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All Journal Kurva S : Jurnal Keilmuan dan Aplikasi Teknik Sipil Jurnal Teknik Industri Terintegrasi (JUTIN)
MUNAJIR, ACHMAD
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Jurnal Teknik Industri Terintegrasi (JUTIN)

 1 
Analisa Stabilitas Lereng pada Ruas Jalan Patung Lembuswana – Sebulu Sta 31+975 Provinsi Kalimantan Timur Amir, Amir; Munajir, Achmad; Wijaya, Hendra
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 3 (2025): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i3.47007

Abstract

The construction of the Patung Lembuswana–Sebulu STA 31+975 road section in East Kalimantan faces slope stability challenges due to hilly topography and high rainfall, which trigger landslides. This study aims to analyze slope stability using the Fellenius method, evaluate the safety of retaining walls with Rankine and Coulomb approaches, and design pile foundations based on site geotechnical data. The analysis shows a slope safety factor value of less than 1.5, indicating instability. The retaining wall is safe against overturning (safety factor > 2), but unsafe against sliding and bearing capacity failure. The pile foundation design provides a bearing capacity of 823.593 tons, exceeding the planned load of 482.743 tons, and is therefore considered safe. A combination of slope reinforcement, retaining wall design, and pile foundations is recommended to improve overall stability and reduce landslide risk at the project sit. 
Analisa Stabilitas Lereng pada Ruas Jalan Patung Lembuswana – Sebulu Sta 31+975 Provinsi Kalimantan Timur Amir, Amir; Munajir, Achmad; Wijaya, Hendra
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 4 (2025): October
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i4.50079

Abstract

The casting of aluminum alloy AA356 plays a strategic role in the manufacturing industry due to its lightweight, high strength, and corrosion resistance; however, the quality of the casting is highly influenced by the mold cooling mechanism, which governs the phenomena of solidification and filling. This study aims to analyze the effect of mold cooling variations on solidification time, molten metal flow patterns, and the tendency of casting defects, in order to determine the optimal cooling configuration that enhances product quality. The research employed a quantitative approach based on numerical simulation using casting analysis software, combined with a Taguchi experimental design to evaluate mold temperature, coolant flow rate, and cooling channel distance. The simulation results were analyzed using analysis of variance (ANOVA) to identify the most significant parameters, followed by a confirmation test under the optimal conditions. The findings indicate that cooling variations significantly affect filling time, temperature distribution, and porosity levels, with certain cooling configurations capable of reducing solidification defects by more than 20% compared to the standard condition. The study concludes that optimizing the mold cooling system not only improves microstructure quality and mold filling, but also provides practical contributions to enhancing the efficiency of aluminum casting processes as well as theoretical advancements in thermal control of permanent molds.
Co-Authors Amir Amir Daksa, Dody Bimantara Hendra Wijaya Panjaitan, Maraden