Putri, Puspa Devita Mahdika (2016) Analisa Beban Gelombang Pada Dinding Vertikal Struktur Perpanjangan Jetty PLTGU Grati. Undergraduate thesis, Institut Technology Sepuluh Nopember.
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Abstract
Jetty eksisting penahan sedimentasi di depan water intake canal Perusahaan Listrik
dan Tenaga Gas dan Uap (PLTGU) Grati tidak mampu bekerja maksimal sehingga
harus dilakukan pengerukan setiap tahun. Untuk itulah, dibangun struktur
perpanjangan jetty baru agar sedimentasi di dekat kanal bisa berkurang. Layout
jetty perpanjangan telah diteliti oleh Atikasari (2015). Karena jetty perpanjangan
dibangun di kedalaman yang berbeda dengan kondisi eksisting, maka dilakukan
analisa beban gelombang pada dinding vertikal struktur perpanjangan jetty. Dalam
penelitian ini, analisa beban gelombang dilakukan dengan membandingkan dua
metode yaitu metode Minikin dan Goda. Berdasarkan hasil analisa, metode
Minikin menghasilkan gaya dan tekanan gelombang yang jauh lebih besar daripada
Goda. Penulis menggunakan beberapa rekomendasi dari penelitian sebelumnya
untuk menentukan metode perhitungan beban gelombang yang sesuai dengan
kondisi di lokasi pembangunan struktur perpanjangan jetty PLTGU Grati.
Berdasarkan hasil analisa, struktur perpanjangan jetty PLTGU Grati berada pada
dasar laut yang bervariasi dan mengalami overtopping, sehingga metode
Minikin lebih sesuai digunakan. Karakteristik gelombang yang mulai pecah tepat di
depan struktur juga sesuai dengan asumsi Minikin. Selain itu, struktur
perpanjangan jetty PLTGU Grati termasuk bangunan rigid sehingga penggunaan
metode Minikin lebih dianjurkan.
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The existing sedimentation retaining jetty in front of the water intake canal of
Perusahaan Listrik Tenaga Gas dan Uap (PLTGU) Grati is not able to work
optimally, so the company must dredge that location every year. For that, a new
jetty extension structure must be built to reduce sedimentation near the canal. The
layout of jetty extension structure has been investigated by Atikasari (2015). Due
to the extension of the jetty built at different depths with the existing condition,
then the wave load analysis on vertical wall of new structure is needed. In this
study, the wave load analysis is done by comparing the two methods by Minikin
(1963) and Goda (1974). Based on this analysis, the Minikin method generate
larger value of wave loads than Goda. The author uses some of the
recommendations from previous studies to determine the method of calculation of
wave loads according to conditions at the jetty extension construction site of
PLTGU Grati. Based on this analysis, the structure of jetty extension of PLTGU
Grati is built at varying seabed (m≥0) and overtopping is occured, so the Minikin
method more suitable. Characteristics of the wave that starts to break directly in
front of the structure is also consistent with the Minikin’s assumption. In addition,
the jetty extension structure of PLTGU Grati is a rigid construction, so that the use
of Minikin method more recommended.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 627.31 Put a |
| Uncontrolled Keywords: | jetty, gelombang, Goda, Minikin, beban, gaya, tekanan, dinding |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC357 Harbor Engineering. Piers, quays, and wharves |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 07 Jan 2020 07:51 |
| Last Modified: | 07 Jan 2020 08:14 |
| URI: | http://repository.its.ac.id/id/eprint/72578 |
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