Perencanaan Dermaga Curah Urea di Papua Barat untuk Kapal 15.000 DWT

Arrasyid, Ridho (2023) Perencanaan Dermaga Curah Urea di Papua Barat untuk Kapal 15.000 DWT. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Indonesia termasuk salah satu negara dengan cadangan gas alam terbesar di dunia. Menurut data Statistik Minyak dan Gas Bumi 2020 dari Kementerian ESDM, jumlah cadangan gas alam di Indonesia mencapai 62,39 Trillion Cubic Feet (TCF). Indonesia memiliki beberapa kilang gas LNG, salah satunya terletak di Papua Barat. Gas alam berjenis LNG dapat dimanfaatkan untuk kebutuhan industri dan pembuatan pupuk urea. Dalam membangun pabrik pupuk, dibutuhkan infrastruktur untuk melakukan pengiriman hasil produksi pupuk. Seringkali dalam proses pengangkutannya, pupuk urea diangkut dalam bentuk curah kering. Untuk dapat mengangkut curah kering urea dalam jumlah besar pada satu waktu dibutuhkan infrastuktur transportasi berupa pelabuhan. Oleh karena itu, perlu dikembangkan sarana transportasi berupa pelabuhan, termasuk dengan perencanaan dermaga yang sesuai dengan standar. Maka, direncanakan dermaga curah kering yang dapat melayani kapal dengan kapasitas 15.000 DWT berjenis bulk carrier.
Dermaga yang digunakan adalah dermaga bertipe Jetty Open-Pier. Perencanaan dermaga yang dilakukan meliputi evaluasi layout perairan, evaluasi layout dermaga, perhitungan struktur atas meliputi perhitungan struktur atas jetty dan trestle, perhitungan struktur bawah, serta perhitungan kebutuhan fender dan bollard. Dari perencanaan dermaga tersebut dilakukan penentuan metode pelaksanaan meliputi pekerjaan persiapan, pekerjaan konstruksi, pemasangan aksesoris dermaga, dan pekerjaan demobilisasi serta perhitungan rencana anggaran biaya.
Hasil dari perencanaan dermaga curah kering bertipe Jetty Open-Pier meliputi, rekomendasi layout perairan dengan kedalaman minimal -10,5 mLAT. Rekomendasi layout dermaga dengan rincian panjang trestle sebesar 1400 m dengan lebar 8 m, serta struktur jetty dengan panjang 195 m dengan lebar 24 m. Kedua struktur terletak pada elevasi +5.3 mLAT.
Dari hasil perhitungan struktur atas, didapatkan kebutuhan pelat setebal 50 cm pada jetty dan 30 cm pada trestle. Selain itu, kebutuhan balok pada jetty meliputi balok crane (800 x 1200 mm), balok memanjang (500 x 700 mm), balok melintang (500 x 700 mm), dan balok plank fender (1300 x 2800 mm). Pada Trestle dibutuhkan balok memanjang (500 x 700 mm) dan balok melintang (300 x 450 mm). Pada Jetty dibutuhkan poer ganda (2400 x 1200 x 1000 mm) dan poer single (1200 x 1200 x 1000 mm), sedangkan pada trestle dibutuhkan poer single (1200 x 1200 x 1000 mm).
Dari hasil perhitungan struktur bawah didapatkan kebutuhan tiang pancang baja D812 mm dengan tebal 11 mm dan 15 mm untuk struktur jetty. Sedangkan, pada struktur trestle digunakan tiang pancang beton D800 Kelas A.
Pekerjaan yang dilakukan diantaranya pekerjaan persiapan, pekerjaan struktur trestle, pekerjaan struktur jetty, dan pekerjaan instalasi aksesoris dermaga. Dari pekerjaan tersebut, total biaya yang dibutuhkan adalah Rp171,158,670,000.
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Indonesia is one of the countries with the largest natural gas reserves in the world.
According to Oil and Gas Statistics 2020 data from the Ministry of Energy and Mineral
Resources, the number of natural gas reserves in Indonesia reaches 62.39 Trillion Cubic Feet
(TCF). Indonesia has several LNG gas refineries. One of them is in West Papua. LNG type
natural gas can be used for industrial needs and the manufacture of urea fertilizer. To build a
fertilizer factory, infrastructure is needed to deliver fertilizer production. In the process of
transportation, urea fertilizer is transported in the form of dry bulk. To be able to transport large
amounts of dry bulk urea at one time, a port is needed. Therefore, it is necessary to develop
transportation infrastructure in the form of ports, including the planning of jetty in accordance
with standards. Therefore, it is planned that a dry bulk dock can serve ships with a capacity of
15,000 DWT on this type of bulk carrier.
The dock used is a Jetty Open-Pier type. Dock planning includes evaluating the water
layout, evaluating the jetty layout, calculating the upper structure including calculating the jetty,
trestle, and causeway structure, calculating the lower structure, as well as calculating the need
for fenders and bollards. From the planning of the dock, the implementation method is
determined, including preparatory work, construction work, installation of dock accessories,
and demobilization work, as well as the calculation of the budget plan.
The results of dry bulk jetty planning are recommendations for water layouts with a
minimum depth of -10.5 mLAT. Moreover, recommended dock layout with length of trestle is
1400 m and width of trestle is 8 m. Jetty structure with a length of 195 m and a width of 24 m.
Both structures are located at an elevation of +5.3 mLAT.
From the calculation of the superstructure, it is found that the thickness of the slab is 50
cm for the jetty and 30 cm for the trestle. In addition, the beam requirements for the jetty include
crane beams (800 x 1200 mm), longitudinal beams (500 x 700 mm), transverse beams (500 x
700 mm), and plank fender beams (1300 x 2800 mm). Trestle structure required longitudinal
beams (500 x 700 mm) and transverse beams (300 x 450 mm). Jetty requires double poer (2400
x 1200 x 1000 mm) and single poer (1200 x 1200 x 1000 mm), while trestle requires single
poer (1200 x 1200 x 1000 mm).
vii
From the results of the calculation of the substructure, it was found that the pile needed
for jetty are D812 mm steel piles with a thickness of 11 mm and 15 mm. Meanwhile, the trestle
structure uses D800 Class A concrete piles.
The work carried out included preparatory work, trestle structure work, jetty structure
work, and dock accessories installation work. From this work, the total cost required is
Rp171,158,670,000.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Dermaga, Jetty, Open-Pier, Trestle, Curah Kering
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC357 Harbor Engineering. Piers, quays, and wharves
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Ridho Arrasyid
Date Deposited:	26 Jul 2023 02:22
Last Modified:	26 Jul 2023 02:22
URI:	http://repository.its.ac.id/id/eprint/99241

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