UNSPECIFIED (2025) Alternatif Desain Struktur Dermaga Curah Cair Kapasitas 20.000 DWT Di Area PLTGU, Tanjung Batu, Kalimantan Timur Dengan Metode Beton Pracetak. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dermaga curah cair merupakan infrastruktur penting yang berfungsi sebagai fasilitas sandar dan bongkar muat kapal pengangkut bahan bakar gas. Studi ini merancang dermaga alternatif di PLTGU Tanjung Batu untuk melayani kapal berkapasitas hingga 20.000 DWT. Sistem beton pracetak dipilih sebagai solusi terhadap tantangan konstruksi di Sungai Mahakam, yang memiliki fluktuasi muka air signifikan dan risiko kerusakan lingkungan yang tinggi. Metodologi yang digunakan mencakup pengumpulan data teknis, penyusunan desain awal, analisis struktur menggunakan perangkat lunak, penggambaran elemen struktur, dan penyusunan metode pelaksanaan. Sistem pracetak diterapkan pada berbagai elemen utama guna meningkatkan waktu pelaksanaan dan mutu pekerjaan. Analisis struktur memperhitungkan beban kerja aktual dan kondisi lingkungan setempat. Hasil perencanaan menghasilkan dimensi elemen struktural sebagai berikut: pelat pracetak platform 3200 × 1050 × 350 mm dan trestle 3300 × 1150 × 350 mm; balok U platform 1000 × 800 mm dan balok U trestle 900 × 700 mm; pilecap platform 1750 × 1750 mm dan pilecap trestle 1250 × 1250 mm. Berthing dolphin 5000 × 7000 mm dengan tebal 2000 mm dilengkapi CSS fender 1250 grade 1.6, dan mooring dolphin 3000 × 3000 mm dengan tebal 1500 mm dilengkapi tee bollard kapasitas 22,5 ton. Catwalk dirancang dalam tiga tipe dengan bentang 18 m, 11 m, dan 5 m, lebar 1,5 m dan tinggi 1 m. Pondasi tiang pancang baja Ø700 mm (platform, berthing), Ø600 mm (mooring), dan Ø500 mm (trestle) dipancang hingga kedalaman 46 m. Seluruh sambungan pracetak dirancang dengan panjang penyaluran sesuai standar untuk menjamin kekakuan dan kontinuitas struktur.
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Liquid bulk jetty is an important infrastructure that serves as a berthing and loading facility for ships transporting fuel gas. This study designs an alternative jetty at PLTGU Tanjung Batu to serve vessels with a capacity of up to 20,000 DWT. A precast concrete system was selected as an efficient solution to the construction challenges in the Mahakam River, which has significant water level fluctuations and a high risk of environmental damage. The methodology involved collecting technical data, preparing preliminary designs, analyzing the structure using software, drawing structural elements, and preparing implementation methods. Precast systems were applied to various major elements to improve the efficiency of implementation time and quality of work. The structural analysis took into account the actual work load and local environmental conditions. The planning results yielded the following structural element dimensions: 3200 × 1050 × 350 mm platform precast slab and 3300 × 1150 × 350 mm trestle; 1000 × 800 mm platform U-beam and 900 × 700 mm trestle U-beam; 1750 × 1750 mm platform
pilecap and 1250 × 1250 mm trestle pilecap. Berthing dolphin 5000 × 7000 mm with 2000 mm thickness is equipped with CSS fender 1250 grade 1.6, and mooring dolphin 3000 × 3000 mm with 1500 mm thickness is equipped with 22.5 tons capacity tee bollard. Catwalks are designed in three types with spans of 18 m, 11 m, and 5 m, 1.5 m wide and 1 m high. Steel pile foundations of Ø700 mm (platform, berthing), Ø600 mm (mooring) and Ø500 mm (trestle) were driven to a depth of 46m. All precast connections were designed with standardized channeling lengths to ensure structural rigidity and continuity.
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