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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Manajemen Teknologi dan Teknik Sipil (JURMATEKS) Jurnal Indonesia Sosial Teknologi Jurnal Pendidikan Indonesia (Japendi)
Rendy Satrya, Trihanyndio
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Transportation Other

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Analisis Alternatif Kelongsoran Bendungan Ameroro Pada Batuan Sekis Dengan Metode Elemen Hingga Setiawan, Herdy; Rendy Satrya, Trihanyndio
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 7 No. 2 (2024): DECEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v7i2.6324

Abstract

The geological characteristics of Ameroro Dam,  dominated by schist metamorphic rocks, make this highly vulnerable to weathering, leading to reduced material strength and slope stability. This is exacerbated by rain infiltration which increases pore water pressure and earthquake loads which can trigger soil mass movement, causing a decrease in the slope safety factor.This study aims to evaluate the effect of a combination of environmental factors on slope stability using the finite element method. The research utilizes Plaxis 2D software to simulate various slope conditions under different scenarios, including static conditions, rain infiltration, and seismic loads. The results indicate that Under static conditions, the SF was 2.204, which decreased to 1.867 after rain infiltration, highlighting the adverse impact of water infiltration. To address these challenges, different reinforcement strategies were evaluated. The most effective solution was found to be the combination of 20 cm thick shotcrete, retaining wall, and 5-meter anchor, which increased the SF to 1.81, even under rain infiltration conditions. This combination enhances slope stability by providing surface protection, lateral support, and deep anchorage, effectively distributing loads and minimizing deformation risks. The findings can be the basis for developing optimized slope reinforcement strategies for dams with complex geological conditions.The geological characteristics of Ameroro Dam,  dominated by schist metamorphic rocks, make this highly vulnerable to weathering, leading to reduced material strength and slope stability. This is exacerbated by rain infiltration which increases pore water pressure and earthquake loads which can trigger soil mass movement, causing a decrease in the slope safety factor.This study aims to evaluate the effect of a combination of environmental factors on slope stability using the finite element method. The research utilizes Plaxis 2D software to simulate various slope conditions under different scenarios, including static conditions, rain infiltration, and seismic loads. The results indicate that Under static conditions, the SF was 2.204, which decreased to 1.867 after rain infiltration, highlighting the adverse impact of water infiltration. To address these challenges, different reinforcement strategies were evaluated. The most effective solution was found to be the combination of 20 cm thick shotcrete, retaining wall, and 5-meter anchor, which increased the SF to 1.81, even under rain infiltration conditions. This combination enhances slope stability by providing surface protection, lateral support, and deep anchorage, effectively distributing loads and minimizing deformation risks. The findings can be the basis for developing optimized slope reinforcement strategies for dams with complex geological conditions.
Analisis Pengaruh Infiltrasi Hujan Terhadap Stabilitas Lereng STA 62+450 S/D  62+825 Pada Proyek Jalan Tol Seksi Sp. Indralaya – Prabumulih Dengan Software Geo Studio Oktaliyani, Tiara; Asih Aryani Soemitro, Ria; Rendy Satrya, Trihanyndio
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 7 No. 2 (2024): DECEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v7i2.6561

