Evaluation of Jatiluhur Dam Safety Based on Risk Index Tools

Ishbaev, Avazbek; Pandjaitan, Nora H.; Erizal, Erizal

doi:10.19081/jpsl.2014.4.2.111

Cited by 3 publications

(3 citation statements)

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“…Menurut (Ishbaev et al, 2014), faktor kerawanan total merupakan resistensi bendungan terhadap kejadian kegagalan yang disebabkan faktor alam. Faktor kerawanan total dapat dihitung menggunakan persamaan berikut (Andersen et al, 2001):…”

Section: Menentukan Faktor Kerawanan Totalunclassified

Penilaian Risiko Bendungan Tilong Berbasis Metode Indeks Risiko

2023

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Risk assessment aims to identify risks that may occur in various conditions, so that the necessary action plan can be carried out if the risk is unacceptable. In this study, the value of safety level in Tilong Dam, located at Kupang Regency, NTT is calculated. The method used in this research is the risk index method. The method is based on a combination of importance of a dam factors, relative importance of physical conditions, and current condition from inspection. The result of this study shows that Tilong Dam has an importance of a dam factors (Idam) was 630, the total index risk was 116,55, and the safety level was 81,5. Tilong dam could be classified as satisfactory condition (safety level75), so that no action plan is needed because it is categorized as safe under normal and extraordinary load conditions.

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Section: Menentukan Faktor Kerawanan Totalunclassified

Penilaian Risiko Bendungan Tilong Berbasis Metode Indeks Risiko

2023

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“…Terdapat enam faktor utama penyebab kegagalan bendungan tipe urugan yaitu: limpasan, rembesan, kebocoran pipa saluran, kerusakan timbunan bagian hulu, stabilitas lereng dan penyebab lainnya (gempa, likuifaksi, sabotase dll). Metode indeks resiko dapat digunakan untuk mengevaluasi keamanan bendungan yang terdiri dari beberapa parameter tersebut (Ishbaev, Pandjaitan, and Erizal 2016).…”

Section: Pendahuluanunclassified

Hubungan Antara Elevasi Muka Air Waduk Dan Panjang Lintasan Rembesan Terhadap Debit Rembesan Pada Bendungan Urugan Batu Inti Tegak (Studi Kasus Bendungan Jatibarang)

Siswanto

Suprapto

Sachro

2019

JTH

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Rockfill dams have better stability than homogeneous soil dams. It allows to design the dam more slim with a higher slope. The disadvantage of rockfill dam is in the core zone as an impermeable zone. Zoned vertical core rockfill dam is a combination of various material properties. Geometry and drainage design will affect the seepage and phreatic line properties that occur. Numerical modeling and calculations are used to calculate the seepage profile more accurately. The combination of the parameters of the permeability coefficient (K), reservoir water level (Δh) and the length of the seepage path (L) can be used to determine the relationship between parameters with the same unit. 2D modeling take into account saturated/unsaturated conditions with steady state on each parameter. This study uses the Jatibarang-Indonesia dam as a basic model. The seepage profile at condition K1 (k = 1x10-5cm/sec) is q/k = -0.0018 (h2/L)2 + 1.3496h2/L + 53.241 and the seepage profile K2 (k=1x10-7cm/s) is q/k = -0.1521 (h2/L)2 + 90.402h2/L + 5480.2. This equations can be used to estimate seepage that occurs in a dam of other rock fill zoned vertical core dam based on the permeability coefficient value (K) more practically for all values of Δh and L reviewed.Keywords: Seepage, Rockfill Dam, Permeability, FEM, Numerical Analysis

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“…Faktor penyebab kegagalan bendungan lainnya yaitu limpasan, rembesan, kebocoran pipa saluran, kerusakan timbunan bagian hulu, stabilitas lereng dan penyebab lainnya (gempa, likuifaksi, sabotase dll). Evaluasi keamanan bendungan dapat menggunakan metode indeks resiko atas berbagai faktor penyebab kegagalan bendungan tersebut [3].…”

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Estimasi dan Evaluasi Debit Rembesan pada Bendungan Urugan Batu Zonal Inti Tegak

