Studi Pemilihan Alternatif Kemiringan Maindam Berdasarkan Rembesan Dan Stabilitas Bendungan Jragung Kabupaten Semarang

Azizah, Siti Rismaul (2023) Studi Pemilihan Alternatif Kemiringan Maindam Berdasarkan Rembesan Dan Stabilitas Bendungan Jragung Kabupaten Semarang. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bagian paling penting dari bendungan adalah tubuh bendungan (main dam) karena secara garis besar tubuh bendungan adalah rembesan dan stabilitas. Dalam perencanaan bendungan urugan tanah, terutama bendungan urugan tipe zonal, analisa zona -zona penyusun tubuh bendungan sangat dibutuhkan. Besar ketebalan zona inti sangat mempengaruhi tubuh bendungan terhadap rembesan dan stabilitas bendungan. Pada penelitian ini dilakukan analisa stabiliats dan rembesan tubuh bendungan. Dalam penelitian ini memakai 2 alternatif dimensi tubuh bendungan bagian zona inti yang mepengaruhi ketebalan zona filter halus dan random. Setelah analisa diatas selanjutnya dianalisa rembesan dan stabilitas dengan mengunakan program aplikasi Geo-Studio 2018. Analisis stabilitas longsoran mengunakan aplikasi Geo-Studio sisi hilir pada kondisi eksisting memiliki nilai safety factor sebesar 1.66, muka air banjir 1.62 dan keadaan surut cepat sebesar 1.7. Pada kondisi alternatif 1 mendapat nilai kemanan untuk muka air normal 1.67, muka air banjir sebesar 2.30, dan muka air surut cepat 2.00. Untuk alternatif 2 mendapatkan nilai keamanan untuk muka air normal 2.15, muka air banjir 2.18 dan muka air surut cepat 3.00. Untuk nilai rembesan yang sesuai di alternatif 1 yang mempunyai nilai rembesan sebesar 1.87 X 10-6 m3/detik, muka air banjir sebesar 1.97 X 10-6 m3/detik, dan muka air surut cepat sebesar 1.73 X 10-7 m3/detik akan tetapi untuk nilai stabilitasnya cukup rendah dibandingkan dengan alternatif ke 2.
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The most important part of the dam is main dam because in general the body of the dam is seepage and stability. In planning earthfill dams, especially zonal type embankment dams, analysis of the zones making up the dam body is very much needed. The thickness of the core zone greatly influences dam body against seepage and dam stability.
In this study an analysis of stability and seepage of the dam body was carried out. In this study, 2 alternative dimensions of the dam body were used in the core zone which affected the thickness of the fine and random filter zone. After the above analysis, seepage and stability were analyzed using the Geo-Studio 2018 application program. Not only using the analysis application above, but also using manual calculations, namely by using casagrande for seepage and the Bishop method for stability. Avalanche stability analysis using the downstream side of the Geo-Studio application in the existing conditions has a safety factor value of 1.66, a flood water level of 1.62 and a fast ebb of 1.7. In alternative conditions 1, the safety value for the normal water level is 1.67, the flood water level is 2.30 and the fast ebb water level is 2.00. For alternative 2, the safety value for normal water level is 2.15, flood water level is 2.18 and fast ebb water level is 3.00. For the appropriate seepage value in alternative 1 which has a seepage value of 1.87 X 10-6 m3/sec, a flood water level of 1.97 X 10-6 m3/sec, and a fast ebb water level of 1.73 X 10-7 m3/sec will but the stability value is quite low compared to the second alternative.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Tubuh Bedungan , Kemananan , Stabilitas, Rembesan; Dam Body, Safety, Stability, Seepage
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	SITI RISMAUL AZIZAH
Date Deposited:	06 Sep 2023 06:35
Last Modified:	06 Sep 2023 06:35
URI:	http://repository.its.ac.id/id/eprint/103060

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