Abstract

The construction of the Indralaya-Muara Enim Interchange Toll Road, especially the Indralaya-Prabumulih Interchange Section, was hampered by landslides after excavation was carried out between STA 62+450 to 62+825. The combination of steep slopes and rain infiltration weakened the soil structure, increasing the risk of landslidesThis research aims to analyze the effect of rainwater infiltration on slope stability on the Sp Section Toll Road Project. Indralaya–Prabumulih. The research methodology used was to analyze landslide slope areas using the Slope/W and Seep/W programs from Geo Studio. This study evaluated different excavation heights and an initial excavation slope of 1:3. The focus is on calculating the safety factor (SF) at varying rain durations (1 hour, 3 hours, and 5 hours), with SF values ​​below 1.5 indicating instability. The Safety Factor (SF) value of the existing soil before excavation was 1.58, but after 1 hour of rain, the SF decreased to 1.33 (15.66% decrease). After 3 hours, SF dropped to 1.13 (28.34% decrease), and reached 1.10 (30.24% decrease) after 5 hours. Strengthening slopes using the Hydroseeding method increases SF to 1.83, while the use of Retaining Wall increases SF more significantly to 2.54. This research reveals the impact of rain infiltration on soil stability and proves the effectiveness of slope strengthening methods. These results are an important basis for planning effective landslide mitigation on toll road excavations.
Analisis Alternatif Kelongsoran Bendungan Ameroro Pada Batuan Sekis Dengan Metode Elemen Hingga Setiawan, Herdy; Rendy Satrya, Trihanyndio
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 7 No. 2 (2024): DECEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v7i2.6651

Abstract

The geological characteristics of Ameroro Dam,  dominated by schist metamorphic rocks, make this highly vulnerable to weathering, leading to reduced material strength and slope stability. This is exacerbated by rain infiltration which increases pore water pressure and earthquake loads which can trigger soil mass movement, causing a decrease in the slope safety factor.This study aims to evaluate the effect of a combination of environmental factors on slope stability using the finite element method. The research utilizes Plaxis 2D software to simulate various slope conditions under different scenarios, including static conditions, rain infiltration, and seismic loads. The results indicate that Under static conditions, the SF was 2.204, which decreased to 1.867 after rain infiltration, highlighting the adverse impact of water infiltration. To address these challenges, different reinforcement strategies were evaluated. The most effective solution was found to be the combination of 20 cm thick shotcrete, retaining wall, and 5-meter anchor, which increased the SF to 1.81, even under rain infiltration conditions. This combination enhances slope stability by providing surface protection, lateral support, and deep anchorage, effectively distributing loads and minimizing deformation risks. The findings can be the basis for developing optimized slope reinforcement strategies for dams with complex geological conditions.
Pengaruh Stabilisasi Tanah Menggunakan Abu Terbang Dan Kapur Terhadap Perubahan Karakteristik Fisik, Mekanik, dan Nilai CBR Serta Kadar Karbon dalam Tanah Evan Yesa, Ignatius; Rendy Satrya, Trihanyndio; Asih Aryani Soemitro, Ria
Jurnal Pendidikan Indonesia Vol. 5 No. 12 (2024): Jurnal Pendidikan Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/japendi.v5i12.7227

Abstract

Lapisan tanah dasar (subgrade) pada struktur perkerasan jalan merupakan lapisan yang paling krusial. Subgrade tidak hanya menopang beban jalan raya, namun juga beban akibat lapisan perkerasan di atasnya. Forshyte pada tahun 2014 mencoba memprediksi potensi pemanasan global menggunakan metode Life Cycle Assessment (LCA). Berdasarkan penelitian yang telah dilakukan, maka dapat diambil Kesimpulan Nilai kepadatan optimum untuk tanah yang distabilisasi dengan kapur sebesar 3%, 6%, dan 9% secarat berurutan adalah 1,177 gr/cm3, 1,363 gr/cm3, 1,321 gr/cm3. Selanjutnya kepadatan kering optimum tanah yang distabilisasi dengan kapur sebesar 9% dan abu terbang dengan variasi kadar 5%, 10%, 15%, 20%, dan 25% secara berurutan adalah 1,403 gr/cm3, 1,429 gr/cm3, 1,502 gr/cm3, 1,548 gr/cm3, dan 1,600 gr/cm3, Berdasarkan hasil serangkaian yang telah dilakukan, kadar zat aditif yang paling efektif dalam stabilisasi tanah yang digunakan adalah kapur sebesar 9% dan abu terbang sebesar 25%. Namun, dari hasil pengujian emisi karbon diketahui bahwa campuran tersebut menyebabkan emisi karbon dengan level mematikan, sehingga sebaiknya digunakan campuran kapur sebesar 9% dan abu terbang sebesar 25%.
Alternatif Penanganan Masalah Stabilitas Tanah Pada Lereng Galian Proyek Jalan Tol Padang - Sicincin Herlambang, Tomy; Budisatria Mochtar, Indrasurya; Rendy Satrya, Trihanyndio
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i8.61396