Siswanto¹,

Suprapto

Sachro

2019

Reka Buana

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Bendungan urugan batu zonal inti tegak mempunyai geometri yang lebih kompleks dibandingkan dengan bendungan tanah homogen. Banyaknya bentuk geometri dan material yang digunakan menyebabkan prediksi dan perhitungan yang lebih rumit. Pemodelan finite element (FEM) sering digunakan untuk menghitung perilaku rembesan yang terjadi. Tujuan dari penelitian ini adalah untuk mendapatkan model numeris yang dapat digunakan sebagai estimasi debit rembesan sekaligus sebagai validasi pemodelan rembesan pada bendungan urugan batu inti tegak. Evaluasi debit berdasarkan pengukuran instrumen diperlukan untuk validasi pemodelan numeris yang dilakukan. Hukum Darcy dan Casagrande dapat digunakan untuk mengevaluasi pola debit terukur. Debit rembesan berbanding lurus dengan ketinggian muka air waduk dan berbanding terbalik dengan panjang lintasan rembesan. Metode statistik dan regresi digunakan untuk mendapatkan pola rembesan berdasarkan akuisisi data rembesan melalui V-Notch. Estimasi dan pola rembesan ini penting untuk diketahui, sehubungan dengan kinerja electronic instrument yang berpotensi mengalami kerusakan dan sulitnya akses pada gallery karena suatu keadaan. Studi kasus pada paper ini dilakukan pada Bendungan Jatibarang (Semarang), dimana bendungan ini mulai beroperasi penuh pada tahun 2015. Inkonsistensi data debit rembesan terjadi sampai dengan 3 tahun setelah penggenangan bendungan dilakukan. Pola linier hubungan debit rembesan (q) berdasarkan ketinggian muka air waduk (h) yaitu q = 0.5221h - 68.958. Koefisien determinasi pada model tersebut sebesar 78.5%, nilai ini mengindikasikan bahwa model tersebut sudah cukup baik untuk digunakan. Pendekatan ini dapat digunakan sebagai validasi data pada semua jenis pemodelan sesuai dengan tujuan pemodelan tersebut akan dilakukan. Kata Kunci : rembesan; bendungan urugan batu; v-notch ABSTRACTVertical zoned rockfill dam has a more complex geometry compared to a homogeneous earthfill dam. The many geometric shapes and materials used to cause more complex predictions and calculations. Finite element (FEM) modeling is often used to calculate seepage behavior. The purpose of this study is to obtain a numerical model that can be used to estimate of seepage discharge and as validation of seepage modeling on zoned vertical rockfill dam. Seepage evaluation based on instrument measurements is needed for validation of numerical modeling performed. Darcy's and Casagrande's Law can be used to evaluate the measured discharge pattern. The seepage discharge is directly proportional to the height of the reservoir water level and inversely proportional to the length of the seepage path. Statistical and regression methods are used to obtain the seepage pattern based on seepage data acquisition using V-Notch. Estimation and seepage pattern is important to know due to the performance of electronic instruments that have apotential damage and difficult access to the gallery. The case study in this paper was carried out at the Jatibarang Dam (Semarang), where the dam began full operation in 2015. The inconsistency of seepage discharge data occurred up to 3 years after the impounding of the dam. The linear pattern of seepage discharge relationship (q) based on reservoir water level (h) is q = 0.5221h - 68.958. The coefficient of determination in the model is 78.5%, this value indicates that the model is good enough to be used. This approach can be used for data validation on all types of modeling in accordance with the purpose of the modeling will be carried out.

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Evaluation of Jatiluhur Dam Safety Based on Risk Index Tools

Cited by 3 publications

References 1 publication

Penilaian Risiko Bendungan Tilong Berbasis Metode Indeks Risiko

Penilaian Risiko Bendungan Tilong Berbasis Metode Indeks Risiko

Hubungan Antara Elevasi Muka Air Waduk Dan Panjang Lintasan Rembesan Terhadap Debit Rembesan Pada Bendungan Urugan Batu Inti Tegak (Studi Kasus Bendungan Jatibarang)

Estimasi dan Evaluasi Debit Rembesan pada Bendungan Urugan Batu Zonal Inti Tegak

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