Perencanaan Ulang Pelimpah (spillway) Dengan Tipe Pelimpah Langsung Pada Bendungan Tapin, Kabupaten Tapin, Provinsi Kalimantan Selatan

Narwastu, Simeon Adita (2022) Perencanaan Ulang Pelimpah (spillway) Dengan Tipe Pelimpah Langsung Pada Bendungan Tapin, Kabupaten Tapin, Provinsi Kalimantan Selatan. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 03111640000165-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2024. Download (8MB) | Request a copy

Abstract

Bendungan Tapin telah diresmikan pada 18 Januari 2021. Bendungan ini dibangun untuk memenuhi kebutuhan air baku, air irigasi, pembangkit listrik, sekaligus untuk penanganan banjir di Provinsi Kalimantan Selatan. Bendungan Tapin adalah bendungan dengan tipe Timbunan Batu Zonal Inti Tegak dengan ketinggian bendungan utama setinggi 70 meter. Bendungan Tapin memiliki beberapa bangunan pelengkap bendungan salah satunya adalah pelimpah. Pelimpah yang digunakan adalah pelimpah samping, namun tipe pelimpah samping mengakibatkan adanya beban hidrodinamis berupa hempasan (impact) dan menimbulkan vibrasi (vibration). Tipe pelimpah bendung frontal atau pelimpah langsung dapat digunakan agar permasalah hempasan dan vibrasi dapat ditiadakan.
Berdasarkan permasalahan tersebut akan dilakukan pengerjaan tugas akhir untuk menjawab bagaimana merencanakan redesain pelimpah pada Bendungan Tapin dengan menggunakan tipe pelimpah langsung beserta bangunan pelengkap lainnya seperti saluran pengarah, saluran pengatur, saluran peluncur, kolam olak, dan saluran pembuang.
Perencanaan diawali dengan melakukan analisis hidrologi dengan menghitung curah hujan rencana menggunakan metode Pearson Type III. Kemudian dilanjutkan dengan uji kecocokan distribusi frekuensinya menggunakan metode Chi- Square dan Smirnov Kolmogorov sehingga didapatkan hasil yang memenuhi kedua uji kecocokan tersebut. Untuk perhitungan debit banjir rencana, pada perencanaan ini akan digunakan metode Hidrograf Satuan Sintetik (HSS) Nakayasu, didapatkan debit banjir rencana sebesar 1767 m3/dt. Sementara itu, dari hasil flood routing, didapatkan debit pelimpah sebesar 838,41 m3/dt. Dari hasil analisis hidrolika yang telah dilakukan, direncanakan bangunan pelimpah depan, tipe mercu Ogee dengan hulu tegak setinggi 3,5 meter dan lebar 40 meter. Hasil analisis stabilitas terhadap mercu bendung yang direncanakan, menunjukkan hasil yang memuaskan, dimana mercu dinyatakan aman terhadap bahaya rembesan, retak, guling, geser, dan daya dukung tanahnya.
========================================================================================================================================
The Tapin Dam was inaugurated on January 18, 2021. This dam was built to meet the needs of raw water, irrigation water, power plants, as well as for flood management in South Kalimantan Province. Tapin Dam is a dam with the type of Upright Core Stone Pile with the main dam height as high as 70 meters. Tapin Dam has several complementary buildings, one of which is a spillway. The spillway used is a side spillway, but it is causes a hydrodynamic load in the form of impact and causes vibration. The frontal or direct spillway type of spillway can be used to eliminate impact and vibration problems.
Based on these problems, this final project will be carried out to plan the redesign of the overflow at Tapin Dam by using the direct transfer type along with other complementary buildings such as guide channel, control channel, launch channel, stilling basin, and end channel.
Planning begins with conducting a hydrological analysis by calculating the planned rainfall using the Pearson Type III method. Then proceed with the compatibility test of the frequency distribution using the Chi-Square and Kolmogorov-Smirnov methods so that the results that meet the two compatibility tests are obtained. For the calculation of the planned flood discharge, in this plan the Nakayasu Synthetic Unit Hydrograph (HSS) method will be used, then proceed with flood tracking analysis. The design flood discharge was found to be 1767 m3/sec. Meanwhile, from the results of the flood routing, it was found that the overflow discharge was 838.41 m3/s.
From the results of the hydraulics analysis that has been carried out, it is planned to build a front spillway with Ogee crest, and with upstream height of 3.5 meters high and 40 meters wide. The results of the stability analysis of the planned weir crest showed satisfactory results, where the crest was declared safe against the dangers of seepage, cracking, overturning, shearing, and the bearing capacity of the soil.

Item Type:	Thesis (Other)
Additional Information:	RSS 627.883 Nar p-1 2022
Uncontrolled Keywords:	Bendungan Tapin, pelimpah, bangunan pelengkap, stabilitas, Tapin Dam, spillway, complementary building, stability
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TD Environmental technology. Sanitary engineering > TD491 Spillways
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	- Davi Wah
Date Deposited:	26 Oct 2023 04:46
Last Modified:	26 Oct 2023 04:46
URI:	http://repository.its.ac.id/id/eprint/105000

Actions (login required)

View Item