Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal U Karst Menara: Jurnal Teknik Sipil
Simanjuntak, Mario Antoni
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Engineering Transportation

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Increasing the Safety Factor of Clay Shale Slopes Using Bored Pile by Limit Equilibrium Method Simanjuntak, Mario Antoni; Fathki, Redha; Sriyana
UKaRsT Vol. 9 No. 2 (2025): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i2.7106

Abstract

The clay shale slopes of the Rukoh Dam Supplementary Structure exhibit high susceptibility to weathering and shear strength reduction, which directly impacts long-term stability. This vulnerability demonstrates the importance of slope reinforcement and the need to consider the fully softened condition that represents the long-term behavior of degraded clay shale material in the field. This study aims to determine the stability of the Rukoh Dam Supplementary Structure’s clay shale slopes with bored pile reinforcement. Soil characteristic data were tested in the Laboratory to obtain shear strength. Evaluations were performed at peak and fully softened conditions using Fellenius and Plaxis LE calculations. The bored pile design was calculated based on the slope stability evaluation results and requirements to achieve a safety factor of 1.5. The results showed that slope stability was significantly reduced when the material was fully softened, with a safety factor of 0.74, thus not meeting long-term service requirements. Increasing the stability to FS 1.5 was achieved using a bored pile system with a diameter of 0.8 m and a total length of about 11 m, which can provide a moment capacity of about 364,818 kNm. These findings indicate that bored pile reinforcement can improve long-term slope stability under clay shale conditions.
The EFEKTIVITAS COUNTERWEIGHT DALAM MENGATASI REMBESAN DAN UPLIFT PADA BENDUNGAN SADAWARNA: EFEKTIVITAS COUNTERWEIGHT DALAM MENGATASI REMBESAN DAN UPLIFT PADA BENDUNGAN SADAWARNA Simanjuntak, Mario Antoni; Sriyana; Sadono, Kresno Wikan
Menara: Jurnal Teknik Sipil Vol. 21 No. 2 (2026): Menara : Jurnal Teknik Sipil
Publisher : Teknik Sipil, Fakultas Teknik Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jmenara.v21i2.62283

Abstract

Penelitian ini dilakukan pada Bendungan Sadawarna yang menunjukkan indikasi rembesan dan tekanan uplift pada tubuh bendungan, sehingga diperlukan tindakan mitigasi melalui pembangunan counterweight sebagai upaya perkuatan. Studi ini bertujuan untuk mengevaluasi efektivitas counterweight dalam menurunkan debit rembesan dan meningkatkan stabilitas bendungan. Metode analisis yang digunakan meliputi evaluasi rembesan berdasarkan metode ambang batas, Seepage index, serta pemodelan numerik menggunakan SLOPE/W untuk mengkaji respons hidraulik dan stabilitas lereng setelah pemasangan counterweight. Hasil evaluasi menunjukkan bahwa debit rembesan pada kondisi Elevasi Muka Air Maksimum (+84,00 m) berada jauh di bawah batas yang dipersyaratkan, yaitu 0,0015 liter/menit/meter dibandingkan nilai ambang 0,28 liter/menit/meter. Berdasarkan metode Seepage Index, nilai rembesan sebelum pemasangan counterweight adalah 1,3482 (>1), yang mengindikasikan potensi rembesan berlebih, sedangkan setelah pemasangan nilai turun menjadi 0,3391 (<1), menunjukkan kondisi aman. Hasil pemodelan SLOPE/W menguatkan bahwa perkuatan counterweight memberikan peningkatan signifikan pada stabilitas tubuh bendungan. Secara keseluruhan, penelitian ini menyimpulkan bahwa pemasangan counterweight efektif dalam mengendalikan rembesan, mengurangi risiko uplift, dan meningkatkan tingkat keamanan Bendungan Sadawarna.
Co-Authors Fathki, Redha Kresno Wikan Sadono SRIYANA