selain itu, diperoleh hasil analisis metode Rowe yang memerlukan konstruksi penahan tanah berupa Steel Pipe Sheet Pile (SPSP) tipe P-P diameter 500 mm (t = 12 mm) yang diperkuat menggunakan ground anchor (13 strands ukuran 15,2 mm) dengan free length 13,5 meter dan panjang grouting 13,5 meter, serta kepala angkur tipe 13C15. Hasil evaluasi dan perencanaan ini diharapkan menjadi referensi teknis bagi pihak pelaksana dalam melanjutkan proyek PLTU 4 x 7 MW Timika.
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The increasing national demand for electrical energy necessitates the expansion of power infrastructure across various regions, particularly in Eastern Indonesia. As a strategic measure, PT PLN (Persero) planned the construction of the 4 x 7 MW Timika Steam Power Plant (PLTU) in Mimika, Papua. The primary supporting facilities for this project include jetty and trestle structures, designed to serve 5,000 DWT barges with a 3.5 meter draft. This final project aims to evaluate the existing foundation design and redesign the substructure due to an increase in the jetty basin depth. The analysis was conducted using SAP200O software to analyze the internal forces acting on a single pile and GEO5 for soil-retaining wall stability analysis. Verification results indicate that the existing foundation design, using 508 mm diameter Steel Pipe Piles (SPP) (t = 11,9 mm), meets the safety criteria with a safety factor of 2.5, based on the Overseas Coastal Area Development (OCDI) bearing capacity calculation method. However, the existing riverbed depth does not meet the safety requirements for navigable channel. Consequently, a redesign was performed through dredging to a depth of 5 meters from elevation ± 0,00 LWS to reach a final elevation of -5,00 meters LWS. The increase in depth necessitates modifications to the substructure specifications. Based on the redesign analysis, the use of 700 mm diameter SPP (t = 12 mm) meets the safety criteria. Furthermore, the analysis using Rowe’s Method indicates the requirement for a soil-retaining structure consisting of P-P type Steel Pipe Sheet Piles (SPSP) with a 500 mm diameter (t = 12 mm). This structure is reinforced with ground anchors (13 Strands, 15,2 mm size) featuring a free length 13.5 meters and a grouting length 13.5 meters, utilized with a 13C15 type anchor head. The results of this evaluation and planning are expected to serve as a technical reference for contractors in proceeding with the 4 x 7 MW Timika Steam Power Plant Project.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Metode OCDI, Metode Rowe, Jetty, Trestle, Steel Pipe Pile, Steel Sheet Piles, Ground Anchor, OCDI Method, Rowe Method, Jetty, Trestle, Steel Pipe Pile, Steel Sheet Piles, Ground Anchor |
| 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) > TA760+ Retaining walls T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations. T Technology > TA Engineering (General). Civil engineering (General) > TA780 Piles and pile-driving |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Fauzan Arif Ramadhan |
| Date Deposited: | 28 Jul 2026 08:45 |
| Last Modified: | 28 Jul 2026 08:45 |
| URI: | http://repository.its.ac.id/id/eprint/138701 |
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