Abstract

The Padang–Sicincin Toll Road Construction Project is part of the supporting corridor of the Trans-Sumatra Toll Road, with cut sections at STA 26+825 – 27+400 and STA 28+900 having heights of approximately ±18 meters and ±21 meters. Due to site conditions, ideal slope angles could not be applied, necessitating slope reinforcement using soil nailing based on the design documents. In several locations, cracks appeared on the slopes, creating new issues that require appropriate alternative solutions. The conducted analyses include crack cause analysis, slope stability analysis, and determination of field-based solutions. Slope stability was analyzed at four different locations under conventional (uncracked) and cracked conditions using Slope/W software. The crack cause analysis was carried out through literature studies and field observations. Solutions for the field problems were based on the results of slope stability and crack cause analyses. The analysis results showed that the cracked condition was the most critical compared to the conventional condition, indicated by a decrease in the safety factor and an increase in the depth of the slip surface. The cracks were caused by rainfall leading to soil particle detachment, erosion-prone soil types, and the absence of vegetation cover. The proposed alternative solutions include the use of diversion channels to capture rainwater and prevent surface flow on the slopes, anchors to improve slope stability, geosynthetics to create an impermeable layer on the slope, and drainage wells. It can be concluded that the cut slopes are unstable under both conventional and cracked conditions, with the cracks being caused by erosive agents, soil erodibility, and lack of surface cover. The proposed erosion control alternatives include side channels, anchors, geosynthetics, and drainage wells.
Analysis of the impact of dam slope modifications on the sensitivity to rapid drawdown, earthquakes, and changes in water level at the Jragung Dam in Semarang Regency Rahardani, Rizal Undityo; Rendy Satrya, Trihanyndio
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 7 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i7.1265

Abstract

Urugan-type dams are the most common type of dam to work on in Indonesia, with a material composition that is easy to obtain and relatively more economical. Based on the results of slope stability, a sensitivity analysis will be carried out based on changes in slope slope to post-construction conditions, during reservoir operation water level and rapid drawdown conditions. In this study, we will analyze the changes in the value of safety factors that occur on the slope of the body of the Jragung Dam due to rapid drawdown events and seismicities (OBE and MDE) using the help of seepage analysis calculation software and slope stability. There are three models used, namely Model 1 using geometry according to DED (slope of upstream slope 1: 3.0 and slope of downstream slope 1: 2.5), Model 2 of using modification of field construction geometry (slope of upstream slope 1: 2.5 and slope of downstream slope 1: 2.5), Model 3 of using modification of field construction geometry (slope of upstream slope 1: 2.5 and slope of downstream slope 1: 2,25). From the three models, the initial stage will be processed to find the phreatic line on the dam body when drawdown and the next stage to find the value of the dam slope safety factor. After the overall analysis was carried out both in terms of seepage analysis and stability analysis of the three simulation models, for the construction in the field on the Jragung dam, the 3rd Model can be used, namely the proposed geometric modification with an upstream slope of 1: 2.5 and a downstream slope of 1: 2.25, and material parameters according to the availability specifications at the work site. Regarding the stability of the slope, it is noted that at the time of the MDE earthquake load of 10,000 years, when the rapid-drawdown conditions y/h = 0.5h and y/h = 0.75h there is a possibility that the Jragung dam will be damaged, but not collapsed.
Co-Authors Asih Aryani Soemitro, Ria Budisatria Mochtar, Indrasurya Evan Yesa, Ignatius Herlambang, Tomy Oktaliyani, Tiara Rahardani, Rizal Undityo Setiawan, Herdy